1. Scope

1.1 This specification covers nominal (average) wall seamless alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.

1.2 Several grades of ferritic steels (Note 1) are covered. Their compositions are given in Table 1.

Note 1Ferritic steels in this specification are defined as low- and intermediate-alloy steels containing up to and including 10 % chromium.

1.3 Supplementary requirements (S1 to S7) of an optional nature are provided. These supplementary requirements call for additional tests to be made, and when desired, shall be so stated in the order together with the number of such tests required.

1.4 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 2The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as 'nominal diameter,' 'size,' and 'nominal size.'

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

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

E92 Test Method for Vickers Hardness of Metallic Materials

E213 Practice for Ultrasonic Testing of Metal Pipe and Tubing

E309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation

E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings

E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

E570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products

ASME Standard

Keywords

alloy steel pipe; high temperature service; seamless steel pipe; steel pipe; temperature service applications: Alloy steel pipe--specifications; Ferritic steel pipe--specifications; High-temperature service applications--steel pipe; Hydrostatic testing; Seamless steel pipe--specifications;

ICS Code

ICS Number Code 23.040.10 (Iron and steel pipes)

DOI: 10.1520/A0335_A0335M-05

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