Spiral Submerged Arc Welded Steel Pipe
Our SSAW steel pipe production lines are equipped with world-class production and inspection equipment, and they can manufacture all kinds of SSAW pipe with high steel grade, large wall thickness, and high quality as per API 5L and GB/T9711, etc.
The SSAW steel pipe has the right to use the API monogram.
The SSAW steel pipe is widely used in long-distance pipeline projects for the transmission of oil, natural gas, water as well as coal gas, etc, and also is used in all kinds of engineering, such as chemical industry, electric power, irrigation, construction, and piling, etc.
Production Description
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
Application: | Used for oil/gas/water transmission,construction & structure parts |
Size: | OD: 219mm-4064mm |
WT: 3.2mm-40mm | |
Length: 5.8 /6 / 11.8 / 12 / 18 / 32 / 48m | |
Pipe Standard: | API 5L PSL1/ PSL2 Gr.A Gr.B, X42, X46, X52, X60, X65, X70 |
ASTM A53 ,Gr.A, Gr.B, | |
ASTM A252 Gr. 1, Gr. 2, Gr.3 ASTM A500 | |
AS /NZS 1163 , AS /NZS 1074 | |
EN10219 ,EN 10217, etc. |
Standard
Classification | Standard | Main Products | ||||||||||||||
Line Pipe | API 5L PSL1/2 | Line pipe | ||||||||||||||
Casing | API 5CT/ ISO 11960 PSL1 | Steel pipe for use as casing or tubing for wells of the petroleum and natural gas industries | ||||||||||||||
Steel Pipe for Fluid Service | ASTM A53 | Black and hot-dipped galvanized, welded, and seamless steel pipe | ||||||||||||||
BS EN10217-2 | Welded steel tubes for pressure purposes – delivery technical conditions – part 2: Electrically welded non-alloy and alloy steel tubes with specified elevated temperature properties | |||||||||||||||
BS EN10217-5 | Welded steel tubes for pressure purposes – delivery technical conditions – part 5: submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties | |||||||||||||||
Steel Pipe for Ordinary Structure | ASTM A252 | Welded and seamless steel pipe piles | ||||||||||||||
BS EN10219-1 | Cold-formed welded structural hollow sections of non-alloy and fine-grain steels – Part 1: Technical delivery conditions | |||||||||||||||
BS EN10219-2 | Cold-formed welded structural hollow sections of non-alloy and fine-grain steels – Part 2: tolerances, dimensions, and sectional properties |
Technological process
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