What does FPT mean in UNCLASSIFIED

Female Pipe Taper (FPT) is a kind of pipe thread with a conical shape that is used to create a seal when two pipes are connected. It is commonly used in plumbing and other industrial applications to join pipes and fittings with a tight, leak-proof seal.

The taper in FPT threads provides a self-tightening effect as the pipes are screwed together. As the male and female threads engage, the tapered surfaces force the threads to tighten against each other, creating a seal. This self-tightening feature ensures a secure connection even under pressure or vibration.

To make an FPT connection, you will need two pipes or fittings with FPT threads. Apply a thin layer of sealant, such as Teflon tape or pipe dope, to the male threads to enhance the seal. Then, screw the male and female threads together by hand until they are snug. Finally, use a wrench or pliers to tighten the connection further, but be careful not to overtighten and damage the threads.

FPT and NPT (National Pipe Taper) threads are both tapered pipe threads, but they have different applications and sealing methods. FPT threads are primarily used for low-pressure applications, such as plumbing and water lines, while NPT threads are used for higher-pressure applications, such as gas lines and hydraulic systems. Additionally, FPT threads are designed to create a seal using a combination of the taper and a sealant, while NPT threads rely solely on the taper to form the seal.

FPT threads offer several advantages, including:

• Self-tightening design for a secure connection
• Leak-proof seal even under pressure or vibration
• Easy to install and disassemble
• Cost-effective compared to other sealing methods