what is Spiral welded pipe?
Pipes are made out of many different raw materials. Metallic pipes are very common in piping applications. The metallic pipes are made out of different procedures. The main categories are seamless pipes and welded pipes. Welded pipes are made through different welding procedures. The Spiral welded pipe is made through a special welding procedure. The pipes are made from strips of metal and the strips are welded end to end spirally to make the pipe. The Saw spiral welded pipe is made up of a submerged arc welding procedure to weld the strips spirally.
Spiral welded pipe specification, sizes, and dimensions
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the difference between spiral welded pipe and longitudinal
The longitudinal or strain welding involves selecting a piece of metallic sheet or plate and then forming it to be bent into a tubular shape and then welding the edges together. The Spiral weld pipes are made from strips that are rolled at a preferred helical angle and then the adjacent edges of the strips are welded together to make the Spiral welded steel pipe. So the longitudinal weld pipes have a straight line seam whereas the spiral weld pipes have a spiral seam.
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What are spiral welded pipe disadvantages?
Spiral welded steel pipe ends up with a larder crescent. And the strips used to weld into a pipe have a higher elasticity at their edges. Due to the nature of the strips, it is difficult to align the strips properly to make the Spiral steel pipe. As a result, the quality of the welding is affected and it is a time-consuming and expensive procedure due to the extended hours of welding needed for this particular method.
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What are spiral pipe welding defects?
The pores are holes or openings in the welded area. It is possible that the American spiralweld pipe–vimp and others can develop pores during the welding procedure. The other major problem is the thermal crack. There is much contact time with the spiral welding and it makes the material vulnerable to thermal deformity. When the pipe has been exposed to long hours of high temperatures, it forms thermal cracks. One more problem with the
Saw spiral welded pipe is the undercut. The undercut is an accidental reduction of the cross-sectional thickness of the welded strips as a byproduct of the heating and welding.
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difference between erw pipe and spiral welded pipe
Welspun spiral welded pipe and other spiral weld pipes involve having to weld with a welding rod in a spiral pattern. Electric resistance welding or erw welding does not require welding rods. The bent and formed metallic sheet or plate in a tubular shape is sent through lap joints into the system where the pipe is heated. The heat is generated because the piping material produces much more resistance than the electric conductors attached to the pipe. This produces enough heat to melt the pipe to just the point where it could be pressed together so the edges get in contact for long enough and form the welding.
Check Stocking distributors who keep stock of spiral submerged arc welded steel pipes of top 10 manufacturers like Jindal, ISMT, MSL, TISCO, Baosteel, JFE, and many more, look at the manufacturing process.
how is spiral welded pipe made?
Where the pipe has to be made from strips of metal, the best way is to weld them spirally with a helical angle. The Spiral submerged arc welded steel pipes and others are welded by having the strips rolled in the desired angle and then welding the edges together. It has to be taken care not to expose the materials to high temperatures for too long during the Spiral weld. If exposed, the material may develop thermal cracks, pores, or undercuts which are defects that affect the quality and capacity of the end product.