Safety valve!! Hey!! I'm glad you mentioned that! I'll take it apart and install a new ball just as soon as the hydro is over! Al Messer --- The Sheppard Residence <peter@xxxxxxxxxxxxxxxxxxx> wrote: > I assume that they are looking for "worst case", > i.e. the most steam > being raised (by whatever means) that is normal for > that boiler. > > So if no blower and butane fired, I assume the > largest fire that you > could expect. > > As a corollary to the above (based on personal > experience in my early > days as a locomotive engineer!) after a winter > lay-down, don't assume > that the safety valves will work! Sometimes they > need "encouraging" > (sometimes even after a short a laydown as a couple > of months!) > > What happened was that I made the mistake of > steaming up, pressure > rising nicely, out of the steaming bays onto the > main line, pressure > continuing to rise, past the 10% and rising! Drop > the fire (on the main > line) back to the steaming bays and remove the > safety valves. (the > stainless steel balls had corroded!) > > I now make sure that both safety valves have blown > off in the steaming > bays before I go anywhere. > > (I know it seems common sense, but there are times > when you have to > learn these lessons!) > > Cheers > > Peter > > Allen Messer wrote: > > > Peter, what if the boiler is a Water Tube Marine > > design, that is Propane fired, and has no blower? > > Would a "Full Blast Fire" situation on the burner > > suffice? > > > > Al Messer > > --- Peter Sheppard <peter.sheppard@xxxxxxxxxx> > wrote: > > > > > >>As far as I am aware in the UK, the following is > >>required on copper boilers > >>every two years (it may apply to steel boilers as > >>well). > >> > >>1.5x hydraulic test; plus > >>steam test to demonstrate that with a full blower > >>the safety valves will > >>maintain pressure at no greater than 10% above > >>working pressure and at the > >>same time look for significant steam leaks > >> > >>Cheers > >> > >>Peter > >> > >> > > > > > ------------------------------------------------------------------------ > > > >> > >> > > > > > ----------------------------------------------------------- > > > >>Hi there Al, > >> > >>One slight thing which you mentioned, which no-one > >>seems to have commented > >>on. > >> > >>Over here in the UK, we normally give steel > boilers > >>an annual test > >>(correct me if I'm out of touch anyone), but > copper > >>boilers are only > >>tested every two years, and I had been lead to > >>believe that this was just > >>the hydraulic test. > >> > >>I know that the initial hydraulic test is to twice > >>working pressure - > >>has someone mentioned before that some retests > need > >>only be to 1.5 times > >>working pressure? > >> > >>Yours, > >> > >> > >>Rich. > >> > >> > >>On Wed, 1 Dec 2004, Allen Messer wrote: > >> > >> > >>>Thanks for the input, Gents! I'll just have to > >> > >>whip > >> > >>>out a pump and give 'er a good test. > >>> > >>>Al Messer > >>>--- alanjstepney > >> > >><alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> > >> > >>>wrote: > >>> > >>> > >>>>Yes. > >>>>Over here it is a requirement of all the Model > >>>>Engineering Societies and > >>>>their insurers. > >>>>Apart from that, they can deteriorate over time, > >> > >>and > >> > >>>>as a test is so quick > >>>>and simple, it is better to test than not. > >>>> > >>>>alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx > >>>> > >>>>www.alanstepney.info > >>>>Model Engineering, Steam Engine, and Railway > >>>>technical pages. > >>>> > >>>>----- Original Message ----- > >>>>From: "Allen Messer" <al_messer@xxxxxxxxx> > >>>>To: "modeleng" <modeleng@xxxxxxxxxxxxx> > >>>>Sent: Wednesday, December 01, 2004 1:44 AM > >>>>Subject: [modeleng] Copper boilers > >>>> > >>>> > >>>>Since it is assumed that model boilers made from > >>>>Copper are not affected by corrosion as are > >> > >>those > >> > >>>>made > >>>>of Steel, is it necessary to give them an annual > >>>>hydro > >>>>and steam test? > >>>> > >>>>Al Messer > >>>> > >>>> > >>>> > >>>> > >>>>__________________________________ > >>>>Do you Yahoo!? > >>>>Yahoo! Mail - You care about security. So do we. > >>>>http://promotions.yahoo.com/new_mail > >>>>MODEL ENGINEERING DISCUSSION LIST. > >>>> > >>>>To UNSUBSCRIBE from this list, send a blank > >> > >>email > >> > >>>>to, > >>>>modeleng-request@xxxxxxxxxxxxx with the word > >>>>"unsubscribe" in the subject > >>>>line. > >>>> > >>>>MODEL ENGINEERING DISCUSSION LIST. > >>>> > >>>>To UNSUBSCRIBE from this list, send a blank > >> > >>email > >> > >>>>to, > >>>>modeleng-request@xxxxxxxxxxxxx with the word > >>>>"unsubscribe" in the subject line. > >>>> > >>> > >>> > >>> > >>> > >>>__________________________________ > >>>Do you Yahoo!? > >>>All your favorites on one personal page =96 Try > My > >> > >>Yahoo! > >> > >>>http://my.yahoo.com > === message truncated === __________________________________ Do you Yahoo!? The all-new My Yahoo! - What will yours do? http://my.yahoo.com MODEL ENGINEERING DISCUSSION LIST. 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