180° elbow

The following is a detailed introduction about the 180 ° elbow:

Characteristics and Applications

Changing the flow direction: mainly used to change the direction of fluid or gas flow in the pipeline by 180 °, realizing the turning and relocation of the pipeline, such as in the case of limited space, allowing the pipeline to complete the round-trip layout in a smaller area.

Reduce resistance: Compared to other angle elbow combinations, 180 ° elbows can achieve turning while relatively reducing fluid resistance loss at the turning point, making fluid flow smoother, especially suitable for systems that require high fluid resistance.

Space saving: In some specific pipeline layouts, using 180 ° elbows can effectively save space and make the pipeline system more compact, such as in equipment intensive industrial plants or ship pipeline systems.

Manufacturing materials

Carbon steel: It has good strength and toughness, relatively low price, and is suitable for general industrial pipeline systems, such as water supply and drainage, HVAC and other fields.

Stainless steel: It has excellent corrosion resistance and high temperature resistance, and is suitable for industries such as chemical, food and beverage, pharmaceutical, etc. that require high pipeline materials. It can prevent pipelines from being corroded by the medium and ensure the purity of the medium.

Alloy steel: It combines the performance advantages of various metals and has higher strength, hardness, and corrosion resistance. It is commonly used in pipeline systems under harsh working conditions such as high pressure, high temperature, and high corrosiveness, such as the petrochemical and power industries.

manufacturing process

Hot pushing forming: Using a dedicated elbow pushing machine, core mold, and heating device, the billet placed on the mold is pushed forward by the pushing machine, heated, expanded, and bent into shape during the movement. It is suitable for manufacturing large-diameter 180 ° elbows.

Stamping forming: using a press machine to directly press and form a tube blank with the same outer diameter as the elbow in the mold, commonly used for the manufacturing of small batch, thick walled 180 ° elbows.

Welding forming: By welding two elbow sections or other fittings together, a 180 ° elbow is formed, usually used to make large-diameter elbows, such as elbows with a diameter of DN700 or above.

Installation and maintenance

Installation points: Before installation, it is necessary to check whether the specifications, models, materials, etc. of the elbow meet the design requirements, and confirm that there are no defects or damages. During installation, ensure that the elbow is aligned with the centerline of the pipeline, ensure welding or connection quality, and avoid eccentricity or misalignment. For large-diameter 180 ° elbows, additional support or fixing measures may be required to prevent deformation or displacement of the pipeline due to gravity or pressure.

Maintenance precautions: Regularly inspect the appearance of the elbow to see if there are any defects such as corrosion, wear, cracks, etc., especially in the welding and bending parts. For pipelines transporting corrosive media, attention should be paid to monitoring the corrosion of bends and taking timely anti-corrosion measures. At the same time, attention should be paid to the operating pressure and temperature of the pipeline system to avoid damage to elbows caused by overpressure and overtemperature operation.