EN 1092-1:2007 法蘭及其連接件.按PN標注的管,閥門,配件和附件用圓形法蘭.第1部分:鋼法蘭
Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges (Incorporates Amendment A1: 2013; Incorporating Corrigendum May 2014)