... ,STC,BTC,VAM,EUE,NUE,PASTM A500 Gr. A,B,C,DASTM A53 Gr. A,B ASTM A106 Gr. A,B,CASTM A335 Gr. P1,P2,P5,P9,P11,P12,P15 ... ,P21P22,P91,P92ASTM A199 Gr. T4,T5,T7,T9 ... . Electric pwer as well as boilerHigh-pressureboiler pipe20G,A106,ST 45 GB5310-95ASTM A 106-99DIN17175-7914-630*2-80Temperature-resistantseamless steel pipefar ...