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South Pacific Tyres; John Thompson boiler demolition 7; fire tube
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PhotographerBill Prebble
DescriptionThis boiler was made by a John Thompson subsidiary in Hamilton; it was rated at 35 000 pounds/16 000 kg per hour from and at 100 degrees C; noticeably less at its working pressure of 250 pounds per square inch (17 bars).
The near wall of the boiler and the multiple circular flue-gas tubes on that side have gone. Behind Paul Archibald is the fire tube which contained the flame produced by the gas-or-oil burner. Most of the near side has been cut away.
This tube has the greatest variations in temperature; the corrugations reduce the forces caused by expansion and contraction. They will also make it more difficult for the tube to collapse out-of-round under external pressure.
These eight images have been selected from 23 taken as the boiler was carved up; they show the main details, and how the boiler worked.Date TakenNovember 2007
DescriptionThis boiler was made by a John Thompson subsidiary in Hamilton; it was rated at 35 000 pounds/16 000 kg per hour from and at 100 degrees C; noticeably less at its working pressure of 250 pounds per square inch (17 bars). The near wall of the boiler and the multiple circular flue-gas tubes on that side have gone. Behind Paul Archibald is the fire tube which contained the flame produced by the gas-or-oil burner. Most of the near side has been cut away.
This tube has the greatest variations in temperature; the corrugations reduce the forces caused by expansion and contraction. They will also make it more difficult for the tube to collapse out-of-round under external pressure.
These eight images have been selected from 23 taken as the boiler was carved up; they show the main details, and how the boiler worked.
Date TakenNovember 2007 Depicts or relates to
Part of
CollectionDunlop Prebble
About the original
ReferencePrebble 19FormatColour printSize150 x 100 mm
FormatColour printSize150 x 100 mmScanned byDon McLeod
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South Pacific Tyres; John Thompson boiler demolition 7; fire tube. Upper Hutt City Library, accessed 19/03/2026, https://uhcl.recollect.co.nz/nodes/view/30440