Seamless straight seam welded elbows

Elbows are pipe fittings used to change direction in piping systems, and their core characteristics and classifications are as follows:

1. Basic Definition and Function Elbow adjusts the direction of fluid or gas transmission by changing the direction of the pipeline, and is commonly used in plumbing, industrial pipelines, and mechanical and electrical equipment12. If its bending radius is ≤ 1.5 times the diameter of the pipe, it is defined as an elbow, otherwise it belongs to the bend.

2. Main classification Commonly used angles according to angles: 45°, 90°, 180° (U-shaped curve) are the most mainstream types Special angle: 60° and other non-standard angles need to be customized according to engineering needs Divided according to the production process of welding elbows: formed by the welding process, suitable for high-pressure scenarios Stamping/pushing elbows: using die stamping or hot pushing processes, the wall thickness is uniform and suitable for mass production Casting elbows: mostly used for complex shapes or special material requirements Long radius elbow according to radius of curvature (R=1.5D): low fluid resistance, suitable for efficient conveying systems Short radius elbow (R=1.0D): Space-saving, mostly used in low-pressure or confined environments.

3. Material and connection method Material: including carbon steel, stainless steel, alloy steel, cast iron and plastic, etc., different materials correspond to corrosion resistance, wear resistance and other characteristics. For example, manganese steel elbows are suitable for concrete conveying, while stainless steel is used in the food and pharmaceutical industry Connection methods: welding (most commonly used), flange connection, threaded connection, etc.

4. Application scenarios· Construction field: 45° elbow is used for drainage pipe obstacle avoidance, 90° elbow is commonly used in indoor water supply 8 Industrial field: Alloy elbows are used in high-pressure corrosive environments such as chemical industry and petroleum 56 Special requirements : Elbows with deflectors optimize the airflow distribution of the exhaust air ducts 10. 5. Technical standards and trends· Implementation standards: such as GB/T12459-2017, ASME B16.9 and other specifications for product quality. Technological developments: Processes such as hot push forming and induction heating have improved the manufacturing capabilities of large diameter and high-alloy elbows 511.

For example, welded elbows are preferred for high-voltage systems, while short radius elbows can be considered in space-constrained scenarios