This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...used without serious results. system. for preventing the operation of the sprinkler It is stated that the action of hot water on the iron pipe causes the segregation of nitrogen gas from the entangled air in the water, and this is a good non-conductor. The gas collects in the small offsets and after a period of time ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...used without serious results. system. for preventing the operation of the sprinkler It is stated that the action of hot water on the iron pipe causes the segregation of nitrogen gas from the entangled air in the water, and this is a good non-conductor. The gas collects in the small offsets and after a period of time practically fills them. While this gas is a good insulator, the fact that the sprinkler heads do not open is primarily because the heat is radiated from the offset and from the head faster than it is supplied to them by conduction; also because there is no circulation in these offsets. While no heads have as yet opened from the heat of the system, the frames become so hot that one cannot bear the hand upon them for long without discomfort. The struts, however, are noticeably cooler than the frame. Whether this feature would be so marked in heads of other types is not known. This system, slightly modified, is now being installed in a mill in Lewiston, Me. Another system has recently been installed in a fireproof factory in Cambridge, Mass. This system was somewhat complicated by having two risers each containing a 6-inch alarm valve. The two systems were tied together above the alarm valves and so arranged that in order to shut off the flow from a sprinkler head it was necessary to close two sprinkler valves and one hot water valve. As it was not considered desirable to install an expansion tank at the top of the system, it was found necessary to make a connection through a small pipe to a domestic service connection so that the expansion and contraction could be properly cared for. During an unusually cold spell, the heating system was forced in order to keep the building warm, and as a result two sprinklers opened from excessive heat. The offse...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.