How to design Expansion Joint??

[mechmania]

Hi,

How do I determine if I required the Expansion Joint for shell and Tube heat exchanger(fixed Tubesheet type)?


Following are the max temperature for each condition listed below.

Design Conditions

Shell side P(psig)=150 Temp(min/Max)=32/250 deg F
Tube side: P(psig)=150/FV Temp9min/Max)=32/250 deg F

Shell Shell Tube Tube
sideT side P sideT side P
(F) (psig) (F) (psig)



Normal Operation 43 50 57 -15

"Shell side fluid on
-Tube side fluid off" 32 57 32 0

"Tube side fluid on
-Shell side fluid off" 70 0 142 -15

Steam Out condition 70 0 278 25


MOC is:

Shell= carbon steel(SA106B)
Tube= Hastelloy B3(SB626 UNS N10676)

Thanks for your response!!

Mechmania

 

[srfish]

A calculation procedure is found in TEMA (Tubular Exchanger Manufacturers Association). It is not a simple calculation if you do it by hand.

You will need the metal temperatures of both sides as determined by a rating program. Unless the tubesheet is welded in, you will need the operating and gasket seating moments of the attached flange.

The worst expansion case is when the hottest temperature is in the tube side.