Key Component of the Hydrostatic Pressure Test System — Watertight Bulkhead Penetration Fitting

Watertight Bulkhead Penetration Fitting — Selection Considerations

   A watertight bulkhead penetration fitting is a connecting equipment commonly used in underwater facilities such as ships and submarines. It maintains the sealing integrity of the connection to prevent water from entering the equipment, while ensuring the transmission of electrical or optical signals. In hydrostatic pressure test equipment, watertight bulkhead penetration fittings are typically installed on watertight, pressure-resistant pressure vessels (e.g., deep-sea environment simulation equipment) as interfaces for sensors and data acquisition devices. When image transmission is required, they can also provide routing for the camera's waterproof cable. As the watertight bulkhead penetration fitting plays a special role in hydrostatic pressure testing, what aspects should be considered in its selection?

  First, the appropriate material should be selected based on the test pressure and the working medium, ensuring that the fitting can withstand sufficient pressure and resist corrosion. Second, the penetration fitting must have excellent sealing performance to guarantee that no water leaks through. This requires the proper selection of sealing materials and structures — such as O-rings or other special sealing configurations — so that the fitting mates tightly and securely with the vessel. Third, the connection method should be chosen according to the test requirements, such as threaded connection, welding, or compression-type (ferrule) connection. These connection methods ensure that the fitting remains firm and reliable, and will not loosen or detach during the test. In addition, the structural configuration of the penetration fitting also needs to be considered. The configuration should be selected based on the structure of the test equipment and the available space, so that the fitting is easy to install and does not interfere with test operations. Before finalizing the design, safety performance should not be overlooked — it is another important factor in the selection of penetration fittings. The fitting must feature explosion-proof and electric-leakage-proof capabilities to ensure the safety of the test process.

  In summary, the selection of a penetration fitting involves multiple aspects, including material, sealing performance, connection method, size and dimensions, structural configuration, and safety performance. Selecting and designing based on the specific operating environment and requirements ensures the smooth and safe conduct of hydrostatic pressure testing.