1.1 This specification 2 covers electric-fusion-welded austenitic chromium-nickel stainless steel pipe suitable for corrosive or high-temperature service, or both, or for general applications. 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." 1.2 This specification covers the grades of alloy and stainless steel listed in Table 1 . The selection of the proper grade and requirements for heat treatment shall be at the discretion of the purchaser, dependent on the service conditions to be encountered. TABLE 1 Plate and Filler Metal Specifications Grade UNS Desig- nation Material, Type ASTM Plate Specification No. and Grade Filler Metal Classification and UNS Designation A for Applicable B AWS Specification A5.4/A5.4M A5.9/A5.9M A5.11/A5.11M A5.14/A5.14M A5.22/A5.22M A5.30/A5.30M Class. UNS Class. UNS Class. UNS Class. UNS Class. UNS Class. UNS ... N08020 ... A240 N08020 ... ... ... ... ... ... ... ... ... ... ... ... ... N08367 ... A240 N08367 ... ...