Why Shell and Tube Heat Exchangers are popular?

Operating plants that need to heat and cool various chemicals in their process operations have many sorts of heat exchangers from which to choose. Familiar operating plants depend on their past experiences with various types of heat exchangers to confine which of those best fits their processing needs and gives them the performance to meet their objectives while offering the best maintenance alternatives. Niche FPP is the original Shell and tube heat exchanger manufacturers and still the only company that makes FEP and PFA tubing for shell and tube heat exchanger types.
Many of the advantages of one type of heat exchanger over another type are obvious to a knowledgeable operating plant, while many other advantages are much more subtle.
The prominent advantages of shell and tube heat exchangers over other types, such as plate and frame heat exchangers, whether gasketed or all welded, hairpin, spiral, or block heat exchangers, are as follows:
Many more shell and tube heat exchangers exist, which allows for the ease of securing competitive bids. The number of so-called specialty heat exchangers is relatively small, making competitive bidding more difficult.
The ease of performing maintenance at the plant on the shell and tube heat exchanger Specialty heat exchangers quite often require sending them back to the factory for repair, and many are located overseas.
The local shops in many areas specialize in the repair of shell and tube heat exchangers, which only repairs are numerous.
The advantages of shell and tube heat exchangers over the many other types are as follows:
The "specialty" heat exchangers are much more fragile than the beefy shell and tube heat exchangers and are subject to unintentional damage by overzealous, heavy-handed plant mechanics in their daily duties.
They have far fewer gaskets to utilize, leading to a less expensive maintenance cost when repairs are necessary.