What is S355J2H Spiral Welded Steel Pipe?
S355J2H spiral welded steel pipe is a type of spiral welded steel pipe made from a specific grade of structural steel. It is manufactured using a spiral welding process, and its material properties (defined by the S355J2H designation) include a minimum yield strength of 355 MPa and good toughness even at temperatures as low as -20°C.
What are the raw materials for S355J2H SSAW welded pipe?
The main raw material for SSAW welded pipe is steel coil. These coils are typically made of low-carbon steel or low-alloy steel, with the specific steel grade depending on the intended use and the requirements of the finished pipe.
What are the welding process steps for S355J2H SSAW welded pipe?
Spiral steel pipe (SSAW steel pipe) is a spiral seam steel pipe made from strip steel coils, typically using an extrusion forming process, and then welded by automatic double-wire double-sided submerged arc welding. Spiral welded steel pipes are produced by feeding strip steel into a welding pipe unit, where it is gradually rolled into a round tube blank with an opening after multi-roll rolling. The weld gap is controlled to 1-3mm by adjusting the pressure of the pressure rollers, ensuring the weld ends are flush.
What engineering projects are S355J2H spiral welded steel pipes mainly used for?
S355J2H spiral welded steel pipes are mainly used in structural applications, such as pile foundations, bridge construction, and marine structures, as well as low-pressure fluid transportation in water supply and sewage systems.
What are the advantages of S355J2H spiral welded steel pipes compared to straight seam welded steel pipes?
S355J2H spiral submerged arc welded (SSAW) pipes have advantages over straight seam welded pipes because they can withstand higher pressures, produce larger diameters, and have better crack resistance. Furthermore, S355J2H steel also possesses high strength and low-temperature performance. While both are high in strength, the SSAW welding process offers unique advantages in manufacturing and performance.
