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SS Dismantling Joints: Double Flange Design – A Comprehensive Guide for B2B Procurement

2026-05-12

What is a Stainless Steel Double Flange Dismantling Joint?
The Stainless Steel Double Flange Connection Dismantling Joint is a high-performance pipeline connector composed of key components including the body, sealing ring, gland, and expansion short pipe. On the basis of the original performance of the loose sleeve expansion joint, it adds a limit device and uses double nuts to lock the expansion amount, allowing the pipeline to expand and contract freely within the allowable range. Once the expansion amount exceeds the limit, the device will restrict it to ensure the safe operation of the pipeline.
This type of Stainless Steel Dismantling Joints is particularly suitable for pipeline connections with vibration, slopes, or bends, and is widely used in the loose sleeve connection of pumps, valves, and other accessories in industrial fields such as petroleum, chemical, water treatment, and power generation.
Latest Industry Technology Trends of Stainless Steel Dismantling Joints
The global pipeline connector industry is undergoing profound changes, and the technology of stainless steel dismantling joints is also constantly innovating to meet the increasingly strict industrial needs. Here are the latest technical trends worth paying attention to:
- Precision Manufacturing Upgrade: With the popularization of CNC machining and intelligent detection technology, the dimensional accuracy ofstainless steel Dismantling Joint has been greatly improved. The tolerance error of key components can be controlled within ±0.05mm, ensuring better fit and sealing performance during installation.
- Sealing Technology Innovation: New composite sealing materials (such as modified EPDM and PTFE) are widely used, which not only improve the corrosion resistance and high-temperature resistance of the sealing ring but also reduce the leakage rate to less than 0.001%, meeting the high requirements of food, pharmaceutical, and other high-purity industries .
- Integration of Limit and Force Transmission Functions: The latest Stainless Steel Force Transmission Joint and double Flange dismantling joint integrate limit and force transmission functions, which can transmit reverse axial thrust to the entire pipeline while limiting expansion, reducing the pressure thrust of connected parts and compensating for pipeline installation errors .
- Material Optimization: The application of high-grade stainless steel (such as 316L and 321) has become more widespread. These materials have better resistance to intergranular corrosion and hydrogen embrittlement, adapting to harsh working environments such as marine engineering and chemical corrosion
Correct Installation Steps of Stainless Steel Double Flange Dismantling Joints
The correct installation of Stainless Steel Double Flange Connection Dismantling Joint is crucial to ensure its performance. Please follow the following steps:
1. Check whether the model, specification, and material of the dismantling joint are consistent with the procurement requirements, and confirm that there is no damage to the product surface and sealing ring.
2. Align the dismantling joint with the flanges on both sides of the pipeline, adjust the connection length between the two ends of the product and the flange according to the on-site size.
3. Tighten the gland bolts diagonally in turn to ensure uniform force and tight connection between the product and the flange.
4. Adjust the limit nuts to lock the expansion amount, ensuring that the pipeline can expand and contract freely within the allowable range.
5. After installation, conduct a pressure test to check for leakage. If there is no leakage, the installation is completed. 

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