ASTM F1498-00e1
(Specification)Standard Specification for Taper Pipe Threads 60° for Thermoplastic Pipe and Fittings
Standard Specification for Taper Pipe Threads 60° for Thermoplastic Pipe and Fittings
SCOPE
1.1 This specification establishes requirements fordimensions and gaging of taper pipe threads used on threaded plastic pipe and fittings.
1.2 Threads meeting this specification shall only be used on those plastic materials deemed suitable by the manufacturer.
1.3 Specialty threads or threads not requiring a leak-tight joint are not covered in this specification. Note 1The terms "wrench makeup" and "wrench tight" are standard terminology for tightness and do not imply using a pipe wrench or other tools which would damage plastic pipe and fittings. The terms "hand-tight" and "hand-tight engagement" refer only to thread gaging (not pipe and fitting connections) and is the definition of the L1 gage length.
1.4 Thread DesignationsThe type of pipe threads included in this specification are designated by specifying in sequence the nominal pipe size, number of threads per inch, and the thread series symbols as follows in accordance with ANSI/ASME B 1.20.1: 3/8-18 NPT. For left-hand threads add LH to the designation, otherwise right-hand threads will be understood. For example: 3/8-18 NPT-LH.
1.4.1 Each of these letters in the symbol has a definite significance as follows: N = National (American Standard) P = Pipe T = Taper
1.5 The values stated in inch-pound units are to be regarded as the standard.
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. For specific precautionary statements, see and .
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An American National Standard
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Designation: F 1498 – 00
Standard Specification for
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Taper Pipe Threads 60° for Thermoplastic Pipe and Fittings
This standard is issued under the fixed designation F 1498; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
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e NOTE—Fig. 1 was editorially updated in November 2004.
1. Scope 2. Referenced Documents
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1.1 This specification establishes requirements fordimen- 2.1 ASTM Standards:
sions and gaging of taper pipe threads used on threaded plastic D1600 Terminology for Abbreviated Terms Relating to
pipe and fittings. Plastics
1.2 Threads meeting this specification shall only be used on E177 Practice for Use of the Terms Precision and Bias in
those plastic materials deemed suitable by the manufacturer. ASTM Test Methods
1.3 Specialty threads or threads not requiring a leak-tight F412 Terminology Relating to Plastic Piping Systems
joint are not covered in this specification. 2.2 ANSI/ASME Standards:
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B1.20.1 Pipe Threads, General Purpose (inch)
NOTE 1—The terms “wrench makeup” and “wrench tight” are standard
B1.7M Nomenclature, Definitions and Letter Symbols for
terminology for tightness and do not imply using a pipe wrench or other
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Screw Threads
tools which would damage plastic pipe and fittings. The terms “hand-
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B47.1 Gage Blanks
tight” and “hand-tight engagement” refer only to thread gaging (not pipe
and fitting connections) and is the definition of the L gage length.
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3. Terminology
1.4 Thread Designations—The type of pipe threads in-
3.1 Terminology is in accordance with Terminology F412
cluded in this specification are designated by specifying in
andabbreviationsareinaccordancewithTerminologyD1600,
sequence the nominal pipe size, number of threads per inch,
unless otherwise indicated.
and the thread series symbols as follows in accordance with
3 3.2 Nomenclature, definitions, and letter symbols for screw
ANSI/ASME B1.20.1: ⁄8-18 NPT. For left-hand threads add
threads are in accordance with ANSI/ASME B1.7M.
LH to the designation, otherwise right-hand threads will be
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understood. For example: ⁄8-18 NPT-LH.
4. American National Standard Taper Pipe Thread Form
1.4.1 Each of these letters in the symbol has a definite
4.1 Thread Form—The form of thread profile specified in
significance as follows:
this specification shall be known as the American National
N = National (American Standard)
Standard Taper Pipe Thread Form. The relations as specified
P = Pipe
T = Taper
herein, for form of thread and general notations are shown in
Fig. 1.
1.5 The values stated in inch-pound units are to be regarded
4.2 Angle of Thread—The angle between the sides of the
as the standard.
thread is 60° when measured in an axial plane. The line
1.6 This standard does not purport to address all of the
bisecting this angle is perpendicular to the axis.
safety concerns, if any, associated with its use. It is the
4.3 TruncationandThreadHeight—Theheightofthesharp
responsibility of the user of this standard to establish appro-
V thread, H, is as follows:
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific H 50.866025p 50.866025/n (1)
precautionary statements, see 7.2.1 and 8.3.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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This specification is under the jurisdiction ofASTM Committee F17 on Plastic Standards volume information, refer to the standard’s Document Summary page on
Piping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings. the ASTM website.
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Current edition approved April 1, 2000. Published July 2000. Originally Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
published as F1498–94. Last previous edition F1498–94. 4th 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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F 1498 – 00
H = 0.866025p = height of 60° sharp V thread b = 1° 47 min. = thread taper angle for 1 16 taper
/
h = 0.800000p = height of thread on product f = depth of truncation at crest
c
p =1/n = pitch (measured parallel to axis) f = depth of truncation at root
r
n = number of threads per inch F = width of flat at crest
c
a = 30° = thread flank angle F = width of flat at root
r
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NOTE 1—For a symmetrical straight screw thread, H = cot a/2n. For a symmetrical taper screw thread, H = (cot a − tan b tan a)/2n, so that the exact
value for anAmerican National Stand
...
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