[modeleng] Re: FW: Rail Accident Investigation alert: RAIB investigation - Kirklees
- From: The Sheppard Residence <psbr20252@xxxxxxxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Fri, 29 Jul 2011 20:12:41 +0100
I have a space for one in the boilers of both my Hunslet and my Garratt.
Cheers
Peter
On 29/07/2011 19:37, Jesse Livingston wrote:
> While on the subject of fusible plugs, does anyone use them in our minature
> locomotive boilers?? I know I don't use them myself nor do I know of any of
> our club members who do. Phill, is TEL ailing? I haven't heard any words
> of wisdom from him the last few days.
>
> Jesse in Troy, TN where it is raining right now.
>
>
>
> ----- Original Message -----
> From: "Phill Smith"<steam@xxxxxxxxxxxxxxxxxxxxxx>
> To:<modeleng@xxxxxxxxxxxxx>
> Sent: Friday, July 29, 2011 9:24 AM
> Subject: [modeleng] Re: FW: Rail Accident Investigation alert: RAIB
> investigation - Kirklees
>
>
>> G'Day Peter,
>>
>> I was not knocking the fusible plug, but the report itself. I found it to
>> be
>> typical of a gov't report that has been written by someone who doesn't
>> actually know much (if any thing) about the topic that they are writing
>> about..... I saw it as Rich did. My comments were purely a facetious view
>> of
>> the report, and it's lack of saying anything worthwhile, while seeming to
>> blame everybody..... Especially the driver who desperately needs his arse
>> kicking for, not dropping the fire until the fusible plug had started
>> melting, which he also failed to notice....... How bloody slack is
>> that!!!!!
>>
>> I feel I must also apologise for my dry sense of humour...... As this
>> could
>> be taken the wrong way.
>>
>>
>> On another serious note.
>>
>> Fusible plugs have the same chances of failing as RCD's and all other
>> safety
>> devices. Right now, I am trying to think of one that is completely
>> failsafe,
>> and can't. ( If anyone can think of one, then please tell me what it
>> is!! )
>> What can make it hard for fusible plugs to work, is if they get a thick
>> enough scale build up over the top of them...... This, while under test,
>> has
>> been found to hold back the steam in some circumstances. There is a very
>> simple cure for this, and that is to replace the plug at every testing of
>> the boiler as the minimum frequency. That seems to nail it for the hobby
>> boiler very nicely. For the commercial boiler, they have to be replaced
>> according to the relevant standard. Over here (West Aust.) it is annually
>> at
>> a minimum frequency. In the marine world, I believe it's at every
>> inspection, which is (I believe) every 2 years.......? I can't remember
>> now.....
>> Regardless, they are the best safety device known to man so far...... I
>> suppose we could invent a infer-red temp scanner that will read the temp's
>> of all the firebox plates and set of an alarm if the plates get too
>> hot.....
>> And the best bit is that you need to measure the fire side of the sheets
>> as
>> they are much hotter than the water side...... So now it must withstand
>> 1500°C, and would need to be calibrated annually to ensure that it is
>> actually working... at the time of calibration......
>> Nothing is perfect, so we just have to do the best we can.
>>
>>
>> Have a great weekend.
>>
>>
>> Cheers,
>>
>> Phill.
>>
>> --------------------------------------------------
>> From: "The Sheppard Residence"<psbr20252@xxxxxxxxxxxxxxxx>
>> Sent: Friday, July 29, 2011 6:30 PM
>> To:<modeleng@xxxxxxxxxxxxx>
>> Subject: [modeleng] Re: FW: Rail Accident Investigation alert: RAIB
>> investigation - Kirklees
>>
>>> On 29/07/2011 10:59, Peter Sheppard wrote:
>>>> MODEL ENGINEERING DISCUSSION LIST.
>>>>
>>>> To UNSUBSCRIBE from this list, send a blank email to,
>>>> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the
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>>>> line.
>>>
>>> Always blank from web-mail?
>>>
>>> This is what I writ!
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Phil,
>>>
>>> I'd rather they investigate a "near miss" before we have to investigate
>>> why a boiler exploded!
>>>
>>> There are many examples in the safety world (in all industries) where if
>>> people had noted the warning signs, the accident may not have occurred.
>>>
>>> I always feel that fusible plugs are a potential "weak point" (pardon
>>> the pun) in the safety of a boiler. You have to hope that they work
>>> when required, but then, you only know if they don't work when they
>>> don't (if you see what I mean). You can't test them! You can test one
>>> similar, but not the one in situ! (A bit like wire fuses).
>>>
>>> It may have only partly worked, the report will be interesting.
>>>
>>> Cheers
>>>
>>> Peter
>>>
>>> MODEL ENGINEERING DISCUSSION LIST.
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>>
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>
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