Material and Equipment Standard: IPS-M-TP-190
Material and Equipment Standard: IPS-M-TP-190
Material and Equipment Standard: IPS-M-TP-190
FOR
AS
ORIGINAL EDITION
AUG. 1993
This Standard is the property of Iranian Ministry of Petroleum. All rights are reserved to the owner.
Neither whole nor any part of this document may be disclosed to any third party, reproduced, stored in
any retrieval system or transmitted in any form or by any means without the prior written consent of the
Iranian Ministry of Petroleum.
Aug. 1993 IPS-M-TP-190
1. SCOPE ............................................................................................................................................ 2
2. REFERENCES ................................................................................................................................ 2
3. UNITS.............................................................................................................................................. 3
4. COMPOSITION ............................................................................................................................... 3
5. ANALYSIS ...................................................................................................................................... 4
6. PROPERTIES ................................................................................................................................. 6
7. STORAGE LIFE AND PACKAGING .............................................................................................. 8
8. INSPECTION................................................................................................................................... 8
9. LABELING ...................................................................................................................................... 9
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Aug. 1993 IPS-M-TP-190
1. SCOPE
This Standard specification which is mainly generated from SSPC Paint No. 16 covers the minimum
requirements for the composition, analysis, properties, storage life and packaging, inspection and
labeling of coal tar epoxy-polyamide paint as primer, intermediate and top coat (finish).
Note:
This standard specification is reviewed and updated by the relevant technical committee on
Feb. 1999. The approved modifications by T.C. were sent to IPS users as amendment No. 1
by circular No. 79 on Feb. 1999. These modifications are included in the present issue of IPS.
2. REFERENCES
Throughout this Standard the following dated and undated standards/codes are referred to. These
referenced documents shall, to the extent specified herein, form a part of this standard. For dated
references, the edition cited applies. The applicability of changes in dated references that occur
after the cited date shall be mutually agreed upon by the Company and the Vendor. For undated
references, the latest edition of the referenced documents (including any supplements and
amendments) applies.
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Aug. 1993 IPS-M-TP-190
Products"
D1544 "Color of Transparent Liquids (Gardner Color Scale)"
D1652 "Epoxy Content of Epoxy Resins"
D2415 "Ash in Coal Tars and Pitches"
3. UNITS
International system of units (SI) in accordance with IPS-E-GN-100 shall be used.
4. COMPOSITION
4.2 Percentage
This paint contains approximately 71% by volume of nonvolatile film-forming solids (pigment and
binder).
4.3 Coal tar pitch used in this paint is defined as a product obtained from the distillation of high
temperature crude coke oven tar, which in itself is a product obtained during the destructive
distillation of coal in slot ovens operated at a temperature above 700°C. The coal tar pitch shall be
composed primarily of a complex combination of three or more membered condensed ring aromatic
hydrocarbons.
4.4 The epoxy resin shall be a di-epoxide condensation product of bisphenol-A and epichlorohydrin
with terminal epoxide groups.
4.5 The polyamide resin shall be a condensation product of a dimerized fatty acid in polyamines.
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Aug. 1993 IPS-M-TP-190
4.6 Acceptable gelling agents are organic derivatives of magnesium montmorillonite and
hydrogenated castor oil. Acceptable activators, if used, are methanol,ethanol, or propylene
carbonate.
4.7 The accelerator shall be 2, 4, 6-tri (dimethylaminomethyl) phenol.
TABLE 1 – COMPOSITION
3
TYPICAL
REQUIRED COMPOSITION INGREDIENT STANDARDS
INGREDIENT -------------------- --------------------------------- ----------------------------------------
Min. Max. COMPONENTS A&B
Wt.% Wt.% Wt.% Vol.%
COMPONENT A
(82 ± 0.5 wt.%)
(80 vol.%)
COAL TAR PITCH 33.0 36.0 28.2 29.0 PARAGRAPHS 4.3 & 5.1.1
POLYAMIDE RESIN 11.0 12.0 9.5 12.4 PARAGRAPHS 4.5 & 5.1.3
1
MAGNESIUM SILICATE 30.0 33.0 25.8 11.9 ASTM D 605
XYLENE2 18.0 21.0 15.4 22.9 ASTM D 364
GELLING AGENT AND 2.5 2.6 2.0 2.4 PARAGRAPH 4.6
ACTIVATOR
ACCELERATOR 1.2 1.3 1.1 1.4 PARAGRAPH 4.7
-------------------- --------- --------
COMPONENT A TOTALS 100 82.0 80.0
COMPONENT B
(18 ± 0.5 wt.%)
(20 vol.%)
LIQUID EPOXY RESIN --- --- 18.0 20.0 PARAGRAPHS 4.8 & 5.1.2
--------- ---------
TOTALS (COMPONENTS A&B) 100 100 100 100
1) When specified in the procurement documents, a dark red colored coating shall be
furnished in which 50% or more (by volume) of the magnesium silicate is replaced by
synthetic red iron conforming to ASTM Standard D3721. The red coating shall meet all of the
test requirements prescribed for the black coating, except that the nonvolatile content of
component A shall be an amount reflecting the greater specific gravity of the iron oxide
pigment.
2) In those cases where the specified volatiles are not permitted, the volatile portion of the
coal tar epoxy coating may be replaced with exempt materials to the extent necessary to
assure compliance with the applicable regulations. The modified coating shall meet all of the
test requirements specified herein except that determination of compliance with the
nonvolatile weight content shall reflect any difference in specific gravity between xylene and
the substituted solvents.
3) The most favorable composition
5. ANALYSIS
5.1 The paint shall conform to the following composition (analysis) requirements:
5.1.1 The coal tar pitch used shall meet the requirements for one of the types listed in Table 2.
5.1.2 The epoxy resin shall be clear, free of turbidity, crystals, and particulate matter and shall meet
the requirements of Table 3.
5.1.3 The polyamide resin shall be clear, free of turbidity and particulate matter and shall meet the
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Aug. 1993 IPS-M-TP-190
requirements of Table 4.
SOFTENING POINT,
IN WATER, DEGREES
C 70 75 54 62 --- --- D 36
INSOLUBLES IN
CARBON DISULFIDE,
% BY WEIGHT --- 20 --- 20 --- 20 D4
ASH, % BY WEIGHT --- 0.5 --- 0.5 --- 0.5 D 2415
DISTILLATION DRY BASIS,
% BY WEIGHT:
0 - 170°C --- --- --- --- --- 0 ---
0 - 250°C --- 0 --- 0 --- --- ---
0 - 270°C --- --- --- --- --- 6 ---
0 - 300°C --- 5 --- 5 --- 15 ---
VISCOSITY, BROOKFIELD, AT
25 °C, POISES 100 160 ---
VISCOSITY, BROOKFIELD, AT
75°C, POISES 7 9 -----
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Aug. 1993 IPS-M-TP-190
1) The amine value is defined as the milligrams of potassium hydroxide equivalent to the
amine alkalinity present in a one gram sample. It is determined by a potentiometric titration
with standard perchloric acid according to the following method:
a) Weigh the approximate amount of well mixed resin to give a titration in the range of
12 to 18 ml into a tared 200 ml berzelius tall form beaker on an analytical balance.
Cover the beaker with aluminum foil to minimize contact with air.
b) From a graduated cylinder, carefully add 90 ml of solvent (Suitable solvents are
nitrobenzene, propylene carbonate, or acetonitrile), insert a stirring bar, cover the
beaker with aluminum foil, and stir on a magnetic stirrer to dissolve the sample. Add
the solvent immediately after weighing the sample. A fume hood should be used for
all operations.
c) From a graduated cylinder, add 20 ml of glacial acetic acid to the sample solution
and stir for several minutes.
d) Immerse the electrodes into the sample solution, stir for two minutes and titrate
potentiometrically with 0.1 N per-chloric acid using the millivolt scale. Record the
millivolt readings every 0.1 ml Plot a graph showing the millivolts against the
titration. The endpoint is the midpoint of the inflection on the titration curve.
e) Conduct a blank determination on 90 ml of the solvent and 20 ml of acetic acid. The
blank need only be determined once for each lot of solvent used. On the majority of
lots used, the blank has been found to be zero.
f) Calculate the amine value using the following formula:
6. PROPERTIES
6.1 The paint shall meet the requirements of tables 2,3 & 4 and sections 6.2 through 6.13.
6.2 Component A of this paint (Table 1) shall meet the requirements of sections 6.3 through 6.6.
6.3 Odor
The odor shall be normal for the materials permitted (ASTM Standard D 1296).
6.4 Color
The color shall be black or dark red, as specified in the procurement documents.
6.5 The viscosity of component A shall not exceed 160 poises when tested as follows:
Fill a container having a diameter and a height of not less than 7. 6cm and 9. 5cm respectively to a
depth of not less than 7. 6cm with a representative sample of component A. Set up a Model RVT or
RVF-100 Brookfield Synchro- Electric Viscometer with a No. 7 spindle and with guard removed.
Bring the sample to ( and thereafter maintain) a temperature of 25°C and stir vigorously for two
minutes with stiff spatula. Immediately after stirring, lower the viscometer until 1/2 of the "neck"
mark on the spindle is covered. Run the viscometer at 100 rpm for one minute and take a reading of
the position of the point on the dial. If the dial reading is 40 or less, the viscosity shall be considered
to be 160 poises or less. If the reading is over 40, immediately start the motor and take additional
readings at one-minute intervals. If one or more readings of 40 or less are obtained out of ten
readings, taken at one-minute intervals, the viscosity of the material shall be considered to be within
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Aug. 1993 IPS-M-TP-190
specification limits.
6.6 The nonvolatile content of component A shall not be less than 77% (by weight) when tested as
follows:
Place a stirrer made of stiff wire into a small disposable aluminum dish of about 5 cm in diameter
and weigh to the nearest 0. 1mg. As rapidly as possible, place between two and three grams of
component A into the dish and weigh immediately to the nearest 0.1 mg. After weighing, spread the
material over the bottom of the dish. Heat the dish, wire, and contents in a well ventilated
convection-type oven maintained at 103-107°C for three hours.
After the material has been in the oven for a few minutes, and periodically thereafter, stir the
material. Cool in a desiccator, weigh to the nearest 0.1 mg, and calculate the percentage of
nonvolatile on a weight basis.
6.8 Odor
Shall be normal for the materials permitted (ASTM Standard D1296).
6.9 Color
The color shall be black or dark red as specified in the procurement documents.
6.10 Sag
The paint shall not sag when tested as follows:
Prepare approximately 500 ml of the material by thoroughly mixing 100 ml of component B into 400
ml of component A. Determine its viscosity immediately after mixing, using the same procedure
outlined in section 6.5, but employing a No. 5 spindle. If all of five readings taken at one-minute
intervals are above 50, reduce the viscosity by adding the thinner in small increments until reading
of not greater than 50 is obtained. Press a strip of 2.5 cm masking tape across the full width of a
solvent cleaned 7.6 cm × 15.2 cm cold-rolled steel panel. The tape shall be parallel to and centered
on the shorter axis of the panel. Within five minutes after making the final check of viscosity, apply
the material to the panel at a wet film thickness of at least 350 microns. The application may be
made with a doctor blade having a gap of approximately 630 microns or by brush. Immediately after
applying the material, carefully remove the masking tape and stand the panel in a vertical position
(with the bare strip horizontal) in a draft-free, 24-27°C location.
Examine the panel after four hours. Sagging or running of the paint into the base area shall
constitute failure of the material to pass the sag test. Save the mixed paint for the penetration and
adhesion tests described in sections 6.11 and 6.12 respectively.
6.11 Penetration
The Paint shall pass the following test:
Select and solvent spray clean two 7. 6 cm × 15. 2 cm cold rolled steel panels in accordance with
ASTM Standard D 609. Draw down in accordance with US Federal Test Method No. 141, Method
2161 a coat of the paint mixed (including any thinning) for the sag test. Allow the film to dry 18 to 24
hours in a horizontal position at 24-27 c and the relative humidity of not over 60%. Apply a second
coat over and at right angles to the first, using freshly mixed paint prepared identically to that used
for the first coat. (Save both paints for preparing adhesion test panels). The drawdown applicator(s)
shall be such as to provide a total dry film thickness of 510-635 microns, and the coats shall be of
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Aug. 1993 IPS-M-TP-190
6.12 Adhesion
The paint shall pass the following test:
Sand blast two steel panels (similar to those used in the penetration test) with a clean, 600-300 mic
nonmetallic abrasive until a uniform, gray-white surface, with well-developed anchor pattern is
achieved.
Blow off dust with a clean air blast. Brush apply one coat each of the two test batches of paint used
for the penetration test panels, allowing the first coat to dry 18 to 24 hours at 24-27°C before
applying the second. Each coat shall be applied at a wet film thickness of 250 to 350 microns. After
the final coat has cured for 120 hours at 24-27°C, test the adhesion of the paint to the metal with a
sharp knife. It shall strongly resist being removed from the metal. Also test the intercoat adhesion by
attempting to separate the coats with the knife. Any delamination of the two coats shall constitute
failure.
7.2 Packaging
The packaging, shall meet the relevant requirements of ASTM D 3951 (88).
8. INSPECTION
8.1 All materials supplied under this specification shall be subject to timely inspection by the
purchaser or his authorized representative. The purchaser shall have the right to reject any
material(s) supplied which is (are) found to be defective under this specification. In case of dispute,
the arbitration or settlement procedure established in the procurement documents shall be followed.
8.2 Samples of any or all ingredients used in the manufacture of this paint may be requested by the
purchaser and shall be supplied upon request, along with the supplier’s name and identification for
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Aug. 1993 IPS-M-TP-190
the material. When samples are required they shall be requested within seven days of the
placement of the order for the paint.
8.3 Unless otherwise specified, the methods of sampling and testing should be in accordance with
US Federal Test Method Standard No. 141, or applicable methods of the American Society for
Testing and Materials.
9. LABELING
9.1 Refer to ANSI Standard Z129.1 "Precautionary Labeling of Hazardous Industrial Chemicals".
9.2 Unless otherwise specified in the procurement documents, 15 litres of component A shall be
packaged in a standard 20 litres container with a lug type removable lid. component B shall be
packaged to the full mark in a 4 liters can with friction lid.
Name: Coal Tar Epoxy-Polyamide Black (or Dark Red) Paint As Primer, Intermediate and ToP
Coat (Finish)
Specification:IPS-M-TP-190 (0)
MESC No. : ...................................................................
No. of components: .....................................................
Maximum temperature resistance: .............................
Type of spray: ...............................................................
Kind and size of spray nozzle tip: ...............................
Cleaning material: ........................................................
Flash point °C: .............................................................
Pot life (hours): ...........................................................
Drying time for overcoating: .....................................
Kind of thinner: ..........................................................
Color: Black (or Dark Red) ........................................
Lot Number :................................................................
Stock Number: ...........................................................
Date of Manufacture: .................................................
Quantity of Paint in Container: ................................
Information and Warnings, (if needed):..................
Manufacturer’s Name and Address: .......................
Design Guide: For guidance on the usage of this paint for various application/environment
and temperature range, reference shall be made to IPS-E-TP-100 (0).
Directions for Use of Coal Tar Epoxy-Polyamide Black (or Dark Red) Paint
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Aug. 1993 IPS-M-TP-190
This paint is intended for use as a primer, intermediate and finish coat(s) over steel which has been
blast cleaned or, blast cleaned and primed with a suitable inhibitive primer.
To Prepare the paint for application, add the entire contents of the epoxy resin (component B)
container to the previously stirred contents of the related container of base (component A) and mix
vigorously for at least two minutes with a power agitator equipped with a 7.6 cm or longer blade.
Some thinning may be desirable for spray application. Use xylene or, where required, the
recommended thinner and not more than 2 liters to 20 liters batch should be added. Apply the paint
as soon after mixing as practicable since the material will thicken substantially over a two-hour
period and may set up in the paint tank within two to four hours during very warm weather unless
cooled prior to or after mixing.
This paint is usually applied by spray in two coats to a dry film thickness of 400 microns at its
thinnest spots. This requires a spreading rate of 1.5 square meters per liter of unthinned paint. In
actual practice, upwards of 300 microns wet paint will probably be required for each 200 micron
coat to obtain the desired minimum thickness. The drying time between coats under normal coating
conditions shall not exceed 72 hours. Long drying times between coats may cause poor intercoat
adhesion, and it is advisable in warm weather to reduce the maximum interval between coats.
Under conditions of hot weather or direct sunlight, it may be necessary to limit the intercoat drying
period to 24 hours or less.
Abusive handling of precoated steel may cause damage to the coating. This is more noticeable at
low temperatures or after extended periods of cure.
This paint may be applied to large surfaces by high pressure airless spray. For application to
complex surfaces, use heavy-duty conventional air atomization spray equipment.
If the application is by brush, apply with a stiff brush heavily loaded with paint; apply quickly and
smoothly, and avoid excessive brushing.
Do not apply this coating when the receiving surfaces or the ambient temperatures are below 10°C,
unless it can reasonably be anticipated that the average ambient temperature will be 10°C or higher
for the five-day period subsequent to the application of any coat. At temperatures between 10° and
15°C allow the mixed paint to stand at least 30 minutes prior to application.
Clean all equipment immediately after use with a suitable solvent. Such cleaning solvents as high-
flash aromatic naphtha, xylene, or toluene are satisfactory for clean-up, but can be improved by
adding 10-20% of methyl isobutyl ketone and 10% isopropyl or normal butyl alcohol.
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Aug. 1993 IPS-M-TP-190
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