EN 13136:2001/A1:2005

Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Method for calculation

Modification of the requirements regarding external heat
sources, calculation of backpressure compensating valves with respect to reduced
stroke depending on pressure ratio and the design of upstream and downstream
lines.

Kälteanlagen und Wärmepumpen - Druckentlastungseinrichtungen und zugehörige Leitungen - Berechnungsverfahren

Systèmes de réfrigeration et pompes à chaleur - Dispositifs de pression et tuyauteries associèes - Methodes de calcul

Hladilni sistemi in toplotne črpalke - Tlačne varnostne naprave in njihove napeljave - Metode za izračun

General Information

• Status: Withdrawn
• Publication Date: 21-Jun-2005
• Withdrawal Date: 08-Oct-2013
• ICS: 27.080 - Heat pumps
• ICS: 27.200 - Refrigerating technology
• Technical Committee: CEN/TC 182 - Refrigerating systems, safety and environmental requirements
• Drafting Committee: CEN/TC 182/WG 2 - Design and testing
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 09-Oct-2013
• Completion Date: 09-Oct-2013
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: SIST EN 13136:2002/A1:2005 - Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Method for calculation

Relations

• Replaced By: EN 13136:2013 - Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation
• Effective Date: 16-Oct-2013
• Amends: EN 13136:2001 - Refrigerating systems and heat pumps - Pressure relief devices and their associated piping - Methods for calculation
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2005
+ODGLOQLVLVWHPLLQWRSORWQHþUSDONH7ODþQHYDUQRVWQHQDSUDYHLQQMLKRYH
QDSHOMDYH0HWRGH]DL]UDþXQ
Refrigerating systems and heat pumps - Pressure relief devices and their associated
piping - Method for calculation
Kälteanlagen und Wärmepumpen - Druckentlastungseinrichtungen und zugehörige
Leitungen - Berechnungsverfahren
Systemes de réfrigeration et pompes a chaleur - Dispositifs de pression et tuyauteries
associees - Methodes de calcul
Ta slovenski standard je istoveten z: EN 13136:2001/A1:2005
ICS:
27.080 7RSORWQHþUSDONH Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 13136:2001/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2005
ICS 27.080; 27.200
English version
Refrigerating systems and heat pumps - Pressure relief devices
and their associated piping - Method for calculation
Systèmes de réfrigeration et pompes à chaleur - Dispositifs Kälteanlagen und Wärmepumpen -
de pression et tuyauteries associèes - Methodes de calcul Druckentlastungseinrichtungen und zugehörige Leitungen -
Berechnungsverfahren
This amendment A1 modifies the European Standard EN 13136:2001; it was approved by CEN on 12 May 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Central Secretariat or to any CEN member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13136:2001/A1:2005: E
worldwide for CEN national Members.

Contents
Page
1 Modification to the Introduction.4
2 Modification of Clause 1 Scope .4
3 Modification of Clause 2 Normative references.4
4 Modification of Clause 3 Terms and definitions .4
5 Modification of Clause 4 Symbols .5
6 Modification of Clause 5 General.5
7 Modification of Subclause 6.2.1 External heat sources .5
8 Modification of Subclause 6.4 Liquid expansion.6
9 Modification of Subclause 7.1 General.6
10 Modification of Subclause 7.2.2 Critical and sub-critical flow.6
11 Modification of Subclause 7.2.5.1 General.6
12 Modification of Subclause 7.2.5.2 Calculation of the mass flow .6
13 Modification of Subclause 7.4.3 Pressure loss in the upstream line .7
14 Modification of Subclause 7.4.4 Pressure loss in the downstream line .7
15 Modification of Subclause B.1.1 .7
16 Modification of Subclause B.2.1 .7
17 Modification of Annex C .7
17.1 Modification of Subclause C.1.1 Assumptions for the calculation example .7
17.2 Modification of Subclause C.2.1 Calculation of the required minimum discharge capacity,
Q .8
md
17.3 Modification of Clause C.3 Calculation of flow area A selection of pressure relief valve.8
c
Foreword
This document (EN 13136:2001/A1:2005) has been prepared by the Technical Committee CEN/TC 182
“Refrigerating systems, safety and environmental requirements” the Secretariat of which is held by DIN.
This Amendment to the European Standard EN 13136:2001 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by December 2005, and conflicting
national standards shall be withdrawn at the latest by December 2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
1 Modification to the Introduction
Amend the introduction as follows:
This European Standard is based on applicable parts of EN ISO 4126-1:2004, EN ISO 4126-2:2003 and
EN 12284.
It is suited to the specific requirements, and includes the data, of refrigerating systems. It provides means of
satisfying the pressure relief devices requirements of EN 378-2.
2 Modification of Clause 1 Scope
Amend subclause 1.3 as follows:
1.3 This European Standard specifies the requirements for selection of pressure relief devices to prevent
excessive pressure due to internal and external heat sources, the sources of increasing pressure (e.g.
compressor, heaters, etc.) and thermal expansion of trapped liquid.
Add the following subclause after 1.4:
1.5 This European Standard refers to other relevant standards in clause 5 General.
3 Modification of Clause 2 Normative references
The cited drafts will be replaced by the following standards.
EN ISO 4126-1, Safety devices for protection against excessive pressure — Part 1: Safety valves (ISO 4126-
1:2004).
EN ISO 4126-2, Safety devices for protection against excessive pressure — Part 2: Bursting disc safety
devices (ISO 4126-2:2003).
EN 12284, Refrigerating systems and heat pumps — Valves — Requirements, testing and marking.
EN 764 will be replaced by:
EN 764-1, Pressure equipment - Part 1: Terminology - Pressure, temperature, volume, nominal size
EN 764-2, Pressure equipment - Part 2: Quantities, symbols and units
4 Modification of Clause 3 Terms and defini
...