... for high temperature operation of 2ASTM A106GR.B: SA106B, grades, specifications: 1/ 4" -28", 13.7-711. ... 2mm 3 line pipe steel API SPEC5L: B specifications: 1/ 4" -28", 13.7-711.2mm 4 ... ASTM A106/ A53/ API5L: B GR.B, grades, specifications: 1/ 4" -28", 13.7-711.2mm The ... -1999, 10, 20: # #, specifications: 6-720* 1-70mm 12 High pressure boiler tube steel: GB5310-1995, 20G, specifications: ...