ISO 6182-18:2025

FINAL DRAFT
International
Standard
ISO/FDIS 6182-18
ISO/TC 21/SC 5
Fire protection — Automatic
Secretariat: ANSI
sprinkler system —
Voting begins on:
2025-05-20
Part 18:
Requirements and test methods for
Voting terminates on:
2025-07-15
flexible sprinkler hose
Protection contre l'incendie — Systèmes d'extinction
automatiques du type sprinkler —
Partie 18: Exigences et méthodes d'essai pour sprinkler à tuyau
flexible
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 6182-18:2025(en) © ISO 2025

FINAL DRAFT
ISO/FDIS 6182-18:2025(en)
International
Standard
ISO/FDIS 6182-18
ISO/TC 21/SC 5
Fire protection — Automatic
Secretariat: ANSI
sprinkler system —
Voting begins on:
Part 18:
Requirements and test methods for
Voting terminates on:
flexible sprinkler hose
Protection contre l'incendie — Systèmes d'extinction
automatiques du type sprinkler —
Partie 18: Exigences et méthodes d'essai pour sprinkler à tuyau
flexible
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 SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 6182-18:2025(en) © ISO 2025

ii
ISO/FDIS 6182-18:2025(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Product consistency . 3
5 Requirements . 3
5.1 Nominal sizes .3
5.2 Rated working pressure . .3
5.3 Dimensions .3
5.3.1 Flexible hose length .3
5.3.2 Inlet fitting .3
5.3.3 Outlet fitting .3
5.3.4 End connections .3
5.3.5 Minimum inside diameter .3
5.4 Materials .4
5.5 Tolerance .5
5.6 Performance .5
5.6.1 Dimensional examination .5
5.6.2 Change of length .5
5.6.3 Leakage .5
5.6.4 Hydrostatic strength .5
5.6.5 Vacuum .5
5.6.6 Pressure cycling .5
5.6.7 U-bend fatigue .6
5.6.8 Arc bend fatigue .6
5.6.9 Anchoring components mechanical strength .6
5.6.10 Vibration .6
5.6.11 High pressure flow .6
5.6.12 Pressure loss (equivalent length determination) .6
5.6.13 High temperature exposure .6
5.6.14 Low temperature exposure .6
5.6.15 Salt spray corrosion .7
5.6.16 Moist ammonia air stress cracking .7
5.6.17 Stress corrosion cracking .7
5.6.18 Metallic coating thickness .7
6 Test methods . 7
6.1 Dimensional examination test .7
6.2 Change of length test .7
6.3 Leakage test .7
6.4 Hydrostatic strength test .8
6.5 Vacuum test .8
6.6 Pressure cycling test .8
6.6.1 Test option 1 .8
6.6.2 Test option 2 .8
6.7 U-bend fatigue test .9
6.8 Arc bend fatigue test .9
6.9 Anchoring components mechanical strength test .10
6.10 Vibration test .11
6.11 High pressure flow test . 12
6.12 Pressure/Friction loss test . 12
6.13 High temperature exposure test . 13
6.14 Low temperature exposure test . 13
6.15 Salt spray corrosion test .14

iii
ISO/FDIS 6182-18:2025(en)
6.16 Moist ammonia air stress cracking test .14
6.17 Stress corrosion cracking test . 15
6.18 Metallic coating thickness test . 15
6.18.1 General . 15
6.18.2 Gravimetric determination of the mass per area . 15
6.18.3 Measurement of coating thickness by X-ray spectrometry . 15
6.18.4 Magnetic determination of coating thickness .16
6.18.5 Other methods .
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ISO /TC 21/SC 5
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Secretariat: ANSI
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Date: 2025-04-19xx
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Fire protection — Automatic sprinkler systems — system —
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Part 18: Style Definition
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Requirements and test methods for flexible sprinkler hose Style Definition
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Protection contre l'incendie — Systèmes d'extinction automatiques du type sprinkler —
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Partie 18: Exigences et méthodes d'essai pour sprinkler à tuyau flexible
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ISO/FDIS 6182-18:2025(en)
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
Formatted: Adjust space between Latin and Asian text,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
Adjust space between Asian text and numbers
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: French (France)
Formatted: French (France)
Fax: +41 22 749 09 47
EmailE-mail: copyright@iso.org
Formatted: French (France)
Website: www.iso.orgwww.iso.org
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Latin and Asian text, Adjust space between Asian text
Published in Switzerland
and numbers
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spacing: single
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ii © ISO 2020 2025 – All rights reserved

ii
ISO/FDIS 6182-18:2025(en)
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Contents
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Foreword . vi
stops: Not at 11.07 cm
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Product consistency . 3
5 Requirements . 4
5.1 Nominal sizes . 4
5.2 Rated working pressure . 4
5.3 Dimensions. 4
5.4 Materials . 5
5.5 Tolerance . 5
5.6 Performance . 6
6 Test methods . 8
6.1 Dimensional examination test . 8
6.2 Change of length test . 8
6.3 Leakage test . 9
6.4 Hydrostatic strength test . 9
6.5 Vacuum test . 9
6.6 Pressure cycling test . 9
6.7 U-bend fatigue test . 10
6.8 Arc bend fatigue test . 11
6.9 Anchoring components mechanical strength test . 12
6.10 Vibration test . 13
6.11 High pressure flow test . 15
6.12 Pressure/Friction loss test . 15
6.13 High temperature exposure test . 15
6.14 Low temperature exposure test . 16
6.15 Salt spray corrosion test . 17
6.16 Moist ammonia air stress cracking test . 17
6.17 Stress corrosion cracking test . 18
6.18 Metallic coating thickness test . 18
7 Markings . 18
8 Manufacturer’s installation instructions . 19
9 Manufacturer’s quality control testing and requirements . 20
Annex A (normative) Tolerances . 21
Bibliography . 22

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Foreword . 4
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1 Scope . 1
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2 Normative references . 1
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3 Terms and definitions . 1
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4 Product consistency . 3
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5 Requirements . 3
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© ISO 2025 – All rights reserved
iii
ISO/FDIS 6182-18:2025(en)
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5.1 Nominal sizes . 3
5.2 Rated Working Pressure . 3
5.3 Dimensions. 3
5.3.1 Flexible Hose length . 3
5.3.2 Inlet fitting . 3
5.3.3 Outlet fitting . 3
5.3.4 End connections . 3
5.3.5 Minimum Inside Diameter . 3
5.4 Materials . 4
5.5 Tolerance . 4
5.6 Performance . 5
5.6.1 Dimensional examination . 5
5.6.2 Change of length . 5
5.6.3 Leakage . 5
5.6.4 Hydrostatic strength . 5
5.6.5 Vacuum . 5
5.6.6 Pressure Cycling . 5
5.6.7 U-bend fatigue . 5
5.6.8 Arc Bend Fatigue . 5
5.6.9 Anchoring components mechanical strength . 6
5.6.10 Vibration . 6
5.6.11 High pressure flow . 6
5.6.12 Pressure loss (equivalent length determination). . 6
5.6.13 High temperature exposure . 6
5.6.14 Low temperature exposure . 6
5.6.15 Salt spray corrosion .
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