scope:

Cryofit Couplings are proprietary items which when fitted to the parent pipework form a permanent joint.

This NES:

gives information on the manufacture of the coupling, the type of couplings available and the method of installation using cryogenic cooling.

specifies the limitations on the use of the couplings in Surface Ships and Submarines and the reporting procedure to be adopted in Submarines.

is applicable to couplings suitable for pipes with outside diameters of 0.25" to 1.66" Imperial and 6 mm to 38 mm metric with pressures up to 4500 psi Imperial and 280 bar metric.