high pressure temperature steel tube ASTM A335 P1,P5,P9,P11,P22,P91,P92 ASTM ... A213 T1,T5,T9,T11,T22,T91 CR5MO,CR9MO,10CRMO910 high pressure ... Pipe For High Pressure BoilerGB6479High Pressure Seamless Pipe For Chemical Fertilizer EquipmentGB9948Seamless steel tube for petroleum cracking TubeASTM A213 Seamless Ferritic and Austenitic Alloy-Steel ...