Standard specification for common requirements for steel flanges, forged fittings,valves,and parts for piping applications / - 1a. ed - Pensilvania : ASTM, 2020 - 9 p.: il. Subjects--Topical Terms: NORMAS TÉCNICASTUBERÍASA961/A961M--2020 Dewey Class. No.: NT ASTM A961/A961M-20