... boilers, Features: 1) Executive standard: contract required, ASTM A213, A199 A335 (ASME SA213, SA199 SA335)2) ... ; 2-4mm, OD: 10-65mm; 1-7mm3) Steel kind / steel grade: 15Cr, 20Cr, SCM 415H T5, T11, T22 ... , P11, P22, P91) Product name: ASTM A213 seamless alloy steel pipePlace of Origin: China Grade:T2 T5 T11 ... sch20,sch30,std,sch40s,sch40,sch60,xs,sch80s,sch80,sch100,sch120,sch140,sch160,xxsLength: the max ...