API Standard Oil and Gas Well Casing Tube K55

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1000 m.t.
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20000 m.t./month

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Item specifice:

Standard: API Technique: Hot Rolled Shape: Round
Surface Treatment: Black Steel Grade: Q195 Certification: API
Thickness: 5.21 - 16.13 mm Length: 6M Net Weight: 9.5

Product Description:

casing pipe for oilfield

API 5CT Q125 Casing Pipe|Olifield Casing Pipe

roduct: API 5CT oil casing pipe

Grade: Q125-1,Q125-2,Q125-3,Q125-4.


OD: 114.3mm to 508mm

Wall thickness: 5.12mm to 16.13mm

Length: R1(4.86-7.62M). R2(7.62-10.36M). R3(10.36-13Meters)


Standard: API 5CT

Technical: Hot Rolled

Type: Seamless alloy API pipe

Surface treatment: blank oil painting+green/red/white/brown painting

Packing: Coating and steel thread protector,3tons in a bundle packed by steel strip

Third party inspection: BV|SGS|TUV

Usage:  oil pipeline, oil natural gas, industrial gas, water transportation

API 5CT,Russian Certificate,ISO,CCS




Physical properties are checked and each length hydrostatically tested, normally to only 3,000 psi in the plain end (unthreaded) condition. The following are also checked:

  • Dimensions

  • Weights

  • Straightness

  • Lengths

Part of this inspection is to drift all lengths.
Despite all the American Petroleum Institute (API) specifications and testing, some tubing defects are still found after delivery; thus, some operators do further inspection.

Inspection Method

  • Size and surface inspection

  • NDT and pressure test and third party certication

  • Hydrostatic

  • Drifting test

  • Physical and chemicail analysis

  • Hardness and pressure test.

  • Electromagnetic

  • Magnetic particle

  • Ultrasonic

  • Out DiameterweightGradeThreadLength
    4-1/2"114.314.14-22.479.5-15.10      Q125-1,Q125-2,Q125-3,Q125-4STC/LTC/BTC/XCR1/R2/R3
    6 5/8"168.2829.76-47.6220-32Q125-1,Q125-2,Q125-3,Q125-4STC/LTC/BTC/XCR1/R2/R3
    1 R1:  4.86M-7.62M   R2: 7.62M-1036M  R3:10.36M-12M
    2  Standard: API 5CT
    3 Grade: H40/J55/K55/N80/C75/L80/C90/T95/P110/Q125

    Our service:  

    1): Durable, strict quality management and control, production follow the ISO.
    2): Advanced precision casing pipe equipment to guarantee prime quality.
    3): Casing pipe with smooth surface. No defects. Continuous skill  improvements.
    4): Short delivery, competitive good offer. Casing pipe MOQ is low.
    5): Third party Inspection for casing pipe can be TUV/SGS/BV

    6): Company design team always think how develop new skill and new products to meet requirements of markets.
    7): Good service, IF customers have any  problem during application, we will surely try our best to solve them.
    8): Regular thread is STC/LTC/BTC or as client's requirement.

    9): Surface treatment can be painted, or based on the requirements of customers.

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Q:The difference between carbon and welded steel tubes
Quality solutionsThe carbon steels we usually refer to include carbon structural steels and carbon tool steelsThe common steel pipe is divided into two kinds: seamless steel pipe and welded steel pipe. The welded pipe of small size is straight welded, and the big size steel pipe is usually spiral welded
Q:Seamless steel pipe and welded pipe what is the difference?
Seamless steel pipe is made of solid round tubes and perforated without gaps. The welded pipe is made of steel or strip after welding and has a slit. Generally seamless pipe can be greater pressure on the city.
Q:What is the weight of hot galvanized steel tubes? DN150 4mm wall thickness
DN150 4mm wall thickness welded steel pipe theoretical weight is 16.21kg/m, galvanized steel pipe should be multiplied by the weight coefficient after galvanizing, C, DN150, wall thickness of 4mm, C=1.032, DN150, theoretical weight and wall thickness of 4mm galvanized steel is 1.02*16.21=16.7287kg/m = 16.73kg/m.
Q:Outside diameter 60, thickness 3.5 seamless steel tube, how many kilograms per meter?
Steel tube Kg/m (including seamless steel tubes and welded tubes) theoretical formula per meter weight: W=0.02466 * S * (D-S)Of which: S - wall thickness (mm), D - steel tube diameter (mm), W - kg / M
Q:Welded and seamless steel pipe how to distinguish?
Different uses:Mainly used for seamless pipe or structural parts of the transmission fluid, mainly used in machinery industry, and seamed steel pipe is mainly used in the construction industry, such as water, gas, compressed air and low pressure fluid. But seamless steel tubes are used in all pressure pipes.
Q:What is DN50 for welded pipe?
Refers to the use of welded steel pipe made of DN50 steel pipe, refers to the inside diameter is 50mm, the market of common DN50 pipe also refers to the 2 inch pipe, standard pipe: 3.5mm thickness, pipe diameter 60mm, the weight of 4.88kg/m theory. DN50 seamless steel pipe, commonly used in the market, has two specifications: 57mm, 60mm, and if no special instructions, 57mm is commonly used. The outer diameter of the welded pipe is only 60mm this specification.
Q:What quota should be installed for heating seamless steel pipe?
Should be in low carbon steel welding installation set industrial pipeline engineering quota, material to input the name and type of seamless steel pipe specifications and price; according to the description of the contents of related items can be set.
Q:How to make the steel pipe spray paint is not easy to fall off?
First you will rust steel, to clean, good quality alkyd rustproof paint, completely dry after brushing paint, color to see his kind of love.
Q:Seamless steel tube 89X4 meters, how heavy?
According to the theory, each meter is 8.3844 kilograms. If you want to be precise, you'll lose your own weight.
Q:Seamless steel tube DN15 specification phi 18*3 what do you mean?
Seamless steel pipe DN15 specification phi 18*3 refers to 3 outer diameter of 18mm B type DN15 seamless steel tube.

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