GB/T 7306.1-2000: Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 1: Parallel internal and taper external threads

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Scope

This Standard specifies profile, dimensions, tolerances and designation of
parallel internal and taper external threads with 55 degree thread angle where
pressure-tight joints are made on the threads.
This Standard applies to threaded connection of pipes, valves, fittings, cocks
and other pipeline accessories.
It is permissible to add an appropriate sealing medium to thread pairs, such as
apply tape, sealant on the thread surface, etc.

Basic Data

Standard ID	GB/T 7306.1-2000 (GB/T7306.1-2000)
Description (Translated English)	Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 1: Parallel internal and taper external threads
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J04
Classification of International Standard	21.040.30
Word Count Estimation	7,792
Date of Issue	2000-07-24
Date of Implementation	2000-12-01
Older Standard (superseded by this standard)	GB/T 7306-1987
Quoted Standard	GB/T 14791-1993
Adopted Standard	ISO 7-1-1994; MOD
Issuing agency(ies)	State Quality and Technical Supervision
Summary	This standard specifies: tooth type angle of 55��, thread sealing vice itself an inner cylindrical threaded and tapered external thread tooth type, dimensions, tolerances and markings. This standard applies to: pipes, valves, fittings, cocks and other piping accessories threaded coupling. Allows the addition of a suitable threaded vice sealing medium, such as tape wrapped around the threaded surface coated sealant.