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Straight seam steel pipe in addition to embroider method

Oct 27, 2018

In the process of oil and gas transmission pipeline anticorrosion construction, straight seam steel pipe surface treatment is one of the key factors determine the service life of the pipeline corrosion, it is a solid combination of anti-corrosion layer and straight seam steel pipe can be provided. Research study of the specialized institutions, the life of the coating depends on the quality of coating types, coating and construction environment factors, such as straight seam steel pipe surface treatment effects on coating life accounted for about 50%, therefore, should be in strict accordance with the specification on the coating on the surface of straight seam steel pipe requirements, continuously improve the straight seam steel pipe surface treatment.


Straight seam steel pipe in addition to embroider method:


1, the spray derusting


Spray derusting is driven by high-power motor jet high-speed rotating blade, steel shot, steel grit, wire section, minerals and other abrasive in motor power under the action of centrifugal force of the straight seam steel pipe surface spray processing, not only can thoroughly remove oxide, rust and dirt, and straight seam steel pipe under the action of abrasive violent impact and friction, also can achieve the required uniform roughness.


2, cleaning


Using solvent, emulsion steel surface cleaning, to remove oil, grease, dirt, lubricants, and similar organic matter, but it cannot remove rust, scale, such as welding flux on the surface of the steel, so only as auxiliary means in the anti government job.


3, tools, cleaning


Main USES steel wire brush tool for steel surfaces such as grinding, can remove loose scale, rust, slag, etc. Hand tools can achieve derusting Sa2 level, power tool cleaning can reach grade Sa3, if solid iron oxide adhered on the surface of the steel, tool cleaning effect is not ideal, anchor pattern depth of anticorrosion construction requirements.


4, pickling


Commonly used chemical and electrolytic pickling process, two methods do use only pipeline anticorrosion chemical pickling, can remove scale, rust, old coating, sometimes can be used as sandblasting derusting after reprocessing. Chemical cleaning while can make the surface reaches a certain cleanness and roughness, but the anchor lines shallow, and easy to damage to the surrounding environment.

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