product description
1)Sizes (O.D. x W.T): 17.15mm-323.95mm X 2.31--31.75mm
2)Standard: API SPEC 5L
3)Steel Grade: Gr.B,X42,X52,X56,X60,X65,x70
4)Surface: oiled or black painted to prevent rust
5)Marking:according to customer's requirement
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