Pre-fabrication Pipe

Pre fabrication welding pipe Size: DN400 Welding type: Welding Thickness: 20mm Pressure: High pressure Material: 316L/304/UNS31254 Application: Oil&gas industry/Chemical industry
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Pre fabrication welding pipe(Pre-fabrication Pipe)

Size: DN400

Welding type: Welding

Thickness: 20mm

Pressure: Low pressure

Material: 316L/304/UNS31254

Application: Oil&gas industry/Chemical industry


Background technology of stainless steel prefabricated welding pipe:


In the field of ship production, a large number of stainless steel pipe fittings, especially stainless steel pipes with flanges, are needed. Generally speaking, stainless steel pipes and stainless steel flanges are produced separately, then welded by equipment manufacturers to form stainless steel pipe fittings, and then delivered to the production equipment site for installation.


In the production process of ship pipeline manufacturers, a lot of welding work involving stainless steel pipeline and stainless steel flange is needed, especially with the development of pipeline technology, the wall thickness of stainless steel pipeline itself is thinner and thinner. In this case, it is more difficult to weld it to stainless steel flange, mainly because if the welding temperature is too high, it will lead to the crystal phase in stainless steel material The transformation will lead to material embrittlement and affect the strength of welding parts. In order to prevent the deformation of the welding materials, the welding parts need to be cooled. At present, argon arc welding is mainly used for stainless steel welding, which is assisted by continuous argon blowing on the welding parts, or even forming a special argon isolation area, but such cooling consumes a lot of argon and costs a lot; on the other hand, due to the general efficiency of argon cooling, it also needs to be cooled The reliability of welding parts can be fully guaranteed only when the measures of low current, low welding speed and intermittent welding are taken


 

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