G-6 External Pressure Bellows Expansion Joint

Material: The bellows body is made of 304/316L/321 stainless steel. 304 is used for standard external pressure applications, 316L for corrosive external pressure environments, and 321 for medium-to-high temperature external pressure applications; The outer casing is made of carbon steel (cost-effective) or 304 stainless steel, effectively protecting the bellows and withstanding external pressure impacts; the sealing structure utilizes high-temperature and high-pressure resistant metal seals, ensuring excellent sealing performance and preventing media leakage, suitable for both high-pressure and negative-pressure applications; connection fittings can be selected in carbon steel or stainless steel as required to accommodate various pipe connections.

Applications: Specifically designed for industrial piping systems subject to external pressure (such as vacuum pipelines and negative-pressure flue gas pipelines) with significant axial displacement. Its core function is to absorb axial displacement while withstanding external pressure, preventing the bellows from collapsing under external pressure. Widely used in chemical vacuum reaction pipelines, metallurgical vacuum smelting pipelines, negative pressure exhaust systems, power plant negative pressure flue gas pipelines, and chemical vacuum distillation pipelines, it is particularly suitable for pipeline systems operating under negative pressure or vacuum conditions that require significant axial compensation.

Core Advantages: Strong resistance to external pressure; equipped with an outer casing to effectively withstand external and vacuum pressures, preventing bellows damage; High axial compensation efficiency, capable of absorbing significant axial displacement to reduce pipeline stress; resistant to high temperatures, high pressure, and corrosion, with materials customizable to specific operating conditions to accommodate complex external pressure scenarios; excellent sealing performance, with a metal sealing structure that eliminates media leakage and ensures safe pipeline operation; compact structure and easy installation, suitable for various vacuum and negative pressure pipeline systems.