Usage: Tube for conveying gas, water, and oil in both and natural gas industries etc. Casing: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. Steel Casing Pipes have smooth wall & minimum yield strength of 35,000 PSI. Tubing: 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. Tubing is manufactured in the same way as casing, except that an additional process known as "upsetting" is applied to thicken the pipes.Quality Standard:SY/T 6194 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wellsAPI 5CT CASING AND TUBINGBS EN ISO 11960 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wellsNF M87-207 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wellsJIS G3439 SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPEIS : 4270Steel tubes for well spainend casing pipesSteel Grade:H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, Q-125Process: ERW and SeamlessSize:1) Tubing OD: 2 3/8" -- 4 1/2" WT: 0.167" -- 0.630"Note: P : Plain end, N: Non upset, U: External upset, T&C: Threaded and coupled.2) Casing OD: 2 3/8” -- 20" WT: 0.205"-- 0.5"Note: P: Plain end, S: Short round thread, L: Long round threadLength: R1 R2 R3 Tubing 6.10 -7.32m 8.53-9.75m 11.58-12.80m Casing 4.88 - 7.62m 7.62-10.36m 10.36-14.63m3) Drill Pipe OD: 2 3/8" - 5 1/2" WT: 0.280" - 0.449"Note: EU: External upset, IEU: Internal & External upsetThread of tool joint are right-hand or left handThread are copper- plated or phoshphatedConnection: Casing: LTC, STC, BTC, VAM. Tubing: NUE, EUE.End: Beveled, Square cut. And pipe protection cap specially for casing and tubing.Surface: Corrosion proofing water based paintHeat treatment: Normalized, Quencher+TemperPacking: The casing pipe will be packed into bundles as 3x3, 3x4, 4x4 etc. and loading into containers after black painting and thread protectors installation.Test:Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection, Nondestructive Test (Ultrasonic flaw detector, Eddy current flaw detector), Hydrostatic Test.