Have you know API 5L PSL2 X60 SSAW steel pipe? No matter, Katalor is a professional steel supplier and exporter in China, we supply the API 5L PSL2 X60 SSAW steel pipe with good quality. As the following, API 5L PSL2 X60 SSAW steel pipe divide into the two parts.
If the gap is too large, the proximity effect is reduced, the eddy current heat is insufficient, and the weld intergranular joint is poor to cause unmelting or cracking.
If the gap is too small, the proximity effect is increased, the welding heat is too large, and the weld is burnt; or the weld is pressed and rolled to form a deep pit, which affects the surface quality of the weld.
After the two edges of the tube blank are heated to the soldering temperature, under the extrusion of the pressing roller, a common metal grain is formed to infiltrate and crystallize, thereby finally forming a firm weld bead. API 5L PSL2 X60 SSAW steel pipe If the pressing force is too small, the number of common crystals will be small, the strength of the weld metal will decrease, and cracking will occur after the force is applied. If the pressing force is too large, the molten metal will be extrusion welds not only reduce the weld strength, but also produce a large number of internal and external burrs, and even cause weld seams and other defects.
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