According to the classification of slag properties, the LSAW can be divided into two categories: acid welded pipe rod and alkaline welded pipe. The electrode whose slag is mainly acid oxide is called acid electrode. The electrode whose slag is mainly alkaline oxide and calcium fluoride is called alkaline electrode.

Alkaline electrode

1. High sensitivity to water and rust, baking at 300～350℃ for 1～2h before use

2. DC reverse welding is required; after the coating is added with arc stabilizer, AC and DC welding can be used

3. The acid welding agreement of the same specification is about 10% smaller

4. Short arc operation is required, otherwise it is easy to cause pores

5. Good transition effect of alloying elements

6. Slightly deeper penetration, general weld formation

7. The slag is crystalline and the slag removal is not as good as the acid electrode

8. The normal and low temperature impact toughness of the weld is higher

9. Good crack resistance of the weld

10. Low hydrogen content in the weld

11. Slightly more smoke and dust during welding

Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.