Product details description

Elbow production technology and application

What technologies are needed to produce elbows? Next, I will give you a brief introduction. Elbow is a pipe fitting commonly used in hot water equipment. It is used to connect the pipe bends and change the direction of the pipe. Other names: 90-degree elbow, right angle elbow, love and elbow, stamping elbow, limit elbow, institutional elbow, welding elbow. Purpose: to connect two of the same nominal diameter or different nominal diameter of the pipeline, so that the pipeline can be 90 degrees, 45 degrees, 180 degrees and a variety of angles of the turn.

Bending radius less than 1.5 times the diameter of the pipe for the bend, less than 1.5 times the diameter of the pipe 1.5 times the diameter of the pipe for this section of the bend folding modification of the pipeline device commonly used connectors. Connect two pipes of the same or different nominal diameters, so that the pipe in the angle of rotation. Rated pressure of 1-1.6 MPa. Technical requirements as fittings. Mostly used for welding.

In order to improve the quality of elbow welding, elbow end is grooved, leaving an angle, this requirement is also strict, how thick the side, how many angles and the margin of error is the rule. Appearance quality and mechanical properties are basically the same as the pipe. In order to facilitate welding, the steel grade of the fittings is the same as that of the connecting pipe.

That is to say, all the elbows are subject to external surface treatment, surface iron oxide sheet by shot blasting treatment, this is for export demand, but also to facilitate transport and avoid rust and oxidation, exports and other small fittings need to be made into a wooden box, which is the requirement of packaging.

General alloy elbow made of bronze in the general water pipeline is more commonplace alloy elbow is a variety of elbows of a class of unified see, but with the improvement of living standards, a lot of water pipelines are changed to stainless steel elbow.

Manganese steel alloy elbow because manganese steel has the ability to withstand impact, extrusion, material abrasion, etc., is usually used in the concrete pipeline, slurry pipeline and other wear and tear in the pipeline is more serious.

High manganese steel alloy elbow is applied in the fluid flow is more intense, the impact is stronger in the pipeline; nickel steel alloy elbow is usually used in the oxidation of acid (nitric acid, sulphur alloy elbow is a variety of elbows of a class of unity), such as the room temperature of the transport pipeline, but in the reduction of acid (hydrochloric acid, dilute sulphuric acid, etc.) of the transport pipeline will be severely corroded, unless the concentration of hydrochloric acid is very low; maraging elbows in the 650 ° C or less! Have high high temperature strength, resistance to water vapour corrosion power, but poor weldability.

Therefore, it is often used in high temperature water vapour transmission pipelines, water and gas pipelines.

Alloy elbow in the application process should pay attention to the problem, because the alloy elbow is a variety of elbows of a class of unity for the sake of its application, and application life, put to improve the toughness of the pipeline lining, impact resistance, so that the alloy elbow in the electric power, mining, metallurgy, and other industries, material transport, output, are used in the close proximity of high-pressure conveying are able to withstand considerable pressure.

Carbon steel elbow is to change the direction of the pipeline on the carbon steel pipeline metal pipe fittings. Connection methods are wire fastening and welding. According to the angle, there are 45 ° and 90 ° 180 ° three commonly used, in addition, according to the needs of the project also includes 60 ° and other non-normal angle elbow.

Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. Connected with the pipe in the following ways: direct welding (commonly used) flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection. According to the production process can be divided into: welded elbow, stamping elbow, push elbow, casting elbow, etc.. Other names: 90-degree elbow, right-angle bend, love and bend.

(1) does not require billet as raw material, can save the cost of pipe making equipment and moulds, and can be arbitrary large diameter and relatively thin wall thickness of carbon steel elbow.

(2) billet for flat or curved surfaces can be extended, and thus simple material, easy to assemble and weld.

(3) Because of the above two reasons, can shorten the manufacturing cycle, production costs. Because it does not require any equipment, especially suitable for on-site processing of large carbon steel elbow.

(4) Carbon steel elbow is suitable for piping series in petroleum, chemical, water and electricity, construction and boiler industries.

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