n Aromatics Plants, various types of heat exchangers are commonly used depending on the specific process requirements and design considerations. Here are some types that are often encountered:

1. Shell and Tube Heat Exchangers: These are widely used in Aromatics Plants due to their versatility and ability to handle high pressures and temperatures. They consist of a series of tubes (often made of stainless steel) through which one fluid flows, while another fluid flows around the tubes within a larger shell.

2. Air Cooled Heat Exchangers (ACHE): ACHEs are used when water availability is limited or when the process fluid needs to be cooled to ambient temperatures. They consist of finned tubes through which ambient air flows to cool the process fluid circulating inside the tubes.

3. Plate Heat Exchangers: These exchangers are compact and efficient, using a series of corrugated metal plates to transfer heat between fluids. They are suitable for applications where space is limited or when there is a need for high thermal efficiency.

4. Finned Tube Heat Exchangers: Similar to shell and tube exchangers, finned tube exchangers have fins attached to the outside of the tubes to increase the heat transfer surface area. They are used when enhanced heat transfer is required.

5. Compact Heat Exchangers: These include various designs like brazed plate heat exchangers or welded plate heat exchangers, which offer high heat transfer rates and compact size. They are suitable for applications where space and weight are critical factors.

Regarding the standards and codes you mentioned:

• ASME Section VIII Div 1 & Div 2: These are codes for pressure vessel design, which are relevant for the design and fabrication of shell and tube heat exchangers.

• TEMA (Tubular Exchanger Manufacturers Association): TEMA standards provide guidelines for the design, construction, and testing of shell and tube heat exchangers, which are widely used in Aromatics Plants.

• API 660: This standard specifies requirements for shell-and-tube heat exchangers used in the petroleum and petrochemical industries, including Aromatics Plants.

• HTRI (Heat Transfer Research, Inc.): HTRI provides software, research, and engineering consulting services related to heat exchanger design and performance evaluation.

• PV Elite: PV Elite is software used for the design and analysis of pressure vessels and heat exchangers according to ASME codes.

These heat exchangers and standards are crucial for ensuring efficient operation and compliance with safety and regulatory requirements in Aromatics Plants and similar industrial facilities.