Metal Expansion Joints - ThomasNet

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Extreme Pressure High Operating Temperatures Refractory Lined Petrochemical and styrene process lines require expansion joints to handle extreme pressures and operating temperatures up to 1,700 O F (926 O C). Typically this application uses a combination of hinged and gimbal expansion joints that are designed to accommodate these extreme conditions. These expansion joints are commonly equipped with testing ports to detect leakage in between two plies bellows and/or have a refractory lining to eliminate erosion from catalyst. Petrochemical & Styrene Processing Refractory lining can be added for high temperature applications. The refractory lining is made to protect the steel parts from the high service temperature and from any erosive particles in the media. The lining is added to the expansion joint by welding in special stainless anchors. A form is made and liquidized concrete is added between the form and the steel parts. The refractory lining is often used in: • Steel Plants • Refineries • Copper and Aluminum Smelters • Cement Plants • Galvanizing Furnaces • Chemical Plants Universal tied expansion joints for stryene processing Refractory lining offers protection from abrasive media Cross-over expansion joint for Louisiana Petrochem Plant 12
Metallic expansion joints are an integral component of these complex refinery processes and their reliability can be significant to the refinery’s productivity and performance. An unexpected joint failure can represent millions of dollars in losses to a refinery. Continuous Catalytic Reforming (CCR) process or CCR platforming, is a process that produces feed for an aromatics complex or a high octane gasoline blending product and a significant amount of hydrogen. Developed by UOP, this octane improvement process requires the use of expansion joints to protect rotating equipment and vessels from thermal growth of ducting that contains a chlorine rich gas stream at temperatures up to 1,000 O F. Expansion joints are installed on equipment and piping throughout the CCR process including the feed/effluent heat exchanger, furnaces, reactors, the regenerator, crossover piping, compressors, and separators. CCR, FCCU, Flue Gas & Turbo Expanders Expansion joints used in FCCU service are some of the most critical and complex expansion joints manufactured. Fluid Catalytic Cracking Units (FCCU) operate at very high pressures and temperatures, consequently resulting in large thermal movements that must be absorbed by the expansion joint. Introduction of abrasive media (catalyst) requires additional protection to avoid gradual deterioration and premature failure of the expansion joint. The bellows membrane is the most critical element of the expansion joint assembly. Its relatively thin wall construction is designed for maximum flexibility, but must be protected against erosive catalyst and other corrosive media. Expansion Joints for FCC Service fall into three major categories: Cold Wall, Hot Wall Lined and Hot Wall Unlined. These are installed throughout the FCCU’s reactor, regenerator, riser, flue gas line, precipitators, recirculation catalyst lines and turbo expanders. High Temperatures High Pressures Abrasive Media The high temperature turbo expander is another important system within a refinery that can have a significant effect on production profits. The losses are extremely high to a refinery that must shutdown for major repairs to any equipment related to the expander such as the universal (double) hinged or gimbaled expansion joints installed within the turbo expander piping system. Various types of expansion joints and hardware (accessories) used in FCC, CCR and Turbo Expander equipment applications include: • Gimbled • Hinged • Pressure balanced • Pantographic linkages • Restrained universals • Cross-over assemblies Ducting in CCR process line can see up to 1000 O F Joints for FCC service are the most critical types Expansion joint for a turbo expander 13
Page 1 and 2: Metal Expansion Joints Flexible, Re
Page 3 and 4: P4. Introduction to Expansion Joint
Page 5 and 6: Connections, liners and covers that
Page 7 and 8: Multi-ply Bellows has two or more p
Page 9 and 10: Pipe penetration seals are used Pip
Page 14 and 15: 14 High Temperatures High Pressure
Page 16 and 17: 16 Customized Solutions Special Des
Page 18 and 19: Improve Reliability Increase Servic
Page 20: Technology that expands with you Ar

Metal Expansion Joints - ThomasNet

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