Spiral Submerged Arc Welded Steel Pipe

Spiral Submerged Arc Welded (SSAW) Steel Pipe

SSAW steel pipe, or Spiral Submerged Arc Welded steel pipe, refers to a type of spirally welded steel pipe manufactured using a double-sided submerged arc welding process. These pipes are crafted from narrower sheets or hot-rolled coils, a method that significantly lowers their production expenses. The spiral welding technique facilitates the creation of large-diameter pipes, ideal for the high-volume transportation of oil and gas.

Key Advantages of SSAW Steel Pipe:

1. Versatile Diameter Production: SSAW pipes can be produced in various diameters using steel strips of uniform width. This is particularly beneficial for manufacturing large-diameter pipes from narrower strip steel.
2. Enhanced Pressure Resistance: Spiral welds experience considerably less stress under the same pressure conditions compared to straight seams, typically 75% to 90% of straight seam welded pipes. This inherent strength allows them to withstand greater pressures. Consequently, for a given outer diameter and pressure, the wall thickness of an SSAW pipe can be reduced by 10% to 25% compared to a straight-welded pipe.
3. Precise Dimensions: SSAW pipes boast accurate dimensions, with a general diameter tolerance not exceeding 0.12%. Deflection is typically less than 1/2000, and ellipticity is under 1%, often eliminating the need for additional sizing and straightening processes.
4. Continuous and Efficient Production: The continuous production capability of SSAW pipes theoretically allows for infinitely long steel pipes. This results in minimal cutting and tail-end losses, boosting metal utilization by 6% to 8%.
5. Operational Flexibility: Compared to straight seam welded pipes, SSAW production offers greater operational flexibility and simplifies the adjustment for different pipe types.
6. Lightweight Equipment and Lower Investment: The equipment required for SSAW production is relatively lightweight, leading to a smaller initial investment. This allows for the creation of trailer-mounted mobile units, enabling direct pipe production at pipeline construction sites.
7. Ease of Automation: The manufacturing process of SSAW pipes is well-suited for mechanization and automation, contributing to efficient and consistent production.

Specification

Standard

Technological process