When assembling a flexible hose, how should the nipple be fastened?

• A. By screwing it into the socket with hands
• B. Using a wrench on the hex of the nipple
• C. By pressing it into place
• D. By hammering it on

Answer: (B)

The best practice for fastening a nipple when assembling a flexible hose is to use a wrench on the hex of the nipple. This method ensures that the nipple is securely fastened to the hose without risking damage to the thread or the materials involved. Using a wrench allows for the application of the appropriate torque, which is crucial for creating a tight seal that prevents leaks.

This is important in fluid line systems where integrity and reliability are paramount, as improper fastening can lead to failure of the system, resulting in costly downtime and repairs. Moreover, using a wrench helps in achieving a uniform and consistent tightening, which is essential for maintaining the proper function of the assembly under varying pressure and temperature conditions.

Screwing the nipple in by hand, pressing it into place, or hammering it could compromise the integrity of the assembly, as these methods do not provide the precision and torque control that a wrench does.