American Society for Testing and Materials (ASTM). 2004. 10p. This specification covers seamless carbon steel pipe for high-temperature service in NPS Vs to NPS 48 [DN 6 to DN 1200] inclusive, with nominal (average) wall thickness as given in ASME B
36.lOM. 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 for welding. 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