china market prepainted steel coil cold rolled ral

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Ministry of Commerce of the P.R.China - China Commodity Net

Casing is a large-diameter pipe that serves as the structural retainer for the walls of oil and gas wells, or well bore. It is inserted into a well bore and cemented in place to protect both subsurface formations and the wellbore from collapsing and to allow drilling fluid to circulate and extraction to take place.

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Ministry of Commerce of the P.R.China - China Commodity Net

Tubing is pipe used for the transportation of crude oil and natural gas from an oil or gas layer to the surface after drilling is complete. It is made to withstand the pressure generated from the extraction process. ... API 5L, ASTM A53,GB/T 3091, GB/T 9711, IS 3589, IS 1978, EN 10220, EN 10255, EN 10217 Steel Grade ASTM A 53 Gr. A, Gr B, Gr ...

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