标 准 号：BS EN 1092-4-2004 简体中文标题：法兰及其连接件.按PN标注的管道、阀门、配件和附件用圆形法兰.铝合金法兰繁体中文标题：法兰及其连接件.按PN标注的管道、阀门、配件和附件用圆形法兰.铝合金法兰 English Name：Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Aluminum alloy flanges...