Type	Application	STANDARD	MATERIAL
Alloy steel	petroleum, chemical industry, electricity, boilerindustry for high temperature resistant, low temperature resistance,Corrosion resistance	ASTM SA335	A335,P22,    P9,eg
Stainless steel	oil, aviation, metallurgy, food, water conservancy,                          electric power, chemical industry,Chemical, , pharmaceutical machinery, etc	ASTM A213 ASTM A312	304(L),316(L)
Mild steel	45 ℃ ~ 195 ℃ level-low temperature and low pressure vessel pipe heat exchanger pipe	ASTM A333	A333 GR6
High pressure boiler tube	manufacturing by high pressure boiler tube, the collection box, steam pipe, etc	ASTM SA106	A106 GRB
SMLS steel liquid service	transmission fluid general seamless steel tube	ASTM A106 ASTM A53	A53 B A106 B
general structure Tube	general structure, engineering scaffolds,mechanical   processing,etc	ASTM A53	A53 B
Line pipe	oil and natural gas industry, the oxygen in the water, the oil pipe	API 5L	A,B,X42,X46,  X52,X56,X60,eg
Straighe seem steel pipe	general structure stents, low voltage liquid transportation, etc	GB/T13793-1992 GB3091-2001	Q235B Q345B
Spiral steel pipe	low voltage liquid transportation with steel pipes	SY/T5037-2000	Q235B Q345B