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Class 150 Long Weld Neck Flanges are widely used for extended reinforced sealing connections of shell nozzles on low-pressure high-temperature equipment such as heat exchangers and reaction vessels.
Class 300 Long Weld Neck Flanges are suitable for nozzles of medium-temperature and medium-pressure heat exchangers and pressure vessels, which can reduce thermal stress and improve the sealing stability of equipment.
Class 600 Long Weld Neck Flanges are applied to medium-high pressure and high-temperature pressure vessels and heat exchange equipment to relieve thermal deformation stress and ensure long-term sealing performance.
Class 900 Long Weld Neck Flanges are applied to high-temperature and high-pressure reactors and high-pressure heat exchange equipment, which can effectively buffer thermal stress and ensure reliable sealing under high-pressure working conditions.
Class 1500 Long Weld Neck Flanges are suitable for reinforced sealing connections with long necks on high-temperature and high-pressure equipment such as hydrogenation units and high-pressure reactors.
Class 2500 Long Weld Neck Flanges are used for ultra-high pressure hydrogenation reactors and supercritical thermal equipment to buffer thermal stress generated under high temperature and high pressure and maintain stable sealing performance.