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 are steel pipes used in the construction of telecommunications towers?: Steel pipes are commonly used in the construction of telecommunications towers as they provide a strong and durable framework for supporting the tower structure. These pipes are used to create the main mast or tower structure, providing stability and strength to withstand various weather conditions. Additionally, steel pipes are often used for mounting antennas and other equipment on the tower, ensuring secure installation and efficient signal transmission.

Q: Can steel pipes be used for steam applications?: Yes, steel pipes can be used for steam applications. Steel is a widely used material in steam systems due to its high strength, durability, and resistance to high temperatures and pressure. It is commonly used in industries such as power generation, refineries, and petrochemical plants for carrying and distributing steam. However, it is important to ensure that the steel pipes are properly designed, installed, and maintained to withstand the specific conditions and requirements of steam applications.

Q: How do steel pipes perform in extreme weather conditions?: Steel pipes perform well in extreme weather conditions due to their high strength, durability, and resistance to corrosion. They can withstand extreme temperatures, heavy winds, and harsh climates, making them a reliable choice for various industries and applications.

Q: Seamless steel tube 89X4 meters, how heavy?: The theoretical weight calculation formula of plain carbon steel and alloy steel seamless pipe:W=0.02466 (D-S) S, the density of steel fand 7.85kg/dmNote: weight per meter kg/m= (outer diameter wall thickness) * wall thickness *0.02466 units, mm: mmFor example, the seamless steel pipe with a diameter of 89*4 weight per meter:(89-4) *4*0.02466=8.384 kg / M.

Q: How are steel pipes used in the agriculture industry?: Steel pipes are used in various ways within the agriculture industry. They are commonly used for irrigation systems, allowing water to be efficiently transported to crops. Steel pipes are also used for drainage systems, ensuring excess water is properly removed from fields. Additionally, steel pipes are used for building structures such as barns, fences, and animal enclosures, providing durability and strength.

Q: How do you protect steel pipes from fire?: There are several measures available to protect steel pipes from fire. One commonly used approach involves applying fire-resistant coatings or paints to the surface of the pipes. These coatings or paints are specifically designed to endure high temperatures and create a barrier that prevents heat from reaching the steel. Another effective method is to wrap the steel pipes with fire-resistant insulation materials. These materials serve as a buffer, reducing heat transfer and slowing down the spread of fire. Mineral wool or ceramic fiber blankets are commonly utilized for this purpose. It is also crucial to ensure proper installation and support for the steel pipes. This includes maintaining adequate clearance from other flammable substances and avoiding overcrowding or obstructions that could hinder the flow of air around the pipes. Sufficient spacing between pipes is also essential to prevent heat transfer between them. Moreover, incorporating firestop systems is recommended when steel pipes pass through fire-rated walls or floors. These systems consist of fire-resistant materials and seals that prevent the spread of fire and smoke through openings or penetrations in fire-rated barriers. Regular maintenance and inspections are essential to uphold the ongoing effectiveness of the fire protection measures. Any damage or deterioration of the coatings, insulation, or firestop systems should be promptly addressed to maintain the fire resistance of the steel pipes. In conclusion, a combination of fire-resistant coatings, insulation, proper installation, and maintenance practices is imperative for safeguarding steel pipes against fire hazards. These measures play a crucial role in minimizing the risk of fire-related damage and ensuring the safety of both the pipes and the surrounding environment.

Q: What are the common methods for inspecting the integrity of steel pipes?: To inspect the integrity of steel pipes, various methods are employed. These methods play a vital role in identifying any faults or weaknesses in the pipes that could jeopardize their structural soundness and potentially result in failures or leaks. 1. Visual Inspection: This method involves a visual examination of the external surface of the steel pipe by an inspector. The purpose is to spot any signs of damage, such as corrosion, cracks, or deformities. Although it is a quick and cost-effective approach, it may not be sufficient to detect internal defects. 2. Ultrasonic Testing (UT): UT is a non-destructive testing method that utilizes high-frequency sound waves to identify flaws in steel pipes. A transducer emits ultrasonic waves into the pipe, and any waves that bounce back are analyzed to detect defects like cracks or voids. UT is effective for inspecting both the internal and external aspects of the pipe and can provide precise measurements of defect size and location. 3. Magnetic Particle Inspection (MPI): MPI is primarily employed to detect surface or nearby surface defects in ferromagnetic materials like steel. Magnetic particles are applied to the pipe's surface, and if there is a defect, these particles will gather around it, creating a visible indication. MPI is particularly useful in identifying cracks and other discontinuities that may not be easily visible to the naked eye. 4. Radiographic Testing (RT): RT involves the use of X-rays or gamma rays to examine the internal structure of steel pipes. These rays pass through the material, and an image is recorded on a radiographic film or a digital detector. This method is effective in detecting internal defects such as cracks, voids, or inclusions. However, it necessitates proper safety measures due to the use of radiation. 5. Eddy Current Testing (ECT): ECT is a non-destructive testing method that relies on electromagnetic induction to assess the integrity of steel pipes. An alternating current is passed through a probe, generating an electromagnetic field. Any alterations in the material's electrical conductivity or magnetic permeability caused by defects are detected by the probe, providing information about the pipe's condition. These represent some of the commonly used techniques for inspecting the integrity of steel pipes. Each method possesses its own advantages and limitations, and the choice of inspection method depends on factors such as the type of defect to be identified, access to the pipe, and budgetary considerations. Regular inspection and maintenance using these methods are crucial to ensure the secure and dependable operation of steel pipe systems.

Q: How are steel pipes used in the renewable energy industry?: Steel pipes are commonly used in the renewable energy industry for various applications. They are used to transport fluids, such as water or steam, in geothermal power plants. Steel pipes are also used in solar thermal power plants for transferring heat transfer fluids. Additionally, steel pipes are utilized in the construction of wind turbine towers, providing structural support for the turbines. Overall, steel pipes play a vital role in the renewable energy industry by facilitating the efficient and reliable operation of different renewable energy technologies.

Q: Can steel pipes be used for high-temperature applications?: Yes, steel pipes can be used for high-temperature applications. Steel is known for its excellent strength and durability, making it suitable for handling high temperatures. However, the specific grade of steel used and the operating conditions must be considered to ensure it can withstand the desired temperature range without compromising its structural integrity.

Q: Are steel pipes suitable for conveying fluids?: Yes, steel pipes are suitable for conveying fluids. Steel pipes have been widely used in various industries for many years due to their durability, strength, and resistance to corrosion. These qualities make steel pipes an ideal choice for conveying fluids such as water, oil, gas, and even hazardous chemicals. The smooth interior surface of steel pipes also allows for efficient flow and prevents clogging, making them suitable for applications that require a continuous and smooth flow of fluids. Furthermore, steel pipes can withstand high pressure and temperature conditions, making them suitable for both high and low-pressure fluid transmission systems. Overall, steel pipes are a reliable and efficient option for conveying fluids in a wide range of industries, including oil and gas, water treatment, chemical processing, and many more.

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