DIN 2980:1977DIN 2981:1982DIN 2982:1977DIN 2983:1977DIN 2986:1977DIN 2987-1:1977DIN 2987-2:1977DIN 2988:1977DIN 2990:1977DIN 2991:1977DIN 2993:1977DIN EN 10241:1994
适用范围
The document specifies the requirments for threaded steel fittings, of nominal sizes from DN 6 to DN 150 inclusive, made out of welded or seamless tubes, forgings and rolled bars, for the transportation of liquids and gas.