PA-3
SPECIFICATIONS
LINING OF VESSELS FOR IMMERSION SERVICE REFERENCE SOURCES
NACE - National Association of Corrosion Engineers
PURPOSE
P.O. Box 218340
The purpose of this document is to amplify the standard
Houston, TX 77218
information in Carboline’s product data sheets and to
provide more detailed information for proper
specifications and inspection in order to secure the best
EPA - United States Environmental Protection
coating and lining quality.
Agency
Assessment Division/MC 4503F
TABLE OF CONTENTS 401 M Street, SW
Washington, DC 20460
SECTION PAGE
- Reference Sources …â?¦â?¦â?¦â?¦â?¦â?¦â??..1
ACGIH - American Conference of Governmental
1 Coating Evaluation and Selection…â??..2 Industrial Hygienists
2 Specifications…â?¦â?¦â?¦â?¦â?¦â?¦â?¦â?¦â?¦â??.2 1330 Kemper Meadow Drive
Cincinnati, OH 45240
3 Inspection Requirements…â?¦â?¦â?¦â?¦â??.4
4 Surface Preparation 9
OSHA - Occupational Safety & Health Administration
5 Coating Applications 11
Office of Occupational Health Compliance
6 Safety 13 Programming
7 Ventilation 14 200 Constitution Ave., NW
Washington, DC 20210
8 Accelerated Curing and High Heat
Baking 15
ASTM - American Society of Testing & Materials
CHART PAGE 1916 Race Street
Chart I Tank Construction Guide for Lined Philadelphia, PA 19103
Tanks (Figures 1-11) 19
Chart II Accelerated Curing Chart 22
SSPC - Steel Structures Painting Council
Chart III Carboline Coatings Solvent Factors 23 40-24th Street, 6th Floor
Chart IV Carboline Thinners Flash Points 24 Pittsburgh, PA 15222
Chart V A Distribution Requirements for Force
Curing 25
AIHA - American Industrial Hygiene Association
Chart V B Ventilation 26 2700 Prosperity Ave., Suite 250
(A) Horizontal Fairfax, VA 22031
(B) Vertical
Chart VI Coverage Estimation Chart 27
SECTION 1: COATING EVALUATION AND SELECTON
1.1 General
In the selection of an applicable coating and lining, it is important to have an accurate evaluation of
laboratory test data. For guidelines on test evaluations, refer to these references:
1.1.1 Determine the problem and exposure.
1.1.1.1 Plasite Protective Coatings�, “Recommendation and Test Questionnaire.�
1.1.2 Select generic type or types that may be applicable.
1.1.2.1 Plasite Protective Coatings, W.T. Singleton, “Coating Selection Guidelines Based on
Generic Types and Film Thickness,� Feb. 1992.
1.1.2.2 NACE Publication TPC-2, “Coatings and Linings for Immersion Service.�
1.1.2.3 NACE Standards on Test Methods � “TM;� Material Requirements � “MR� and
Recommended Practices � “RP� that are applicable as established by the Technical
Practices Committee. Publications may be obtained by ordering from NACE.
1.1.3 Chemical resistance.
1.1.3.1 Plasite chemical resistance data.
1.1.3.2 NACE Publication TPC-2, “Coatings and Linings for Immersion Service.�
1.1.4 Methods of evaluation and testing.
1.1.4.1 NACE Standard TM-01-74, “Laboratory Methods for the Evaluation of Protective
Coatings Used as Lining Materials in Immersion Service.�
1.2 Conditions to Consider in Coating and Lining Material Selection
1.2.1 Chemical resistance based on laboratory and field history.
1.2.2 Surface preparation and accessibility.
1.2.3 Film thickness-continuity and quality depends on skilled application.
1.2.4 Design of tankage and equipment.
1.2.5 Physical conditions during application including temperature, humidity, size of enclosure,
ventilation and other variables.
1.2.6 Physical abuse, abrasion, impingement, liquid velocities, impact.
1.2.7 Electrochemical, cathodic protection.
1.2.8 Thermal shock, cyclical heating and cooling.
1.2.9 Temperature limits and operating characteristics.
1.2.10 Impurities, combinations and concentrations of reagents, pH range and trace elements, if any.
1.2.11 Chemicals proposed for vessel clean-out.
SECTION 2: SPECIFICATIONS
2.1 General
Writing specifications is an art that requires detailed knowledge of the exposure, the coating material, the
applicator’s skill and the conditions under which the coating is to be applied.
References:
NACE Publication 6J-162, “Guide to the Preparation of Contracts and Specifications for the Application of
Protective Coatings.�
NACE Standard RP-01-78, “Design, Fabrication and Surface Finish of Metal Tanks and Vessels to be
Lined for Chemical Immersion Service.�
NACE Publication 6D-161, “Specification Format for Surface Preparation and Material Application for
Industrial Maintenance Painting.�
NACE Publication 6D-160, “Industrial Maintenance Painting Program.�
Page 2
NACE Publication 6B-157, “Protective Coatings for Atmospheric Use: Their Surface Preparation and
Application, Physical Characteristics and Resistances.�
NACE Publication 6D-163, “A Manual for Painter Safety.�
OSHA Standards � Subpart D � “Walking-Working Surfaces;� Subpart E � “Means of Egress;� Subpart F
� “Powered Platforms, Manlifts and Vehicles � Mounted Work Platforms;� Subpart G � “Occupational
Health & Environment Control;� Subpart H � “Hazardous Materials;� Subpart I � “Personal Protective
Equipment;� Subpart K � “Medical and First Aid, Portable Fire Suppression Equipment, Other Fire
Protection Systems;� Subpart Z � “Toxic and Hazardous Substances.�
2.2 Specification Outline
2.2.1 General Conditions � A brief description of location site, work to be done, procedure of work,
starting date, etc.
2.2.2 Special Conditions � This may include special contingencies such as available work schedule,
working conditions, inspection of site, weather conditions, contract details, etc.
2.2.3 Scope of Work � A brief concise schedule of work to be performed as to quantity, drawing
references, coating systems, etc.
2.2.4 Types of Construction Recommendation.
References:
NACE Standard RP-01-78, “Design, Fabrication and Surface Finish of Metal Tanks and Vessels
to be Lined for Chemical Immersion Service.�
Chart I (Figures 1-11), “Tank Construction Guide for Lined Tanks.�
2.2.4.1 Use round or curved structural members, reinforced whenever possible and require
that all sharp edges be ground to a 1/8� minimum radius.
2.2.4.2 Weld beads shall be continuous and free of porosities and undercutting.
2.2.4.3 Weld splatter shall be removed.
2.2.4.4 Skip welding shall not be permitted. Lap construction shall be welded continuously on
both sides.
2.2.4.5 Nozzles, drains and crevices shall be smooth and self-draining.
2.2.4.6 Where impossible to fill voids, laps and fillets with continuous welds, a 100% solids
non-shrinking compound shall be used that is compatible and similar in resistance to
the lining specified.
2.2.4.7 The coating of old or new riveted tanks generally is considered unsatisfactory where
service is severe and complete continuity of coating film is required.
2.2.5 Inspection Requirements � Shall consist of primary inspection of the work to be completed as
well as the equipment and supplies. Intermediate inspection includes the scrutiny of surface
preparation and actual coating work. The final inspection to include acceptance of appearance,
film thickness, continuity and final cure.
2.2.6 Surface Preparation � Shall include a full description of appearance and anchor pattern required
for the job as well as other requirements such as the abrasive, nozzle pressure, nozzle size,
blasting procedure, etc.
2.2.7 Coating Application � Reference can be made to manufacturer’s current product data sheet with
information extracted and amplified as required to meet special conditions or requirements.
Thinners shall be specified in accordance with coating manufacturer’s recommendations.
2.2.8 Accelerated Curing.
Reference:
Chart II, “Accelerated Curing Chart.�
This may be a specification addendum or part of the application section when force curing is
required.
2.2.9 Safety Requirements � Shall include the safety code of owner and/or applicable state, local and
national (OSHA) safety codes covering working conditions, scaffolding, clothing, fire and
explosion hazards, safety equipment, solvent lighting, ventilation and grounding of vessels.
Page 3
SECTION 3: INSPECTION REQUIREMENTS
References:
SSPC, “Surface Preparation Specifications.�
SSPC, “Pictorial Surface Preparation Standards.�
SSPC, “Profile Comparative Panels.�
NACE Publication RP0288-94, “Recommended Practices for Inspection of Linings on Steel and
Concrete.�
NACE Publication 6F-166, “Recommended Practices for Inspection of Linings on Steel and Concrete.�
D.M. Berger and S.E. Mrox, “Instruments for Inspection of Coatings,� ASTM, Journal of Testing &
Evaluation, Vol. 4, No. 1, 1969.
3.1 Primary Inspection
3.1.1 Inspect equipment and supplies to verify that they are of the approved type and capacity required
for the job and are in good operating condition. This includes a clean, dry, properly trapped and
filtered air supply of sufficient volume and pressure. The abrasive is to be inspected to assure
that it is of the size that will obtain the proper anchor pattern, or profile, non-contaminating and as
specified. The surface shall be inspected to determine if pre-baking or pre-cleaning is required
before blasting to remove contaminants on the surface or in the pores of the substrate.
3.1.2 Spray equipment shall be clean and new hoses are preferred.
3.1.3 Preliminary safety checks shall be made (see SECTION 6: SAFETY) to determine if explosive or
toxic gases are present.
3.2 Intermediate Inspection
3.2.1 Inspect the surface preparation during the blasting and make a final check to verify that the
surface meets the requirements of “white metal blast� and the anchor pattern, or profile,
specified.
3.2.2 Use a surface profile measuring device or comparator as called for in the specifications to verify
the depth of the profile and the number of peaks per square inch. A visual comparison is
provided with Clemtex or KTA-Tator, Inc. anchor pattern panels. Measurements with the Testex
Press-O-Film may also be used. They can be obtained at the following addresses:
Supplier Name Supplier Address Product or Service
Clemtex P.O. Box 15214 Anchor Pattern Panels
Houston, TX 77220
KTA-Tator, Inc. 115 Technology Dr. Anchor Pattern Panels
Pittsburgh, PA 15275
Testex, Inc. P.O. Box 867 Anchor Pattern Panels
Newark, DE 19715
3.2.3 The freshly blasted surface shall be coated the same day surface was blasted or prior to the
formation of rust bloom.
3.2.4 The applicator shall check the coating material to determine there is no jelling or settling that
cannot be remixed using mechanical mixing equipment.
3.2.5 Manufacturer’s recommended thinner shall be used to adjust for variances in temperature and
humidity so as to obtain a good wet appearing film. By spraying a sample, it can be determined
if it is in the proper viscosity range. Coatings of this type will spray with a wide variance in
viscosity and this is the main check in the field. Various types of viscosity measurements are
made with the most common being the Ford Cup #4 and the No. G2 Zahn Cup. Another unit
sometimes used is the standard Poise.
Page 4
3.2.5.1 Thinning is required to adjust coating viscosity. The following table cross-references
the three viscosity measurement types listed in Paragraph 3.2.5.
Poise #4 Ford Cup #G2 Zahn Cup
12 14
15 18
18 21
.50 21 25
24 29
.65 27 32
30 36
.85 33 39
36 43
1.00 40 47
3.2.5.2 The type of thinner and the amount required will vary depending on the following
conditions:
(a) Temperature (e) Viscosity of Coating
(b) Ventilation (f) Type of Coating
(c) Humidity (g) Desired Film Thickness
(d) Type of Spray Equipment
3.2.6 Application technique and coverage rate shall be checked during the coating application. A
rough estimate of coverage shall be made with a wet film gauge used immediately after
application of the coating. Insert into the wet film immediately after making a spray pass with
the gun.
Checking the wet film in this manner indicates to the applicator the amount of coating he is
applying per coat. For example, a 10 mil wet film reading with a 40% solids by volume coating
(without thinning) should dry to a dry film of 4 mils. Using a wet film gauge the painter can add or
subtract passes until the necessary wet film thickness is obtained which will result in the dry film
thickness specified.
3.3 Final Inspection
3.3.1 The general appearance of the film shall be free of runs and sags, orange peel, pinholing,
fisheyes, dry spray (overspray), trash in the film and voids.
3.3.2 Runs and sags trap solvents and generally indicate poor workmanship. Small to moderate runs
and sags may be brushed out. Heavy runs and sags may require sanding and dress coating or
reblasting followed by reapplication of the coating.
3.3.3 Film thickness is specified for the service required, indicating minimum and maximum. The
gauges that measure film thickness generally are the magnetic type and there are many factors
that affect their calibration and reading. Margins of error may run as high as ± 40% for thin films
of 1 to 4 mils and ± 10% for films from 10 to 20 mils. Therefore, they should be frequently
calibrated. Gauges used must have adequate range in order that the anticipated dry film
thickness will be read mid-range on the gauge scale.
3.3.4 Destructive test methods are employed where repairs can be made and, at times, to resolve
controversy over the accuracy of dry film thickness measurements. The Tooke Coating
Inspection Gauge 102/TG, which is an accepted destructive gauge, cuts a V-shaped notch in the
coating with a precision ground cutter blade. The thickness of the coating at the V-cut is then
measured geometrically by viewing through an illuminated microscope that is built in the gauge.
Page 5
3.3.5 Electrical testing to determine the presence and number of discontinuities in a coating film is
performed on a nonconductive coating applied to a conductive surface. The allowable number of
discontinuities should be determined prior to conducting this test since the acceptable number of
discontinuities will vary depending on coating film thickness, design and environment.
Two types of test equipment are used to determine discontinuities: a low voltage wet sponge and
a high voltage spark tester. The low voltage wet sponge tester is used to determine
discontinuities in coating films having a total film thickness of 20 mils or less. The high voltage
spark tester may be used for all film thicknesses, but MUST be used when film thickness is
greater than 20 mils. The high voltage tester can be destructive, particularly if proper output
voltage and type of equipment is not selected. Consult coating manufacturer for the
recommended test voltage and equipment. Refer to NACE Standard “Discontinuity (Holiday)
Testing of Protective Coatings.�
3.3.5.1 Inspection of Coating Continuity.
Reference:
NACE Publication 6F-166, “Recommended Practices for Inspection of Linings on Steel
and Concrete,� Paragraph 17-26, Page 78.
3.3.5.1.1 Descriptive Terminology.
The degrees of continuity are termed as conditions “A,� “B� and “C.�
Condition “A� � Pinhole Free. The applied coating film shall be
continuous.
Condition “B� � Relatively Pinhole Free. The applied film should contain
only a negligible number of points of minor discontinuity. No more than
two points of discontinuity should occur within an area having a radius of
six inches as measured from a point of discontinuity (pinhole). No gross
discontinuity (larger than pinpoint size) should be allowed.
Condition “C� � Commercially Continuous. The applied film should contain
only a minor number of points of discontinuity. No more than two points of
discontinuity should occur within an area having a radius of six inches as
measured from a point of discontinuity (pinhole). No more than 40% of the
total number of allowable points of discontinuity should occur within any
one area equal to 25% of the total area being coated.
Total allowable number of discontinuity points for all specified thicknesses
of coatings in all three conditions defined above are given in the table
below.
Surface Area “A� “B� “C�
Being Coated Pinhole Relatively Pinhole Commercial
(Sq. Ft.) Free Free Continuous
10 0 1 5
10-50 0 2 10
50-100 0 5 20
100-500 0 10 30
500-1000 0 15 50
1000-5000 0 25 75
3.3.5.1.2 Discontinuity Definitions.
“A void, crack, thin spot, foreign inclusion or contamination in the coating
film that significantly lowers the dielectric strength of the coating. May also
be identified as a holiday or pinhole.
Page 6
Holidays, skips and misses are gross discontinuities caused by faulty
workmanship. By common usage in the industrial coatings field, the term
“holidays� has become synonymous with discontinuities.
Pores, voids, fisheyes, pits and pinholes are names of various types of
small cavities or holes in a coating film, all of which may be discontinuities.
These are commonly acknowledged to be caused by: (a) application
short-comings; (b) imperfections of the substrate surface; (c) a
contaminant in the coating film; (d) a contaminant on the substrate; (e) too
rapid release of solvents or products of reaction, such as, water or (f) a
short-coming of the film forming properties of the coating material.
Blisters are faults of the coating film caused by too rapid release of
solvents, products of reaction or entrapped air. Blisters often will occur
after the applied coating has been exposed to high temperatures. Blisters
may or may not become discontinuities, as defined above.
All discontinuities or latent discontinuities (those which may develop later
during service) are to be avoided or corrected. Even when the tests
indicate that the applied coating film contains no discontinuities,
experience has proved that discontinuities can exist or may develop later
during service. This is true for thin film coatings. Thin film coatings
normally should not be used in an environment corrosive enough to cause
catastrophic attack on the substrate.�
3.3.6 Final Cure � There are several ways of checking the final cure. One method is the test where a
specified solvent recommended by the coating manufacturer is placed on the film for a period of
five to ten minutes. The coating in presumed to be approaching its final cure if there is no sign of
dissolving or only a slight softening that hardens after the solvent is removed. The hardness may
be checked against a cured sample. If the condition is severe, force curing is generally
recommended to assure that the final cure is reached before exposure. Some baked coatings
change color when cured and color panels may be provided by the manufacturer showing the
minimum acceptable color change.
3.4 Inspection Test Equipment
3.4.1 Film thickness measurements are usually measured in mils (1 mil = .001�).
3.4.2 The following are non-destructive film thickness gauges suitable for determining dry film
thickness of protective coatings. Before using, ensure that they have been properly calibrated.
3.4.2.1 Elcometer Inspector Thickness Gauge: Permits measurement of non-magnetic
protective coatings applied to a magnetic surface with an accuracy of ± 10%.
3.4.2.2 Positector: Measures non-magnetic coating thickness over ferrous substrates with an
accuracy of ± 3%. Digital reading remains until next measurement taken.
3.4.2.3 MikroTest Thickness Gauge: A highly accurate hand gauge which operates on the
attraction power of a permanent magnet through a non-magnetic coating to the base
steel with an accuracy of ± 5%.
3.4.3 A holiday detector is usually an electronic device (by means of a meter or audible alarm) that
indicates a void or discontinuity.
3.4.3.1 Tinker & Rasor Model M-1: A low voltage, wet sponge type detector considered to be
non-destructive. It operates on a 67-1/2 volt battery and is equipped with a cellulose
sponge probe. When the sponge is moistened with water and passed over a
discontinuity, a small current flows and actuates an audible alarm. This is a portable
device based on the electrical principle of an electromagnetic sensitive relay or solid-
state electronic relay circuit.
3.4.3.2 Tinker & Rasor Model AP-W: A high voltage holiday detector operating at voltages
adjustable between 900 to 35,000 volts. This device, when used in the voltage range
of 3,000 to 4,500 volts, is used in testing for holidays in thicker films, such as, the 40
mil sprayable vinyl ester coatings.
Page 7
3.4.3.3 K-D Bird Dog Detector: A fully electronic resistance comparator of great sensitivity.
The transistor circuit responds instantly to changes in coating resistance by an audible
change in frequency. Good contact to the coating is provided by the wet sponge
electrodes which also furnish moisture for wetting the surface. The instrument
operates on low DC voltage and is non-destructive. This is a portable device based on
the principle of an electronic relaxation oscillator circuit.
3.4.3.4 D.E. Stearns Holiday Detector: A high voltage holiday detector used to locate voids in
heavy coatings. The instrument has an adjustable voltage range of 1,000 to 14,000
volts.
3.4.4 Hardness tests may be read in Pendulum, Sward or Pencil hardness numbers.
3.4.4.1 Sward Hardness Rocker: An instrument used for testing hardness by recording the
number of oscillations as compared to a standard plate glass panel. It is essentially a
pendulum supported by the material being tested and records the resistance ratio.
Results are given in number of rock oscillations compared to the plate glass standard
of 50 oscillations.
3.4.4.2 Castell Pencils: Recognized standards and, in the hands of an experienced operator,
can provide more information on the actual film hardness characteristics than the
Sward Rocker. The pencils are applied according to TT-P-14 lb. Federal Standards
method.
3.4.4.3 Konig Pendulum Hardness Tester: This hardness tester operates with a pendulum
whose fulcrum rides on a horizontal coating panel. The swing of the pendulum is
started at the same length for all coatings. The instrument measures the time taken
for a set decrease in swing length. The softer the coating, the quicker the decrease in
length of swing of the pendulum. Glass is measured at 250 ± 3 seconds.
3.4.5 Inspection Test Equipment Suppliers:
Supplier Name Supplier Address
BYK-Gardner 2435 Linden Lane
Silver Spring, MD 20910
De Felsko Corporation 802 Proctor Avenue
Ogdensburg, NY 13669
KTA-Tator, Inc. 115 Technology Drive
Pittsburgh, PA 15275
Nordson Corporation 555 Jackson Street
Amherst, OH 44001
S.G. Pinney & Associates, Inc. P.O. Box 9220
Port St. Lucie, FL 34985
Technical Inspection Services, 5202 South Shaver Street
Inc. Houston, TX 77034
Tinker & Rasor P.O. Box 281
417 Agostono Road
San Gabriel, CA 91778
Page 8
SECTION 4: SURFACE PREPARATION
4.1 Steel
References:
NACE Publication 6F-163, “Surface Preparation of Steel or Concrete Tank Interiors.�
NACE Publication TM-01-70, “Visual Standard for Surfaces of New Steel Airblast Cleaned with Sand
Abrasive.�
SSPC-SP-5 and SSPC-SP-10.
NACE Publication 6G-164, “Surface Preparation Abrasives for Industrial Maintenance Painting.�
NACE Publication 6G-174, “Centrifugal Wheel Blast Cleaning of Steel Plate, Shapes and Fabrications.�
NACE Publication 6G-176, “Cleanliness and Anchor Patterns Available Through Centrifugal Blast
Cleaning of Steel.�
4.1.1 The compressed air supply shall be of ample volume and pressure and free of oil and moisture.
4.1.2 Preliminary surface preparation prior to blasting such as degreasing, steaming, sealing or
preheating may be necessary to remove grease and oil and other contaminants residing in the
“pores� of the metal.
4.1.3 Steel which has been in previous service, such as hydrochloric acid or other acid service, usually
will require extensive cleaning such as steam (or pre-bake), blast, steam (or pre-bake) and blast
to thoroughly remove all of the contaminants out of the pores of the metal.
4.1.4 The degree of blast and anchor pattern shall be as specified with proper reference as described
in “intermediate inspection.�
4.1.5 A 1-1/2� diameter hose is recommended with 95 to 100 psi at the nozzle for best impact and
production efficiency.
4.1.6 Allow no condensation on a freshly blasted surface prior to the application of the first coat. If the
steel temperature approaches the air dew point by 5°F, it will be necessary to raise the
temperature or use dehumidification equipment to avoid reaching a dew point.
4.1.7 Use only clean, non-contaminating, properly separated and graded, sharp abrasive for all
blasting.
4.1.8 The air supply shall be properly trapped and filtered to prevent contamination of the substrate by
oil and water.
4.1.9 The surface shall be cleaned free of all dust and abrasive with a heavy-duty industrial type
vacuum cleaner.
4.2 Concrete
References:
NACE Publication 6F-163, “Surface Preparation of Steel or Concrete Tank Interiors.�
NACE Publication 6G-166, “Surface Preparation of Concrete for Coating.�
NACE Publication 6H-175, “Surface Preparation and Surfacing Materials for Cementitious Surfaces.�
4.2.1 Inspect for structural failures � cracks, protrusions and fins. Grind surface flush and grind cracks
to “V� configuration. Chip out all loose concrete to width of ¼� minimum.
4.2.2 Repair larger holes, cracks, voids and other imperfections with manufacturer’s recommended
materials.
4.2.3 Concrete surface must have at least 30 days minimum cure, be clean, hard, dense, neutral and
free of laitance, form oil and release agents. Blow holes, pits and cavities shall be opened in
order that they be properly filled and sealed. To prepare the surface use one of the following
methods listed in order of preference:
4.2.3.1 Whip blast with fine grade of abrasive with low nozzle pressure. Pressure and
distance of nozzle from surface depends on characteristics of concrete. Do not
overblast as it will result in high consumption of material and labor.
Page 9
4.2.3.2 Water blasting at pressure of approximately 4000 psi may be used to produce similar
results.
4.3 Abrasive Blasting Equipment
4.3.1 For better efficiency and a proper blast pattern, a Venturi nozzle is preferred. A remote dead
man control shall be used.
4.3.2 Blasting Machines � Any commercially available machine is satisfactory. Those that contain a
recovery system are preferred because they allow for recovery of the more expensive abrasives.
4.3.3 The blasting operator shall be equipped with a filtered air-fed blasting helmet.
4.3.4 Abrasive Suppliers:
Supplier Name Supplier Address
Clemco Industries 1 Cable Car Drive
Washington, MO 63090
Ervin Industries P.O. Box 1168
Ann Arbor, MI 48106
Pangborn Corporation P.O. Box 380, Dept. 20
Hagerstown, MD 21741
Reed Minerals Division of 8149 Kennedy Avenue
Harsco Highland, IN 46322
The Wheelabrator 1606 Executive Drive
Corporation LaGrange, GA 30240
4.3.5 Blasting Abrasives.
4.3.5.1 Natural silica sand has been used for outside work where recovery is impossible. It
has several disadvantages; it may lack angularity, it may contain friable constituents of
an alkaline nature which break up and cling to the surface and it has a high fracture
rate. IT ALSO CONTAINS FREE SILICA WHICH AFTER PROLONGED EXPOSURE
WILL LIKELY CAUSE SILICOSIS. Therefore, an air-fed hood is a requirement and
must be worn by the sandblaster.
4.3.5.2 Crushed flint or “Chat� is used extensively prior to application of metalizing and some
thick film coatings. It owes its angularity to the conchoidal type of fracture
characteristic of flint. Those of very high purity leave a considerable amount of
material imbedded in the surface. MAY CONTAIN FREE SILICA WHICH AFTER
PROLONGED EXPOSURE WILL LIKELY CAUSE SILICOSIS.
4.3.5.3 Crushed slag is extremely angular with a low break-down rate but leaves some
material imbedded in the surface. Tests show this material may or may not completely
be inert from a corrosion standpoint. Check with coating manufacturer on acceptable
type of slag.
4.3.5.4 Angular steel grit is widely used where recovery is possible. It leaves minimum
particles imbedded in the surface.
4.3.5.5 Abrasive particles shall not be reused unless they are cleaned, dried and screened to
the original sizing.
4.3.5.6 Small surfaces, such as repair work, may be blasted with a portable blast gun or
mechanical cleaning, such as, the Von Arx Air Needle Gun or 3M Roto Peen.
Page 10
4.3.5.7 Approximate Rate of Abrasive Flow, Lbs./Hr.
Blast
Sharp
Nozzle
Angular
Orifice Crushed Aluminum Crushed
Sand
Size In. Steel Grit Oxide Flint Garnet Slag
3/16 500 1250 750 450 700 500
1/4 900 2250 1350 800 1250 950
5/16 1200 3250 1950 1150 1800 1400
3/8 1700 4250 2550 1500 2350 1800
7/16 2200 5500 3300 1950 3050 2350
1/2 3000 7500 4500 2650 4100 3200
4.3.6 Surface Preparation Equipment Suppliers:
Supplier Name Supplier Address Product or Service
Clemco Industries 1 Cable Car Drive Automatic & Portable Shop
Equipment (wet & dry blast)
Washington, MO 63090
Clements National Company 6650 S. Narragansett Avenue Portable Shop Equipment
Chicago, IL 60638
Dynabrade 8989 Sheridan Drive 3M Company Roto Peen
Clarence, NY 14031
Alodine® 1200S
Henkel Surface Technologies 32100 Stephenson Hwy.
Madison Heights, MI 48071
Iritite® 14-2
MacDermid, Inc. 245 Freight Street
Waterbury, CT 06702
Oakite Cryscoat 747LTS®;
Oakite Products 50 Valley Road
Oakite Cryscoat Ultraseal®
Berkeley Heights, NJ 07922
Pangborn Corporation P.O. Box 380, Dept. 20 Automatic & Portable Shop
Equipment (wet & dry blast)
Hagerstown, MD 21741
Ruemelin Manufacturing Co. 3860 North Palmer Street Automatic & Portable Shop
Equipment (wet & dry blast)
Milwaukee, WI 53212
Spencer Turbine Company 600 Day Hill Road Industrial Vacuum Cleaning
Equipment
Windsor, CT 06095
The Wheelabrator Corporation 1606 Executive Drive Automatic & Portable Shop
Equipment (wet & dry blast)
LaGrange, GA 30240
SECTION 5: COATING AND LINING APPLICATION
References:
NACE Publication 6B-157, “Protective Coatings for Atmospheric Use: Their Surface Preparation and
Application, Physical Characteristics and Resistances.�
Plasite Protective Coatings, A.L. Hendricks, “Application Problems; Causes, Prevention and Remedies,�
February 1992.
5.1 A first coat shall be brush applied to all welds, seams, corners and rough surfaces and surfaces pitted
from previous exposure. Coating shall be thinned 50% by volume with the appropriate thinner. The
technique for brushing shall be to “brush out� the coating rather than “flow on� the coating.
Page 11
5.2 A minimum surface temperature is required to obtain polymerization of the coating system. Refer to
appropriate Plasite product data sheet for surface temperature requirements. Succeeding coats cannot
be applied without damaging the system until the surface temperature rises sufficiently to obtain
polymerization. Additional thinning will be required when surface temperatures are above 80°F. For
surface temperatures above 110°F, consult the Plasite Technical Service Department.
5.3 Thinners, as specified, shall be used to adjust coating for various application conditions. A ratio of 5-25%
shall be used depending on ambient conditions and metal temperatures. At 75°F, a suggested thinning
ratio is 5-10%; the amount of thinner may be increased at a ratio of approximately 5% per 5°. At higher
temperatures, a slower evaporating solvent must be utilized. Thinner should be added if surface
temperatures are lower than ambient. A faster evaporating solvent must be utilized in this case.
5.4 High humidity conditions may cause “fisheyeing, crawling or blushing.� Coating application shall not be
conducted when the surface temperature is within 5°F of the wet bulb temperature. Environmental
control equipment shall be used when weather conditions do not meet this requirement if coating
application is to continue.
5.5 An experienced spray applicator can tell when addition of thinner is required in order to have the proper
sprayability and flow out of the coating as it is applied to the substrate.
5.6 MEK can be used for cleanup of equipment.
5.7 A “multi-pass� method of spray application, as described in the current Plasite product data sheets, shall
be employed.
5.8 Extreme cleanliness is required. Clean clothing shall be worn, disposable booties shall be used over
work shoes and care shall be taken to avoid contaminating the blasted surface with handprints and
through other negligent acts.
5.9 Previously used hoses must be completely cleaned. New hoses are preferred. When using catalyzed
materials, it is necessary to clean the equipment thoroughly after each use as most catalyst cured
materials cannot be dissolved by their own solvent after partial cure.
5.10 Compatible caulking compounds shall be used in voids, fillets or extremely rough and pitted areas as a
last resort where welding cannot be accomplished. Caulking compounds shall be similar in chemical
resistance and in physical properties to the finished coating material. Apply in “sandwich� form. That is,
coating-caulking-coating for a two-coat system.
5.11 Remove all overspray by dry brushing or scraping.
5.12 Coating Application Equipment:
5.12.1 CONVENTIONAL AIR SPRAY GUNS: The following chart indicates the standard types of
conventional air spray guns, nozzles and air caps recommended for best atomization, material
break-up and high production rates. Use of a pot with an agitator is preferred.
GUN FLUID AIR
Binks #2001 66-SS 63-PB
DeVilbiss JGA-510 E 797
Graco P-800 04 02
Note: The same guns may be used with a stainless needle and tip.
GUN FLUID AIR
Binks #2001 59ASS 251 with a 559SS needle
5.12.2 AIRLESS SPRAY EQUIPMENT: The airless pump shall be of sufficient size to properly atomize
the coating with the spray tip selected. The orifice size required will range between .013� to .035�
varying with the viscosity of the coating. In selecting a spray tip, a suitable fan width for the
configuration of the substrate shall be of major consideration. The amount of thinner required will
vary up to approximately 30% depending on temperature, substrate size and individual
technique.
GUN TIP
Graco Bulldog (or equivalent) .013� - .035�
Page 12
5.12.2.1 The high build vinyl ester coatings require a large capacity pump with a capability of 3
gpm, a minimum tip size of .025� with a 12� spray width recommended. The liquid
pressure shall be in the range of 1800 to 2200 psi. Airless spray is not recommended
for abrasion resistant formulations because of the extreme wear on the tips and lower
units of the pump unless the airless unit is designed for abrasive type materials.
5.12.2.2 Airless Spray Advantages and Disadvantages:
Advantages: No problem with contaminated air. Overspray is kept to a minimum and
the production rate is high. Thick films may be obtained without runs or sags under
some conditions.
Disadvantages: The large output of the gun makes it difficult to handle in small tanks
where working conditions are crowded or cramped causing runs or sags. Due to the
large amount of liquid handled and the easy build properties of this equipment, it is
possible, with improper thinning and improper technique, to apply the coating material
at too high a rate per pass. The end result usually being solvent entrapment and
porous film, runs and sags.
5.13 Equipment Manufacturers:
Supplier Name Supplier Address Product or Service
Binks Manufacturing Co. 9201 W. Belmont Avenue Air Atomizing & Airless Spray
Equipment
Franklin Park, IL 60131
DeVilbiss Ransburg 1724 Indian Wood Circle, Ste. F Air Atomizing & Airless Spray
Equipment
Maumee, OH 43537
Graco, Inc. P.O. Drawer 1441 Airless Spray Equipment
Minneapolis, MN 55440
Nordson Corporation 555 Jackson Street Airless Spray Equipment
Amherst, OH 44001
SECTION 6: SAFETY
6.1 General
The basic concept of safety in surface preparation, coating application and inspection is being
knowledgeable in safety procedure, proper use of safety equipment and being aware of the hazards
involved. Before starting coating application, it is recommended that the applicator read all available
safety data including, but not limited to, OSHA approved material safety data sheet and product data
sheet.
References:
NACE Publication 6D-163, “A Manual for Painter Safety.�
NACE Publication TPC-2, “Coatings and Linings for Immersion Service.�
Occupational Safety and Health Administration, Office of Occupational Health Compliance Programming,
200 Constitution Ave., Washington, DC 20210.
“General Industry Standards,� United States Department of Labor, Occupational Safety and Health,
Washington, DC 20210.
OSHA Regulations 29 CFR 1910 (in its entirety) Pertaining to Work in Confined Areas: OSHA Subparts
B, D, E and F as may apply. Subpart Z � “Toxic and Hazardous Substance,� 1910.1000 “Air
Contaminants,� 1910.1001 through 1910.1017 “Dealing with Specific Contaminants,� Subpart G �
1910.94 “Ventilation,� Subpart H � 1910.106 “Flammable and Combustible Liquids,� 1910.107 “Spray
Finishing Using Flammable and Combustible Liquids,� Subpart I � 1910.133 “Eye and Face Protection,�
1910.134 “Respiratory Protection� and 1910.135, 1910.136 and 1910.137 as may apply. Subpart L �
“Fire Protection,� 1910.156 through 1910.163 as may apply.
Page 13
United States Environmental Protection Agency, Assessment Division, 401 M. Street, S.W., Washington,
DC 20460.
“Handbook of Organic Industrial Solvents,� National Association of Mutual Casualty Company, 20 North
Wacker Drive, Chicago, IL 60606 (1972).
Purging Principles and Practices,� American Gas Association, 1515 Wilson Blvd., Arlington, VA 22209,
Second Edition (1975). SSPC “Good Painting Practice,� Volume 1, Chapter 5.3.
6.2 Scaffolding shall be of the approved type similar to those requirements as suggested by the National
Safety Council and/or the Occupational Safety and Health Administration.
6.3 All electrical equipment shall be explosion proof. All equipment including ladders, tools, etc. must be
spark proof. Workmen’s shoes shall have rubber soles and heels.
6.4 All matches, smoking, flames or sparks resulting from any source including welding must be removed
from the hazardous area.
6.5 All equipment shall be properly grounded per OSHA regulations.
6.6 When working in tanks and other totally enclosed areas, workmen shall be supplied with fresh air fed
masks.
6.7 When working in tanks and other totally enclosed areas, the workmen shall employ the “buddy system�
where at least one person is on constant standby to assist the other in case of emergency.
6.8 Safety Equipment Suppliers:
Supplier Name Supplier Address Product or Service
Clemco Industries 1 Cable Car Drive Airline Filters
Washington, MO 63090
Kaydon Corporation P.O. Box 250 Airline Filters; Air Purifiers; Air
Drying Equipment
515 Bohannon Avenue
Greenville, TN 37745
Mine Safety Appliance Co. RIDC Industrial Park Fresh Air Masks; Hoods; Gloves;
Explosive Gas Detection
121 Gamma Drive
Devices; Airline Filters
Pittsburgh, PA 15238
Pall Trinity Micro Corp. 3643 Route 281 Airline Filters; Air Purifiers
Cortland, NY 13045
Safety Lamp of Houston, Inc. 15550 West Hardy Road Vapor Proof Lighting
Houston, TX 77060
SECTION 7: VENTILATION
References:
See references under SECTION 6: SAFETY.
Chart III, “Plasite Coating Solvent Factors.�
7.1 Ventilation Requirements
7.1.1 Sufficient air changes must be provided to keep the solvent concentration below the lower
explosive limits and to keep the solvent concentration below the allowable threshold limits in ppm
for toxicity.
7.1.2 Solvent vapors shall be removed from the bottom of the tank as most solvents are heavier than
air. A suction intake that is distributed so as to completely remove these fumes and not short
circuit between the fresh air intake and the contaminated air intake is desirable. Ductwork for
accelerated curing may be used for dilution, dispersing and removal as well. Refer to Charts V
A and V B.
7.1.3 Constant monitoring, by use of an approved explosive and toxic gas detection device, such as
available from the firms listed in Paragraph 6.8, is required to assure adequate ventilation to
prevent both explosion and toxicity hazard conditions.
Page 14
7.1.4 It is the user’s responsibility to compute and supply adequate ventilation in order to prevent
explosion and toxicity hazard conditions as prescribed by standards of good safety practices,
local and state regulations, OSHA and other federal regulations.
FACTORS INVOLVED IN COMPUTING CFM REQUIRED ARE BASED ON:
1. PERSONNEL � (NUMBER) & HOURS EXPOSURE
2. VOLUMETRIC SPACE
3. SOLVENTS USED & TOTAL VAPOR VOLUME
4. COATING APPLICATION RATE
5. EVOLUTION RATE
6. TLV (THRESHOLD LIMIT VALUE)
7. LEL (LOWER EXPLOSIVE LIMIT)
8. FLASHPOINT
9. SAFETY DATA SHEETS
Suggested Formula Sources:
1. “Industrial Ventilation Manual of Accepted Practice,� published by American Conference of
Governmental Industrial Hygienists, Section 2 � Dilution Ventilation: Page 2-1, Paragraph 10;
Page 2-2, Paragraph 2; Page 2-4, Paragraph 10; Page 2-5, Paragraph 6; Page 2-6,
Paragraph 5, 1330 Kemper Meadow Drive, Cincinnati, OH 45240.
2. “Handbook of Organic Industrial Solvents,� Pages 11-13, Alliance of American Insurers, Loss
Control Dept., 1501 Woodfield Road, Suite 400 West, Shaumburg, IL 60173.
The American Industrial Hygiene Association, 2700 Prosperity Avenue, Suite 250, Fairfax, VA 22031;
Managing Director: John Meagher publishes a list of Industrial Hygiene Consultants familiar with the
problems of toxicity and ventilation.
IN GENERAL, THE TLV VENTILATION REQUIREMENTS EXCEED THE REQUIREMENTS FOR LEL.
Note: Regardless if adequate ventilation is supplied, good safety practices dictate that workmen be
supplied with fresh air fed masks when working in tanks or other totally enclosed areas.
7.2 Definition of Flash Point
The flash point of a volatile liquid is the minimum or lowest temperature at which the liquid gives off vapor
within a vessel in sufficient concentration to form an ignitable mixture with air. Flash points are
determined using the Closed Cup Method following ASTM standard methods.
7.2.1 For specific information on flash point and percent volume solvent per gallon, refer to OSHA
approved material safety data sheet for each Plasite coating. These material safety data sheets
are available from manufacturer on request.
SECTION 8: ACCELERATED CURING AND HIGH HEAT BAKING
References:
NACE Publication 6D-168, “Contract and Plant Force Painting: Advantages and Disadvantages.�
Chart V A and V B, “Distribution Requirements for Force Curing and Ventilation.�
8.1 When to Specify Accelerated Curing (Surface Temperature 120 - 300°F), insulation is recommended
but may not be required.
8.1.1 When the application temperature is below 65°F and when relatively small field jobs are involved.
Application crews normally complete the job in a shorter period of time at less cost with
assurance that the coating is cured.
8.1.2 When high humidity and condensation conditions prevail. Using the proper air heating unit can
lower the relative humidity in the space.
8.1.3 When severe in-service conditions are involved, or previous test evaluations have been
conducted on accelerated cured coating coupons.
8.1.4 When the finished tank is to be closed and all minute traces of solvent odor must be removed.
Page 15
8.1.5 When recommended by the coating manufacturer for the service employed.
8.1.6 The chemical resistance of many coating materials is increased by elevating the temperature.
This procedure is recommended for many severe services.
8.1.7 For food related service.
8.2 Preparation for Baking Tanks in the Field (Surface Temperatures 300 - 400°F)
8.2.1 Tanks that are lined and cured in the field require proper insulation so as to achieve a uniform
cure. Tank shells and roofs, clips, nozzles, ladders and stairs, etc. shall be temporarily insulated.
8.2.2 Tank bottom supports that have little insulating effect may act as a heat sink and cause difficulty
in obtaining a proper cure. This problem can be solved by heating the bottom portion of the tank
first with proper distribution which may require erecting a false ceiling approximately 6� above the
tank bottom. This confined space may be cured first and the ceiling raised to cure upper levels
of the tank walls and top.
8.2.3 Curing is impossible, regardless of the type and amount of insulation, if any water or sizable air
pockets exist between the tank pad and tank bottom. Temporary insulation that becomes wet
shall be removed and replaced with dry insulation.
8.3 Air Distribution
8.3.1 Air has some of the physical properties of plastic, in that it is flexible, compressible and does not
mix readily with itself where different temperatures are involved. Mechanical handling of air
under constant conditions is similar to that of water in its friction problems, flow and horsepower
requirements.
8.3.2 It is important that the blower for air heating equipment be of adequate size with surplus
horsepower. Whenever possible, variable speed drive or adjustable sheave should be employed
for volume control. Selection of equipment of 25-50% excess capacity in relation to anticipated
needs is standard practice.
8.3.3 A common error made in designing air distribution systems is failure to supply enough air or air
velocity at the coating surface to provide good heat transfer.
8.3.4 To provide adequate heat exchange it is necessary to have a high turbulent velocity directly on
the surface to be heated. Otherwise, the air tends to stratify and the higher temperature air tends
to seek a higher level causing problems in heating the bottom of tanks and vessels. All
discharge outlets should have an approximate velocity of 3500 fpm (standard air).
8.3.5 Poor air distribution is generally caused by poor design including low capacity blower and
continuous ductwork of the same size which drops the velocity at the outlets. This problem can
be overcome by maintaining a constant velocity in each section of the distribution duct, using
numerous small high velocity outlets that maintain a turbulent velocity.
8.4 Accelerated Curing Schedule
Refer to Chart II, “Accelerated Curing Chart.�
This chart shall be referred to for estimating the time-temperature functions and for overcoming the
possibility of solvent blistering that may occur when the coating films containing solvent are heated too
rapidly. This chart was not constructed to indicate a final guaranteed cure. It is to be used with care and
good judgment as many factors affect the force cure such as air distribution, size and shape of vessel,
thickness of steel and exterior surface temperatures. The air dry period is the normal time required, at
ambient temperature, to allow a large percentage of the solvents to leave and start the initial
polymerization of the coating before excessive heat is applied.
8.5 Temperature Controls for Baking
Temperature readings can be obtained in several ways. The direct metal surface reading using
a surface pyrometer is the most accurate and recommended method. A quick indicator method
is the temperature crayon, such as tempil sticks. If used, they should only be used for low
temperature force curing. They are not accurate enough for high temperature baking.
Page 16
8.5.2 Visual inspection is always recommended during the force cure and should follow the coating
manufacturer’s recommendations. High bake coatings are cured after a specific minimum time-
temperature baking schedule. A set of coated coupons that show the various degrees of cure for
baking phenolic coatings may be obtained from the manufacturer.
8.6 Principle Mistakes in Accelerated Curing and High Heat Baking
The principle mistakes made in accelerated curing and baking are insufficient air dry time of the coating
prior to the start of the heating cycle, raising the temperature of ambient too rapidly (raise the
temperature not more than 30°F every 30 minutes), insufficient air volume and poor air distribution, as
well as, not allowing additional time for curing in corners and heavy metal areas of rapid heat loss. Good
judgement, experience and trained supervisory personnel can prevent these costly mistakes.
8.7 Types of Air Heater Units
8.7.1 Ovens of many types are used and it is required they have even distribution of heat with proper
venting. These use electricity and gas and, in a few cases, oil as a source of heat. Direct oil
fired is not acceptable as this will leave oily deposits on the coating film. Ovens are particularly
adaptable because of close temperature control capability and good heat distribution for the
handling of small parts and for production and semi-production work.
8.7.2 Gas or oil fired indirect air heaters (combustion products are discharged separately) will
generally produce air temperatures as high as 150°F above ambient and, in some cases,
ultimate temperatures as high at 280°F. These units are most popular for both shop and field
work. The advantages of these types of units are: units do not form condensation on cold
surfaces; automatic operation; hot air at various temperatures may be used for removing
moisture from tanks or enclosures or preventing condensation overnight on freshly blasted
surfaces; units can be portable and have many other uses where space heating problems exist
and they may be used to supply tempered air and ventilation while workmen are enclosed.
8.7.3 Steam coils and blowers can provide temperature rises of predetermined requirements up to
300°F at 100 psi steam pressure. Many of these types of units are already used as heating and
ventilating units in many plants. In general, however, they are not portable unless they are
provided with their own vehicle and a portable boiler.
The advantages are essentially the same as the advantages for the gas or oil fired indirect units
with the exception that, in general, they are safer because there is no open flame.
8.7.4 Electric strip heater blowers are similar to the steam coil and blower system.
8.7.5 Gas fired direct air heaters, for their size, generate more BTU’s than other type heating units.
The advantages of gas fired air heaters are: less initial cost based on BTU capacity; higher
temperature ranges available, approximately 20% less fuel required for an equivalent BTU output
and uses only clean burning fuels such as natural gas, butane and propane. Do not use fuel oil.
Some of the disadvantages, when compared to the indirect fired units follow: Units cannot be
used for dehumidifying. Combustion products may condense on cold surface causing rust bloom
on the freshly blasted surface or blushing on freshly applied film of coating. Some units of this
type are designed for oven heating and have insufficient blower capacity. This will cause an
uneven distribution of air and heat booster blowers may be necessary in some areas.
If personnel are within enclosure, direct fired units must be approved by the manufacturer for
comfort heating and be given a CO check to ensure unit is operating within allowable safety
limits.
8.7.6 Other sources of equipment that may be used as a field or shop expediency when required are
heat lamps or infrared heating.
Page 17
8.8 Accelerated and Baking Equipment Suppliers:
Supplier Name Supplier Address Product or Service
Aerovent, Inc. 5959 Trenton Lane Steam Coil & Fan Units; Direct
Fired Gas Units
Plymouth, MN 55442
Air Liquide America Corp. P.O. Box 3047 Tempil Sticks
Houston, TX 77253
Clements National Company 6650 S. Narragansett Avenue Electrical Heat Guns (Cadillac
Brand-Flameless-Operates at
Chicago, IL 60638
350 - 1000°F � Nozzle Velocity
at 350°F is 38.5 CFM � at
1000°F nozzle velocity is 8.5
CFM)
1210 East 223rd St., Ste. 321
Global Heat, Inc. A sub-contractor providing on-
site service to coating
Carson, CA 90745
contractors and applicators
requiring gas or electric force
curing and baking
Harden Fan Company 490 Broadway Blowers & Fans
Buffalo, NY 14204
Industrial Combustion P.O. Box 6038 Direct Fired Gas Units; Ovens;
7000 W. 21st Avenue
Engineers, Inc. Indirect Fired Gas-Oil Units
Gary, IN 46406
International Industrial 1021 Centennial Avenue A sub-contractor providing on-
Services site services to coating
Piscataway, NJ 08854
contractors and applicators
requiring gas or electrical force
curing and baking
2420 18th Street
Master Appliance Corporation Electrical Heat Guns (Flameless)
Racine, WI 53403
201 East 18th Street
Maxon Corporation Direct Fired Gas Heaters
Muncie, IN 47302
Modine Manufacturing Co. 1500 DeKoven Avenue Steam Coil & Fan Units
Racine, WI 53403
New York Blower Company 7660 Quincy Street Steam Coil & Fan Units; Direct
Fired Gas Units
Willowbrook, IL 60521
George M. Philpott Co., Inc. 8700 Fruitridge Road Distributors of American Air Filter
District Fired Gas Units
Sacramento, CA 95826
Smith-Victor Corporation 301 North Colfax Street Distributors of S-V Model TL2
Torchlamp
Griffith, IN 46319
Page 18
Page 19
Page 20
Page 21
CHART II
ACCELERATED CURING TIME � TEMPERATURE OPTIONS
CURING TIME IN HOURS REQUIRED AT METAL TEMPERATURES AS INDICATED
° ° ° ° ° ° ° ° ° °
COATING 130°F 140°F 150°F 160°F 170°F 175°F 180°F 190°F 200°F 225°F
729 15 9 6 4½ 3½ 2½ 2 1¾
826 15 9 6 4½ 3½ 2½ 2 1¾
4100 18 10 6 4½ 3½ 2½ 2 1¾
4300 18 10 6 4½ 3½ 2½ 2 1¾
7122 18 10 6 4½ 3½ 2½ 2 1¾
7133HS 8 6 5 4
7156 18 10 6 4½ 3½ 2½ 2 1¾
9052 18 10 6 4½ 3½ 2½ 2 1¾
9060 12 10 6 4
9133 12 10 6 4
Note: Prior to raising the metal to the force curing temperature, it is necessary that an air dry time of 2 to
5 hours at temperatures from 70 to 100°F, with adequate ventilation, be allowed.
The time-temperature accelerated cure options listed are based on good ventilation (see SECTION 7:
VENTILATION REQUIREMENTS and CHARTS V A and V B � DISTRIBUTION REQUIREMENTS FOR
FORCE CURING). While these force cure options are designed to provide adequate cure for routine
immersion environments, certain exposures (such as taste sensitive food and water applications) may
require, based on the user’s own tests or experience, force curing for longer periods than listed.
Page 22
CHART III
PLASITE COATINGS SOLVENT FACTORS
This chart is provided as an aid in determining proper ventilation for prevention of explosion and toxicity hazards.
User is responsible for supplying adequate ventilation in order to prevent explosion and toxicity hazard conditions as
prescribed by standards of good safety practices, local and state regulations, OSHA and other federal regulations.
The following is a definition of terms used in the chart listed below:
THEORETICAL PERCENT BY VOLUME SOLVENT PER GALLON = The total amount in percent volatile material,
by volume, present in a one gallon unit of coating. It should be understood that the total volatile material may be a
combination of solvents with each having a different TLV and LEL rating.
THRESHOLD LIMIT = A set of standards established by the American Conference of Governmental Industrial
Hygienists for concentrations of airborne substances in workroom air: they refer to time-weighted concentrations for a
7 or 8-hour workday and 40-hour workweek.
LOWER EXPLOSIVE LIMIT = The range of concentration of a flammable gas or liquid in which explosion can occur
upon ignition in a confined area. The lowest percentage at which this occurs is the lower limit, and the highest
percentage is the upper limit.
FLASH POINT = The temperature at which a liquid or volatile solid gives off a vapor sufficient to form an ignitable
mixture with the air near the surface of the liquid or within the test vessel. Values listed below are based on Tag
Closed Cup ASTM methods. Flash point is explained in more detail in Paragraph 7.2.
Note: For additional information a U.S. Department of Labor approved material safety data sheet for each Plasite
coating is available upon request.
Plasite Coating Theoretical % Volume Solvent Flash Point
per Gallon * Closed Cup
729 Epoxy 15 ± 2 24°F
726 Epoxy 40 ± 2 24°F
850 Epoxy 19 ± 2 24°F
1246 Epoxy Phenolic 64 ± 2 81°F
2087 Aliphatic Polyurethane 38 ± 2 81°F
2900 Acrylic Polyurethane 36 ± 2 102°F
3066 Phenolic 65 ± 2 41°F
3070 Phenolic 39 ± 2 56°F
7111 Epoxy Phenolic (Pigmented) 55 ± 2 24°F
7122 Epoxy Phenolic (Pigmented) 44 ± 2 24°F
7122HS Epoxy Phenolic 46 ± 2 24°F
7122HAR Epoxy Phenolic 50 ± 2 24°F
7133 Epoxy Polyamide (Pigmented) 50 ± 2 24°F
7133HS Polyamide Epoxy 38 ± 2 24°F
7140 Organic Zinc 41 ± 2 24°F
7159 Epoxy 32 ± 2 41°F
7156 Epoxy Phenolic 47 ± 2 24°F
9029 Polyamide Epoxy N/A 100°F
9052 Epoxy 23 ± 2 24°F
9060 Epoxy 18 ± 2 24°F
9133 Epoxy 14 ± 2 24°F
9500 Epoxy 20 ± 2 81°F
9570 Epoxy 18 ± 2 24°F
9571 Epoxy 18 ± 2 24°F
9573 Epoxy 18 ± 2 24°F
*Note: Percent volume of solvent may vary depending on color.
Page 23
CHART IV
PLASITE THINNERS FLASH POINTS
FLASH POINT
PLASITE THINNER (CLOSED CUP)
4 53°F
8 24°F
15 81°F
20 24°F
30 41°F
69 24°F
70 56°F
71 24°F
72 60°F
86 102°F
87 81°F
95 41°F
201 45°F
Page 24
Page 26
Page 27
May 2003
To the best of our knowledge the technical data contained herein is true and accurate on the date of publication and is subject to change without prior notice. User must contact Carboline Company to
verify correctness before specifying or ordering. No guarantee of accuracy is given or implied. We guarantee our products to conform to Carboline quality control. We assume no responsibility for
coverage, performance or injuries resulting from use. Liability, if any, is limited to replacement of products. NO OTHER WARRANTY OR GUARANTEE OF ANY KIND IS MADE BY CARBOLINE,
EXPRESS OR IMPLIED, STATUTORY, BY OPERATION OF LAW, OR OTHERWISE, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Carboline® and Carbocoat®
are registered trademarks of Carboline Company.
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