Tianjin Longkailai Oil Tubing: Competitive Pricing, Versatile Applications

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1 m.t.

Supply Capability:: 1200 m.t./month

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API 5CT J55/N80/P110 OCTG Casing & Tubing Manufacturer Direct‌

‌Comprehensive OCTG Solutions for Every Well Profile‌

As an API-licensed manufacturer, we eliminate intermediaries to deliver J55/N80/P110 casing and tubing with 15% cost savings. Our vertically integrated production process ensures full traceability from steel billet to finished product.

‌Technical Specifications‌

‌Material Science‌:

J55: 0.45% Mn, 0.25% C composition for shallow wells (≤8,000ft TVD)
N80: Quenched & tempered microstructure withstands 12,000psi collapse pressure
P110: 110ksi SMYS with Charpy V-notch impact ≥45J at -20°C

‌Threading Technology‌:

CNC-machined API LTC/BTC threads with ±0.003" pitch diameter tolerance
Optional VAM TOP connections for HPHT wells

‌Quality Assurance‌:

100% ultrasonic testing (UT) for laminations
Hydrostatic tested to 80% of yield strength

‌Applications‌

J55: Water injection wells, surface casing
N80: Intermediate casing in sour gas fields
P110: Production casing in 15,000psi reservoirs

‌Case Study‌

A Permian Basin operator reduced casing costs by 18% using our direct-shipment P110 casing for 35 horizontal wells, achieving 95% torque-turn compliance during running

Q: How to make the magnetic steel, can be like a magnet?: Magnetization. Winding the insulated wire on the object, passing in the direct current, and taking it down after a period of time.

Q: How are steel pipes measured and labeled?: Steel pipes are typically measured and labeled based on their outside diameter (OD) and wall thickness. The measurement is usually expressed in millimeters or inches. The label includes these dimensions, such as "2-inch OD, 1/8-inch wall thickness." Additionally, the length of the pipe may also be included in the labeling, ranging from standard lengths like 6 meters or 20 feet.

Q: How are steel pipes used in the manufacturing of pressure vessels?: Steel pipes are commonly used in the manufacturing of pressure vessels due to their high strength and ability to withstand high pressure. These pipes are utilized as the primary material for constructing the shell of the pressure vessel, providing a robust and reliable structure. Additionally, steel pipes offer excellent resistance to corrosion, making them suitable for various industries and applications where pressure vessels are required, such as oil and gas, chemical processing, and power generation.

Q: Theoretical weight of 25*25*1.5 square steel tubes: Theoretical weight can be directly from the steel tube under the table look up, you can also press type calculation:Weight per meter =4x, wall thickness x (side length - wall thickness) x0.00785. The length of the square tube and the wall thickness are in millimeters, and the weight of each square meter is in kilograms.

Q: How are steel pipes protected during transportation?: To ensure the safety and integrity of steel pipes during transportation, various measures are taken. One effective approach involves applying protective coatings to the pipes' exteriors. These coatings, such as epoxy or polyethylene, act as barriers against moisture, corrosion, and physical damage. Additionally, bundling the pipes together and securing them with strapping or bands prevents movement and potential collisions while in transit. To provide extra protection against impact and handling, wooden crates or containers may also be used. Furthermore, careful loading and unloading procedures are followed to minimize stress or strain on the pipes. By implementing these protective measures, steel pipes can safely reach their destination without compromising their quality or structural integrity.

Q: What are the different methods of joining steel pipes together?: There are several methods of joining steel pipes together, including welding, threading, flange connection, and mechanical coupling.

Q: How are steel pipes used in the manufacturing of wind turbines?: Steel pipes are used in the manufacturing of wind turbines primarily for constructing the tower, which provides structural support and stability to the turbine. These steel pipes are typically large in diameter to withstand the strong winds and carry the weight of the turbine components. Additionally, steel pipes are also utilized for the transmission of electrical cables within the turbine, ensuring efficient power generation.

Q: How do you prevent steel pipes from freezing in cold climates?: To prevent steel pipes from freezing in cold climates, it is important to insulate the pipes properly. This can be done by wrapping them with insulation sleeves or foam, which helps to retain heat and prevent rapid temperature changes. Additionally, ensuring that there is proper ventilation in the area where the pipes are located can help to maintain a higher temperature and prevent freezing.

Q: Are steel pipes suitable for conveying fluids?: Yes, steel pipes are suitable for conveying fluids. They are widely used in various industries for transporting liquids and gases due to their high strength, durability, and resistance to corrosion.

Q: What is the role of steel pipes in the construction of bridges?: Steel pipes play a crucial role in the construction of bridges as they are used for various purposes such as supporting the weight of the bridge, providing structural integrity, and allowing for the flow of fluids or gases. Steel pipes are often used as support columns or piles in bridge foundations, providing stability and strength to the structure. They are also used for constructing bridge piers, trusses, and beams, ensuring the bridge can withstand heavy loads and forces. Additionally, steel pipes can be utilized for the transportation of water, gas, or other fluids across the bridge, making them essential for the overall functionality and longevity of the bridge.

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