ASTM D2122-98e1
(Test Method)Standard Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
Standard Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
SCOPE
1.1 This test method covers the determination of diameter, wall thickness, and length dimensions of thermoplastic pipe. Included are procedures for measurement of the inside diameter of pipe intended to be joined by internal fittings, measurement of the average outside diameter for roundable pipe where out-of-roundness is not of primary concern, out-of-roundness measurement and measurement of the average outside diameter of non-roundable pipe, and for determining length and straightness.
1.2 This test method also includes procedures for dimensioning molded thermoplastic pipe fittings.
1.3 The values given in parentheses are provided for information purposes only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
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Designation: D 2122 – 98
Standard Test Method for
Determining Dimensions of Thermoplastic Pipe and
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Fittings
This standard is issued under the fixed designation D 2122; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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e NOTE—Keywords editorially added in November 2003.
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1. Scope B 2.1 Pipe Threads (Except Dryseal)
1.1 This test method covers the determination of diameter,
3. Terminology
wall thickness, and length dimensions of thermoplastic pipe.
3.1 Definitions:
Included are procedures for measurement of the inside diam-
3.1.1 General—Definitions are in accordance with Termi-
eter of pipe intended to be joined by internal fittings, measure-
nology F 412, unless otherwise specified.
ment of the average outside diameter for roundable pipe where
3.1.2 deviation from straightness—the maximum deviation
out-of-roundness is not of primary concern, out-of-roundness
from a straight line exhibited by a pipe specimen divided by the
measurement and measurement of the average outside diameter
length of the specimen.
of non-roundable pipe, and for determining length and straight-
3.1.3 nonroundable pipe—pipe made from a material hav-
ness.
ing a tensile or flexural modulus of elasticity of 150 000 psi
1.2 This test method also includes procedures for dimen-
(103 MPa) or greater, as determined by Test Method D 638 or
sioning molded thermoplastic pipe fittings.
D 790, and in addition, having an outside diameter/wall thick-
1.3 The values given in parentheses are provided for infor-
ness ratio of less than 20.
mation purposes only.
3.1.3.1 Discussion—The above definitions apply to thermo-
1.4 This standard does not purport to address all of the
plastic pipe and are based on the ability or inability of a pipe
safety concerns, if any, associated with its use. It is the
to round out when forced into a tapered socket.
responsibility of the user of this standard to establish appro-
3.1.4 roundable pipe—(a) pipe made from material having
priate safety and health practices and determine the applica-
a tensile or flexural modulus of elasticity less than 150 000 psi
bility of regulatory limitations prior to use.
(103 MPa) as determined by Test Method D 638 or D 790; and
2. Referenced Documents (b) pipe made from a material having a tensile or flexural
modulus of elasticity of 150 000 psi (103 MPa) or greater, as
2.1 ASTM Standards:
determined by Test Method D 638 or D 790, and in addition,
D 618 Practice for Conditioning Plastics and Electrical
2 having an outside diameter/wall thickness ratio of 20 or
Insulating Materials for Testing
2
greater.
D 638 Test Method for Tensile Properties of Plastics
3.1.5 socket bottom—the point at which the pipe stop
D 790 Test Methods for Flexural Properties of Unreinforced
radius intersects wall.
and Reinforced Plastics and Electrical Insulating Materi-
2
als
4. Summary of Test Method
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F 412 Terminology Relating to Plastic Piping Systems
4.1 Alternate Methods—Alternate methods and procedures
F 1498 Specification for Taper Pipe Threads (60°) for Ther-
3 for obtaining dimensions (such as apparatus and procedures
moplastic Pipe and Fittings
using laser, electronic, nuclear, ultrasonic, or other means) are
2.2 ANSI Standard:
not prohibited.
4.1.1 The user of an alternate method shall validate the
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This test method is under the jurisdiction of ASTM Committee F17 on Plastic alternate method. The alternate method is validated when both
Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test
Methods.
Current edition approved April 10, 1997. Published November 1997. Originally
published as D 2122 – 62 T. Last previous edition D 2122 – 95.
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Annual Book of ASTM Standards, Vol 08.01. Available from American National Standards Institute, 11 West 42nd St., 13th
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Annual Book of ASTM Standards, Vol 08.04. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 2122 – 98
the product is measured according to the Apparatus and 7.3.2 Calculate the wall thickness range, E, as a percent, as
Precedure sections presented in this Test Method, and when follows:
found to be in compliance with product specifications.
A 2 B
E 5 100 (1)
A
NOTE 1—Validation of the alternate method is a necessary step in
ensuring compliance with product specifications. Validation generally
where:
involves statistical analysis of data generated using the
...
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