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residual stress Free Articles

Comparison of Characteristics Between ERW Steel Pipe and Spiral Submerged Arc Welded Steel Pipe

Both straight seam resistance welded steel pipes (ERW) and spiral submerged arc welded steel pipes (SSAW) can better meet the requirements of oil and gas pipelines. For medium-diameter ($630mm) steel pipes, ERW steel pipes are mostly used abroad. Spiral submerged arc welded pipes are generally only used for low-pressure fluid transmission, civil buildings, structures and piling pipes.

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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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Advantages and Disadvantages of Straight Seam Steel Pipe

Straight seam steel pipes can be divided into high frequency straight seam steel pipes (ERW Pipe) and submerged arc welded straight seam steel pipes (LSAW Pipe) according to the production process.

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Advantages and disadvantages of hot-rolled seamless steel pipe of large diameter

Large diameter seamless hot-rolled steel ingot casting can destroy tissue, grain refinement of steel and eliminate defects microstructure, so that the steel dense tissue mechanical properties are improved.

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Difference Between Hot Rolled and Cold Rolled Seamless Steel Pipe

Advantages and disadvantages of hot and cold rolled seamless steel tubes

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Hydrostatic Test of Spiral Steel Pipe (SSAW)

Hydrostatic test of spiral steel pipe (SSAW)

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Avoid Spiral Steel Tube Rupture in Long Pipeline

Spiral pipe with big diameter, high strength and practical features make it the first choice of many long-distance pipeline. With the spiral steel pipe rupture has a method for base metal and weld flattening test, guided bend test, a number of indicators of landing inspection toughness test, Charpy impact test. Not only for the gas pipeline has a higher toughness requirements for oil pipelines in recent years also made a high impact toughness requirements.

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Major Defects of Cold Drawn Seamless Stainless Steel Pipe

Tube drawing basic causes of defects are following below

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The Characteristics of Thermal Expansion Steel Pipe

Thermal expansion of steel is a processing method that is to process a large diameter steel pipes of small diameter pipe. Thermal expansion pipe somewhat less than some of the mechanical properties of hot-rolled steel.

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difference of hot rolled steel and cold drawn steel pipe

This artical expalin the difference of hot rolled steel and cold drawn steel pipe

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Welding heat treatment effect on stress corrosion resistance of welded steel pipe

Welded steel stress corrosion can occur only under certain circumstances, it has the following characteristics: only the presence of stress (tensile stress in particular) is to stress corrosion cracking.

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history of steel pipe

more information about history of steel pipe

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Introduction of Submerged Arc Welding Steel Pipe

some knowledge of Submerged Arc Welding Steel Pipe

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