GB/T 29751-2013Requirement for adoption and installation of piping compensatory couplings (English PDF)

3.1 Song sets compensation joints sleeveexpansionjoint

By the body, seals, consisting of the pressing member for absorbing axial displacement, but can not withstand the pressure thrust of the pipe loose set of connected devices.

[GB/T 12465-2007, Definition 3.1]

3.2 Compensation limit set loose fitting sleevelimitedexpansionjoint

By a loose set of compensation limit expansion joints and tubes and other components composition, to prevent excessive displacement due to lead pipe leakage or damage compensation joints for

Pipeline absorb axial displacement and withstand the pressure thrust within the allowable range of displacement means sets loose connections.

[GB/T 12465-2007, 3.2 Definition]

3.3 Song sets of power transmission connectors compensating

By the Falan Song sets compensation joints and short pipe flanges, and other components of power transmission screw components. Passed by the connecting member and the pressure thrust compensation pipeline safety

Loading error, does not absorb axial displacement. Means and loose tube pumps, valves and other accessories for the connection.

[GB/T 12465-2007, the definition 3.3]

3.4 Large deflection compensation set loose joints largeflexibilityexpansionjoint

By a short pipe flange, body, gland, ring, stopper, sealing, clamping member, used to absorb axial displacement and deflection of 6 ° ~ 7 °

Angular displacement of the pipe loose set of connected devices.

[GB/T 12465-2007, the definition 3.4] […]