BS EN ISO 14903:2017
$167.15
Refrigerating systems and heat pumps. Qualification of tightness of components and joints
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 44 |
This document 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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references |
| 8 | 3 Terms and definitions |
| 9 | 4 Symbols 5 Test requirements |
| 14 | 6 Requirements for hermetically sealed systems 7 Test procedures 7.1 General 7.2 Sampling 7.3 Test temperature 7.4 Tightness test 7.4.1 General |
| 15 | 7.4.2 Tightness level control |
| 17 | 7.5 Requirements for joints 7.5.1 Test samples 7.5.2 Torque |
| 18 | 7.5.3 Reusable joint 7.5.4 Requirements for hermetically sealed joints 7.6 Pressure-temperature vibration tests (PTV) 7.6.1 General 7.6.2 Samples 7.6.3 Test method |
| 19 | 7.6.4 Method 1: Combined pressure-temperature cycle test with integrated vibration test |
| 21 | 7.6.5 Method 2: Combined pressure-temperature cycle test with a separate vibration test |
| 26 | 7.7 Operation simulation 7.8 Freezing test |
| 27 | 7.9 Additional pressure test for hermetically-sealed joints 7.10 Vacuum test |
| 28 | 7.11 Compatibility screening test 7.11.1 General 7.11.2 Test fluids 7.11.3 Test specimens 7.11.4 Test setup parameters |
| 29 | 7.11.5 Test procedure 7.11.6 Pass/fail criteria for sealing elements |
| 30 | 7.12 Fatigue test for hermetically sealed joints |
| 31 | 8 Test report 9 Information to the user |
| 32 | Annex A (informative) Equivalent tightness control levels |
| 38 | Annex B (normative) Test arrangements |
| 40 | Bibliography |
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