The difference between stainless seamless steel pipe and stainless welded steel pipe

Date:2024-03-28Tags:Stainless seamless steel pipe, Stainless Welded Steel Pipe, Seamless pipe

Stainless steel pipe is a common pipe, an economical cross-section steel, and an important product in the steel industry. It is mainly divided into two types: stainless seamless steel pipe and Stainless Welded Steel Pipe. It can be widely used in life decoration and industry. It is available on the market. Many people in the world use it to make stair handrails, window guards, railings, furniture, etc. The following will compare stainless seamless steel pipe and Stainless Welded Steel Pipe from many aspects to better understand their differences.

Stainless Seamless Steel Pipe

Pipe making process:

Stainless seamless steel pipes are formed by heating the stainless steel billet to a certain temperature, forming it into a tubular shape under the action of a penetrating rod, and then going through multiple rolling and drawing processes. This manufacturing process makes the seamless pipe have smooth internal and external surfaces, precise dimensions, no welds, and can withstand harsh conditions such as high pressure and high temperature.


Stainless Welded Steel Pipes roll a stainless steel plate into a tube shape, and then weld the edges of the plate into a pipe body through a welding process. Finally, the finished product is obtained through straightening, cutting and other processes. The manufacturing process of welded pipes is relatively simple, but the presence of welds may affect the pressure resistance of the pipes.


thickness:

Stainless seamless steel pipes the raw steel strips are all rolled, and the thickness is relatively uniform. The finished welded pipe specifications include thin and thick pipes. However, the thickness of Stainless Welded Steel Pipes is often uneven and they are all relatively thick pipes.


Features:

Since stainless seamless steel pipes have no welds, they have good sealing and corrosion resistance, and are suitable for applications requiring high pressure, high temperature, and no leakage, such as petroleum, chemical industry, aerospace and other fields.

Although the manufacturing process of Stainless Welded Steel Pipes is simple, due to the existence of welds, welding deformation and uneven quality of internal and external surfaces are prone to occur, so they are generally used in situations where general pressure requirements and corrosion resistance requirements are not high.


Performance and price:

Stainless seamless steel pipes are much higher than welded pipes in terms of corrosion resistance and pressure and high temperature resistance. Moreover, the production process of seamless pipes is more complicated, and its price is more expensive than welded pipes.

With the improvement of welded pipe manufacturing technology, the mechanical properties and mechanical properties of Stainless Welded Steel Pipes are gradually approaching seamless pipes.


Application:

Because stainless seamless steel pipes have high strength and pressure resistance, they are suitable for pipeline systems under high pressure, high temperature, and harsh environments, such as oil and natural gas transmission pipelines, chemical equipment pipelines, etc.

The existence of welds, Stainless Welded Steel Pipes can meet the usage requirements under normal pressure and general environment. They are mainly used in construction, decoration, bicycles, automobiles and other fields. It is widely used in the field of decorative welding and is also used in medium and low pressure fluid pipes and other fields.


Stainless steel pipes are widely used in every country's national economy, from pipes in nuclear power plants and ships to stair handrails in residential buildings. They are important products for the steel industry,Common materials include 201/304/316L, etc.In general, there are obvious differences between stainless seamless steel pipe and Stainless Welded Steel Pipe in terms of manufacturing process, performance characteristics and applicable occasions. The selection of appropriate pipe materials should be comprehensively considered based on specific usage requirements and environmental conditions to ensure the safe and reliable operation of the pipeline system.


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