DIN EN 1092-1
法兰及其连接 — 管道、阀门、管件和附件用圆形法兰,PN 标识 — 第 1 部分:钢制法兰
Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges
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Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges
Seamless steel tubes for pressure purposes – Technical delivery conditions Part 4: Non-alloy and alloy steel tubes with specified low temperature properties
Flanges for pipes, valves and fittings