Q235a, q235b, 10, 20, Q345 (16mn),

L245 (B), L290 (x42), l320 (x46), L360 (x52), L390 (x56), L415 (x60), L450 (x65), l485 (x70), l555 (x80)

L290nb / MB (x42n / M), l360nb / MB (x52n / M), l390nb / MB (x56n / M), l415nb / MB (x60n / M), l450mb MB (x65), l485mb (x70), l555mb (x80) spiral steel pipe is mainly used in tap water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction, which is one of the 20 key products developed in China.

:: Water supply and drainage for liquid transportation, gas, steam and liquefied petroleum gas for gas transportation, pile driving pipes and bridges for structures, pipes for wharfs, roads and buildings, etc.