Press

Differences Between Electric Resistance Welding and Electric Fusion Welding


ERW is the abbreviation of electric resistance welding.
The welding method of ERW pipe and submerged arc welded pipe is significantly different. The pressure welding method without filler metal is adopted. The weld is not filled with other components, and the skin effect and the proximity effect of the high frequency current are used to instantaneously heat the edge of the plate. At the soldering temperature, the weld of the forged
structure is extruded by a squeeze roll. High-quality steel pipes require heat treatment on the weld line or off-line to refine the microstructure of the weld zone. The weld of the high-quality ERW steel pipe can reach the same level of toughness as the base metal, which cannot be achieved by the submerged arc welding process.

EFW is the abbreviation of electric fusion welding.
One of submerged arc welding (SAW)-electric welding (EFW) is a process in which metal is heated by one or several consumable electrodes and a workpiece to heat the metal, and the arc is used to make the metal and fill. The material is fully melted and does not require pressurization. The part of the filling metal is all from the electrode. Melt Gas Shielded Welding (GMAW)–A type of electrofusion welding (EFW) that is similar to submerged arc welding, but its protection comes from inert gases and works better.

Spiral welding – this is also a type of submerged arc welding with a spiral weld.



New service from OilVoice
Trip Shepherd is for companies who need to track their staff in areas of risk.
It's free to use, so we invite you to try it.

Visit source site

https://permanentsteel.com/newsshow/differences-be...

Electric Resistance WeldingElectric Fusion WeldingEFWerw steel pipe

More items from lvy


Comparison of Characteristics Between ERW Steel Pipe and Spiral Submerged Arc Welded Steel Pipe

Both straight seam resistance welded steel pipes ( ERW steel pipe ) and spiral submerged arc welded steel pipes ( SSAW steel pipe ) can better meet the requirements of oil and gas pipelines. For medium-diameter (Ф630mm) steel pipes, ERW steel pipes are mostly used abroad. Spiral submerged arc welded ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 day agoPress > erw steel pipeSpiral Submerged Arc Welded Steel Pipessaw steel pipe +1

Heat Treatment Technology of Rectangular Tube

In order to improve the surface hardness and abrasion resistance of rectangular tubes, some surface treatments can be performed on them, namely flame surface fire, high and medium frequency surface quenching, and some chemical heat treatment. Generally speaking, most high and medium frequency surfac ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 8 days agoPress > Rectangular TubeHeat Treatment Technology

Testing Method of Casing Pipe

Casing pipe is a high-end product for steel pipe production. There are many types of casing, and there are 15 kinds of casing diameter specifications. External diameter range is 114.3-508mm; steel types are J55, K55, N80, L-80, P-110, C-90, C-95, T-95, etc. 11 kinds; casing end buckle type and var ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 13 days agoPress > casing pipeTesting Method

How to Control the Special Oil Pipe

How to control the special oil pipe? Let us briefly understand: Valves are mechanical devices used to open, close, and perhaps regulate the flow of media in pipes. There are many types of valves, and there are many types of classification. If it is differentiated by purpose, it can be divided into ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 15 days agoPress > Special Oil Pipecontrolvalves

How to Derust the Seamless Steel Pipes

Types of rust of seamless steel pipes : Generally speaking, the rust on the surface of American standard steel pipes can be divided into floating rust, medium rust, and heavy rust according to the time of shipment, storage and transportation conditions, and humidity. Floating rust: Generally, when ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 17 days agoPress > Seamless Steel PipesDerust
All posts from lvy