标 准 号:BS EN 12560-7-2004简体中文标题:法兰及其接头.分级标示法兰用垫圈.钢法兰用涂覆金属的套层垫圈繁体中文标题:法兰及其接头.分级标示法兰用垫圈.钢法兰用涂覆金属的套层垫圈English Name:Flanges and their joints - Gaskets for class-designated flanges - Covered metal jacketed gaskets for use with steel flanges