
GALVANIZED STEEL PIPE, GALVANIZED SQUARE STEEL PIPE, GALVANIZED RECTANGULAR STEEL PIPE
Black pipe,hot-dipped galvanized welded steel pipe and seamless steel pipe under ASTM A53-1996
BS1387-1985,British Standard for welded steel pipe,or BS 21 for threaded steel pipe
Galvanized welded steel pipe under GB/T 3091-2015 for low pressure liquids delivery
