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ERW Steel Pipe and LSAW Steel Pipe

in Help Wanted Wed Feb 12, 2014 8:57 pm
by xinlinpipe • 3 Posts | 30 Points

Resistance welding is applying pressure to the composition steel pieces through the electrode, the use of current through the resistor and the thermal contact surface area surrounding the joint generated by welding. Welded steel technique is use current flowing through the thermal effect on the resistance welding the piece contact surface surrounding region which is heated to produce a molten or plastic state, so as to form a metal bonding method.

Used for low pressure liquid delivery, water, petroleum, natural gas, mechanical processing, petrochemical, transportation etc. The first advantage of LASW welded steel pipe is fully automated; second, the heat exchange and protection of itself relatively high performance, high level quality welding out; further more, the submerged arc welding drugs buried in the bottom, so LASW welded steel pipe can be used high current, high welding efficiency come out.

This system inlude a funnel that is matched with a pipeline to be welded to the front. The second difference is the use of welding, wire bonding is used, because the wire can be continuously sent; Electrodes, we get burn a rod electrode head gave a throw, and the operation was stopped, and then change electrode welding. Changed after the wire, the wire delivery device with a plate and the wire, the wire is continuously sent, this welding wire is fed continuously in a granular fusible flux covering ignition arc welding wire, base material and part of the melting and evaporation flux forms a cavity. The arc is stable combustion in the cavity inside, so call it submerged arc welding. Arc is buried in the inside of the cavity.


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