This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferritic steel are included as listed in Table 1. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.

Supplementary Requirement S1 of an optional nature is provided. This shall apply only when specified by the purchaser.

The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

Note 1: The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter”, “size”, and “nominal size”.

ASTM A333 Grade 1

ASTM A333 Grade 3

ASTM A333 Grade 4

ASTM A333 Grade 6

ASTM A333 Grade 7 Pipe

ASTM A333 Grade 8

ASTM A333 Grade 9

ASTM A333 Gr.10 pipe

ASTM A333 Grade 11

A370 Test Methods and Definitions for Mechanical Testing of Steel Products

A671 Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures

A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe

E23 Test Methods for Notched Bar Impact Testing of Metallic Materials