45 Long Radius Elbow

 

Forming Technologies

Cold Pressing

Taking advantage of the characteristics of plastic deformation of metal, the microscopic convex peaks on the surface of the workpiece are flattened by applying pressure, thereby reducing the surface roughness. High pressure is applied in the mold cavity to make a compact molded blank. Including surface rolling, surface extrusion processing, etc. Suitable for polycarbonate, polypropylene and other materials. ​By cold pressing processing, the tensile strength and elastic modulus of the material can be improved.

 

Forging

Select the right metal material and perform necessary pretreatment, such as cutting, cleaning, etc.Heat the metal blank to a certain temperature to increase its plasticity and reduce deformation resistance. Under the blow or pressing of a forging hammer or press, the metal blank flows plastically in the mold to form the desired shape. The metal is freely deformed in all directions using impact force or pressure.Forged in special molds, the forgings produced are accurate in size.After the forging is complete, the forging is cooled to secure its shape and performance. Including heat treatment, machining and surface treatment, etc., to improve the performance and accuracy of forgings.

Mandrel Forming
Design appropriate shaft shape and size according to machining requirements. Precision metal processing technology, such as turning, grinding, etc., is used to produce high-precision mandrel. Install the manufactured mandrel on processing equipment such as lathes or grinders and debug it to ensure that it can support the workpiece stably. When processing thin-walled metal pipes, mandrel is often inserted into the inner cavity of the pipe, and radial support avoids deformation during turning, achieving high-precision processing.

A 45° long radius elbow is an important pipe fitting in the pipeline system to change the direction of the pipeline. Compared with other angle elbows, it can change the flow direction of the fluid in a relatively gentle manner. It is suitable for pipeline systems with high requirements for fluid resistance and require stable steering, such as petrochemicals, natural gas transportation, urban heating and other fields.

The specifications of 45° length radius elbows are usually expressed in nominal diameter (DN) and are in millimeters (mm). Nominal diameter is a standardized dimension mark. It is neither the inner diameter nor the outer diameter of the elbow, but an integer similar to the inner diameter. The purpose is to make pipe components such as pipe fittings, valves and other pipe components have universality and interchangeability. Common nominal diameters range from DN15 to DN1200 or above, covering a variety of application scenarios from small pipes to large industrial pipes. For example, in home water systems, DN15 - DN25 elbows may be used; in large petrochemical installations, DN200 or even larger diameter elbows may be used.

ASTM GB/T 12459-2017

★ Nominal diameter DN15 - DN200

★ Nominal diameter DN250 - DN600

• Austenitic SS: 304/304L, 316/316L, 321, 304H
• Duplex SS: S31803, S32205, S32750 (Chloride Resistance)
• Super Alloys: 904L, 254SMO, 317L (Extreme pH Environments)
• Compliant with ASTM/AISI/UNS standards (1.4301, 1.4401, etc.).

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