Making square compensator (rectangular bellows compensator) is a complicated process, which involves many aspects such as material selection, design calculation, processing and manufacturing. Here are the detailed production steps and technical points:
1. Design and Planning
Requirements analysis: Determine the size, compensation amount, working pressure and temperature of the compensator according to the specific requirements of the pipeline system.
Design drawings: Draw detailed design drawings, including bellows shape, size, connection mode, etc., and conduct stress analysis and life prediction.
2. Material selection
Bellows material: Stainless steel or corrosion-resistant alloy steel is usually used, ensuring that it has adequate strength and corrosion resistance.
Connector material: The flange or other connecting parts should be made of materials matching with the bellows to ensure the consistency and reliability of the whole structure.
3. Bellows forming
press forming: For small bellows, it can be stamped and formed at one time by hydraulic press using special molds.
Roll forming: Suitable for larger diameter bellows, gradually forming the desired corrugated shape by multi-pass roller pressing.
Welding forming: Weld the prefabricated corrugated ring pieces one by one to form a complete corrugated pipe. This method is suitable for bellows of special shape or large size.
4. Welding and Assembly
Welding of Bellows to End Connections: Advanced welding technology such as automatic argon arc welding is adopted to ensure that the welding seam is of excellent quality and has no defects such as pores and cracks.
Integral assembly: Assemble the bellows with flanges or other forms of connectors at both ends, taking care to maintain coaxiality and parallelism to avoid additional stress during installation.
5. Inspection and Testing
Appearance inspection: Carry out a comprehensive cosmetic inspection of the finished product to ensure that there are no obvious defects such as scratches, dents, etc.
Dimensional inspection: Measure critical dimensions to ensure compliance with design requirements.
Pressure test: Conduct water pressure or air pressure test according to relevant standards to verify the sealability and pressure bearing capacity of the compensator.
Leak detection: Detect for tiny leaks using a helium mass spectrometer or other methods.
6. Surface treatment
Anticorrosive coating: In order to improve corrosion resistance, an appropriate anti-corrosion coating can be applied on the exterior.
Insulation Layer Setup: Thermal insulation can also be added to reduce heat loss if the application environment requires it.
7. Marking and Packaging
Identification information: Mark the necessary information such as product model, specification, manufacturing date, etc. on the compensator.
Packaging protection: Use proper packaging method to prevent damage during transportation.
Precautions
Precise control of welding process: Welding is one of the key processes that affect the quality and service life of corrugated pipe. It is necessary to strictly control the welding parameters to ensure the welding quality.
Consider installation space: When designing, the space limitation of on-site installation should be fully considered to ensure that the compensator can be smoothly installed in place.
Follow relevant standards: The whole production process should strictly abide by the relevant national and industry standards and specifications to ensure reliable product quality.
The above is the square complement General manufacturing process and technical points of compensator.