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ISO-7-1 British Standard Pipe Taper

ISO 7-1: Pipe Threads where Pressure-Tight Joints are made on the Threads; Part 1: Dimensions, Tolerances and Designation

ISO 7-1:1994 Foreword
This third Edition cancels and replaces the second edition (ISO 7-1:1982).

ISO 7-1 Scope
This part of ISO 7 specifies the requirements for thread form, dimensions, tolerances and designation for joining pipe threads, sizes 1/16 to 6 inclusive, for joints made pressure-tight by the mating of the threads. These threads are taper external, parallel internal or taper internal and are intended for use with pipes suitable for threading and for valves, fittings or other pipeline equipment interconnected by threaded joints. An appropriate joining medium should be used on the thread to ensure pressure-tight joints.

1. Parallel external pipe threads are not suitable as joining threads.
2. For pipe threads where pressure-tight joints are not made on the threads. see: ISO 228-1.
3. ISO 7-2 gives details of methods of verification of jointing thread dimensions and form and recommended gauging systems.
4. ISO 7-1 is technically equivalent to EN 10226-1 and EN 10226-2 combined.
5. ISO 7-2 is technically equivalent to EN 10226-3.

Original Posting: 11/6/2012
Last Revision:
Error corrections in, or comments about, the above data can be sent to: office@gagecrib.com

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