To joint two or more sections of pipe into a single continuous conduit.
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A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. Couplings do not normally allow disconnection of shafts during operation.
A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power. Couplings do not normally allow disconnection of shafts during operation, however there are torque limiting couplings which can slip or disconnect when some torque limit is exceeded.The primary purpose of couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. By careful selection, installation and maintenance of couplings, substantial savings can be made in reduced maintenance costs and downtime.
knuckle threads are used in railway carriage couplings.
Unfortunately, the answer to that question is difficult to come by without knowing the location and use of the rotary couplings. The answer could be anywhere from $200-$2000. Please specify use for rotary couplings.
Pipe
Jon R. Mancuso has written: 'Couplings and joints' -- subject(s): Couplings, Joints (Engineering)
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"http://wiki.answers.com/Q/What_are_Dressler_couplings"
Rotary couplings is a mechanism used to move fluid that is under pressure from a static inlet to a rotating inlet. They can be bought at sites like DSTI and Amazon.