ERW steel pipes and straight submerged arc welded (UOE) steel pipe

ERW pipe and straight submerged arc welded (UOE) steel pipes:

First, 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 UOE steel pipe is hot rolled steel plate. Therefore, ERW steel pipe can realize continuous flow operation, high production efficiency and low production cost; while UOE steel pipe is processed by steel plate, which cannot realize continuous flow operation, low production efficiency and high production cost.

ERW steel pipe is limited by the thickness of the coil. Generally, the maximum thickness that can be produced is 25mm, and the maximum diameter that can be produced is 660mm. UOE steel pipes can be produced with a maximum thickness of 40mm. The maximum production diameter is 1422mm.

2. Welding difference
ERW steel pipe does not need welding wire; UOE steel pipe needs welding wire.

3. Appearance differences
The inner and outer welds of ERW steel pipes need to be removed, which is conducive to anti-corrosion; leaving excess welds on the inner and outer walls of UOE steel pipes is not conducive to anti-corrosion.

4. The difference between purchase cost and difficulty
The purchase cost of ERW steel pipe is low, and the cost of UOE steel pipe is very high, and the general price difference is 15%-25%. There are few domestic manufacturers of UOE steel pipes, and it is difficult to purchase. When the diameter is less than 406mm, the difference in purchasing cost is even greater. There are many ERW steel pipe manufacturers, and the procurement difficulty is low. When the diameter is less than 406mm, the purchasing cost will be greatly reduced.

5. Application Differences
ERW steel pipes are mainly used for long-distance land transportation pipelines such as natural gas, refined oil, crude oil, and pulp. UOE steel pipes are mainly used in high-pressure submarine long-distance pipelines, alpine regions, and land of Class II, III, and IV.

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Article source: https://article-realm.com/article/Finance/31971-ERW-steel-pipes-and-straight-submerged-arc-welded-UOE-steel-pipe.html