标 准 编 号:DIN 28038-1989 简体中文标题:不锈钢制压力容器和加工装置用带圆柱形毂焊接法兰繁体中文标题:不锈钢制压力容器和加工装置用带圆柱形毂焊接法兰English Name:Weld flanges with cylindrical hub for pressure vessels and process apparatus of stainless steel