Question

Why must the ends of the fire tubes be flared and beaded?

a) aid in removal in the future
b) aid in the flow of flue gases
c) for expansion and contraction
d)

Answer 1

The ends of fire tubes are flared and beaded to aid in the flow of flue gases and accommodate expansion and contraction.

Step-by-step explanation:

The ends of fire tubes in boilers are often flared and beaded for two main reasons:

1. To aid in the flow of flue gases: The flared and beaded ends create a smoother transition for the gases, reducing turbulence and improving the efficiency of heat transfer.
2. For expansion and contraction: Flaring and beading the ends allows the tubes to expand and contract without causing damage or leaks. It provides a mechanical lock between the tubes and the tube sheets, ensuring a secure connection.