DIN17175 Heat Resisting Seamless Steel Pipe
DIN 2391-1 Cold Drawn or Cold Rolled Steel Tube
ASTM SA213 Alloy Steel Pipe
ASTM A519 Alloy Steel Pipe
ASTM A192 Steel Tubes for High pressure Steel Boiler Tube
ASTM A106 Seamless Carbon Steel Pipe
API SPEC 5L Steel Pipe Line
ASTM A333 Alloy Steel Pipe
Seamless steel tubes for high-pressure For chemical fertilizer equipments