BS ISO 14903:2012 pdf free
BS ISO 14903:2012 pdf free.Refrigerating systems and heat pumps Qualification of tightness of components and joints.
The requirements contained in this International Standard are applicable to joints of maximum DN 50 and components of maximum 5 land maximum mass of 50 kg.
This International Standard is intended to describe the qualification procedure for type approval of the tightness of components, joints and parts used in refrigerating systems and heat pumps as described in ISO 5149. It characterizes the joint tightness and stresses met when operating, 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.
This International Standard specifies the level of tightness of the component, as a whole, and its assembly as specified by the manufacturer.
This International Standard applies to the hermetically sealed and closed components, joints and parts used in refrigerating installations, including those with seals, whatever their material and their design are.
This International Standard specifies additional requirements for mechanical joints that can be recognized as hermetically sealed joints.
2 Normative references
The following documents In whole or in part are normatively referenced in this document and are indispensable for its application. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 51491:_1), Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1: Definitions, classification and selection criteria
ISO 51492:_2), Refrigerating systems and heat pumps — Safety and environmental requirements — Part 2: Desiqn, construction, testing, marking and documentation
EN 13134, Brazing — Procedure approval
ISO 13971:2012, Refrigerating systems and heat pumps — Flexible pipe elements, vibration isolators, expansion joints and non-metallic tubes — Requirements, design and installation
EN 12693, Refrigerating systems and heat pumps — Safety and environmental requirements — Positive displacement refrigerant compressors
ISO 175, Plastics — Methods of test for the determination of the effects of immersion in liquid chemicals
IEC 60068-2-64:1993, Environmental testing — Part 2: Test methods — Test Fh: Vibration, broad-band random (digital control) and guidance
IEC 60335-2-34, Household and similar electrical appliances — Safety — Part 2-34: Particular requirements for motor-compressors.BS ISO 14903 pdf free download.
