Small-diameter welded pipes mostly use straight seam welding, and large-diameter welded pipes mostly use spiral welded pipes to bend the hot-rolled strip into a spiral shape, and perform inner and outer seam welding through submerged arc automatic welding to form spiral welded pipes. The difference between spiral welded pipe and ordinary steel pipe specifications!

The difference between spiral welded pipe and ordinary steel pipe

According to the welding shape, it can be divided into straight seam welded pipe and spiral welded pipe. According to the welding method, it can be divided into arc welded pipe, high frequency or low frequency resistance welded pipe, gas welded pipe, furnace welded pipe, welded pipe, etc. Electric welded steel pipe is used in oil drilling and machinery manufacturing.

Welded steel pipes have lower cost and higher production efficiency than seamless steel pipes.

The production process of ordinary steel pipes is simple, the production efficiency is high, the cost is low, and the development is fast.

The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe, and the same wide billet can also be used to produce the welded pipe with different diameters, and the narrow billet can be used to produce the large diameter welded pipe.

However, compared with the same length of joint pipe, the welding length is increased by 30~100%, and the production speed is low.

Spiral welded pipe refers to a steel pipe with seams on the surface formed by bending and deforming a steel strip or steel plate into a circular, square or other shape.

According to the welding method, it can be divided into arc welded pipe, high frequency or low frequency resistance welded pipe, gas welded pipe, furnace welded pipe, welded pipe, etc.

According to the welding shape, it can be divided into ordinary steel pipe and spiral welded pipe.

Spiral welded pipes are used in oil drilling and machinery manufacturing.

Spiral welded pipes can be used for water and gas pipelines, etc. Spiral welded pipes are used for oil and gas transportation, pipe piles, bridge piers, etc., and large-diameter ordinary steel pipes can be used for high-pressure oil and gas transportation.

Therefore, the small-diameter welded pipe mostly adopts straight seam welding, and the inner seam and outer seam are welded by automatic submerged arc welding. .

Welding characteristics of spiral welded pipe: 1) As long as the forming angle is changed, steel pipes of various diameters can be produced with the same width of strip steel; 2) Due to continuous bending and forming, the length of the steel pipe is not limited; 3) Because the welding spiral is evenly distributed in the steel pipe On the circumference, the steel pipe has high dimensional accuracy and high strength; 4) The size is easy to adjust, which is suitable for the production of small batch and multi-variety steel pipes.

The above is the difference between the spiral welded pipe and the ordinary steel pipe. If you want to know more, please feel free to contact us!