ASTM A213 T91 T11 T22 T5 alloy steel pipe 2.ocean and railway transport 3.API/ ... the buyers' requirement Product CategoryMaterialStandardSpecificationApplication Alloy Steel TubeCr5Mo.(P5.STFA25.T5)15CrMo(P11,P12,STFA22)13CrMo4412Cr1MoVP22(10CrMo910)T91,P91,P9,T9WB36GB5310 ... , boiler and superheater of shipbuilding ASTM A213 T91 T11 T22 T5 ALLOY STEEL PIPE