Daily maintenance methods of steel pipes and pipe fittings

Recently,a customer contacted me and expressed his satisfaction with the products he had ordered several months ago,which are pipe fittings with anti-corrosion coating.He said these products can endure extreme weather conditions in his country.These is no doubt that anti-corrosion coating can greatly extend the function and service life of pipe fittings.So what should be done for daily maintenance of steel pipes and fittings?

API 5L X52 CLASS600 INSULATION JOINTT PIPELINE

API 5L X52 CLASS600 INSULATION JOINTT PIPELINE

So,here we have summarized several maintenance methods for steel pipes and fittings:

First,cleaning of steel pipes.Solvents and emulsifiers are used to clean steel surface in order to remove oil,grease,dust,lubricants and similar organic substances.However,they can not remove rust,oxide scale and welding flux on steel surface,so they are only used as auxiliary means in anti-corrosion production.

Second,usage of rust cleaning tools.Steel brushes and other tools are often used to grind the steel surface,which can remove loose or tilted oxide scale,rust,welding slag and so on.Manual rust cleaning tools can achieve Sa2 level and power tools can reach Sa level of rust removal.If the steel surface is adhered to a solid oxide scale,the effect of rust cleaning tool is not ideal,then the depth of anchor lines required for anti-corrosion construction can not be reached.

Third,acid pickling of steel pipes.In general,chemical and electrolytic methods are used for pickling treatment.Pipeline anti-corrosion only uses chemical pickling,which can remove oxide scales,rust and old coatings.Sometimes it can be used as reprocessing after derusting by sandblast. Chemical cleaning can reach the surface requirement of clean and rough degree,but its anchor lines are shallow and may cause environmental pollution.

To summarize,the good maintenance will be good for steel pipes & fittings,so it cannot be ignored.

Heat induction bends with FBE coating

Heat induction bends with FBE coating

During the process of using pipelines,the daily maintenance of steel pipes and fittings is very important.Through regular maintenance and inspection,the service life of pipelines and fittings can be greatly prolonged.With the sustained development of China’s economy and the vigorous development of energy industry,long-distance oil and gas pipeline is an important way of energy security.In the process of anti-corrosion construction of oil and gas pipelines,the surface treatment of steel pipe is one of the key factors determining the service life of pipeline anti-corrosion,and also the premise of the firm combination of anti-corrosion coating and steel pipe.It has been verified by the research institute that the useful life of the anti-corrosive coating depends on the type of coating,the quality of coating and the construction environment.What’s more,the surface treatment of the steel pipe affects the useful life of the anti-corrosive coating,which accounts for about 50%.Therefore,manufacturers should continuously explore,summarize and update the surface treatment methods of steel pipe in strict accordance with the requirements of the anti-corrosive coating specification for the surface of the steel pipe.

Flange coating with interthane-990-Polyurethane

Flange coating with interthane-990-Polyurethane

Our products are divided four series: 1,pipe fittings;2,forged flanges;3,steel pipes;4,customized and non-standard products,hundreds type of products by carbon steel,alloy steel and stainless steel.Hebei haihao Group owns advanced production lines.Products are manufactured by forging,cold pressing,cold forming,hot extrusion,heat treatment,polishing,rubbing,machining and chrome finishing.If you want to know more about our products,please contact us email:sales@haihaogroup.com

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