Flash Tank Sizing Standard 2

[hadams417]

Does anyone know any information pertaining to sizing Flash Tanks for steam systems. I am wondering if there is a standard that I must adhear to or if sizing a Flash Tank is simply left up to what the distributer's specs call for.

Thanks for any help.

 

[samuelliu]

I believe that there are, at least, two resources. One is ASHRAE HANDBOOK, and other is one North Amercia Valve Vendor's handbook. As I am out of home country for the business, sorry for no further detailed information available.

 

[samuelliu]

Just checked with some files in my laptop, it is recommended that you refer to S10.14 of ASHRAE HANDBOOK.

 

[athomas236]

You could try the Canadian Boiler, Pressure Vessel and Pressure Piping Code B51-97, Part 1

 

[MJCronin]

hadams...

The people at Penn separator have always been helpful to me

http://www.pennseparator.com/

They offer sized systems based on the boiler capacity, pressure and expected blowdown rate.

I had some ancient ASME papers, from the 1940's on this topic.....developed by a former Stone & Webster Vice president.....I had 'em......but I lost them

I am aware of no recent engineering textor article on this subject.

MJC

 

[rmw]

An internet source for flash tank sizing is:

http://www.sugartech.co.za/rapiddesign/flashvessel/index.php

One of the more important governing factors is the limiting of the upflow velocity of the steam vapor to prevent entrainment of moisture droplets.

There is a good discussion of this issue in another forum in this site, so you might try a search in Eng-tips.

rmw

 

[hadams417]

rmw -

Your internet link was quite helpful. The National Board of Boiler and Pressure Vessel inspectors provides a document called "A Guide for Blowoff Vessels" where they identify a good target velocity for the steam vapor of 11 ft/sec to allow for proper seperation.

https://www.nationalboard.org/NationalBoard/Publications/Pdf/nb27.pdf

Im not having any luck locating the discussion you made reference to (I'm rather new on this website) and I was hoping you could point me more in the right direction. Thank again for your help.


_________________________________
Henry B. Adams, III
Clemson University, ME Undergrad
Spirax Sarco Inc.

http://www.spriaxsarco.com

 

[rmw]

Try thread124-125547

rmw