Protecting Exposed Water Pipe

Protecting Exposed Water Pipe

The subject of the protection of water pipes crossing over or under railroad bridges and culverts is one that has provoked frequent discussion among water works men. The liability of the pipe to fracture from the vibration and shock attendant on the movement of trains over such bridges and cross-overs is well known and is one of the severe problems the average superintendent has to wrestle with. There have been several remedies suggested for this difficulty. One of these, and the one most generally adopted is the placing of the pipe where it crosses the railroad, within a pipe or conduit of much larger diameter. The space between is then filled with some light or soft material. The exterior pipe of large dimensions receives the vibration which is not communicated to the inside pipe, as the soft filling takes up whatever shock the larger pipe may have failed to receive.

Some interesting experiments along this line are brought out in a paper in this week’s issue of FIRE AND WATER ENGINEERING. It is written by G. H. Finneran, who is superintendent of water service in the city of Boston, and treats of the care and maintenance by Boston of its exposed pipe lines and other portions of the distribution system.

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