Manufacturing Process
The manufacturing process of butt-welded 45 degree elbow mainly includes the following steps:
● Material selection: Carefully select suitable materials based on the working pressure, temperature conditions, transmission medium, and other key elements of the pipeline system, such as stainless steel, alloy steel, carbon steel, etc.
● Precise cutting: Strictly follow the design drawings and dimensional specifications to accurately cut the selected materials to the required length and shape.
● Forming process: With the help of hot pressing, cold processing or hot processing technology, the material is precisely bent into a 45 degree angle shape.
● Welding connection: High quality butt welding technique is adopted, and both ends of the elbow are connected to the pipe system to guarantee the stability and sealing of the joint.
● Strict inspection: Conduct comprehensive quality inspection on the welded elbows, covering multiple aspects such as appearance inspection, size verification, pressure testing, etc., to ensure that the elbows fully comply with relevant standards and requirements.The function of a 45° elbow is the same as a 90° elbow, but the measurement of dimensions is different to that of the 90° elbow.
The radius of a 45° elbow is the same as the radius of the 90° LR (1.1/2D). However, the center to face dimension is not equivalent to the radius as in 90° LR elbows. This is measured from each face to the point of intersection of the center lines perpendicular to each other, distances B on the image. This is due to the smaller degree of bend. Short radius 45° elbows are not available.
Standards
The most applied version is the 90° long radius and the 45° elbow, while the 90° short radius elbow is applied if there is too little space. The function of a 180° elbow is to change direction of flow through 180°. Both, the LR and the SR types have a center to center dimension double the matching 90° elbows. These fittings will generally be used in furnesses or other heating or cooling units.
Dimensions, dimensional tolerances and more images, can be found in the main Menu Fittings.
