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EVS-EN ISO 13971:2025

Refrigeration systems and heat pumps - Flexible pipe elements, vibration isolators, expansion joints and non-metallic tubes - Requirements and classification (ISO 13971:2012)

General information

Valid from 01.10.2025
Base Documents
ISO 13971:2012; EN ISO 13971:2025
ICS Groups
27.080 Heat pumps 27.200 Refrigerating technology
Directives or regulations
None

Standard history

Status
Date
Type
Name
01.10.2025
Main
EVS-EN ISO 13971:2025
09.01.2009
Main
EVS-EN 1736:2008
This International standard describes requirements, design and installation of flexible pipe
elements (e.g.,
metallic flexible pipe, metallic flexible tube, vibration isolator, expansion joint) and non-metallic
tube used in the refrigerant circuits of refrigerating systems and heat pumps.
It also describes the requirements to qualify the tightness and permeability of non-metallic tubes
(e.g., plastic) used in evaporating and/or condensing sides of refrigerating systems and heat
pumps.
This International standard does not apply to flexible pipes that are only occasionally stressed
beyond the
elastic limit (e.g., during repair work), or to joints that are free to rotate or hinge.

Required fields are indicated with *

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Standard monitoring
English (PDF 453 KB)

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Standards designation

EVS Estonian standard
EN European standard (published by an CEN or CENELEC)
EN ISO International standard adopted as an European standard
ISO International Organization for Standardization’s standard
IEC International Electrotechnical Commission’s standard
HD CENELEC’s harmonisation document
   
EVS-EN European standard implemented in Estonia
EVS-EN ISO International standard adopted in Europe and implemented in Estonia
EVS-EN ISO/IEC International standard/International electrotechnical standard adopted in Europe and implemented in Estonia
EVS-IEC International electrotechnical standard implemented in Estonia
EVS-ISO International standard implemented in Estonia
   
A, AMD amedment
+A a full standard plus the amendment
/A only amendment
COR, AC corrigendum
+COR a full standard plus the corrigendum
NA national annex
+NA a full standard plus the national annex
/NA only national annex
TS technical specification
TR technical report
CWA agreement, developed by a CEN or CENELEC
prEVS-EN (etc) draft standard
   
et the standard is in Estonian only
en the standard is in English only
et-en the standard is in Parallel text Estonian-English