Spiral submerged arc welding(SSAW) is its forward direction and forming tube centerline hose reel molding angle (adjustable), side molding edge welding and weld them into a spiral.
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In addition to above specification, the pipes can be produced according to customer’s requirements.



These pipes mainly used in petroleum and natural gas industry to transport flammable and non-flammable liquid and steel construction.

Size range:

  • Out diameter: 219-3200mm

  • Wall thickness: 5-30mm

  • Length 12000mm+500mm


API 5L pipes


  • Q235-Q345

  • L175-L485

  • SS400

  • 16Mn

  • L290-L360

  • or according to the customer's requirements.

SSAW pipe is made of hot rolled coiled steel by automatic submerged arc weld under normal atmospheric temperature.

Pipe End: 

square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled, 


Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,  Fusion Bond Epoxy, 3-layers PE)


Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.


Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield, strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.

Mill Test Certificate: EN 10204/3.1B 
Third party inspection: SGS, BV, Lloyds etc.

We have a team of experienced professionals with years of experience in manufacturing.

Spiral Submerged-arc Welded Quality Assurance

Spiral welded pipe production by submerged arc method is based on using tandem welding technique for joining inside and outside coil edges, which have been trimmed and beveled by carbide milling for high quality weld structure.

SSAW pipe technological process & Success Stories:


Ultrasonic Inspecting


SMAW welding

There are nine modernized product lines in our company with the yield capacity of 1000 thousands tons of B-X80 steel pipe of φ219-φ3200mm, WT5-30mm.

SSAW pipe technological process & Success Stories


Chemical Analysis


Universal Testing Machine


Metallurgical Analysis

Listing some notes You must know

  • Oiled marking: Steel after passing wrer oiled to prevent corrosion,and according to user requirements for making.

  • Leveling Milling: The flat steel anvil machine so that the origal curl,and then thouth the edge milling machine for two-sided steel milling,so as to meet the requirements of the plate width,plate edge parallelism and groove shape.

  • Shear molding: The steel plate production line along the outer edge of the spiral curl into a tube.

  • Butt cut: Double-sided submerged arc welding using advanced technology to pre-welding,internal welding,outside wilding.The welded steel pipe using a plasma-foot cut to specification length.


Welding of hot rolled steel coils takes spiral form after passing through preforming and forming rolls. Excellent exterior weld quality at high production speeds is provided by double submerged arc welding process. Manufactured pipes are cut to the desired lengths at the exit of the pipe machine. Pipe ends are beveled by means of carbide machining for accurate on-site welding.

After the pipe is conveyed to hydrostatic testing and off-line ultrasonic testing and/or real time X-ray inspection, the pipe will be subject to final inspection for the compliance to customer requirements.

SSAW pipes Quality Assurance -- Quality Control


Outside Diameter Control


Hydrostatic Testing


X-Ray Testing Online

Starting from incoming control up to the final inspection stage; entire process is monitored and supported by computerized system. Traceability is achieved by input controls and barcodes through entire production lines.

SSAW pipes success stories

Widely preferred longer lengths up to 18,5 m. considerably decreases the cost of pipeline construction resulting in less number of girth welds compared to shorter pipe lengths.

Spiral welded steel pipes are widely used in Oil, Natural Gas, Water and other flammable & nonflammable liquid conveyance and distribution pipelines, steel structures for construction and other general purposes by means of their wide size range.

Spiral Submerged-arc Welded steel pipe technological process

There are nine modernized product lines in our company with the yield capacity of 1000 thousands tons of B-X80 steel pipe of φ219-φ3200mm, WT5-30mm.

Which specification of SSAW pipe we can offer?

There are some detailed specifications of spiral steel pipe that we produce now for our customers all over the world.

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