The thermal design of a heat exchanger to recover heat from a kerosene stream by transfer to a crude oil stream was carried in Chapter 12, Examples 12.3 and 12.4. Make a preliminary mechanical design for this exchanger. Base your design on the specification obtained from the CAD design given in Example 12.4. All material of construction to be carbon steel (semi-killed or silicon killed). Your design should cover:
(a) choice of design pressure and temperature,
(b) choice of the required corrosion allowances,
(c) choice of the type of end covers,
(d) determination of the minimum wall thickness for the shell, headers and ends,
(e) a check on the pressure rating of the tubes.

Data from example 12.3 

Design a shell-and-tube exchanger for the following duty. 20,000kg/h of kerosene (42° API) leaves the base of a kerosene side-stripping column at 200°C and is to be cooled to 90°C by exchange with 70,000 kg/h light crude oil (34° API) coming from storage at 40°C. The kerosene enters the exchanger at a pressure of 5 bar and the crude oil at 6.5 bar. A pressure drop of 0.8 bar is permissible on both streams. Allowance should be made for fouling by including a fouling factor of 0.0003 (W/m2 °C) ^–1 on the crude stream and 0.0002 (W/m2°C) ^–1 on the kerosene stream.

Data from example 12.4

Optimize the design of Example 12.3 using commercial heat exchanger design software.