1.Standard:

ASTM A335 Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
A213 Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes  
GB5310 Seamless Steel Pipe For High Pressure Boiler
  GB6479 High Pressure Seamless Pipe For Chemical Fertilizer Equipment  
GB9948 Seamless steel tube for petroleum cracking Tube  
JIS G3458 Alloy Steel Pipes (STPA 12/ 20/ 22/ 23/ 24/ 25/ 26)  
JIS G3462 Alloy Steel for Boiler and Heat Exchanger Tubes (STBA12/ 13/ 20/ 22)  
JIS G3467 Steel Tubes for Fired Heater (STF 410/STFA 12/ 22/ 23/ 24/ 25/ 26)  
2. Grade: P5(T5),P11(T11),P22(T22),P91(T91)
3. Size: From 1/4" to 24",
4. OD From 13.7 mm to 609.6 mm
5. Wall Thickness: SCH40 to SCH160, XXS (1mm-80mm)
6. Length: 5 m to 12 mtrs

ASME/ ASTM A335 P5/ A213 T5 / Cr5Mo (STFA25 STPA25 STBA25)
ASME/ ASTM A335 P12/ A213 T12 / 15CrMo (STFA22 STPA22 STBA22 T12 P12)
ASME/ ASTM A335 P11/ A213 T11 / 1.25Cr0.5Mo (STFA23 STPA23 STBA23 T11 P11)
ASME/ ASTM A335 P9/ A213 T9 / Cr9Mo (STFA26 STPA26 STBA26 T9 P9)
ASME/ ASTM A335 P22/ A213 T22 / 12Cr2Mo (10CrMo910 T22 P22)
ASME/ ASTM A335 P921 A213 T91 / 10Cr9Mo1VNb T91 (P91)