ERW (Electric Resistance Welding) pipe is manufactured by rolling metal and then welding it longitudinally across its length. Seamless pipe is manufactured by extruding the metal to the desired length; hence ERW pipe has a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length.
ERW pipe has an obvious welded seam - hence the difference.
ERW tubes are made by welding so it has a seam and seamless tubes are produced by extruding.
Seamless pipe is very expensive, and is only used in certain applications, such as steam condensate return, where ERW (seamed) pipe would not last as long. For a handrail, go with the ERW.
Seamless (SMLS) pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell. Seamless pipe withstands pressure better than other types, and is often more easily available than welded pipe.Welded pipe is formed by rolling plate and welding the seam. The weld flash can be removed from the outside or inside surfaces using a scarfing blade. The weld zone can also be heat treated to make the seam less visible.
What is the defferec between Carbon steel pipe and Mild steel pipe? Syed Hamad Ur Rehman Project Director Hatah (Pvt) Ltd hamad@hatch.com.pk www.hatch.com.pk
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
ERW: Electric Resistance Welding tube - tubes are rolled and joined With welding - fin cut is there CRW: Cold Drawn tube - without fin cut - Draw process
One pipe is electric resistance welded (erw) the other is extruded through a thimble. In other words one has a seam the other doesn't.
MS pipe refers to mild steel pipe and ERW pipe is electric resistance welding pipe. The difference is ERW is made of very fine hard steel, while MS (black pipe) is made of malleable steel.
Seamless pipe is very expensive, and is only used in certain applications, such as steam condensate return, where ERW (seamed) pipe would not last as long. For a handrail, go with the ERW.
It increases only cost..
it covers both
Seamless (SMLS) pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell. Seamless pipe withstands pressure better than other types, and is often more easily available than welded pipe.Welded pipe is formed by rolling plate and welding the seam. The weld flash can be removed from the outside or inside surfaces using a scarfing blade. The weld zone can also be heat treated to make the seam less visible.
Pipe ERW black pipe class -B And Class-C difference.
yes
What is the defferec between Carbon steel pipe and Mild steel pipe? Syed Hamad Ur Rehman Project Director Hatah (Pvt) Ltd hamad@hatch.com.pk www.hatch.com.pk
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
Electric resistant weld
ERW: Electric Resistance Welding tube - tubes are rolled and joined With welding - fin cut is there CRW: Cold Drawn tube - without fin cut - Draw process