What is hsaw pipe?
Helical submerged arc welding (spiral) steel pipe is the full name of hsaw pipe, to the strip into the welded pipe unit, the multi-roll rolling, the strip gradually rolled up to form a circular tube with an open gap, adjust the reduction of squeezing roller so that the weld gap control in 1 ~ 3mm, and make both ends of …
What is LSAW and HSAW?
LSAW and HSAW are variants of SAW (submerged arc welded) pipes. The difference between them is the way they are welded. In the HSAW type, steel coils are welded spirally, like a helix, so that the coil (strip) assumes the shape of a pipe. SAW pipes are used mainly in oil and gas transportation.
What is the difference between LSAW and HSAW pipes?
The difference is SSAW pipes are welded in the helix or spiral position while LSAW pipes are welded in the longitudinal direction. SSAW pipe takes form by rolling and welding a steel strip in a way that the pivotal direction is oblique to the axis or pipe center, making the weld seam in a spiral line.
What is the meaning of ERW?
Electric resistance welded (ERW) pipe is made from steel coil and the weld seam runs parallel to the pipe.
What is SAWH pipe?
SAWH Steel 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,SAWH Weld Pipe was relegated to low pressure and structural applications.
What does DSAW pipe mean?
Double submerged arc welding
Double submerged arc welding is a process that involves two submerged arc welding passes. Double submerged arc welding is advantageous over other pipe seam welding processes such as electric resistance welding because it can be used to form large diameter (4 inches and larger) and thick (1/4 inch and up) pipe.
What is ssaw welding?
SSAW Pipe (Spiral Submerged Arc-Welding Pipe), also called HSAW pipe (Helical SAW), welding line shape like a helix. It is using the same welding technology of Submerged Arc-Welding with LSAW pipe. Differently SSAW pipe is spiral welded where the LSAW is longitudinally welded.
What is Lsaw welding?
Longitudinal Submerged Arc Welding is a specific welding technique used in pipe production where the finished product requires a particularly high wall thickness due to high internal or external pressures. …
Where ERW pipe is used?
Owing to their diverse usability and reliability, ERW pipes are popularly used for drinking water, thermal powers, in collieries for water extraction, used as hand pumps for boring wells as protection for cables by telecom sector.