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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.
Spiral submerged-arc welding pipes
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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SSAW pipe is made of hot rolled coiled steel by automatic submerged arc weld under normal atmospheric temperature. All the pipes are produced according to API Spec 5L, GB/T9711.1, GB/T9711.2, ASTM A252-89 standard. These pipes mainly used in petroleum and natural gas industry to transport flammable and non-flammable liquid and steel construction.
Size:
(O.D×Wall Thickness)mm×Length(mm)
219-3200mm×5-30mm x 12000mm+500mm
In addition to above specification, the pipes can be produced according to customer’s requirements.

Execute Standard:
ASTM A252-89 WELDE AND SEAMLESS STEEL PIPE PILES
API SPEC 5L Specification for Line Pipe
GB/T9711.1 Petroleum and natural gas industries—Steel pipe for pipelines—Technical delivery conditions
SY/T5037 Spiral submerged arc welded pipe for low pressure liquid transportation

Material:
Q235-Q345, L175-L485, SS400, 16Mn, L290-L360
or according to the customer's requirements.

Mainly usage:
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.
Pipe Coating: HDPE/ 3PE/ 3PP/ Pipe cement mortar lining
Mill Test Certificate: EN 10204/3.1B
Third party inspection: SGS, BV, Lloyds etc.

Alloy steel is often subdivided into two groups: high alloy steels and low alloy steels. The difference between the two is defined somewhat arbitrarily.
Alloy steel is steel that is alloyed with a variety of elements....

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