API 5L GR.B/ASTM A53 GR.B, CARBON FERRUM, LSAW FERRUM PIPIS FOB TIANJIN Extra diametrum (mm) USD/TON 406 457 508 609.6 711.1 762 812 863.6 Wall 8 668 668 674 662 667 662 667 667 667 Creber 9.53 636 655 662 642 647 642 647 647 壁厚 (mm) 10 636 623 629 642 647 642 647 647 XII.
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