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Introduction and application of carbon steel elbow

Nov. 14, 2019

The carbon steel elbow is a metal pipe that changes the direction of the pipe on the carbon steel pipe. The connection method is threaded and welded. According to the angle, there are three most commonly used 45° and 90°180°, and other abnormal angle elbows such as 60° are also included according to engineering needs.

The carbon steel elbow is relatively simple to manufacture, and is mainly suitable for piping systems with corrosive media; the elbow and the flat welding ring can be made of different materials to reduce the cost of the elbow and improve the performance. The elbow sealing surface has a convex surface, a concave surface, and a groove surface.

National standard carbon steel elbow pipeline system for oil, gas, chemical, hydropower, construction and boiler industries. The groove sealing surface is suitable for occasions with flammable, explosive, toxic medium and high pressure. A gasket is a ring made of a material that is plastically deformed and has a certain strength.

The rigidity of carbon steel elbow is poor, suitable for occasions with pressure p4MPa; GB carbon steel elbow is more rigid and suitable for occasions with high pressure temperature.

The basic process of carbon steel elbow forming technology is: firstly welding a polygonal ring shell with a polygonal cross section or a multi-edge fan shell closed at both ends. After the internal pressure is filled with pressure medium, internal pressure is applied and the internal pressure is applied. The section gradually changes from a polygon to a circle, eventually becoming a circular ring shell.

There are three types of flange sealing surfaces: flat sealing surface, suitable for occasions where the pressure is not high and the medium is non-toxic; the concave and convex sealing surface is suitable for occasions with a slightly higher pressure.

Alloy steel elbows are widely used in pharmaceutical, dairy, petroleum, beer, beverage, chemical, water, and electric industries.

Carbon Steel Elbow

Carbon Steel Elbow

The following carbon steel pipe cap supplier tell everyone why carbon steel elbows can't touch water!

Carbon dioxide is a large amount of impurities in water, and it exists in a free form under normal conditions. The large amount of bicarbonate present in the water is also present in the form of carbon dioxide free at low pH, so that the average problem of carbonation occurs.

Therefore, the more carbon dioxide in the water, the more H+ is produced, the lower the pH of the water, the more acidic water that is erosive, and the erosion of the protective film formed on the surface of the carbon steel causes the carbon steel to erode.

If carbon dioxide is removed from the brine, the conductivity of the water will rise and the erosion will increase. Therefore, the demineralized water tank should have countermeasures to prevent the carbon dioxide from being dissolved into the water tank in the atmosphere. For example, N2 or the rest of the inert gas can be used to protect the water in the head space to prevent the carbon dioxide from contaminating the pure water.