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ዝቅተኛ የሙቀት መጠን ያለው ቧንቧ (A333 A334 Gr.6 Gr.3)
መደበኛ ASTM፣ GB/T6479-2013፣ GB/T150.2-2011፣ GB/T18984-2016 Material A333/334Gr.1፣ A333/334 Gr.3፣ A333/334 Gr.6፣ Q345B/C/D/E , 09MnD, 09MnNiD, 16MnDG.
መደበኛ ASTM፣ GB/T6479-2013፣ GB/T150.2-2011፣ GB/T18984-2016 Material A333/334Gr.1፣ A333/334 Gr.3፣ A333/334 Gr.6፣ Q345B/C/D/E , 09MnD, 09MnNiD, 16MnDG.