Overview of LSAW PipE

At UNIACERO, we pride ourselves on offering top-tier LSAW pipes, a premier choice for those in search of high-quality, durable, and efficient steel pipes. LSAW (Longitudinal double submerge arc welding) carbon steel pipes are crafted using the advanced JCOE or UOE forming technology, ensuring a robust structure and unparalleled performance. These pipes are not just any steel pipes; they are a testament to superior craftsmanship, made from steel plates hot-rolled to perfection. When you choose our LSAW pipes, you’re investing in a product that boasts a wider size range, superior longitudinal strength, and an impeccable finish. Whether it’s for oil & gas transportation or structural sections, our LSAW pipes stand out, ensuring that your projects benefit from the best in the industry.

LSAW Pipe Specifications

Our LSAW pipes come with a promise of excellence and precision. With dimensions ranging from an OD of 406 mm to 1626 mm and a thickness of 6.35 mm to 75 mm, we cater to a diverse set of requirements. These pipes undergo rigorous production procedures, adhering to international standards like API SPEC 5L, DIN, EN, ASTM, and GOST. We offer a variety of steel grades, ensuring that the product aligns with your specific needs. Furthermore, our LSAW pipes come with options for surface coatings, diverse end types, joint methods, and specialized machining services. When you opt for UNIACERO’s LSAW pipes, you’re choosing precision, versatility, and a commitment to quality.

Production ProcessLSAW PIPE
Outside Diameter219.1mm – 1626mm(8″ – 64″)
Wall Thickness6mm – 75mm
Pipe Length3- 18 meters
Production StandardsAPI 5LDIN17100ASTM A252
EN10025JIS G3101AWWA C200 – 97
Corrosion PreventionLacquer, Varnish, Oiling, HDG, Pre-Galvanizing
End ProcessesSquare Cut, Bevelling, Threading, Grooving
Joint MethodFitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding
Product UsagePetroleum, Liquid & Gas Transmission, Structure, Piling Job, Mining, Agriculture, Fabrication, Fire Fighting, Heat Exchanging

Where Are LSAW Pipes Used?

With UNIACERO’s LSAW pipes, the possibilities are endless. These pipes are the backbone of numerous industries, playing a pivotal role in the transportation of oil & gas, serving as robust pipe piles, and acting as integral structural sections in construction projects. Their durability and strength make them ideal for long-distance transmission pipelines, ensuring that hydrocarbons are transported efficiently and safely. Whether you’re in the petrochemical sector, civil construction, or light industry, our LSAW pipes promise to elevate the efficiency and safety of your operations. Trust in UNIACERO, and let our products pave the way for your success.

Oil & Gas


Water Transmission

Piling Work

Mechanical Engineering

Steel Fabrication

How is LSAW pipe made in the UOE Method?

The manufacturing journey of our LSAW pipes is a blend of cutting-edge technology and meticulous attention to detail. The process begins with the UOE and JCOE forming methods. In the UOE method, steel plates undergo pre-bending, U forming, and O forming, using dedicated forming presses. This sequential deformation transforms the steel plate into a circular tube. On the other hand, the JCOE method involves a series of stamping steps, where the steel plate is shaped into “J”, “C”, and “O” forms, resulting in an open “0”-shaped tube blank. At UNIACERO, every step is monitored closely, ensuring that the final product stands as a testament to our commitment to excellence.


How is LSAW pipe made in the JCOE Method?

The JCOE method of producing LSAW pipes is a testament to precision engineering. At UNIACERO, the process begins with stamping on the JC0 forming machine. The steel plate is first pressed into a “J” shape, followed by forming a “C” shape, and finally, pressure is applied from the middle to create an open “0”-shaped tube blank. This intricate process ensures that each pipe is crafted to perfection, offering unparalleled strength and durability. When you choose our LSAW pipes made using the JCOE method, you’re opting for a product that embodies excellence in every curve and weld.


How is LSAW pipe made in the UOE method?

The UOE method for crafting LSAW pipes is another feather in UNIACERO’s cap. This process emphasizes the UOE LSAW pipe forming technique, where steel plates undergo pre-bending, U forming, and O forming. Each of these stages is executed using dedicated forming presses. The result is a steel plate deformed into a circular tube, with each bend and curve reflecting our commitment to quality. By choosing our LSAW pipes made using the UOE method, you’re investing in a product that is the culmination of advanced technology and meticulous craftsmanship.


What is the difference between LSAW pipe and SSAW pipe?

When it comes to choosing between SSAW and LSAW pipes, it’s essential to understand their distinct characteristics. LSAW pipes, which we proudly specialize in, offer a slight edge over SSAW pipes in several areas. Firstly, LSAW pipes have lesser residual stress, ensuring a more stable structure. The heat-affected zone in LSAW pipes is smaller, reducing potential weak points. In terms of accuracy, LSAW pipes excel, making installation a breeze. Moreover, the welding line of LSAW pipes is about 60% less than that of SSAW pipes, and their quality can be non-destructively tested. At UNIACERO, we prioritize your needs, ensuring that our LSAW pipes offer you the best in terms of quality, durability, and efficiency.



our clients

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

Related Products



Our seamless pipes Range in sizes from 1/8 inches to 36 inches, they are produced using high-quality carbon or alloy steel.


ERW Pipe

Our carbon steel EAW pipe with an O.D. ranging from 21.3mm to 660mm and W.T. between 1.0mm to 20mm.



The dimensions of our SSAW steel pipes range typically from 20 inches to 80 inches (406mm to 2032mm) in diameter.



With dimensions ranging from an OD of 406 mm to 1626 mm and a thickness of 6.35 mm to 75 mm, our LSAW pipes cater to a diverse set of requirements.