Alloy thick – wall seamless elbow is a kind of pipe fitting for high – pressure pipe bends. In the high pressure piping system used in the total pipe fittings, accounts for about 80%. The wall thickness of the general high pressure elbow is thicker than that of the ordinary elbow, and the high pressure strength of the alloy thick wall seamless elbow manufacturer or material is higher than that of the ordinary elbow. There are three methods: butt welding, socket welding and wire connection.

Alloy thick wall seamless elbow is generally used in high temperature and high pressure pipeline, such as petroleum, chemical, electric power, metallurgy and other industries engineering pipeline. Alloy thick wall seamless elbow is more expensive than ordinary carbon steel elbow. Alloy thick – wall seamless elbow production processes include hot – push forming, stamping forming and other forming methods. The hot pushing method adopts special elbow pushing machine, core die and heating device, so that the blank on the mold moves forward under the push of the pushing machine, and is heated, expanded and bent during the movement. The stamping forming of the elbow is made of a tube blank equal to the outside diameter of the elbow, which is directly pressed by a press in the die. Before stamping, the tube blank is placed on the lower die, and the inner core and end die are loaded into the tube blank. The upper die moves downward to press the tube blank, and the elbow is formed by the constraint of the outer die and the support of the inner die. Stamping elbow is divided into cold stamping and hot stamping two types, usually according to the material properties and equipment capacity to choose cold stamping or hot stamping. Alloy thick wall seamless elbow surface can be painted, galvanized and other anticorrosive treatment, can also be polyurethane insulation treatment.

Summary of advantages of alloy thick wall seamless elbow:

1. Hygiene: The material is completely composed of carbon and hydrogen without any toxic heavy metal salt stabilizer. The hygiene performance of the material has passed the inspection of the department.

2, light weight: the density of stamping elbow is 0.89-0.91g/cm, only one tenth of the steel pipe. Because of the light weight, can greatly reduce the industrial transportation costs and installation of the construction intensity.

3, good heat resistance: when the working water temperature is 70 degrees, the softening temperature is 140 degrees.

4, good corrosion resistance: in addition to a few hydrogenating agents, corrosion resistance to a variety of chemical media, with excellent acid resistance, alkali resistance, corrosion resistance, will not rust, will not corrosion, will not breed bacteria, no electrochemical corrosion.

5, good thermal insulation: due to the low thermal conductivity of the material, the thermal conductivity of 20 degrees Celsius is 0.21-0.24W/mk, much smaller than the steel pipe (43-52W/mk), purple steel pipe (333W/mk), so PP-R pipe insulation good.

6, high impact: due to the impact strength performance than other solid wall pipe has been significantly improved, its ring stiffness is equivalent to 1.3 times of solid wall.

7. Long service life: the service life of the pipe can reach more than 50 years under the rated service temperature and pressure, with anti-ultraviolet and anti-radiation, which can make the product fade.

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