Attributes . ASTM B75 Alloy C12200, Third-Party Certified to NSF/ANSI 61 Annex G, ASME B16.22, MSS SP-104, MSS SP-109 (5 in to 8 in), NFPA 99 Health Care Facilities Gas and Vacuum Systems and the Compressed Gas Association, Pamphlet G4.1 (Medical Gas) . Names