MATERIAL SPECIFICATIONS

- MATERIAL SPECIFICATIONS


Threading

ANSI / ASME B 1.20.1 - 1993

American national standard Institute Pipe threads, general purpose (INCH)

Basic Threading Data

Note :

Taper of threads on all sizes of pipe is ¾” per foot on diameter. Couplings 2 inches and smaller are straight-tapped and sizes 2-½” and over are tapered ¾” per foot on diameter.
- If 5” and larger pipes required with threaded and couplings, the pipe may be furnished with recessed couplings when required.


BS 21 Pipe Thread for Tubes and Fittings

Basic Threading Data

Note :

- linear equivalents are given in lower fi gure of column 6 - 15.
- The design of internally threaded parts shall make allowance for receiving pipe ends up to length in column 11 and to minimum length of useful thread shall be not less t han 80% of the values in column 12.
- All dimensions are in inches