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NZS/BS 21:1985 Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions)

Abbreviation
NZS/BS 21:1985
Amendment
Amendment 1- incorporated. Published 20/12/1990.
Valid from
29/09/1985

Information provider
Standards New Zealand
Author
Standards New Zealand, British Standards Institution
Information type
New Zealand Standard
Format
PDF


Description

Specifies a range of pipe threads from 1/16 to 6 for pressure-tight joints together with thread forms, dimensions and tolerances, and designations. Includes appendices for recommended gauging systems and methods of use of gauges. Requirements are given for jointing threads for taper external threads, taper or parallel internal threads and for long-screw threads for long-screws specified in BS 1387.

Scope

This Standard specifies requirements for the following pipe threads:

  • (a) jointing threads, which are pipe threads for joints made pressure-tight by the mating of the threads and are taper external, taper internal or parallel internal threads;
  • (b) longscrew threads, which are parallel pipe threads uses for longscrews (connectors) specified in BS 1387 where a pressure-tight joint is achieved by the compression of a soft material on to the surface of the external thread by tightening a backnut against a socket.

Thread sizes from 1/16 to 6 inclusive are covere by this standard and requirements for thread forms, dimensions and tolerances are given, together with the designation of each type of thread.

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This resource is cited by:

NZS/BS 21:1985 Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions)

This document is CITED BY:

NZS/BS 21:1985 Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions)

Description

Specifies a range of pipe threads from 1/16 to 6 for pressure-tight joints together with thread forms, dimensions and tolerances, and designations. Includes appendices for recommended gauging systems and methods of use of gauges. Requirements are given for jointing threads for taper external threads, taper or parallel internal threads and for long-screw threads for long-screws specified in BS 1387.

View on Information Provider website
NZS/BS 21:1985 Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions)
Description

Specifies a range of pipe threads from 1/16 to 6 for pressure-tight joints together with thread forms, dimensions and tolerances, and designations. Includes appendices for recommended gauging systems and methods of use of gauges. Requirements are given for jointing threads for taper external threads, taper or parallel internal threads and for long-screw threads for long-screws specified in BS 1387.

View on Information Provider website
This resource cites:

NZS/BS 21:1985 Specification for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions)

This document CITES:
New Zealand Standards
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