Reinforced Epoxy Resin Gas Pressure Pipe and Fittings: Standard Specification For
Reinforced Epoxy Resin Gas Pressure Pipe and Fittings: Standard Specification For
Reinforced Epoxy Resin Gas Pressure Pipe and Fittings: Standard Specification For
This standard has been approved for use by agencies of the Department of Defense.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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D 2517
Transportation of Natural and Other Gas by Pipeline Minimum 6.2 Pipe Dimensions and Tolerances:
Safety Standards. 6.2.1 Diameters—The outside diameter of the pipe shall be
3.1.3 Standards Reinforced Thermosetting Resin Pipe Ma- in accordance with Table 1 when measured in accordance with
terials Designation Code—The pipe material designation code 8.4.1.
shall consist of the abbreviation RTRP followed by type and 6.2.2 Wall Thickness—The wall thickness of the pipe shall
grade in arabic numerals, class by a capital letter and the long meet the requirements given in Table 1 when measured in
term steady pressure strength by a second capital letter. The accordance with 8.4.1.
fittings material designation shall consist of the abbreviation 6.2.3 Lengths—The pipe shall be in lengths as specified on
RTRF followed by type (method of manufacture), grade the purchase order when measured in accordance with 8.4.1.
(general type of resin), class (configuration of joining system), NOTE 3—Either threaded adaptors or bonded joints are acceptable.
and pressure rating. Jointers of up to 5 % of the shipment are acceptable to meet the length
requirements. No section less than 1.5 m (5 ft) long can be used to make
4. Classification a joint and only one jointer can be used in a length.
4.1 Pipe—The pipe covered in this specification is made by 6.3 Fittings Dimensions and Tolerances— The fittings di-
the filament winding process and is described in Specification mensions shall enable the pipe and fittings to be joined and
D 2996. Requirements of this pipe are based on short-term tests shall be measured in accordance with 8.4.2.
defined in this specification.
4.2 Fittings—This specification covers reinforced epoxy NOTE 4—Subcommittee D 20.23 is working towards development of
dimensional requirements for fittings; however, it will be some time
resin fittings described in specification D 5685 and made of the
before the requirements are available. Therefore, the method of measuring
type of materials covered in Section 5, which are capable of is provided only to have a standard method of measuring fittings
being joined to the pipe and will provide a suitable gas dimensions for inspection purposes.
distribution system.
6.4 Short-Term Rupture Strength (Burst Pressure)—The
5. Materials minimum hoop stress at burst for pipe covered by this
specification shall be as listed in Table 2 when tested in
5.1 The resins and reinforcements used to make pipe shall accordance with 8.5. The minimum burst requirements for
be as specified in 5.1.1. fittings covered by this specification shall be 4.82 MPa (700
5.1.1 This specification covers glass fiber reinforced epoxy psi) internal pressure or 27.5 MPa (4000 psi) hoop tensile
resin pipe and fittings as defined in Specification D 2996— stress, whichever is greater, when tested in accordance with 8.5
RTRP 11 AU and RTRP 11 CU and fittings as defined in at temperatures of 23°C (73.4°F) and 65.6°C (150°F), and
specification D 5685-RTRF 11A1D, RTRF 21A1D, RTRF calculated using the equation listed in Test Method D 1599 for
11F2D and RTRF 21A2D. hoop stress. The calculations shall use the fittings wall thick-
NOTE 2—The particular reinforced thermosetting resin included ini- ness and diameter at a point where the wall thickness is at a
tially in this specification for gas pressure piping was selected on the basis minimum and which is also in the section of the fittings which
of engineering test studies made by Battelle Memorial Institute, experi- is not reinforced by the pipe.
mental use in field installations, and technical data supplied by the
6.5 Crush Strength—The minimum stiffness factor at 5 %
manufacturers of the plastics materials used to make the pipe and fittings.
It is the intent of ASTM Committee D-20 on Plastics to consider for deflection of the pipe shall be as shown in Table 2 when tested
inclusion other resins and reinforcements in this specification when in accordance with Test Method D 2412.
evidence is presented to show that they are suitable for gas service. 6.6 Chemical Resistance—The pipe shall not change more
Minimum requirements are an ASTM pipe specification and long-term than 612 % in apparent tensile strength when measured in
strength determined in accordance with Test Method D 2992, Procedure accordance with 8.7.
B, in addition to the requirements of this specification.
NOTE 5—A suitable chemical resistance test for fittings is not available
6. Requirements at the present time and will be added when available.
6.1 Workmanship—The pipe and fittings shall be free of 6.7 Longitudinal (Tensile Strength)—The minimum longi-
visible cracks, holes, foreign inclusions, blisters, and other tudinal tensile strength for pipe covered by this specification
injurious defects. The pipe and fittings shall be as uniform as shall be as listed in Table 2 when tested in accordance with Test
commercially practicable in color, opacity, density, and other Method D 2105.
physical properties. 6.8 Hydrostatic Collapse—The minimum factor for pipe
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D 2517
TABLE 2 Minimum Physical Property Requirements for Pipe Method D 543, except use ring specimens cut from pipe for
this purpose:
Test 23°C 65.6°C
Chemical Concentration, %
Physical Property Method (73.4°F) (150°F)
Fuel Oil No. 1 (Specification D 396) 100
Short-term rupture strength (burst) D 1599 35 000 40 000 t-butyl mercaptan 5 in fuel oil
min, hoop stress, psi Antifreeze agents (at least one shall be used):
Static hydrostatic hoop stress 105 h D 2992 15 000 14 000 Methanol 100
(estimated), min, psi Isopropanol 100
Hydrostatic collapse min, psig D 2924 14.7 11.0 Ethylene glycol 100
Longitudinal tensile strength, min, psi D 2105 8 900 8 300
Parallel plate crush strength, min D 2412 45 41
pipe stiffness factor at 5% deflection Cut specimens from the pipe in accordance with 8.6; test five
specimens with each reagent. Coat specimen edges with
adhesive prior to immersion. Completely immerse the speci-
covered by this specification shall be as listed in Table 2 when mens in the chemicals for 72 h. Upon removal from the
tested in accordance with Test Method D 2924. chemicals, wipe the specimens with a clean dry cloth, condi-
7. Adhesive Requirements tion in the testing room for a period not to exceed 2 h, and then
test in tension in accordance with 8.6.
7.1 Adhesives used to join reinforced epoxy resin pipe shall
8.8 Adhesive Test—The ultimate shear strength for adhe-
be suitable for use with the pipe and fittings and meet the
sives used to bond pipe and fittings together shall be deter-
requirements listed in 7.2 and 7.3.
mined in accordance with the following procedure; it is
NOTE 6—It is recommended that the working (pot) life of the adhesive applicable to all adhesives covered by this specification.
be agreed upon between the purchaser and the manufacturer. 8.8.1 Principle—Laboratory shear specimens are made by
7.2 Adhesive Test—All adhesives covered by this specifica- bonding together two 3 by 13 by 75-mm (1⁄8 by 1⁄2 by 3-in.),
tion shall have a minimum ultimate shear strength of 10.3 MPa reinforced thermosetting plastic laminates using the supplied
(1500 psi) when tested in accordance with 8.8. adhesive kits. This specimen is then cured in accordance with
7.3 Packaging—Each adhesive kit shall contain the neces- instructions supplied with the adhesive. After curing, the
sary components and instruction sheets, which shall include specimen is pulled apart in a universal testing machine.
cure times and pot life. 8.8.2 Test Specimen—The test specimen shall be made
using longitudinally reinforced epoxy resin laminates that are
8. Test Methods made of the same materials as the pipe with dimensions of 5 by
8.1 Sampling—Take a sample of the pipe and fittings 13 by 75 mm (1⁄8 by 1⁄2 by 3 in.). Each specimen shall have a
sufficient to determine conformance with this specification. bonding surface on one end made by milling off 5 mils of the
About 15 m (50 ft) of pipe or tubing are required to make the surface for a length of 2 mm (3⁄4 in.). Test a minimum of five
tests prescribed. The number of fittings required varies, de- test specimens.
pending upon the size and type of fitting. It is suggested that a 8.8.3 Procedure:
sampling plan be agreed upon by the purchaser and the 8.8.3.1 Clean the milled surfaces of two 75-mm (3-in.) long
manufacturer (see Practice D 1898). laminates using solvent supplied with adhesive.
8.2 Conditioning—Unless otherwise specified, condition 8.8.3.2 Mix the adhesive components in accordance with
the specimens prior to test at 23 6 2°C (73.4 6 3.6°F) and 50 instructions supplied with the adhesives.
6 5 % relative humidity for not less than 48 h, in accordance 8.8.3.3 Wet the cleaned surface of the laminates with the
with Procedure A of Practice D 618 for those tests where mixed adhesive.
conditioning is required and in all cases of disagreement.
8.8.3.4 Press the adhesive-coated areas of the laminates
8.3 Test Conditions—Conduct the tests in the Standard
together, maintaining alignment of edges and clamp so that the
Laboratory Atmosphere of 23 6 2°C (73.4 6 3.6°F), unless
specimen is held together using uniform pressure. Pressure
otherwise specified.
used shall be sufficient to yield specimens with adhesive line
8.4 Dimensions and Tolerances:
thicknesses that do not exceed 0.9 mm (1⁄32 in.).
8.4.1 Wall Thickness and Diameter—Determine in accor-
8.8.3.5 Note the time when assembly is completed.
dance with Practice D 3567.
8.4.2 Liner Thickness—When the test specimens contain a 8.8.3.6 Check the temperature in the room and determine
liner, determine the average liner thickness in accordance with the cure time from instructions supplied with the adhesive.
Practice D 3567. 8.8.3.7 When the required amount of time has elapsed,
8.5 Short-Term Hydrostatic Failure Strength (Minimum remove the specimen from the clamping fixture, and place it in
Hoop Stress)—Determine in accordance with Test Method grips of the universal testing machine. Good alignment in the
D 1599. Fittings shall be tested with pipe nipples bonded in the grips is essential. Set speed control at 5.1 to 6.4 mm (0.20 to
sockets. 0.25 in.)/min and start the testing machine. Record the break-
8.6 Apparent Tensile Properties—The apparent tensile ing load.
strength shall be determined in accordance with Procedure B of 8.8.4 Calculation—Calculate the ultimate shear strength of
Test Method D 2290. the adhesive using the following equation and report to three
8.7 Chemical Resistance—Determine the resistance to the significant figures:
following chemicals in accordance with Procedure II of Test s 5 P/A (1)
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D 2517
APPENDIXES
(Nonmandatory Information)
X1. DESIGN
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D 2517
X2. RECOMMENDED IN-PLANT QUALITY CONTROL PROGRAM FOR REINFORCED EPOXY RESIN PIPE INTENDED
FOR USE IN NATURAL GAS SERVICE
SUMMARY OF CHANGES
(1) Added fitting specification (2) Expanded materials section to cover fittings.
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