scope:

1.1 This International Standard specifies the requirements for couplings for the transmission of power
between the rotating shafts of two machines for general purpose applications in the petroleum, petrochemical and natural gas industries. Such applications typically require couplings to transmit power at speeds not exceeding 4 000 r/min, between machines in which the first lateral critical speed is above the running speed range (stiff-shaft machines). It may, by agreement, be used for applications outside these limits.
1.2 This International Standard is applicable to couplings designed to accommodate parallel (or lateral) offset, angular misalignment and axial displacement of the shafts without imposing excessive mechanical loading on the coupled machines. Couplings covered by this International Standard include gear (and other mechanical contact types), metallic flexible-element and various elastomeric types. Such couplings may be of all metal construction or may include components of non-metallic materials such as composites. Special types such as clutch, hydraulic, eddy-current, rigid and radial-spline types, are not covered.
1.3 This International Standard covers design, materials of construction, inspection and testing of couplings and methods of attachment of the coupling to the shafts (including tapered sleeve and other proprietary devices).
1.4 This International Standard does not define criteria for the selection of coupling types for specific
applications.
NOTE 1 In many cases, couplings covered by this International Standard are manufacturer's catalogue items.
NOTE 2 For the following applications, the use of ISO 10441 is recommended:
. large or high-speed machines that may be required to operate continuously for extended periods, are often unspared and are critical to the continued operation of the installation (special purpose applications);
. machines in which the first lateral critical speed is less than the maximum required operating speed (flexible-shaft machines);
. machines where the rotor dynamics are particularly sensitive to coupling unbalance.