ASME B16.5 Pipe flanges & flanged fittings

CurrentLatest edition found. Still confirm amendments with the publisher.

Is ASME B16.5 still current?

Yes. 2025 is the latest edition MechAtlas found (MechAtlas review: 12 October 2026). Check the publisher for amendments before you specify it.

Flange reference for NPS 1/2 through NPS 24; scope varies by type and class.

Edition research: 2025, on "stabilized maintenance"

Standard	Relationship	Note
ISO 7005-1 Class series	Similar purpose — not interchangeable without an engineering check

“Similar” never means interchangeable without an engineering check.

Stud bolt / threaded rod (USA (ASME / ASTM), related)
Rod threaded at both ends or full length, used with two nuts for flanges, housings and long clamps.
Pipe flanges; gives bolting sizes for flanges.
Pipe flange (USA (ASME / ASTM), main)
Bolted ring at a pipe end or valve that joins pipes, valves and equipment with a gasket between faces.
Flange WN RF Class 300 NPS 6 Sch 40, ASME B16.5, A105
Grades: Class 150 / 300 / 400 / 600 / 900 / 1500 / 2500
NPS 1/2 to NPS 24.

MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ASME B16.5 or the ASME store.