API 5L SPEC for Line Pipe(5) - Pipe Grade and Steel Grade

Pipe Grade and Steel Grade

The pipe grade for PSL 1 pipe is identical to the steel

grade (designated by a steel name) and shall be as given in Table 1. It

consists of an alpha or alphanumeric designation that identifies the strength

level of the pipe and is linked to the chemical composition of the steel grade.

NOTE The designations

for steel Grade A and steel Grade B do not contain any reference to the

specified minimum yield strength; however, the numerical portion of other

designations correspond with the specified minimum yield strength in SI units

or with the upward-rounded specified minimum yield strength, expressed in psi

for USC units. The suffix “P” indicates that the steel has a specified

phosphorus range.

The pipe grade for PSL 2

pipe shall be as given in Table 1 and consists of an alpha or

alphanumeric designation that identifies the strength level of the pipe.

The steel grade name (designating a steel grade), linked to the chemical

composition of the steel grade, additionally includes a suffix that consists of

a single letter (R, N, Q or M) that identifies the delivery condition (see

Table 3).

NOTE 1 The designation

for Grade B does not contain any reference to the specified minimum yield

strength; however,

the numerical portion of

other designations correspond with the specified minimum yield strength in SI

units or USC units.

NOTE 2 For sour service,

see H.4.1.1.

NOTE 3 For offshore

service, see J.4.1.1.

Other steel grade

designations (steel numbers) that are used in additional to the steel name inEurope are given for guidance in Table L.1.

 

API 5L SPEC for Line Pipe(5) - Pipe Grade and Steel Grade