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Upholding the corporate spirit of “Integrity, Harmony, Pragmatism, and Innovation,” we remain committed to a business philosophy that puts people first, embraces technological innovation, and emphasizes integrity and pragmatism.
Let’s chat about the knowledge of using bends.
Release time:
Apr 14,2022
Bends are pipe fittings used to change the direction of pipelines. They can be found in areas where pipes intersect, turn, or go around beams. Bends produced by bending have advantages such as good flexibility, high-pressure resistance, and low flow resistance. Consequently, they are frequently used in construction. The main types of bends include bends at various angles, U-shaped bends, return bends (also known as "S-bends"), and curved bends.
Bends are pipe fittings used to change the direction of pipelines. They can be found in areas where pipes intersect, turn corners, or go around beams. Bending pipes through hot forming offers advantages such as excellent flexibility, high-pressure resistance, and low flow resistance. Consequently, they are frequently used in construction. The main types of bends include bends at various angles, U-shaped pipes, return bends (also known as "S-bends"), and curved bends.
A bend is a pipe fitting with an arbitrarily curved angle, used during pipe bending operations. The radius of curvature of a bend is denoted by R. The larger the value of R, the greater the curvature of the pipe and the smoother the bend; conversely, when R is smaller, the curvature of the pipe is less pronounced and the bend is sharper. The distance between the centerlines at the curved ends of a reciprocating bend is called the height of the reciprocating bend, denoted by the letter h. A reciprocating bend is a pipe fitting that features two bending angles (typically 135°).
A U-shaped tube is a semi-circular pipe fitting. The distance d between the centerlines at both ends of the tube equals twice the radius of curvature R. A U-shaped tube can replace two 90° elbows and is commonly used to connect two circular finned radiators. An arc bend is a pipe fitting with three bending angles: the side angle is 135°, and the central angle is typically 90°. Arc bends are used to go around other pipes, while arc bends are generally employed for piping installations in sanitary fixtures that provide both hot and cold water supplies.
The dimensions of a bent pipe are determined by the pipe diameter, the bending angle, and the bending radius. The bending angle should be specified based on the drawings and the actual conditions at the construction site. Then, a template is fabricated. The pipe fittings are bent according to this template, and the bending angle of the bent fittings is checked against the template to ensure compliance with the requirements. The template can be made by bending round steel bars; the diameter of the round steel bar should be selected according to the size of the pipe being bent—typically ranging from 10 to 14 mm. The bending radius of the bent pipe should be determined based on the pipe diameter, design requirements, and relevant regulations; it should neither be too large nor too small.
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