Carbon steel pipe/tube :
Standard:API 5CT,API 5L,ASTM A53,A500, ASTM A252,DIN 1626,ISO559 etc
Material:Gr.A,Gr.B,X42,X52,X65,X70,St37,St52 etc
Stainless steel pipe/tube:
Standards:ASTM A554, A249, A269, A312, A213,ASTM A270,DIN 11850,etc
Material:304,304L,316,316L,201,202,409L,430,etc