SSAW Spiral Welded Pile Pipes
SSAW spiral welded pipe pile with ASTM A252 Pipe piles are a type of driven steel pipe for deep foundations. Pipe piles are either open or closed end. If driven open end,soil is allowed to enter the bottom of the pile . If required, the soilcan be removed from inside the pipe with a water jet or...
SSAW spiral welded pipe pile with ASTM A252
Pipe piles are a type of driven steel pipe for deep foundations.Pipe piles are either open or closed end. If driven open end,soil is allowed to enter the bottom of the pile. If required, the soilcan be removed from inside the pipe with a water jet or auger.
Spiral weld pipe, as the name implies, is a steel pipe that has a seam running its entire length in a spiral form.
In the past, due to the method of manufacture, spiral welded pipe was relegated to low pressure and
structural applications. With the development of the submerged arc welding process, the production of large
hot rolled coils of sufficient width and the development of dependable non-destructive testing methods, it
is now possible to produce spiral weld pipe for high-pressure service.
Present spiral weld mills consist of a de-coiling device (in the case of strip base material), a strip connecting
welder, straightening rollers, edge preparation tools (shearing and trimming), prebending devices, a bending
and cage forming system, an internal welder, an external welder (both submerged arc), ultrasonic testing
apparatus and cutting devices.
The material passes through all these production stages continuously. The angle between the flat strip being
fed into the machine and the finished pipe leaving the machine controls the pipe diameter in ratio to strip
width and the angle of the weld in the pipe.
Because of the method of manufacture, a wide variety of diameters can be produced. The diameter tolerance
is small, particularly with regard to ovality; and the pipe, due to its axial symmetry, has an inherent straightness.
The length range is infinite and is controlled only by the economics of transportation.
Spiral weld pipe is used for piling and structural
applications, as well as for dredging, slurry, water
and other pipelines.
Spiral weld pipe is produced in accordance with
the dimensional and tolerance requirements of
various ASTM, AWWA and API specifications.
ASTM/ASME A252/SA252 Piling Pipe
ASTM Specification A252 describes 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 case-in-place concrete piles.
MECHANICAL PROPERTIES – TENSILE REQUIREMENTS
|Grade 1||Grade 2||Grade 3|
|Tensile Strength, min, psi||50,000||60,000||66,000|
CHEMICAL REQUIREMENTS FOR A252
|Seamless and ERW Welded||Max% 0.050|
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