... A53GR.B: SA53B, grades, specifications:1/ 4" -28", 13.7-711.2mm 2 Seamless steel pipe for high ... A106GR.B: SA106B, grades, specifications: 1/ 4" -28", 13.7-711.2mm 3 line pipe steel API SPEC5L: ... : B GR.B, grades, specifications: 1/ 4" -28", 13.7-711.2mm The 5 heat exchanger and condenser for ... grade: St37, St44, St52, specifications: 1/ 4" -28", 13.7-711.2mm 8 Steel seamless steel pipe (heat pipe ...