Spiral Submerged Welded Steel Pipe

Application: water engineering, chemical industry, electric power, petrochemical and other industries. OD :14 "to 100"
Length: random length, fixed length 6 meters,...
Wall thickness :5.0mm ~ 25mm.

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Spiral Submerged Welded Steel Pipe (SSAW) is a large‑diameter steel pipe made by spirally forming steel strips and welding them with internal and external submerged‑arc welds, offering uniform welds and high strength. It is strong, pressure‑resistant, and suitable for long‑distance transport, widely used in oil, gas, water, chemical, and municipal pipelines, with customizable coatings and sizes for different applications.

Product Parameters

Product Name	Spiral Submerged Welded Steel Pipe
Application	Water engineering, chemical industry, power, petrochemical, longdistance transmission systems
Outside Diameter (OD)	Approx. 14" to 100" (≈ Ø 355 mm to Ø 2,540 mm)
Wall Thickness	5.0 mm to 25.0 mm
Length	Random length or fixed length (for example 6 m)
Manufacturing Process	Steel strip → forming into spiral shape → internal and external submergedarc welding (doublesided)
Surface / Coating	Corrosionresistant treatment; options include epoxy, 3PE, FBE, black painting, oiling
Steel Grade / Standard	Commonly: Q235B, Q345B, API 5L (PSL1/PSL2, X42X80), SY/T5037, GB/T9711 etc.
Key Features	High strength, high pressure resistance, largediameter adaptability, cost efficiency
Quality & Inspection	Material testing, 100% nondestructive weld inspection (ultrasonic/RT/MT), hydrostatic pressure testing

FAQ

Q: What are the main advantages of spiral submerged welded steel pipes(SSAW)?

A: They offer high strength, uniform weld quality, excellent pressure resistance, and cost-effective production for large diameters.

Q: What standards are commonly used for spiral submerged welded steel pipes?

A: SSAW pipes are usually produced according to API 5L, GB/T 9711, and SY/T 5037 standards.

Q: Where are spiral submerged welded steel pipes typically used?

A: They are widely used in oil and gas transmission, water supply, chemical transport, and structural engineering.

Q: What coating options are available for corrosion protection?

A: Coatings such as 3PE, FBE, epoxy, or black paint are available to enhance corrosion resistance and extend service life.

Q: What quality tests are performed on spiral submerged welded steel pipes?

A: Each pipe undergoes non-destructive testing, hydrostatic pressure testing, and visual inspection to ensure welding integrity and mechanical strength.

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