cuixiaoxia0104(at)gmail(dot)comcui.xiaoxia(at)hotmail(dot)comProducts Description: Black Steel Pipe1) Material of weld steel pipe: Q195, Q215, Q235, Q345, X52, X60 STK500, or per the buyersdemand.
2) Standards: BS1387, ASTM A or B, GB-T3081, GB-T9711, API 5L, API 5CT
3) ...
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