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API 5L CW PIPE

CONTINUOUS WELDED PIPE (CW)

-Longitudinally furnace butt welded or by mean of continuous welded process.
* Continuous welded pipes are considered as the lowest cost variants among all steel pipes.

Specifications

* ASTM A-53 Type F, which is (Grade A only).
* ASTM A-53A/53M, Federal, Specification WW-P404 & ASME B36.10M & B36.19M.
* ASTM A-120 (withdrawn 1988). A-501. A-589, A-618.and API5L.


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API 5L DSAW PIPE

DOUBLE SUBMERGED ARC WELD PIPE (DSAW)

Derives its name from the welding process wherein the welding arc is submerged in flux while the welding takes place.
Both inside and outside welds are required and are usually accomplished in separate processes, hence the word “double.”
These separate welds consume a portion of the other resulting in a single high quality weld nugget.


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API 5L ERW PIPES

ELECTRIC RESISTANCE WELDED PIPES (ERW)

The processing of Electric Resistance Welded (ERW, induction welding and contact welding)pipe begins as a coiled
plate of steel with appropriate thickness and specific width to form a pipe that conforms to its relevant specification.


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API 5L LSAW PIPE

LSAW PIPES

Longitudinally Submerged Arc Welded Steel pipes. – Longitudinal edges of steel plates as raw material, are first beveled using carbide milling equipment; Beveled plates are then formed into a U shape using a U-press and subsequently
into an O shape using an O-press.UOE is the name of the method used for production of longitudinally welded large
diameter pipes.


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API 5L Seamless Pipe

SEAMLESS PIPE

(SMLS) is made when steel in a solid, round cylindrical shape, called a “billet” or a “tube round” is heated and then

either pushed or pulled (while being rapidly rotated) over a mandrel with a piercing point positioned in the center

of the billet. This activity produces a hollow tube or “shell”. The tube is then further finished until it becomes the size

and wall thickness desired. (Because the pipe is formed in a heated manner the pipe is normalized and should have a

consistent steel cellular pattern throughout its circumference).


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