BS EN ISO 14903:2017 provides the qualification procedure for type approval of the tightness of hermetically sealed and closed components, joints and parts used in refrigerating systems and heat pumps as described in relevant parts of ISO 5149. The sealed and closed components, joints and parts concerned are, in particular, fittings, bursting discs, flanged or fitted assemblies. The tightness of flexible piping made from non-metallic materials is dealt with in ISO 13971. Metal flexible piping are covered by this document.

The requirements contained in this document are applicable to joints of maximum DN 50 and components of internal volume of maximum 5 l and maximum weight of 50 kg.

This document is intended to characterize their tightness stresses met during their operations, following the fitting procedure specified by the manufacturer, and to specify the minimal list of necessary information to be provided by the supplier of a component to the person in charge of carrying out this procedure.

It specifies the level of tightness of the component, as a whole, and its assembly as specified by its manufacturer.

It applies to the hermetically sealed and closed components, joints and parts used in the refrigerating installations, including those with seals, whatever their material and their design are.

This document specifies additional requirements for mechanical joints that can be recognized as hermetically sealed joints.


Cross References:
ISO 13971:2012
ISO 5149-2:2014 ED1
ISO 175:2010 Ed 3
ISO 5149-1:2014
EN 1593:1999
ISO 1817:2015 ED6
IEC 60068-2-64:2008
EN 13185:2001
ISO 7619-1:2010 Ed 2
EN 378-2:2016
EN 12263:1998
EN 14276-2:2007
IEC 60068-2-6:2007
EN 378-1:2016
EN 1779:1999
IEC 60335-2-34:2012
EN 13134:2000
EN 14276-1:2006
ISO 5149-4:2014 ED1
ISO 18517:2005 (R08) Ed 1
ISO 48:2010 Ed 5
EN 378-3:2016
ISO 5149-3:2014 ED1
EN 378-4:2016
EN 12693:2008


All current amendments available at time of purchase are included with the purchase of this document.