E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
E-mail: authentic013@steelpipes-fitting.com
WhatsApp: +86 13668807131
Oct. 09, 2024
Straight seam welded steel pipes can be categorized primarily into two types based on their welding processes:
High-Frequency Resistance Welding (ERW) and Submerged Arc Welding (SAWL). Each method has distinct characteristics, applications, and advantages.
High-Frequency Resistance Welding (ERW)
Process Characteristics:
Welding Method: ERW involves cold forming a steel plate into a cylindrical shape and then applying high-frequency
electric current to the edges to induce heat, causing them to fuse without the addition of filler material.
This results in a weld that retains the chemical properties of the base material due to recrystallization during the process
Mechanical Properties: The absence of additional welding materials and the controlled heat application lead to improved mechanical properties,
including high strength and toughness, making ERW pipes suitable for various engineering applications
Applications:
Usage: ERW pipes are commonly used for transporting natural gas, crude oil, refined oil, and pulp over long distances on land.
Their high production efficiency and lower costs make them popular in these applications
Production Efficiency:
Material Source: The raw material for ERW pipes is hot-rolled steel coils,
allowing for continuous assembly line operations that enhance production efficiency while keeping costs low.
Submerged Arc Welding (SAWL)
Process Characteristics:
Welding Method: SAWL employs a submerged arc welding technique where multiple wires are used to create the weld.
This method minimizes heat input, reducing the impact on the heat-affected zone of the parent material.
The process often includes a cold expanding technique that enhances dimensional precision and reduces internal stress.
Mechanical Properties: The multiple wire welding technique allows for better control over the welding process,
which contributes to improved mechanical properties of the finished product.
Additionally, ultrasonic flaw detection ensures that the pipes meet stringent quality standards required for high-pressure applications
Applications:
Usage: SAWL pipes are primarily used in high-voltage underwater pipelines and in challenging
environments such as mountainous regions or areas with extreme conditions. Their superior performance characteristics make them ideal for such demanding applications
Production Efficiency:
Material Source: Unlike ERW, SAWL pipes are produced from hot-rolled steel plates, which leads to higher production costs and lower efficiency compared to ERW processes.
Conclusion
Both ERW and SAWL steel pipes serve crucial roles in various industrial applications.
ERW is favored for its cost-effectiveness and efficiency in land-based transport systems,
while SAWL is preferred for high-performance requirements in extreme environments.
Understanding their differences is essential for selecting the appropriate type based on specific project needs.
Latest News
Industry News
Dec. 22, 2025
Why are elbows made of stainless steel?
Stainless steel stamped elbows are suitable for pipeline systems in petroleum, chemical, hydropower, natural gas, construction, and steam storage tank industries because they can be used directly as raw materials without the need for blanks. Large-diameter thin-walled carbon steel elbows can serve as low-cost pipe-making equipment and molds. By shortening the production cycle, production management costs can be significantly reduced. Especially for large steel elbows, the blank surface is smooth, with good ductility, and the stamping process is simple, precise, easy to operate, and assembly and welding processes are also very convenient. Stainless steel elbo
Industry News
Dec. 19, 2025
45° short radius elbow and long radius elbow
45° short radius elbow and long radius elbow
Industry News
Dec. 18, 2025
Methods for selecting appropriate stainless steel elbows based on operating conditions
The selection of stainless steel elbows is largely influenced by operating conditions. Here are some methods for selecting suitable stainless steel elbows based on operating conditions:
Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
FAQ
What certifications do your products have?
Our products comply with international standards such as ASTM, ANSI, JIS, DIN, and GB. We also hold various certifications to assure quality and reliability, including ISO 9001.
How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru, USA, Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.)
Get Quote
Have questions or need a custom solution? Reach out to us!
Our team at Authentic is here to help you find the right pipe fittings and flanges for your specific needs.
You Can Contact Us in the Following Ways
authentic013@steelpipes-fitting.com
+86 13668807131
Donghe Industrial Zone, Mengcun County, Cangzhou City, Hebei Province
Get Quote
At Authentic, we understand that every project has unique requirements. Our dedicated team is here to provide you with a customized quote tailored to your specific needs. By filling out the form below, you’ll receive competitive pricing, high-quality product details, and estimated delivery times.
中文
Русский
Español
عربي
