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Material standards for SSAW pipe piles

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SSAW pipe pile is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature and welded with automatic double-wire double-sided submerged arc welding process. SSAW pipe pile will be fed into the welded pipe unit, rolled by multiple rolls, the strip is gradually rolled up to form a circular billet with an opening gap, adjusting the amount of squeeze rolls, so that the weld gap is controlled at 1 ~ 3mm, and the ends of the weld port flush.

 

Here is the content list:

Specific requirements for SSAW pipe pile materials

What is the quality control system of SSAW pipe pile materials?

What are the precautions when producing SSAW pipe pile materials?

 

Specific requirements for SSAW pipe pile materials

Both internal and external welding of SSAW pipe pile are carried out by single or double wire submerged arc welding with American Lincoln welding machine, so as to obtain stable welding quality.The finished SSAW pipe pile are inspected by online continuous ultrasonic automatic flaw meter to ensure the coverage of nondestructive testing of spiral welds. If there are defects, automatic alarm and spray mark, production workers according to this at any time to adjust the process parameters to eliminate defects in a timely manner.

Raw materials, i.e. strip coil, welding wire and flux. They are subjected to strict physical and chemical tests before input SSAW pipe pile.

The head and tail of the strip are butt-joined, using single or double wire submerged arc welding, and automatic submerged arc welding is used to make up the welding after the coil is formed into a steel pipe.

Before forming, the strip is leveled, shear edge, planing edge, surface cleaning conveyance and to bend edge processing.

Adopt electric contact pressure gauge to control the pressure of the press down cylinder on both sides of the conveyor to ensure the smooth transportation of the strip steel.

Adopt external control or internal control roll forming.

Weld gap control device is adopted to ensure that the weld gap meets the welding requirements, and the pipe diameter, misalignment amount and weld gap are strictly controlled.

SSAW pipe pile 

What is the quality control system of SSAW pipe pile materials?

We have a strickly quality systerm, each order raw material test will be down before production, and Hydraulic test and X rays test doing for each SSAW pipe pile and with Mill Test certificate to the clients.

We can produce various specifications of SSAW pipe pile, double-sided submerged arc welding SSAW pipe pile, 3PE anti-corrosion SSAW pipe pile, polyurethane insulation SSAW pipe pile. Steel pipe outer diameter φ159-φ2820, wall thickness 3.25mm-80mm, material Q235, Q345, 16Mn, L245, L290, L360, X42-X70 steel grade, product implementation API SPEC 5L, 5CT, GB/T9711.2, SY/T5037, GB/T8163, GB/T8162 standard.

 

What are the precautions when producing SSAW pipe pile materials?

The end of the SSAW pipe pile is machined, so that the verticality of the end face, bevel angle and blunt edge to get accurate control.

Each SSAW pipe pile through the hydrostatic test, the pressure using radial seal. Test pressure and time are strictly controlled by the SSAW pipe pile water pressure microcomputer detection device. Test parameters are automatically printed and recorded.Using air plasma cutting machine to cut the steel pipe into a single.cut into a SSAW pipe pile.

 

Each batch of SSAW pipe piles are subject to a strict first inspection system to check the mechanical properties of the weld, chemical composition, dissolution condition, the surface quality of the SSAW pipe pile and after non-destructive testing to ensure that the SSAW pipe pile production process is qualified before it is officially put into production.


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