Line pipe
（1）API SPEC 5L PSL1 /PSL2 （2）Conveying of gas，water and oil in petroleum and natural gas industries （3）PSL1/PSL2 L245B or X42、L320B or X46 and so on
Boiler tube
（1）ASTM A106/A179/A192A/A210/A213/A312/A335/A376 （2）For heat-exchange tubes、steaming tubes （3）EN 10216-1/10216-2/10216-3/10216-5 and so on
Casing and tubing
（1）API Spec 5CT （2）Oil and Gas Industry （3）H40、J55、K55、N80、N80 and so on
Mechanical tube
（1）ASTM A519. EN10210.EN10297. DIN2391.JIS G3441. JIS G3445.JIS G3465 （2）Mechanical processing for cylinder and struction. （3）S355/E355/P355/1010/1020/1045/4130 and so on
