Detailed Explanation Of Plate Flange Operation
Jul 30, 2025| Plate flanges are critical components in pipe connections. Their proper installation and operation directly impact the system's sealing and safety. The following is a standardized plate flange operation procedure that must be strictly followed to ensure project quality.
Preparation
Before operation, check that the plate flange and accessories match the specifications. Verify that the sealing surfaces are free of scratches, rust, and other defects, and clean the connection areas from oil and debris. Select bolts and gaskets (usually spiral wound gaskets or graphite composite gaskets) of appropriate specifications based on design requirements, and verify that the materials meet the operating requirements (such as pressure rating and corrosion resistance).
Installation Steps
1.Alignment and Initial Installation: Align the two plate flanges parallel to each other, ensuring that the pipe axes are concentric and the gaps are uniform. When inserting the gasket, center it to avoid offset and uneven force.
2.Bolt Tightening: Tighten the bolts in diagonal order, pre-tightening them to 30%-50% of the specified torque. After all bolts are initially secure, tighten them evenly again to the rated torque (refer to the manufacturer's specifications). It is recommended to use a torque wrench to control the force to prevent over- or under-tightening.
3.Airtightness Test: After installation, test the joints for leaks by injecting water or performing a pressure test. If leaks are detected, release the pressure and recheck the gasket position and bolt tightening.
Precautions
Avoid impacting the flange surfaces during operation. Bolt tightness should be rechecked regularly under high-temperature or high-pressure conditions. Also, follow the diagonal principle during disassembly to prevent flange deformation.
Proper plate flange operation is essential for the long-term and stable operation of the piping system. Construction personnel must strictly follow the procedures and ensure that each step meets technical standards.