PTC-B1.20.1 - ASME

PTC-B1.20.1 Pipe Threads / General Purpose

Copyrighted material licensed to Fermi National Laboratory by Thomson Scientific, Inc. (www.techstreet.com). This copy downloaded on 2015-05-12 15:14:59 -0500 by authorized user Fermi National Lab ASME B1.20.1-2013 Pipe Threads, General Purpose (Inch) 1 INTRODUCTION 1.1 Scope This Standard covers dimensions and gaging of pipe threads of the following seri.

Features

ads included in this Standard are designated by specifying in sequence the nominal pipe size, number of threads per inch, and the thread series symbol as follows: 1⁄8
  –27 NPT 1⁄8
  –27 NPSC 1⁄2
  –14 NPTR 1⁄8
  –27 NPSM 1⁄8
  –27 NPSL Decimal equivalent notation may be substituted for fractional pipe sizes. For example 0.125
  –27 NPT For left-hand threads, add “LH” to the designation. For example 1⁄8
  –27 NPT
  –LH Designations without “LH” will signify right-hand threads. 1.3.2 Each of these letters in the symbols has significance as follows: N p National (American) Standard P p Pipe T p Taper S p Straight C p .