SSAW Spiral Submerged Arc Welded Steel Pipe
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Spiral Weld
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Wide Diameter Range
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Cost Effective
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Detailed Description of SSAW Pipe
Spiral Seam Submerged Arc Welded Steel Pipe (SSAW/HSAW) is manufactured through a unique spiral forming process, in which the hot rolled steel strip is first flattened and then spirally coiled at a forming angle of 15-60°, and then internally and externally welded using a double wire submerged arc welding process. This process is capable of producing a 2.5 meter diameter pipe from a 1.2 meter wide steel strip, with a material utilization rate 15-20% higher than that of a straight seam welded pipe, and the spiral weld allows for a more uniform stress distribution. Its excellent cost performance makes it widely used in engineering fields such as oil and gas transportation, submarine pipelines and urban pipeline corridors, especially suitable for long-distance pipeline construction and low-temperature environment.
Key Parameters for SSAW Pipe
Parameter |
Details |
Standards |
API 5L, ASTM A252, EN10217, ASTM A333, SY/T5037, GB/T9711, DIN1626 |
Steel Grade |
API 5L: (PSL1, PSL2),Gr.B, X42-X80; ASTM A252: Gr.1, Gr.2, Gr.3; ASTM A333: GR.1-10; SY/T: Q235B, Q345B, L245-L555; EN: S235GT, S355GT, |
Outer Diameter (OD) |
219.1mm - 3500mm (8" - 140") |
Wall Thickness (WT) |
3.0mm - 25.4mm (up to 1 inch) |
Length |
6m - 18m, commonly 12m (SRL/DRL) |
Pipe Ends |
Beveled End (BE), Plain End (PE) |
Surface Treatment |
Bare, Black painting, Varnish, Anti-rust oil, 3PE, FBE, Epoxy coating, Bitumen coating |
Inspection |
Chemical Analysis, Mechanical Testing, Hydrostatic Test, NDT (UT, RT, MT), Dimensional Inspection, Weld Inspection |
SSAW Steel Pipe Specifications
Outside Diameter(mm) |
inch |
6 |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
22 |
24 |
25.4 |
219.1 |
8" |
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273 |
10" |
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323.9 |
12" |
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355.6 |
14" |
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406.4 |
16" |
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508 |
20" |
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610 |
24" |
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711 |
28" |
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813 |
34" |
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914 |
36" |
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1016 |
40" |
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1219 |
48" |
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1422 |
56" |
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1626 |
64" |
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1828 |
72" |
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2032 |
80" |
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2438.4 |
96" |
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3048 |
120" |
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3556 |
140" |
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Depth Application Scenario Analysis
Water Engineering Field
Municipal Pipe Network: DN400-3000mm pipe diameter range, made of Q235B/Q355B, working pressure ≤1.6MPa
Irrigation System: Special anti-corrosion treatment (3PE/Epoxy Coal Bituminous) to cope with soil corrosion
Drainage System: Leakage Prevention Welding Process Tested by API SPEC 5L Standard
Energy Transmission Field
Oil and Gas Gathering and transmission: applicable to SY/T5037 standard, maximum working pressure 4.0MPa
Coalbed methane development: X42-X70 grade pipeline steel, low temperature toughness up to -40℃
LNG supporting: double-sided submerged arc welding process supporting cathodic protection system
Infrastructure field
Piling engineering: wall thickness up to 25mm, pile depth exceeding 80 meters limit
Structural support: certified by GB/T3091 Reinforced pipe fittings
Offshore platforms: corrosion-resistant pipes complying with API 5L PSL2 standard
Industrial special applications
Power plant circulating water: inner wall cement mortar lining technology to reduce flow resistance
Chemical pipelines: composite plate (Q345R+316L) acid and alkali resistant solution
Dredging project: reinforced pipe section prepared by NM360 wear-resistant steel
Advantages of SSAW Steel Pipe
Ultra-large Diameter: 1.2m steel strip can produce 3m diameter pipe, material utilization rate is increased by 15-20%, saving cost.
Stress optimization: 50-70° angle design of spiral weld, stress concentration is 30% lower than straight seam pipe, suitable for high pressure transmission.
Economical and efficient: 40% fewer welded joints in a standard 12-18 meter pipe section, increasing efficiency and reducing the risk of leakage.
Wide range of applications: 0.5-4.0MPa pressure range, X42-X80 steel grade optional, adaptable to -60℃ extreme cold and marine environment.
Quality Assurance: Comply with API 5L/ISO 3183 standard, adopt ultrasonic and X-ray double testing to ensure the quality of welded joints.
