Question 97

Flange cannot be used in gas piping.

Flanges are not suitable for gas piping applications due to the potential for leaks at the joint connections. Unlike other fittings that can provide a more secure and leak-proof connection, flanges are generally used in systems where disconnection is necessary, which increases the risk of gas leakage.

A) Couplings

Couplings are designed to connect two sections of pipe together and are commonly used in gas piping systems. They offer a secure connection that minimizes the risk of leaks, making them suitable for this application.

B) Unions

Unions are another type of fitting that allows for easy disconnection of piping sections without compromising the integrity of the connection. They are typically used in gas piping and are considered safe and effective for this purpose.

C) Bushings

Bushings are fittings that allow for the connection of different pipe sizes and can be effectively used in gas piping. They provide a reliable method for transitioning between various diameters of gas pipes, ensuring a secure fit.

D) Flange

Flanges are not recommended for gas piping applications because they can create points of vulnerability where leaks may occur. Their use is more common in water or industrial piping systems where frequent disconnections are necessary, which is not ideal for gas lines.

Conclusion

The use of flanges in gas piping systems poses a higher risk of leakage compared to the other fittings listed. Couplings, unions, and bushings all serve to create secure connections that are necessary for the safe transport of gas. Thus, flanges are definitively the incorrect choice for gas piping applications.