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SLOVENSKI STANDARD
01-julij-2017
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Refrigerating systems and heat pumps - Pressure relief devices and their associated
piping - Methods for calculation
Kälteanlagen und Wärmepumpen - Druckentlastungseinrichtungen und zugehörige
Leitungen - Berechnungsverfahren
Systèmes frigorifiques et pompes à chaleur - Dispositifs de limitation de pression et
tuyauteries associées - Méthodes de calcul
Ta slovenski standard je istoveten z: EN 13136:2013/prA1:2017
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.
DRAFT
EUROPEAN STANDARD
EN 13136:2013
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2017
ICS 27.080; 27.200
English Version
Refrigerating systems and heat pumps - Pressure relief
devices and their associated piping - Methods for
calculation
Systèmes frigorifiques et pompes à chaleur - Dispositifs Kälteanlagen und Wärmepumpen -
de limitation de pression et tuyauteries associées - Druckentlastungseinrichtungen und zugehörige
Méthodes de calcul Leitungen - Berechnungsverfahren
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 182.
This draft amendment A1, if approved, will modify the European Standard EN 13136:2013. If this draft becomes an amendment,
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.
This draft amendment was established by CEN 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 CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13136:2013/prA1:2017:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Modification to Annex A, "Values of functions, factors and properties of refrigerants" . 4
2 Modification to Annex C, "Example of calculation for sizing pressure relief devices
with the corresponding pipes" . 12
European foreword
This document (EN 13136:2013/prA1:2017) has been prepared by Technical Committee CEN/TC 182
“Refrigerating systems, safety and environmental requirements”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA of EN 13136:2013, which is an integral
part of this document.
1 Modification to Annex A, "Values of functions, factors and properties of
refrigerants"
Replace Table A.1 with the following table:
"Table A.1 — Properties of refrigerants
Refrigerant Description Formula Isentropic Critical Function
a b
number exponent pressure of the
b isentropic
ratio
b
exponent
Composition = % weight K (p /p ) C
b o
R-11 Trichlorofluoromethane CCl F 1,10 0,59 2,48
R-12 Dichlorodifluoromethane CCl F 1,12 0,58 2,49
2 2
R-12B1 Bromochlorodifluoromethane CBrClF 1,11 0,58 2,49
R-13 Chlorotrifluoromethane CClF3 1,14 0,58 2,51
R-13B1 Bromotrifluoromethane CBrF 1,13 0,58 2,50
R-14 Carbon tetrafluoride CF 1,16 0,57 2,53
R-22 Chlorodifluoromethane CHClF 1,17 0,57 2,54
R-23 Trifluoromethane CHF 1,19 0,57 2,55
R-30 Methylene chloride CH Cl 1,15 0,57 2,52
2 2
R-32 Difluoromethane CH F 1,24 0,56 2,59
2 2
R-50 Methane CH 1,31 0,54 2,64
R-113 1,1,2-Trichloro-1,2,2-Trifluoroethane CCl FCClF 1,06 0,59 2,45
2 2
R-114 1,2-Dichloro-1,1,2,2-Tetrafluoroethane CClF CClF 1,04 0,60 2,43
2 2
R-115 2-Chloro-1,1,1,2,2-Pentafluoroethane CF CClF 1,09 0,59 2,47
3 2
R-116 Hexafluoroethane CF CF 1,09 0,59 2,47
3 3
R-123 2,2-Dichloro-1,1,1-Trifluoroethane CF CHCl 1,10 0,59 2,48
3 2
R-124 2-Chloro-1,1,1,2-Tetrafluoroethane CF CHClF 1,10 0,58 2,48
R-125 Pentafluoroethane CF CHF 1,10 0,58 2,48
3 2
R-134a 1,1,1,2-Tetrafluoroethane CF CH F 1,12 0,58 2,50
3 2
R-141b 1,1-Dichloro-1-Fluoroethane CCl FCH 1,10 0,58 2,48
2 3
R-142b 1-Chloro-1,1-Difluoroethane CClF2CH3 1,12 0,58 2,50
R-143a 1,1,1-Trifluoroethane CF CH 1,13 0,58 2,50
3 3
R-152a 1,1-Difluoroethane CHF CH 1,15 0,57 2,52
2 3
R-170 Ethane CH CH 1,20 0,56 2,56
3 3
R-218 Octafluoropropane C F 1,07 0,59 2,45
3 8
R-227ea 1,1,1,2,3,3,3-heptafluoropropane CF CHFCF 1,07 0,59 2,46
3 3
R-236fa 1,1,1,3,3,3-hexafluoropropane CF CH CF 1,08 0,59 2,47
3 2 3
R-245fa 1,1,1,3,3-pentafluoropropane CF CH CHF 1,10 0,58 2,48
3 2 2
R-290 Propane CH CH CH 1,19 0,57 2,55
3 2 3
Refrigerant Description Formula Isentropic Critical Function
a b
number exponent pressure of the
b isentropic
ratio
b
exponent
Composition = % weight K (p /p ) C
b o
R-401A R-22/152a/124 (53/13/34) CHClF + 1,15 0,57 2,52
CHF CH +
2 3
CF CHClF
R-401B R-22/152a/124 (61/11/28) CHClF + 1,16 0,57 2,53
CHF CH +
2 3
CF CHClF
R-401C R-22/152a/124 (33/15/52) CHClF + 1,14 0,58 2,51
CHF CH +
2 3
CF CHClF
R-402A R-125/290/22 CF CHF + 1,13 0,58 2,51
3 2
CH CH CH +
3 2 3
CHClF
R-402B R-125/290/22 (38/2/60) CF CHF + 1,15 0,57 2,52
3 2
CH CH CH +
3 2 2
CHClF
R-403A R-22/218/290 (75/29/5) CHClF + 1,15 0,57 2,52
C F +C H
3 8 3 8
R-403B R-22/218/290 (56/39/5) CHClF + 1,13 0,58 2,50
C F +C H
3 8 3 8
R-404A R-125/143a/134a (44/52/4) CF CHF + 1,12 0,58 2,49
3 2
CF CH +
3 3
CF CH F
3 2
R-405A R-22/152a/142b/C318 CHClF + 1,12 0,58 2,50
CHF CH +
2 3
(45/7/5,5/42,5)
CClF CH + C F
2 3 4 8
R-406A R-22/142b/600a (55/41/4) CHClF + 1,10 0,58 2,48
CClF CH +
2 3
CH(CH )
3 3
R-407A R-32/125/134a (20/40/40) CH F + 1,14 0,58 2,51
2 2
CF CHF +
3 2
CF CH F
3 2
R-407B R-32/125/134a (10/70/20) CH F + 1,12 0,58 2,50
2 2
CF CHF +
3 2
CF CH F
3 2
Refrigerant Description Formula Isentropic Critical Function
a b
number exponent pressure of the
b
isentropic
ratio
b
exponent
Composition = % weight K (p /p ) C
b o
R-407C R-32/125/134a (23/25/52) CH F + 1,14 0,58 2,51
2 2
CF CHF +
3 2
CF CH F
3 2
R-407D R-32/125/134a (15/15/70) CH F + 1,14 0,58 2,51
2 2
CF CHF +
3 2
CF CH F
3 2
R-407E R-32/125/134a (25/15/60) CH F + 1,15 0,57 2,52
2 2
CF CHF +
3 2
CF CH F
3 2
R-407F R-32/125/134a (30/30/40) CH F + 1,15 0,57 2,52
2 2
CF CHF +
3 2
CF CH F
3 2
R-408A R-125/143a/22 (7/46/47) CF CHF + 1,15 0,58 2,52
3 2
CF CH +
3 3
CHClF
R-409A R-22/124/142b (60/25/15) CHCIF + 1,15 0,57 2,52
CF CHClF+
CH CClF
3 2
R-409B R-22/124/142b (65/25/10) CHCIF + 1,16 0,57 2,53
CF CHClF+
CH CClF
3 2
R-410A R-32/125 (50/50) CH F + 1,17 0,57 2,54
2 2
CF CHF
3 2
R-410B R-32/125 (45/55) CH F + 1,17 0,57 2,53
2 2
CF CHF
3 2
R-411A R-1270/22/152a C H + CHClF + 1,18 0,57 2,54
3 6 2
(1,5/87,5/11,0) CHF CH
2 3
R-412A R-22/218/142b (70/5/25) CHClF + 1,16 0,57 2,53
C F +
3 8
CClF2CH3
R-413A R-218/134a/600a (9/88/3) C F + CF CH F+
3 8 3 2
1,11 0,58 2,49
CH(CH )
3 3
R-414A R-22/124/600a/142b CHClF +
(51,0/28,5/4,0/16,5) CF CHClF+
1,14 0,58 2,51
C
...