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Post by stanmorek on Nov 30, 2005 7:48:13 GMT
A broken rail was found by patrolmen on the westbound Picc at Chiswick Park sub-gap last night. Emergency work was carried out at 3.30am and the trains were running as normal at the start of traffic in time for me to get home from my shift  . Judging by the sparks from a rail grinder from a distance the broken section would've been cut out and a thermic weld cast to rejoin. |
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Phil
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RIP 23-Oct-2018
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Post by Phil on Nov 30, 2005 10:29:53 GMT
Great to watch a thermic weld in process. I've been lucky enough to see a couple.
Smart work too getting it ready for traffic this morning.
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Post by rikio on Nov 30, 2005 20:44:22 GMT
Pendant:
I'm fairly sure its thermit, not thermic.
/pendant
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Phil
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Post by Phil on Nov 30, 2005 22:10:56 GMT
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Post by stanmorek on Dec 1, 2005 9:53:14 GMT
Yes Rikio I have heard it called thermit as well but on LU its often known as thermic. Even the LU track standards refer to it as site alumino-thermic weld but LU track do like to be awkard sods.  Ok Phil I admit it. I'm a civils man but Railwayman has a better ring to it! I even did my 6 months of "P-Way education" with an H&C track maintenance gang. Instead of the partying, you'd more likely find me digging out ballast on a saturday night! |
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Phil
In memoriam
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Post by Phil on Dec 1, 2005 10:22:11 GMT
Yes Rikio I have heard it called thermit as well but on LU its often known as thermic. Even the LU track standards refer to it as site alumino-thermic weld but LU track do like to be awkard sods. Ok Phil I admit it. I'm a civils man but Railwayman has a better ring to it! I even did my 6 months of "P-Way education" with an H&C track maintenance gang. Instead of the partying, you'd more likely find me digging out ballast on a saturday night! So, StanmoreK, which of us is going to offer Rikio a meal of pie ( the humble variety) to assist in the healing of that strange disease called Pedantry?  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D BTW nothing wrong with civils: arguably more important than the T/ops. If they get it wrong one train is in danger: if you get it wrong the whole operation is in danger. So stop apologising |
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Post by stanmorek on Dec 1, 2005 10:39:51 GMT
BTW nothing wrong with civils: arguably more important than the T/ops. If they get it wrong one train is in danger: if you get it wrong the whole operation is in danger. So stop apologising Nothing like a little bit of pressure eh? ;D ;D ;D Someone once likened civils to a goal keeper in a football match. Trains, signals and track were the sexy centre forwards that could improve performance and journey times. Civils is only noticed after something has gone wrong and a goal is let in. |
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Deleted
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Post by Deleted on Dec 14, 2005 15:52:09 GMT
the broken rail was not welded it was plated the A1 defect as its known would of been cut-out and then plated
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Post by cdr113 on Dec 14, 2005 22:34:17 GMT
just to be a complete pedant, the mixture of AL and iron oxide is called 'thermite' and the chemical process involved is "...variously called the Goldschmidt process, the thermite process, or the aluminothermic process". Thermit is a trade name...LUL term of thermic appears to be an abbreviation of 'aluminothermic process'....Everyone was right on this one, no pedants present apart from me quotes taken from : columbia.thefreedictionary.com/Thermite+process |
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Phil
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Post by Phil on Dec 14, 2005 23:11:51 GMT
OK - so to complete the pedantry, let me just state that the catalyst in the reaction is Barium Peroxide. Without this, none of the three (!!!!!!!!) processes would take place.
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Post by Deleted on Dec 14, 2005 23:27:12 GMT
OK - so to complete the pedantry, let me just state that the catalyst in the reaction is Barium Peroxide. Without this, none of the three (!!!!!!!!) processes would take place. Barium. Lovely stuff, I spend half my time at work putting the stuff into patients orifices. Not for track welding purposes though! |
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Post by stanmorek on Dec 15, 2005 9:33:29 GMT
the broken rail was not welded it was plated the A1 defect as its known would of been cut-out and then plated Emergency plating is advised in the good old P-Way standard P8401 and the 1a minimum action code. Plate the rail and slap on a 20mph ESR. As I said it looked like welding from a distance. More sparks than cutting. I'll nab the patrolman and ask when I see him next.  |
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Post by q8 on Dec 15, 2005 10:11:31 GMT
Re broken Rails. I once saw a gang in the sixties repair a broken rail in Barking sidings with what seemed to be fishplates. With a gas torch they were WELDING the things to the rail across the break [Which seemed to be more of a crack than a break] IIRC it remained in situ like that for a good while.
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Post by stanmorek on Dec 15, 2005 10:27:19 GMT
Re broken Rails. I once saw a gang in the sixties repair a broken rail in Barking sidings with what seemed to be fishplates. With a gas torch they were WELDING the things to the rail across the break [Which seemed to be more of a crack than a break] IIRC it remained in situ like that for a good while. I think welding of that type would be frowned upon these days... ;D The welds couldn't have been very large and there would be fatigue issues though trains would be travelling at low speed. Having said that track maintenance in sidings and depots is a bit more relaxed. BTW Was there such a thing as a hot works permit back then? |
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Post by q8 on Dec 15, 2005 11:40:46 GMT
BTW Was there such a thing as a hot works permit back then? Not to my knowledge SK |
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