Hand-Book of Fire Protection for Improved Risks

Hand-Book of Fire Protection for Improved Risks

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ...more strongly than the lead and tin, and a deterioration of the solder itself is more likely. Such deterioration can be, either by a hardening of the solder or by a change in the character of the solder to a crystalline condition, easily broken even by the water hammer. ' It is much more difficult to protect sprinkler heads in such factories, where from the nature of the process of manufacturing, the head soon becomes coated with a fine dust. This class of factories comprise flouring mills, grain elevators, saw mills, furniture factories, where sandpaper drums are operated, grinding rooms in sugar refineries, candy factories, cement mills, plaster mills, drug and spice mills, etc. In all of these classes, the mere covering of the head with a loose dust will only slightly retard its action. Should, however, aqueous vapor be present, the fine dust soon becomes set and hardened, rendering the sprinkler head entirely inoperative. The writer has seen heads in sugar refineries so coated with a hard crystalline sugar deposit that a strong hammer blow was necessary to remove same. This is less likely to occur in fiouring mills, but is a very serious matter in cement mills, where the fine cement dust on the head, if aqueous vapors are present, will soon become as hard as stone. The coating of the sprinkler head with a deposit of vamish or hardened oil occurs principally in the dry rooms of oil cloth factories, patent leather works, rubber works, and in fact, all factories where varnish products are dried by artificial heat. The dryer, in evaporating, carries with it portions of the varnish or oil, as the case may be, and this coating deposited on the cold sprinkler head, in time covers it with a coating, which, by reason of the heat of the dry...show more

Product details

  • Paperback | 72 pages
  • 189 x 246 x 4mm | 145g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236917960
  • 9781236917966