ISO 228-1 Pipe Threads Where Pressure-Tight Joints Are Not Made on the Threads - Part 1: Dimensions, Tolerances and Designation
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ISO 228-1 Document Information:
Title
Pipe Threads Where Pressure-Tight Joints Are Not Made on the Threads - Part 1: Dimensions, Tolerances and Designation
International Organization for Standardization
Publication Date:
Sep 1, 2000
Scope:
This part of ISO 228 specifies the requirements for thread form,
dimensions, tolerances and
designation for fastening pipe threads, thread sizes 1/16 to 6
inclusive. Both internal and
external threads are parallel threads, intended for the mechanical
assembly of the component parts
of fittings, cocks and valves, accessories, etc.
These threads are not suitable as jointing threads where a
pressure-tight joint is made on the
thread. If assemblies with such threads must be made pressure-tight,
this should be effected by
compressing two tightening surfaces outside the threads, and by
interposing an appropriate seal.
NOTE 1 For pipe threads where pressure-tight joints are made on the
threads, see ISO 7-1.
NOTE 2 ISO 228-2 gives details of methods for verification of
fastening thread dimensions and form,
and recommended gauging systems.
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