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 wells
API 5CT CASING AND TUBING
BS EN ISO 11960 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells
NF M87-207 Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells
JIS G3439 SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPE
IS : 4270 Steel tubes for well spainend casing pipes

Steel Grade: H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, Q-125

Process: ERW and Seamless

Size:

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 thread

Length:

                                  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              10.36-14.63m

3) Drill Pipe

    OD:  2 3/8" -  5 1/2"

    WT:  0.280" - 0.449"

Note: EU: External upset, IEU: Internal & External upset

Thread of tool joint are right-hand or left hand

Thread are copper- plated or phoshphated

Connection: 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 paint
Heat treatment: Normalized, Quencher + Temper

Packing: 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.

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  Transportation

  Predominant geological location, 160 kilometers from XINGANG port

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  Strict Quality Control

  From the raw material control to the finished products, the whole process be managed accroding to ISO 9000 quality management system and the material standard, also to be inspected by our QC strictly

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  Raw Material

  Based on strong financial support, purchase the huge quantity raw material to ensure continuous production.

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  Professional Team

  Effective and professional Team, provide the best services & solution to ship the goods successfully

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  Government Support

  As a leading manufacturer and the first major taxpayer in local market, Government give great support to Huayang

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  Fast Delivery

  HY production lines pass Environmental Assessment, keep 30,000 Tons stock per month,and enough raw material stock for the common steel grade,and numerous production lines

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  Advanced Production Line

  Advanced imported production equipment;German once-through rolling machines; British CT METORI digital controllers; JCOE Forming Machine from Taiyuan Heavy Industry