Permanent Steel Manufacturing Co.,Ltd

Home  >  Hot News  >  Current News

Difference Between HFW Steel Pipe and ERW Steel Pipe

Date:2020-04-07    keywords:erw steel pipe,hfw steel pipe
The changes in the names of ERW and HFW change with the development of technology and the update of standards.

First of all, the equipment for high-frequency resistance welding steel pipes is produced in Germany, and the earliest domestic production lines are in Baoji and Jinxiculudao. These two sets of equipment are called middle straight seam and big straight seam. The early welding forms of this equipment are also two types, namely contact resistance welding and induction resistance welding. Although there are two welding methods, both referred to as ERW, but due to the consistency of the raw material coil during the early equipment, especially the accuracy of the edge The control and control of foreign equipment's configuration control are not good, resulting in unstable quality of contact welding, relatively speaking, the production rate of induction welding is relatively high, so the development of contact welding is lagging behind. However, with the advancement of technology, especially when the disadvantage of low energy utilization of induction welding is becoming more and more obvious, contact welding technology has also made greater progress. The application of contact welding is now more and more extensive.

The API 5L standard has unified ERW steel pipe and HFW steel pipe in the definition since about the 44th edition, and both are called HFW.

©2017 Permanent Steel Manufacturing Co.,Ltd  https://www.permanentsteel.com  All Rights Reserved.  Terms of Sale|Privacy Policy

We use cookies to offer a better browsing experience, analyze site traffic, and personalize content. By using this site, you agree to our use of cookies.