1.1 This specification covers seamless carbon steel pipe for high-temperature service (Note 1) in NPS 1 ⁄ 8 to NPS 48 [DN 6 to DN 1200] (Note 2) inclusive, with nominal (aver-age) wall thickness as given in ASME B36.10M. It shall be permissible to furnish pipe having other dimensions provided such pipe complies with all other requirements of this specification. Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations, and forwelding. When the steel is to be welded,it is presupposed that a welding procedure suitable to the grade of steel and intended use or service will be utilized.
NOTE 1 — It is suggested, consideration be given to possible graphit-ization.
NOTE 2 — The dimensionless designator NPS (nominal pipe size) [DN (diameter nominal)] has been substituted in this standard for such tradi-tional terms as “nominal diameter,” “size,” and “nominal size.”
