This section is from the book "Principles And Practice Of Plumbing", by John Joseph Cosgrove. Also available from Amazon: Principles and Practice of Plumbing.
Temperature tests of a fire by observation can be told in a fairly exact manner by Table XLVII.
Appearance of Fire | Approximate Temperature, Fahr. |
Red, just visible................ | About 977 degrees |
Red, dull....................... | About 1290 degrees |
Dull red, cherry............... | About 1470 degrees |
Red, full cherry................. | About 1650 degrees |
Red, bright | About 1830 degrees |
Orange, dull..................... | About 2010 degrees |
Orange, bright.................. | About 2190 degrees |
White heat..... ................ | About 2370 degrees |
White, welding.................. | About 2550 degrees |
White, dazzling.................. | About 2730 degrees |
 
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