The embroidery method of straight seam submerged arc welding


The industry are clear in the oil, gas pipeline anti-corrosion construction process, large-diameter submerged arc welded pipe surface treatment is the decisive factor in the life of pipeline corrosion one of the key elements, is the coating and large diameter submerged arc welded pipe can be strong ties Of the premise.

1, cleaning

Application solvent, emulsion cleaning steel appearance, in order to reach the removal of oil, grease, dust, smooth agent and similar organic matter, but it can not remove the steel surface rust, oxide, welding, etc., and therefore only in the anti-government work as assistant Tricks, but also the most simple to maintain one of the tricks.

2, pickling

Common use of chemical and electrolytic two ways to do pickling treatment, pipeline corrosion only chemical pickling, can remove the oxide, rust, old coating, and sometimes can be used as a sand blasting re-disposal. Chemical cleaning of course to make the appearance to reach the inevitable degree of cleanliness and roughness, but the anchor line shallow, and easy to contaminate the surrounding situation, the United States Steel Control Manufacturing Co., Ltd. is not very recommended to see this approach.

3, something rust

The main use of steel brush and other things on the surface of the steel polished, you can remove the loose oxide, rust, welding slag and so on. Hand tools to rust to reach Sa2 level, power things rust can reach Sa3 level, if the steel surface attached to a solid oxide scale, things rust results do not think, not to anti-corrosion construction requirements of the anchor profile depth, is a kind of Compared to the original method of derusting.

4, radiation rust

Radiation derusting is through the high-power motor driven radiation blades high-speed reverse, so that steel balls, steel grit, wire segment, minerals and other abrasive in the strong centrifugal force of the effect of the submerged arc welded pipe surface radiation treatment, not only can completely eliminate Oxide, rust and dirt, and Longitudinal submerged arc welded pipe abrasive impact and frictional force in the fierce effect, but also to achieve the required average roughness, is a more perfect method of derusting, the virtues of steel control Limited strongly recommended. Radiation rust, not only can expand the physical appearance of the tube adsorption effect, and can enhance the appearance of the coating and mechanical adhesion of the tube. Therefore, the radiation rust corrosion is the pipeline corrosion method of fantasy. In general, shot blasting rust is mainly used for pipe exterior appearance disposal, shot blasting rust mainly used for submerged arc welded pipe surface surface disposal.

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