Spiral Weld Steel Pipe

Spiral weld steel pipe

Spiral welded steel pipe, SSAW, SAW

Relating standard of spiral weld steel pipe

ASTM A252 standard specification for welded and seamless steel pipe piles

Scope-"This specification covers nominal (average) wall steel pipe piles of cylindrical shape and applies to pipe piles in which the steel cylinder acts as a permanent load-carrying member, or as a shell to form cast-in-place concrete piles."

Material & Manufacture-"The piles shall be made by the seamless, electric resistance weld, flash weld, or fusion welded process. The seams of welded pipe piles shall be longitudinal, helical butt, or helical-lap."

ASTM A572 standard specification for high strength low alloy columbium-Vanadium structural steel

Scope-"This specification covers five grades of high-strength low alloy structural steel shapes, plates, sheet piling, and bars. Grades 42 [290], 50 [345], and 55 [380] are intended for riveted, bolted, or welded structures. Grades 60 [415] and 65 [450] are intended for riveted or bolted construction of bridges, or for riveted, bolted, or welded construction in other applications."

ASTM A690 standard specification for high strength low alloy nickel, copper, phosphorus steel H-piles and sheet piling with atmospheric corrosion resistance for use in marine environments

Scope-"This specification covers high-strength low-alloy nickel, copper, phosphorus steel H-piles and sheet piling of structural quality for use in the construction of dock walls, sea walls, bulkheads, excavations, and like applications in marine environments."

Application of spiral weld steel pipe

Drilled Shaft Casing

Sign Poles, Towers, & Transmission Lines

Structural Sections

Combination Walls

Mining

Jacked & Bored

Line pipe

Abrasion Resistant Pipe

WANLEI is capable of a wide variety of fabrication services. Please do not hesitate to call for any

fabrication needs.

• Custom Fabrication (Upon Request)

• Cutting/Splicing to Custom Lengths

• Elbows

• End Plate/Point Attachments

• Flanges

• Laterals & Reducers

• Lifting Lugs

• Reinforcing Bands

• Splicing or Splicers

Manufacturing process of spiral weld steel pipe

Spiral weld steel pipe is manufactured from steel coil.

UNCOILING

Upon receipt of the coil, it is placed on a horizontal uncoiler mandrel and fed into the straightener.

FLATTENING

The strip of coil is introduced into the flattener through a roll stand and the coil set is removed.

JOINING OF THE COIL ENDS

As the coil continues to move through the straightener, the leading and trailing edges of the strip are trimmed in preparation for butt welding – coil to coil.

EDGE MILLING

The edges of the coil are trimmed in preparation for welding.

PIPE SPIRALING

The strip of coil enters the three roll apparatus composed of lead, buttress and mandrel roll sets. At this stage, the coil starts to form the spiral shape that will then become pipe.

SINGLE & TANDEM PIPE WELDING

The welding system welds the pipe, both inside and outside, using a submerged arc welding system.

PIPE CUT-OFF

Once the pipe reaches the desired length, the cut-off machine is engaged. Traveling with the pipe, a plasma torch provides the cut-off of the finished pipe.

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