Top Site Net Features | Register | Login

Big difference in between Spiral Pipe and Carbon ERW Steel Pipe

Spiral pipes and Carbon ERW steel pipes are presently widely employed in our nation. Spiral pipes and longitudinal electric resistance welded pipes (ERW) are widely used for oil and normal fuel transportation. There is a distinction among these two kinds of pipes, which are generally the distinction amongst the manufacturing procedure and the difference among the raw materials. These two distinctions make the spiral pipe and the longitudinal resistance welded pipe have a large variation in the scope of use. Next, the spiral pipe (SSAW steel pipe) manufacturer will talk to you about the certain distinction in between spiral pipe and ERW pipe.

1. The big difference in production procedure
The ERW longitudinal resistance welded pipe is a scorching-rolled coil formed by successive rolls, utilizing the skin effect and proximity impact of higher-frequency recent to melt the edge of the coil, and pressure welding is performed beneath the effect of the squeeze roller force. make. Consequently, the residual tension of ERW straight seam electric resistance welded steel pipe is relatively tiny. Soon after welding seam heat treatment, sizing, straightening, and hydraulic stress, the residual anxiety is more launched and lowered. Practice has proved that the residual anxiety of ERW straight seam resistance welded pipe does not have an effect on the steel pipe during storage and use. Without having any welding wire, the physical properties and chemical composition of the weld are fully constant with the plate. please click the following article The high quality of ERW pipe depends on the good quality of the sheet.

The steel plates for spiral pipes are welded together with welding wire via the spiral rotation of the unit. Following the steel plates are spirally rotated, the geometric anxiety is a lot more messy, and some even reach the yield restrict of the steel plate. The spiral pipe will have a bigger residual tension in the potential, and its residual stress Is tensile stress. After the steel pipe is subjected to inner pressure, the pipe wall also has a circumferential tensile stress, and the two superimposed, which weakens the steel pipe's bearing capability. It is even far more insecure for the duration of use. The steel plates are welded together by welding wires containing chemical elements, and bubbles and sizzling cracks in the weld bead are prone to happen for the duration of the welding procedure. Make the weld and the base metal have obvious distinctions in physical properties and chemical composition. It is extremely simple to cause wonderful concentrated pressure at the joint of the weld and the base metal. For the duration of the welding procedure, the heat influence is excellent and the hardness is large.

two. Materials variation
The raw supplies utilized in ERW steel pipes are all sizzling-rolled coils created by typical large factories, and their chemical composition and bodily properties are relatively secure.

three. Acquisition price and difficulty of acquisition
The advantages of spiral pipes made by massive steel pipe plants in the petroleum and petrochemical method are mainly concentrated in the manufacturing of massive-diameter steel pipes, and the manufacturing expense is fairly reduced. Nevertheless, for steel pipes with small and medium diameters (à114mm~à355.6mm), the forming expense is greater, which is even 8%~15% higher than ERW steel pipe.

Big-scale spiral pipe factories usually do not generate tiny and medium-caliber spiral pipes, which tends to make it tough to obtain. The little and medium diameter ERW steel pipes are really easy to obtain due to the fact of the huge variety of producers.

The over is the big difference among spiral pipe and ERW pipe. These two varieties of steel pipes have produced wonderful contributions to my country's oil and organic gas transportation. Not only in China, but also abroad, these two sorts of pipes are also broadly used.

Suggestions: ASTM A53 Gr.B is the grade in ERW large frequency welded pipe, divided into A and B grades. ASTM is only a set of specifications. ASTM steel pipe A53 A corresponds to the Chinese normal GB8163 raw material is 10# steel, and A53 B corresponds to the Chinese regular GB8163 raw material twenty#.

For instance: ASTM (standard) A53 (grade) gr is grade (abbreviation of grade) b (grade B)

About This Author


Harris MoodyHarris Moody
Joined: January 7th, 2021
Article Directory /

Arts, Business, Computers, Finance, Games, Health, Home, Internet, News, Other, Reference, Shopping, Society, Sports