1) Tuam Tshoj siab-kub ntsuas tus qauv
"Steel Valves - General Requirements" GB / T 12224
"Steel Pipe Flange Technical Conditions" GB / T 9124
"Power Station Valves - General Requirements" JB/T 3595
2) Hom txawv teb chaws siab-kub ntsuas ntsuas tus qauv
ASME B 16.34 "Flanged, threaded thiab welded li qub"
ASME B 16.5 "Pib Flanges thiab Flange Fittings"
ASME B 16.1 "Grey Hlau Yeeb Nkab Flanges thiab Flange Fittings"
ASME B 16.24 "Cast Copper Alloy Yeeb Nkab Flanges thiab Flange Fittings"
ASME B 1642 "Ductile Hlau Yeeb Nkab Flanges thiab Flange Fittings"
TS EN 1092 Lub voj voog flanges rau PN naj npawb ntawm cov yeeb nkab fittings, li qub thiab cov khoom siv - Ntu 1: Cov yeeb nkab flanges
IS0 7005-1 "Hlau Flanges Part 1 Steel Flanges"

