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Company Profile
Tianjin Xing Xin Tong Metal Technology Co., Ltd. is a brand of Xing Jian Holding Group. The group is headquartered in Beijing, the registered capital reaches to 15.6 million dollars, Tianjin Xing Xin Tong Metal Technology Co., Ltd. is professionally serves for fire fighting, gas, water supply, drainage, building structure, agricultural facilities and other fields. The main products include ERW steel pipe, hot dipped galvanized steel pipe, pre-galvanized steel pipe, hollow section, seamless pipe, SSAW steel pipe, LSAW steel pipe, steel plate & coil, pipe fittings and others. The standards we are carrying out include API 5L, ASTM A53, ASTM A106, BS 1387, BS 1139, JIS G3444, EN10219 and etc.
Why Choose Us
Our Certificate
Tianjin Xing Xin Tong Metal Technology Co., Ltd. has received certification for the ISO 9001 quality management system, ISO 14001 environmental management system, ISO 45001 occupational health and safety management system, and is recognized as an AAA credit enterprise. We also have a five-star evaluation in our commodity after-sale service system.
Professional Team
Our team members have more than 10 years of experience in this industry and can comprehensively address the challenges you encounter in various domestic and international projects. The core members of the company are part of the Steel Pipe Sub-Committee of the National Steel Standard Commission.
Our Product
Our product range includes ERW steel pipes, HDG steel pipes, pre-galvanized steel pipes, hollow sections, seamless pipes, SSAW steel pipes, LSAW steel pipes, steel plates and coils, as well as pipe fittings.
Product Application
These products are used in various applications such as firefighting, gas and oil transportation, water supply, drainage, building structures, and agricultural facilities.
LSAW Welded Steel PipeProduct Name: LSAW welded steel pipeOut Diameter: 406.4 – 1524mm (16 - 60)Thickness: 6 - 50mmLength: 6m, 12m or as per customer’s requirementPipe Ends: Plain, Beveled.
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API 5L LSAW PipeLarge steel pipe lines in leaflets plates as raw material are LSAW (Longitudinally Submerged Arc Steel Pipes), which have the steel plate in the molding machine or mould so that it comes out as a
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LSAW Line PipeSAWL pipe is also known as LSAW pipe (Longitudinal Submerged Arc-Welding Pipe). It involves taking steel plate as a raw material, molding it with a molding machine, and then welding it on both sides
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What is LSAW Steel Pip
LSAW steel pipe in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production. A wide range of the finished product specifications, weld toughness, ductility, uniformity and dense, with a large diameter, wall thickness, high pressure resistance, low-temperature corrosion resistance, etc.. Required steel pipe in the construction of high-strength, high toughness, high-quality long-distance oil and gas pipelines, mostly large diameter thick wall LSAW.
Longitudinally welded steel pipes are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances. LSAW pipes are also used in conveyance of flammable & nonflammable liquids, and as structural members in construction projects.
Benefits of LSAW Steel Pipe
Size and Range of Applications
A defining feature of LSAW steel pipes lies in their ability to be fabricated in large diameters, rendering them ideally suited for a wide array of applications. These pipes are especially favored in long-distance pipelines, such as those deployed in the oil and gas industry, owing to their efficiency and reliability in transporting substantial quantities of fluids and gases.
Strength and Durability
The Longitudinal Submerged Arc Welding process bequeaths LSAW pipes with unparalleled strength and durability. These attributes make them eminently suitable for handling high-pressure fluids and withstanding external forces during transportation and installation, ensuring the pipelines' longevity and structural integrity.
Resistance to Corrosion and External Forces
An indispensable characteristic of LSAW steel pipes is their capacity to withstand the harshest environmental conditions, including the corrosive effects of soil, water, and other chemical substances. Moreover, their robustness enables them to endure external forces such as ground movement and heavy loads, instilling confidence in their performance in diverse settings.
Cost-Effectiveness
The economic advantages of LSAW steel pipes are undeniable, resulting from their streamlined manufacturing process and the subsequent reduction in the requirement for additional joints and connections. The cost-effectiveness of LSAW pipes contributes significantly to more financially viable pipeline construction projects.
Differences Between ERW and LSAW Steel Pipe
The difference between raw materials and production capacity
The raw material of ERW steel pipe is hot rolled steel coil, and the raw material of LSAW steel pipe is hot rolled steel plate. Therefore, ERW steel pipe can realize continuous assembly line operation with high production efficiency and low production cost; while SAW steel pipe is processed by steel plate, continuous assembly line operation cannot be realized, and the production efficiency is low, and the production cost is high. ERW steel pipe is limited by the thickness of the steel coil. Generally, the maximum thickness that can be produced is 25mm, and the maximum diameter that can be produced is 660mm; while the maximum thickness that can be produced for LSAW steel pipe is 40mm, the maximum diameter that can be produced is only limited by the width of the steel plate. The maximum production diameter is 1422mm.
LSAW steel pipes can be divided into different forming methods
● UOE Steel Pipe: After The Single Steel Plate Is Pre-Bent At The Edge, It Undergoes U Forming, O Forming, Internal Welding, External Welding, Mechanical Cold Expansion And Other Processes.
● JCOE Steel Pipe: According To "J-C-O-E" Pre-Welding, Forming, And Cold Expanding After Welding
● HME Steel Pipe: It Is Formed By Mandrel Rolling Method According To "C-C-O", Welded And Then Cold-Expanded.
The difference in welding
ERW steel pipe welding does not need to add welding wire; LSAW steel pipe requires welding wire.
The difference in appearance
Both the inner and outer welds of the ERW steel pipe need to be removed, so it is beneficial to anti-corrosion; the extra height of the weld on the inner and outer walls of the LSAW steel pipe is not good for corrosion.
The difference between purchase cost and difficulty
● The purchase cost of ERW steel pipe is low, and the cost of LSAW steel pipe is very high, and the general price difference is 15%-25%.
● There are few domestic LSAW steel pipe manufacturers and it is difficult to purchase. When the diameter
Application of LSAW Steel Pipe
Oil and Gas Transmission:
LSAW pipes are widely used in the oil and gas industry for transporting crude oil, natural gas, and refined products over long distances. Their high strength and ability to withstand high-pressure environments make them suitable for this critical application.
Pipeline Construction:
LSAW pipes are often employed in the construction of pipelines for various purposes, including oil and gas transmission, water distribution, and even slurry transportation. They are known for their uniformity and reliability in conveying fluids and substances.
Water Infrastructure:
LSAW pipes are used in water supply and sewage systems, helping to transport clean water to cities and towns while also carrying away wastewater for treatment. Their durability and resistance to corrosion are valuable in these applications.
Construction and Structural Applications:
LSAW pipes can be used in the construction of various structures, such as bridges, piers, buildings, and other engineering projects where large-diameter pipes are required for load-bearing purposes.
Piling:
In civil engineering, LSAW pipes are often used as foundation piles for structures like buildings, bridges, and offshore platforms. Their ability to bear heavy loads and their resistance to external pressures make them suitable for this purpose.
Marine Applications:
LSAW pipes are used in marine environments for applications such as underwater pipelines, offshore oil rigs, and submarine cable installation due to their robustness and resistance to corrosion.
Mining:
In the mining industry, LSAW pipes can be utilized for conveying materials such as minerals, ores, and slurries. They are well-suited for applications where materials need to be transported over long distances or through challenging terrains.
Energy Sector:
LSAW pipes find application in various energy-related projects, including thermal power plants, nuclear power plants, and renewable energy installations. They are used for conveying steam, coolant, and other fluids.
LSAW Steel Pipe Manufacturing Process
Plate Probe: This is used for manufacturing the large diameter LSAW joints right after it enters the production line which is the initial full-board ultrasonic testing.
Milling: The machine used for milling does this operation through two-edged milling plate to meet the requirements of the plate width and the sides parallel to the shape and degree.
Pre-curved side: This side is achieved by using a pre-bending machine on the pre-bending plate edge. The plate edge needs to meet curvature requirement.
Forming: After the pre-bending step, in the first half of the JCO molding machine, after stamped steel, it is pressed into a “J” shape while the on the other half of the same steel plate it is bent and pressed into a “C” shape, then the final opening forms an “O” shape.
Pre-welding: This is to make a welded pipe steel a straight seam after it has been formed and then use gas welding seam (MAG) for continuous welding.
Inside weld: This is done with a tandem multi-wire submerged arc welding (about four wire) on the inner part of the straight seam welded steel pipe.
Outside Weld: Outside weld is the tandem multi-wire submerged arc welding on the outer part of the LSAW steel pipe welding.
Ultrasonic Testing: Outside and inside of the straight seam welded steel pipe and both sides of the base material are welded with 100% inspection.
X-ray inspection: X-ray industrial TV inspection is carried out on the inside and outside using image processing system to make sure there is detection sensitivity.
Expansion: This is for accomplishing submerged arc welding and straight seam steel pipe length hole diameter so as to improve the steel tube’s size precision and improve the distribution of stress in the steel tube.
Hydraulic test: This is carried out on the hydraulic test machine for steel after expanding by-root test for ensuring the steel pipe meets the standard requirements with the machine having an automatic recording and storage capabilities.
Chamfering: This involves the inspection carried out on the steel pipe at the end of the whole process.
Heat Treatment of LSAW Steel Pipe
Heat treatment of Longitudinal Submerged Arc Welding (LSAW) steel pipes is an essential process to improve the mechanical properties, remove residual stresses, and refine the microstructure of the pipes. Heat treatment can be used to achieve various goals, such as stress relief, tempering, normalization, or quenching and tempering, depending on the specific requirements of the steel and the intended application. Here's a general overview of the heat treatment process for LSAW steel pipes.
Objective: Stress relief is often performed to reduce residual stresses in the pipe, which can be introduced during the welding process. This treatment helps prevent distortion and cracking.
Procedure: The steel pipe is heated to a temperature below its critical transformation temperature but high enough to relieve the internal stresses. The temperature is typically held for a specific duration, followed by gradual cooling. The specific temperature and duration depend on the steel grade and pipe specifications.
Objective: Normalization is used to refine the microstructure and improve the mechanical properties of the steel. It involves heating the pipe to a temperature above the critical transformation temperature and then cooling it in still air.
Procedure: The steel pipe is heated to the normalizing temperature and held for a specific time to ensure uniform heating throughout the section. Afterward, it is allowed to cool in the surrounding air. Normalization results in improved strength and ductility.
Objective: Quenching and tempering are used to achieve a balance of hardness and toughness in the steel, making it suitable for applications where high mechanical strength is required.
Objective: Annealing is a heat treatment process used to soften the steel, refine the microstructure, and relieve internal stresses. It is often performed after cold working or to improve machinability.
Procedure: The steel pipe is heated to a temperature below the critical transformation temperature, held for a specific time, and then gradually cooled. Annealing results in improved ductility and ease of fabrication.
Objective: Tempering is performed after quenching to reduce the hardness and brittleness while maintaining strength and toughness.
Procedure: The steel pipe is reheated to a lower temperature and held for a specific time, followed by cooling. The specific temperature and duration are chosen to achieve the desired mechanical properties.
Our Factory
Tianjin Xing Xin Tong Metal Technology Co., Ltd. is a brand of Xing Jian Holding Group. The group is headquartered in Beijing, the registered capital reaches to 15.6 million dollars, Tianjin Xing Xin Tong Metal Technology Co., Ltd. is professionally serves for fire fighting, gas, water supply, drainage, building structure, agricultural facilities and other fields.
Our Certificate
FAQ
As one of the most professional lsaw steel pipe manufacturers and suppliers in China, we're featured by first-class material and service. Please rest assured to buy high quality lsaw steel pipe at competitive price from our factory.
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