Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. KeItSiSt

    PITTING OF CS

    So this brings up another issue I have struggled with. Which material is better in a condensing type natural gas fired boiler where the water is condensed using the flue gas like a heat exchanger application inside the boiler for better efficiency? The exhaust contains chlorides (bad for...
  2. KeItSiSt

    Selection of Boiler Feed Water Pump

    condensate return pump should be twice the load as a minimum making sure it has enough head to pump back to wherever its going. You would only need a bypass line in your boiler feed pump if the pump is vastly oversized or running continuous with a modulating feedwater valve on your boiler.
  3. KeItSiSt

    Source for pressure vessels

    i am assuming you are needing to ASME. If designed to another standard your best bet is to stay within that country.
  4. KeItSiSt

    Source for pressure vessels

    Not sure where you are wanting this vessel shipped but it is small enough that you should get someone local. This is something fairly easy for someone with an ASME section VIII stamp. This can be found by doing a internet search for your local area or in the U.S. a book is published for each...
  5. KeItSiSt

    Condensate Receiver - mixing of makeup water

    There are other issues of adding make-up water to the deaerator instead of to the condensate tank. ONe is the retention time and how you are going to control putting condensate into the deaerator and how you are going to control putting make-up water into the deaerator? Typically, if water is...
  6. KeItSiSt

    500# steam vs 15 #

    It sounds as though these are a couple of 500HP low pressure steam boilers. 15# means 15 psig which is the design of the boiler and would be an ASME Section IV unit. This should be found on the ASME data plate with a little "H" in the clover leaf that is on the ASME nameplate. Quick...
  7. KeItSiSt

    Heat transfer to water storage tank

    You asked alot of questions. Wind does have an effect. According to my map from the US weather bureau the lowest one-day mean temperature for that area is around 25F below zero. Not sure if you have a elevated steel tank or a steel suction tank but I will assume a steel suction tank. Based...
  8. KeItSiSt

    Dissolved O2 removal from boiler feed water

    b8checker: No, on both accounts. The surge tank needs protection because of the temperature changes that are occuring with the incoming water and the fact that the water in the surge tank is exposed to atmospheric conditions. As water temperature changes occur more or less gasses become...
  9. KeItSiSt

    Superheated steam at low pressures

    Did I say 370F? Sorry, meant to say 370C...about 700F has been my limit.
  10. KeItSiSt

    Superheated steam at low pressures

    How are you going to get water into your boiler if the water inlet pressure is less than the boiler operating pressure? There are two types of electric boilers; electrode and resistance heating. Both are basically a tank with elements immersed in the water. ON a steam boiler the top portion...
  11. KeItSiSt

    Firetube Vs. Watertube

    Burnham has firetube boilers up to 1500HP as standard which is 51750 #/hr.
  12. KeItSiSt

    Dissolved O2 removal from boiler feed water

    I know of carbon steel deaerators that have been in service for 50 years. My experience is that any steel containing carbon is susceptible to oxygen attack. However, at 7 ppb makes the "attackers" very minimal and basically has no effect on the life span of a deaerator if the...
  13. KeItSiSt

    Dissolved O2 removal from boiler feed water

    I agree with you on the relief valve and PRV comments. Anytime a PRV is supplied the RV HAS to be able to relieve the full capacity of the PRV if stuck wide open (per ASME and common sense!) THe PRV and relief valve should be supplied by the same company. THere is no way to supply a RV...
  14. KeItSiSt

    Dissolved O2 removal from boiler feed water

    TBP - I agree on operating the DA giving a cushion. I was referencing before the water reached the storage area. If I have a DA designed for 20,000 #/hr (for example) but my condensate is collected at different stations and all comes back at once my DA connections and internals are not sized...
  15. KeItSiSt

    Dissolved O2 removal from boiler feed water

    A condensate tank before a deaerator is commonly called a surge tank. There are only two reasons that I can think of to need one: 1) If you have gravity returns coming back that cannot overcome the deaerator pressure then it would need collected and 2) If you have several condensate stations...
  16. KeItSiSt

    Parallel Downflow Deaerator

    Ive always wondered how the steam is supposed to flow down to heat the water? Counter-flow makes much more sense and does have alot more contact area. This is why 99% of tray deaerator manufactures make the counter-flow design and have abandoned the parallel-flow. Spray/Tray deaerators are...
  17. KeItSiSt

    Kewanee Boiler Manual Search

    As you have probaby found out Kewanee is no longer in business and the guy who used to represent them in your local area may not want to help you. You can call the factory direct. They have a skeleton crew that will be leaving shortly (309-853-3541). THey have also started a new company to...

Part and Inventory Search

Back
Top