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Database: 365,228(8 Aug 2026)
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GB/T 7306-1987 in English

GB/T 7306-1987 in English

SUPERSEDED

Pipe threads where pressure-tight joints are made on the threads

  • Issued on:-
  • Implemented on:1988-02-01
  • File Format:PDF
  • Delivery:Via email within 1~3 business days
Price(USD): $260.00
$253.00
Standard No: GB/T 7306-1987
Document status: SUPERSEDED
Superseded by: GB/T 7306.1-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads--Part 1:Parallel internal and taper external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
GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads--Part 2:Taper internal and external threads
Superseded on: 2000-12-01
Title in English: Pipe threads where pressure-tight joints are made on the threads
Title in Chinese: 用螺纹密封的管螺纹
Language: English
File Format: Electronic (PDF)
Delivery: Via email within 1~3 business days
Implemented on: 1988-02-01
Chinese Classification: J04-Basic standards and general methods
Professional Classification: GB-National Standard
Related Keywords: pipe threads
pressure-tight joints
pipe thread
pipe joints
threaded joints


1 Application scope

This standard specifies the thread form, dimension, tolerance and designation of pipe thread for thread pairs on which pressure-tight joints are made. These threads are taper internal and external, parallel internal and taper external and are intended for pipes, pipe joints, cocks, valves and other fittings interconnected by threaded joints.

If necessary, it is allowed to add appropriate jointing medium into the thread pair to ensure the pressure-tight joints.

This standard is equivalent to international standard ISO 7/1-1982 Pipe threads where pressure-tight joints are made on the threads.

2 Thread form

2.1 The taper thread has basic thread form complying with Figure 1 and dimension calculated according to the following equations:

1 Application scope
2 Thread form
3 Codes
4 Terms
5 Basic dimension
6 Tolerance
7 Designation
Additional explanation:

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