Boiler Blows Up

Re: Boiler Blows Up

PostBy: hophead On: Fri Jul 04, 2008 1:13 pm

Thanks so much for the info. I really didn't want to root through all my paperwork to prove this point. I guess I'm getting a little lazy.
hophead
 
Stove/Furnace Make: efm520

Re: Boiler Blows Up

PostBy: gaw On: Fri Jul 04, 2008 2:59 pm

Freddy wrote:
gaw wrote:I know of a boiler with NO pressure safety device whatsoever. !


How can that be? All boilers (and hot water heaters) come with them pre-installed. Someone removed it to make room for a whiskey bottle cleaner??

This is a used EFM 520 coal stoker. He probably acquired it without the relief valve and did not know about needing it. I keep telling my wife that I hope nothing ever goes wrong for him or we will be reading about it in the paper.

I saw the story in the paper from Orwigsburg and the one photo shows the grade level basement opening just blown away along with major first floor damage. It did kill two cats and a dog. Thankfully the lady was upstairs when it went.
gaw
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice from Schuylkill County

Re: Boiler Blows Up

PostBy: Yanche On: Fri Jul 04, 2008 8:44 pm

Thanks for the reference. I've verified that exactly the same text appears in the 2006 edition of the International Mechanical Code, ISBN 1-58001-257-4. Aways learning.

I guess I'll have to change my boiler if I think it will ever be inspected. I wonder if two safety valves would pass muster. One installed to code that you never test and a second installed with a service valve that you do test. Any opinions?
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Visit Lehigh Anthracite

Re: Boiler Blows Up

PostBy: hophead On: Fri Jul 04, 2008 9:36 pm

It's your house, do whatever you like. If you have taps for two go ahead but one must to code. They must also be on the boiler not down the system somewhere. Whatever you do don't take your insurance man on a tour. Well go ahead because they have no idea what to look for any way. It,s the investigators you have to be careful of!
hophead
 
Stove/Furnace Make: efm520

Re: Boiler Blows Up

PostBy: Richard S. On: Fri Jul 04, 2008 9:42 pm

Yanche wrote: I wonder if two safety valves would pass muster. One installed to code that you never test and a second installed with a service valve that you do test. Any opinions?


Always a simple solution for everything that will most likely get overlooked. Then again since that first valve is not being tested it could possibly fail.
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: Boiler Blows Up

PostBy: Freddy On: Fri Jul 04, 2008 10:10 pm

Now you're on to a good idea Greg! As long as one is to code a second one would be fine. If the code one fails, the non code one should be fine as it's been tested. If the non code one get's shut somehow, the code one will work as designed. Perfect solution!
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: Boiler Blows Up

PostBy: jaysonref On: Sun Jul 06, 2008 10:51 am

i am also a hvac tech and would bet the relief valve was leaking and someone plugged it up. several bad things had to happrn for a boiler to blow up like that.
jaysonref
 
Stove/Furnace Make: alaska stove #140

Re: Boiler Blows Up

PostBy: Steve.N On: Sun Jul 06, 2008 12:32 pm

When I bought the store the water heater had a 3/4 inch plug in it instead of the proper T/P valve. After I replaced the water heater I had trouble with the valve on the new tank leaking until I discovered that the pressure reducing valve on the incoming cold water was bad and there was 150 psi of water pressure in the store. The previous owner solved the leak by plugging the safety valve instead of fixing the problem. At home I run two safety relief valves one on the wood boiler and one on the oil boiler and check them monthly due to our hard water. I had to replace one last year and did it without draining the system. I just reduced the pressure to zero then made a quick swap, I only lost about a pint of water.
Steve.N
 
Stove/Furnace Make: Harman mkII
Stove/Furnace Model: Axeman Anderson 260 at store

Re: Boiler Blows Up

PostBy: Freddy On: Sun Jul 06, 2008 1:56 pm

I've swapped parts on boilers with little pressue and them cold. You'd be surprised at how much of a shower you take with only 3 pounds pressure. There was one I was sure was glad that I didn't do it with 180 degree water!
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: Boiler Blows Up

PostBy: Steve.N On: Sun Jul 06, 2008 2:13 pm

I did forget to note that I did it with the boiler cold. I know what you mean about a couple of pounds of pressure, makes you wonder where all the water is comming from aspecially if the port is bigger than 1/2"
Steve.N
 
Stove/Furnace Make: Harman mkII
Stove/Furnace Model: Axeman Anderson 260 at store

Re: Boiler Blows Up

PostBy: Matthaus On: Mon Jul 07, 2008 9:59 am

All this talk about plugged PRVs reminded me of when I stripped the inside of the single wide trailer next door. I purchased it for storage and removed the interior. When I got to the HW heater I cut the pipes and pulled the heater away from the wall, to my surprise the jacket on the back was split open and pushed out from the heater by a good 8" in the middle, as I puzzled on that I saw that the PRV had a nice plug in it! WOW I might have lost the front of my house in that little incident. :P
Matthaus
 
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel, natural gas
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite

Re: Boiler Blows Up

PostBy: e.alleg On: Tue Jul 08, 2008 10:26 am

It's not fair to say that novices can't learn and plumb their own system. It's the same as a mechanic saying that a regular person can't fix their own car or a small business owner can't do his own taxes. Sure, if a person does his own brake job with zero knowledge and understanding of how everything works then he can easily kill his family and endanger everyone else on the road, but if he takes the time to read a manual and follow the instructions then it will probably be done better than the mechanic who is paid by the job and encouraged to rush. A person who prepares his own tax return cares more it being done right than anyone else on the planet, I can guarantee that. A homeowner who decides to install their own plumbing isn't rushed by the next job so he can take his time and do it right, and with the money saved by doing it himself he can buy better quality hardware. I am an ASE certified automotive master tech, I know first hand how non skilled workers can really screw up something by tinkering with things they don't understand, but on the other hand I have customers who know more about their British cars than I could ever hope to understand.
e.alleg
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: Boiler Blows Up

PostBy: Yanche On: Tue Jul 08, 2008 1:02 pm

Amen to your experience. When I was first installing my coal boiler I was taken out of action by an auto accident for a few weeks. I called a local heating contractor for an estimate. I had to explain to him how primary secondary piping systems work. It took him so long to get his estimate to me that I recovered from my injury and had finished the job. He was surprised when he didn't get the job. I'll put my self learned hydronic heating design skills up against any residential heating contractor. Any motivated person can learn, the opportunity is there and the Internet makes finding the right source so much easier.
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea

Re: Boiler Blows Up

PostBy: Matthaus On: Tue Jul 08, 2008 7:43 pm

I also agree with Ed's statements. I don't ever have anyone do anything I have the time to tackle. I have noticed as the various trades diminish the amount of apprenticeship hours required (or eliminate them altogether) for journeyman status the skill level of the folks doing the work is less and less to be trusted. While certifications such as ASE provide a measure of general knowledge, they don't give any measure of journeyman status. That used to be earned, now it is handed out like candy, sometimes merely by knowing the right person.
I think the bottom line ingredient that a homeowner has in his or her favor is not only the caring and first hand knowledge of their particular situation, but the willingness to learn and the open mind required to produce true excellence.

Let's hear it for good old fashioned Yankee ingenuity after all that is what made this country great and what I believe is going to help us regain some of what we have lost in recent years! toothy :clap: :flex:
Matthaus
 
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel, natural gas
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite

Visit Lehigh Anthracite

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