1.1 General
This Standard covers seamless, continuous welded, electric welded (flash welded
pipe and low frequency electric welded pipe excluded), and submerged arc welded
pipe primarily intended for use in oil or gas pipeline systems. Notes:
(1) Flash welded pipe is pipe manufactured by a process combining electric
resistance heating to produce a simultaneous coalescence over the entire area
of the abutting edges and the application of pressure for joining. (2) Low
frequency is less than 1 kHz. 1.2 Size, Grade, and Category 1.2.1 Diameter and Wall Thickness This Standard covers pipe having specified outside diameters from 10.3 mm to
2032 mm inclusive. The standard diameters and wall thicknesses shall be as
given in Table 9.1. 1.2.2 Grade
This Standard covers pipe from Grade 172 to Grade 550 inclusive. The standard
grades shall be as given in Table 8.1. 1.2.3 Category
This Standard covers pipe in the following categories:
(a) Category I - Pipe without requirements for proven pipe body notch
toughness;
(b) Category II - Pipe with requirements for proven pipe body notch toughness
in the form of energy absorption and fracture appearance; and
(c) Category III - Pipe with requirements for proven pipe body notch toughness
in the form of energy absorption.
Note: It is not intended that pipe be available in all combinations of size, grade,
category, and manufacturing process. The individual pipe manufacturers should
be consulted to ascertain the availability of specific pipe items.