In vapour withdrawal methods, which option is used for a connection?

In vapour withdrawal methods, which option is used for a connection?

• A. A POL thread
• B. Hoses rated at 100 psig
• C. A standard water pipe fitting
• D. A male thread on the withdrawal valve

Answer: (B)

Flexible hoses rated for gas service are the connection method used in vapour withdrawal. When gas is drawn as a vapor, the system needs a flexible, leak-tight interface that can handle the pressures encountered and accommodate movement or repositioning of equipment. A hose rated at 100 psig provides a safe, standard pressure limit that matches typical vapour transfer conditions and allows room for regulators and valves without risking overpressure or leaks. Other options rely on rigid threaded connections or fittings not designed for gas service or for liquids, which can compromise safety, compatibility, and sealing. Hence, using hoses rated at 100 psig ensures a reliable and appropriate connection for vapour withdrawal.

Flexible hoses rated for gas service are the connection method used in vapour withdrawal. When gas is drawn as a vapor, the system needs a flexible, leak-tight interface that can handle the pressures encountered and accommodate movement or repositioning of equipment. A hose rated at 100 psig provides a safe, standard pressure limit that matches typical vapour transfer conditions and allows room for regulators and valves without risking overpressure or leaks. Other options rely on rigid threaded connections or fittings not designed for gas service or for liquids, which can compromise safety, compatibility, and sealing. Hence, using hoses rated at 100 psig ensures a reliable and appropriate connection for vapour withdrawal.