🔍 Key Concepts

• High-pressure hydraulics require special sealing methods that can withstand both pressure and vibration • Flanged joints are usually sealed by a gasket or O-ring placed between the flange faces, not by the bolts alone • Some materials (like certain rubbers) and fittings (like elbows, threaded joints) have pressure and application limits in hydraulic systems

💭 Think About

• Which option actually creates a seal between the flange faces rather than just strengthening or redirecting the piping? • In high-pressure systems, are threaded connections or welded circumferences typically relied on for the primary seal at a flange? Why or why not? • Think about which material or method is commonly designed to deform slightly under pressure to maintain a tight seal without relying on thread sealants.

✅ Before You Answer

• Check which choice describes a designed sealing element at the flange face rather than a general piping practice • Consider whether neoprene and Teflon are suitable for very high-pressure hydraulic applications at flanged joints • Verify that the correct method is one you would find inside the flange joint rather than on the outside of the pipe routing (like elbows).