TPT July 2020

Coating a welded area after the outside scarfing process has been completed

metal is air blown on the area to be coated (ie the welded scarfed area).  The quality of coating depends on many factors, one of the most important is related to the tube welding speed and the temperature of the welded steel bath, that must not be lower than a certain limit. Below that critical temperature the risk of false adhesion of the over metal’s layer is pretty high, and consequently the bad output of tubes with the layer’s detaching problems.  “We at MEC offer all of our customers a proper know-how to avoid such problems, along with complete support throughout our specialists and main distributors.”

from the electric-arc generator system with spray gun till CycloneAspiration and Pulsejet filtration by Cartridge elements, with CE marked and various ATEX compliant methods,” a spokesperson from MEC said. “The process is mostly in-line operated into the tube mill. It consists of creating a continuous short-circuit working condition using a pair of metal wires.” This technology results in the melting of the wires and contemporary melt

LB SIDERTECH Srl, a tube industry distributor of Metallising Equipment Co Pvt Ltd (MEC), is distributing custom made complete turnkey solutions for an important coating process in the tube industry. There are many coating processes in HF welded steel tube industry: the off-line colour coating; the in-line anti-oxidation oil coating; the off-line HDG (hot deep galvanising) process; and the gas – or the recently more popular – electric-arc spraying coating of the external scarfed area of pre- galvanised or pre-aluminised steel tubes, once the outside welded bead has been removed by mechanical trimming. After this process the over metal layer must be restored to ensure the proper initial features of such overlaid steel tubes. “We are the only company manufacturing the complete system

LB Sidertech Srl www.lbsidertech.com

Metallizing Equipment Co Ltd www.mecpl.com

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JULY 2020