ASTM F1948-05

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An American National Standard
Designation: F1948 – 05
Standard Specification for
Metallic Mechanical Fittings for Use on Outside Diameter
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Controlled Thermoplastic Gas Distribution Pipe and Tubing
This standard is issued under the fixed designation F1948; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Tubing, and Fittings
F412 Terminology Relating to Plastic Piping Systems
1.1 This specification covers requirements and test methods
F1588 Test Method for Constant Tensile Load Joint Test
forthequalificationofmetallicmechanicalfittingsforusewith
(CTLJT)
outside diameter controlled thermoplastic gas distribution pipe
2.2 ASME Standard:
and tubing as specified in Specification D2513.
ASME B 31.8 Gas Transmission and Distribution Piping
1.2 The test methods described are not intended to be
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Systems
routine quality control tests.
2.3 Federal Specification:
1.3 Thisspecificationcoversthetypesofmechanicalfittings
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OPS Part 192 Title 49, Code of Federal Regulations
described in 3.3.
2.4 Other Document:
1.4 The values stated in inch-pound units are to be regarded
PPI TR-4 Recommended Hydrostatic Strengths and Design
as standard. The values given in parentheses are mathematical
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Stresses for Thermoplastic Pipe and Fitting Compounds
conversions to SI units which are provided for information
only and not considered standard.
3. Terminology
1.5 The following safety hazards caveat pertains only to the
3.1 Definitions are in accordance with Definitions F412
test method portion, Section 7, of this specification. This
unless otherwise specified. Abbreviations are in accordance
standard may involve hazardous material, operations and
with Abbreviations D1600 unless otherwise specified.
equipment. This standard does not purport to address all of the
3.1.1 Thegasindustryterminologyusedinthisspecification
safety concerns, if any, associated with its use. It is the
is in accordance with ASME/ANSI B31.8 or United States
responsibility of the user of this standard to establish appro-
CFR 49 Part 192 unless otherwise indicated.
priate safety and health practices and determine the applica-
3.1.2 The term “pipe” used herein refers to both pipe and
bility of regulatory limitations prior to use.
tubing unless specifically stated otherwise. The term “fitting”
1.6 The text of this standard references notes and footnotes
refers to a mechanical connecting device as described in 3.2.5
which provide explanatory material.These notes and footnotes
and 3.2.7.
(excluding those in tables and figures), shall not be considered
3.2 Definitions:
as requirements of the standard.
3.2.1 Category 1 mechanical fitting, n—fitting for assem-
2. Referenced Documents bling pipe, which includes a compression zone(s) to provide
2 for pressure integrity, leak tightness, and resistance to end
2.1 ASTM Standards:
loads sufficient to cause no less than 25 % elongation of the
D638 Test Method for Tensile Properties of Plastics
piping, as described in this standard.
D1598 Test Method for Time-to-Failure of Plastic Pipe
3.2.2 Category 2 mechanical fitting, n—fitting for assem-
Under Constant Internal Pressure
bling pipe, which includes a compression zone(s) to provide
D1600 Terminology for Abbreviated Terms Relating to
for pressure integrity and leak tightness; Category 2 fittings do
Plastics
not provide for resistance to end loads.
D2513 Specification for Thermoplastic Gas Pressure Pipe,
3.2.3 Category 3 mechanical fitting, n—fitting for assem-
bling pipe, which includes a compression zone(s) for pressure
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ThisspecificationisunderthejurisdictionofASTMCommitteeF-17onPlastic
Piping Systems , and is the direct responsibility of Subcommittee F17.60 on Gas.
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Current edition approved August 1, 2005. Published August 2005. Originally Available from the American Society of Mechanical Engineers, Three Park
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published in 1999. Last previous edition approved in 1999 as E1948–99a DOI: Ave., New York, NY, 10016-5990.
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10.1520/F1948-05. Available from the Office of Pipeline Safety, Research and Special Programs
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Administration, U.S. Department of Transportation, 400 Seventh Street, S.W.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Washington, DC, 20006-1301.
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Standards volume information, refer to the standard’s Document Summary page on Available from the Plastics Pipe Institute, 1801 K Street N.W., Suite 600K,
the ASTM website. Washington, DC, 20006-1301.
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