Casing
Standard：API SPEC 5CT Standard.
Use: Seamless steel tubes for oil casing and tubing in oil and gas well. Casing pipe is the steel pipe to support the wall of oil and gas wells, divided into surface casing, protective casing and production casing.
Steel grade: J55, K55, N80, L80, C90, T95, P110, Q125
Size: 4 1/2”~20” for Seamless Casing
Length: R1/R2/R3
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