ASTM A333 ASTM A106/A53/API 5L GR.BX46, X52 Q345D, Q345E) 1. Diben cyffredinol dur di-dor bibell ASTM A53 GR.B, dur Rhif: SA53 B, manylebau: 1/4′-28′, 13.7-711. mm 2. Pibell ddur di-dor ASTM A106 GR.B ar gyfer gweithrediadau tymheredd uchel, rhif dur: SA106B, manyleb...
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