... requirements .Detailed informations StandardANSI B16.9, DIN 2605, GB, DIN, JIS ETCMaterialA234 WP5, WP9, WP11, WP12, WP22, WP91,WP92,A234 WPB ... requirementApplicationPetroleum, Chemical, Power, Gas, Metallurgy, Shipbuilding, Construction and so on JIS/DIN/ASTM/GB pipe fittings