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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Product Details


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



duplex steel reducer - 副本


We are a professional manufacturer of all projects even in low-pressure piping in various industrial segments. We can provide major cost advantages to you by using bending instead of elbows combined with effective industrial welding processes. More than 70% of the sold can be manufactured under factory conditions in a well-designed project that provides improved quality, shorter lead times, and a reduced allocation of resources on site. In general, the job can be done safer in the factory environment as opposed to the installation conditions. The materials used range from carbon steel to austenitic steel and up to DN2000 dimensions.


A wide range of stainless-steel tube fittings is required in the field of ship production particularly stainless-steel flanged tubes. Generally speaking, stainless steel tubes and steel flanges are made individually and then sold to stainless steel pipes by equipment suppliers, then supplied for installation at the production site.

A lot of welding activities involving the stainless-steel pipeline and the stainless-steel flange are essential in the manufacturing process of ship pipeline manufacturers, in particular with the development of pipeline technologies that reduce the wall space of the stainless-steel pipeline itself. In this situation, it is more difficult to weld the product to a flanging stainless steel, primarily because if the soldering temperature is too high, it can lead to a crystal phase in an inox steel material. The welding parts must be cooled to avoid deformation of the soldering materials. Argon Arc welding is usually primarily used for stainless steel welding, which is assisted by continuous argon blowing on the welding parts or even creating a special argon exclusion zone; such cooling, however, consumes a lot of argon and cost a lot; it needs cooling due to the general efficiency of argon cooling.


In the Electricity, petroleum chemical sector, piping is the main step towards fulfilling the project objective. STE offers Spool Shop manufacture range. AMS/ASTM, PED, JIS, GB, TS, and so on could be the content and manufacturing standard. STE can conduct material procurement, cutting, assembling, welding, painting, internal coating and spooling processes, production support, and spool field assembly. STE has 5G and 6G ASME/PED welders certified for third-party production and is long in the manufacture of High Strength Steel, Alloy, and different Stainless Steels, etc.


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