Henary Lee

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Optimum efficiency control of high frequency welded pipe in welding process

In most cases, optimized welding process, power loss can be reduced 50% and can improve the welding quality, reduce downtime, increase production.

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Stress on the trench corrosion of high-frequency straight seam resistance welding pipe

Trench etching is generally believed that acute heat in the welding process, the results of local tissue metal and chemical change caused by quenching.

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Technology of straight seam high frequency resistance welded steel pipe

Factors that affect the raw material for the steel pipe welding quality affect the quality of raw materials are mainly steel mechanical properties unstable surface defects and strip geometry deviation big three aspects, therefore, we should focus on these three aspects of control.

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Quality accident analysis of high frequency weld pipe

Accidents often occur weld quality in our daily production, weld quality accident we do the analysis of the following aspects.

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Thick-walled spiral pipe eddy current testing works principle

AC electromagnetic coil eddy current testing to the metal surface of the member induced eddy current non-destructive flaw detection technology. It is suitable conductive material, including defects in ferromagnetic and non-ferromagnetic metal material component testing.

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Fracture characteristics of ssaw steel pipe

Spiral fracture propagation direction depending on whether the spiral pipe for CVN value anisotropic size.

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Anti-corrosion coating method of spiral steel pipe

Anti-corrosion coating method of spiral steel pipe of is generally used in anti-corrosion coating.

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Wall thickness accuracy of spiral steel pipe

Spiral steel pipe typically occurs wall thickness errors, in order to avoid these problems and to obtain more accurate pipe, always pay attention in production process.

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Austempering of Seamless Steel Tube

Austempering is to reduce the deformation of seamless steel tube and began to crack one of the effective method of quenching, but how to correctly use the process method is based on seamless steel tube material, size, hardness and toughness, the requirements of the deformation.

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Cold drawn seamless steel price fluctuations

By some recent large steel mills have raised, cold drawn seamless steel prices and raw material prices, driven by the support, the majority of the research object represents the next two weeks the market price is likely to remain stable or upward shocks, most objects shipments expected to remain stable.

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3PE anticorrosion pipe market advantages and problems in Cangzhou

Early 1980s, 3PE anti-corrosion steel is widely used in Europe first, praised by users, it is the most used line coating system.

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Seamless steel pipe heat treatment residual stress

To eliminate error ellipse size and other defects of seamless steel tubes produced by rolling and heat treatment, generally using the sizing process. As the final production of seamless steel pipe manufacturing sectors sizing process determines the size and geometry of the tubular body, and also affect its mechanical properties.

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Pipe thermomechanical treatment

The pressure processing and heat treatment operations combine to make the forming process to obtain a final performance with a unified kind of process methods.

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Oil Casing heat treatment performance

Heat treatment of oil casing use continuous automatic production, product performance testing by sampling of ways after the heat treatment, can not be 100% product performance validation, strict control of all the relevant factors in the production process of heat treatment is the key to a stable and reliable pipe performance guarantee.

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Welding principle of plastic deformation for seamless steel pipe

Seamless heat treatment after welding is a new technology to eliminate residual stress, this technology can improve the metal's resistance to stress corrosion, and heat treatment temperature is higher, the elimination of residual stress, the better, of course, the heat treatment or can effectively improve the corrosion resistance of welded steel pipe. Try to make the weld metal biphasic organization, content to make ferrite controlled more than three percent, five percent, while the need yo selection of quality basic coated electrodes, so that you can limit the welding seam metal three kinds of S, P, C and other content.

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