TEMA A.23 TUBE LONGITUDINAL STRESS - PERIPHERY OF BUNDLE
TEMA A.23 TUBE LONGITUDINAL STRESS - PERIPHERY OF BUNDLE
(OP)
Dear All
I am designing an S&T heat Exchanger of type BEM and i am having the Following Error on compress "TEMA A.23: Tube longitudinal compressive stress is excessive (Operating)."
what are the possible ways to eradicate this error
My Design conditions are
Shell side:
Design Pressure : 77 bar(g)
design Temp: 85 degree C
MDMT: -29 Degree C
MMT: -3.55 Degree C
material: carbon steel (SA 516-70)
Tube Side:
Design Pressure : 77 bar(g)
design Temp: 85 degree C
MDMT: -29 Degree C
MMT: 35.01 Degree C
material: carbon steel (SA 179 Seamless tubes, SA-266 grade 2).
See this thread as well for design calculations
I shall be very thankful to you all
http://www.eng-tips.com/viewthread.cfm?qid=374174
I am designing an S&T heat Exchanger of type BEM and i am having the Following Error on compress "TEMA A.23: Tube longitudinal compressive stress is excessive (Operating)."
what are the possible ways to eradicate this error
My Design conditions are
Shell side:
Design Pressure : 77 bar(g)
design Temp: 85 degree C
MDMT: -29 Degree C
MMT: -3.55 Degree C
material: carbon steel (SA 516-70)
Tube Side:
Design Pressure : 77 bar(g)
design Temp: 85 degree C
MDMT: -29 Degree C
MMT: 35.01 Degree C
material: carbon steel (SA 179 Seamless tubes, SA-266 grade 2).
See this thread as well for design calculations
I shall be very thankful to you all
http://www.eng-tips.com/viewthread.cfm?qid=374174





RE: TEMA A.23 TUBE LONGITUDINAL STRESS - PERIPHERY OF BUNDLE
1) Heavier tube wall thickness. This affects performance and cost.
2) Decreased unsupported tube span. Ditto above.
3) Different shell and / or tube material. Rarely feasible.
4) Reduced differential MMT's. Ditto above.
5) Add expansion joint. This nearly always works, but at added cost and complexity.
Regards,
Mike