Tube Weld With Reliable Performance
|
Standard |
Steel grade |
Chemical composition |
Tensile properties |
Charpy Impact Test and Drop Weight Tear Test |
||||||||||||||
| C | Si | Mn | P | S | V | Nb | Ti | CEV4)（%） | Rt0.5 Mpa Yield strength | Rm Mpa Tensile Strength | Rt0.5/ Rm | （L0=5.65 √ S0 ）Elongation A% | ||||||
| max | max | max | max | max | max | max | max | Other | max | min | max | min | max | max | min | |||
| L245MB |
0.22 |
0.45 |
1.2 |
0.025 |
0.15 |
0.05 |
0.05 |
0.04 |
1) |
0.4 |
245 |
450 |
415 |
760 |
0.93 |
22 |
Charpy impact test: Impact absorbing energy of pipe body and weld seam shall be tested as required in the original standard. For details, see the original standard. Drop weight tear test: Optional shearing area |
|
|
GB/T9711-2011（PSL2） |
L290MB |
0.22 |
0.45 |
1.3 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
1) |
0.4 |
290 |
495 |
415 |
21 |
|||
| L320MB |
0.22 |
0.45 |
1.3 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
1) |
0.41 |
320 |
500 |
430 |
21 |
||||
| L360MB |
0.22 |
0.45 |
1.4 |
0.025 |
0.015 |
1) |
0.41 |
360 |
530 |
460 |
20 |
|||||||
| L390MB |
0.22 |
0.45 |
1.4 |
0.025 |
0.15 |
1) |
0.41 |
390 |
545 |
490 |
20 |
|||||||
| L415MB |
0.12 |
0.45 |
1.6 |
0.025 |
0.015 |
1)2)3 |
0.42 |
415 |
565 |
520 |
18 |
|||||||
| L450MB |
0.12 |
0.45 |
1.6 |
0.025 |
0.015 |
1)2)3 |
0.43 |
450 |
600 |
535 |
18 |
|||||||
| L485MB |
0.12 |
0.45 |
1.7 |
0.025 |
0.015 |
1)2)3 |
0.43 |
485 |
635 |
570 |
18 |
|||||||
| L555MB |
0.12 |
0.45 |
1.85 |
0.025 |
0.015 |
1)2)3 | Negotiation |
555 |
705 |
625 |
825 |
0.95 |
18 |
|||||
| Note: | ||||||||||||||||||
| 1）0.015 ≤ Altot ＜ 0.060；N ≤ 0.012；AI—N ≥ 2—1；Cu ≤ 0.25；Ni ≤ 0.30；Cr ≤ 0.30；Mo ≤ 0.10 | ||||||||||||||||||
| 2）V+Nb+Ti ≤ 0.015% | ||||||||||||||||||
| 3）For all steel grades, Mo may ≤ 0.35%, under a contract. | ||||||||||||||||||
| 4）CEV=C+ Mn/6 + (Cr+Mo+V)/5 + (Cu+Ni)/5 | ||||||||||||||||||
Company Advantage
Our factory is located in Cangzhou, Hebei Province, and we have been at the forefront of manufacturing high-quality steel pipes since our establishment in 1993. Our factory covers an area of 350,000 square meters, with total assets of RMB 680 million, can produce 400,000 tons of spiral steel pipes per year, and has 680 skilled professionals.
Product Introduction
Our commitment to excellence is reflected in our meticulous arc welding process, which is a critical step in the manufacture of our spiral welded pipe. This technology uses high temperatures to form a strong and durable bond between pipes, ensuring that our products provide reliable performance even in the most challenging environments. Whether you are in the natural gas industry or need reliable piping solutions for other applications, our pipes will meet and exceed your expectations.
With a focus on quality and innovation, we pride ourselves on providing pipe welds that guarantee long-lasting performance. Not only are our spiral welded pipe strong and durable, they are also highly efficient, making them ideal for projects that require reliability and durability.
Main feature
One of the key features of tube welding is its reliance on arc welding, a technique that uses high temperatures to create strong, durable connections between steel tubes. The process is critical to ensuring the integrity and reliability of the final product, especially in applications where safety and performance are critical, such as natural gas transportation.
The arc welding process involves melting the edges of the pipe and fusing them together, creating a seamless connection that can withstand high pressure and extreme conditions. This method not only increases the strength of the pipe, but also extends its service life, making it the preferred choice for a variety of industrial applications.
In addition, the precision and expertise required for pipe welding also demonstrates the company's commitment to quality. By investing in advanced technology and a skilled workforce, the Cangzhou plant ensures that every spiral welded pipe meets strict industry standards, giving customers peace of mind and confidence in the product.
Product Advantage
One of the significant advantages of tube welding is its ability to produce strong joints that can withstand high pressures and extreme conditions. This is particularly important in the natural gas industry, where the integrity of the pipeline is critical. The arc welding process ensures that the tube weld is not only strong but also consistent, which reduces the risk of leaks and failures. In addition, the efficiency of tube welding allows manufacturers to quickly produce large quantities of spiral steel pipe to meet growing market demand.
Product Shortcoming
The process requires skilled workers and precise control of welding parameters to avoid defects such as porosity or lack of fusion. These issues can compromise the quality of the final product and lead to potential safety hazards.
In addition, the high temperatures of arc welding can introduce residual stresses in the material, which can affect the long-term performance of the pipeline.
FAQS
Q1:What is arc welding?
Arc welding is a technique that uses high temperatures generated by an electric arc to melt and fuse metal sheets together. For spiral welded pipe, this method is essential to create a strong connection between pipes, which is critical to the performance and life of the pipe.
Q2:Why is arc welding important for natural gas pipelines?
Natural gas pipelines must meet stringent safety and reliability standards. The arc welding process ensures that weld joints can withstand high pressures and resist corrosion, making it ideal for transporting natural gas over long distances.
Q3:Where is your company located?
Our factory is located in Cangzhou, Hebei Province, an area known for its industrial strength. Our company was established in 1993 and has grown significantly to cover an area of 350,000 square meters and employ 680 dedicated employees.
Q4:What is your production capacity?
We are proud to produce 400,000 tonnes of spiral steel pipe per year. This impressive production volume is a testament to our commitment to quality and efficiency in our manufacturing process.
