1 Scope
This Standard specifies the types, dimensions and requirements, materials, pressure-temperature ratings, dimension tolerances, testing, inspection and acceptance, supply requirements, and designation and marking of the large diameter steel pipe flanges.
This standard is applicable to the large diameter steel pipe flanges and blind flanges with the nominal pressure range of Class 75 to Class 900 and the nominal size range of NPS 26 to NPS 60.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated reference, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, the parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
