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Updated: June 19, 2025
The plug of each cock has on its side a small hollow, which during one part of its revolution presents itself under the oil-pipe, and receives a charge of oil.
An oil-pipe line is seriously contemplated from Baku to replace the iron-tank cars now run on the railroad. Big fortifications are under headway to protect the harbor; its strategic importance as the terminus of the Caucasus Railway and the shipping point for troops and war material making Batoum a place of special solicitation on the part of the Russian military authorities.
In the oil-pipe, the pipe ends and sockets are cut on a taper of 3/4 inch to 1 foot, for a 4-inch pipe, and the socket used is thicker than the steam and water socket, is 33/4 inches long, and has entrance for 1 5/8 inches of thread on each pipe end tapped with 9 standard threads to the inch.
It is a lap-welded, wrought-iron pipe of superior material, and made with exceeding care and thoroughly tested at the works. The pipe is made in lengths of 18 feet, and these pieces are connected by threaded ends and extra strong sleeves. The pipe-thread and sleeves used on the ordinary steam and water pipe are not strong enough for the duty demanded of the oil-pipe.
Out of a million instances, take that little story of a Mr. Lindsay, superintendent of a pumping station at some oil-wells in Mesopotamia. A valve in the oil-pipe had split, and a fountain of oil was being thrown up on all sides, while, thirty yards off, and nothing between, the furnaces were in full blast.
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