SIST EN ISO 811:2018

Textile - Determination of resistance to water penetration - Hydrostatic pressure test (ISO 811:2018)

ISO 811:2018 specifies a hydrostatic pressure method for determining the resistance of fabrics to penetration by water. The method is applicable to all types of fabrics which are intended to be water resistant whether or not they have been given a water-resistant or water-repellent finish.

Textilien - Bestimmung des Widerstandes gegen das Durchdringen von Wasser - Hydrostatischer Druckversuch (ISO 811:2018)

Dieses Dokument legt ein hydrostatisches Druckverfahren für die Bestimmung des Widerstands von textilen Flächengebilden gegen das Durchdringen von Wasser fest. Dieses Verfahren ist auf alle Arten von textilen Flächengebilden anwendbar, die wasserbeständig sein sollen, unabhängig davon, ob sie einer Wasserbeständigkeits- oder wasserabweisenden Veredlung unterzogen wurden.

Textiles - Détermination de la résistance à la pénétration de l'eau - Essai sous pression hydrostatique (ISO 811:2018)

L'ISO 811:2018 spécifie une méthode d'essai sous pression hydrostatique permettant de déterminer la résistance des étoffes à la pénétration de l'eau. Cette méthode est applicable à tous les types d'étoffes destinés à être imperméables à l'eau, qu'ils aient reçu ou non une finition imperméable à l'eau ou déperlante.

Tekstilije - Ugotavljanje neprepustnosti za vodo - Hidrostatično tlačni preskus (ISO 811:2018)

Ta dokument določa hidrostatično tlačno metodo za ugotavljanje neprepustnosti tkanin za vodo. Ta metoda se uporablja za vse vrste tkanin, ki naj bi bile odporne proti vlagi, ne glede na to, ali imajo vodoodporno ali vodoodbojno površino.

General Information

• Status: Published
• Public Enquiry End Date: 01-Nov-2016
• Publication Date: 11-Jun-2018
• ICS: 59.080.01 - Textiles in general
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Jun-2018
• Due Date: 09-Aug-2018
• Completion Date: 12-Jun-2018
• Ref Project: EN ISO 811:2018 - Textiles - Determination of resistance to water penetration - Hydrostatic pressure test (ISO 811:2018)

Relations

• Replaces: SIST EN 20811:1996 - Textiles - Determination of resistance to water penetration - Hydrostatic pressure test
• Effective Date: 01-Jul-2018
• Refers: SIST ISO 3696:1995 - Water for analytical laboratory use -- Specification and test methods
• Effective Date: 09-Feb-2026
• Refers: SIST EN 13480-6:2012/A1:2017 - Metallic industrial piping - Part 6: Additional requirements for buried piping
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 50286:2025 - Electrical insulating protective clothing for low-voltage installations
• Effective Date: 09-Feb-2026
• Referred By: SIST EN 868-2:2009 - Packaging for terminally sterilized medical devices - Part 2: Sterilization wrap - Requirements and test methods
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13795:2011 - Surgical drapes, gowns and clean air suits, used as medical devices for patients, clinical staff and equipment - General requirements for manufacturers, processors and products, test methods, performance requirements and performance levels
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13561:2004+A1:2009 - External blinds - Performance requirements including safety
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 659:2003+A1:2008 - Protective gloves for firefighters
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 10077-2:2017 - Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 2: Numerical method for frames (ISO 10077-2:2017)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 868-9:2009 - Packaging for terminally sterilized medical devices - Part 9: Uncoated nonwoven materials of polyolefines - Requirements and test methods
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 10077-2:2012 - Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 2: Numerical method for frames (ISO 10077-2:2012)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13795-1:2025 - Surgical clothing and drapes - Requirements and test methods - Part 1: Surgical drapes and gowns
• Effective Date: 28-Jan-2026
• Referred By: SIST-TS CEN/TS 14237:2016 - Textiles for healthcare and social services facilities
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 10211:2017 - Thermal bridges in building construction - Heat flows and surface temperatures - Detailed calculations (ISO 10211:2017)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 13561:2015 - External blinds and awnings - Performance requirements including safety
• Effective Date: 28-Jan-2026

Overview

SIST EN ISO 811:2018 is a European and international standard that specifies a uniform method for determining the resistance of textiles to water penetration using a hydrostatic pressure test. This standard is applicable to all types of fabrics that are intended to be water resistant, regardless of whether they have undergone water-resistant or water-repellent treatments. The methodology described provides a consistent approach to assess the hydrostatic head supported by a fabric, which is a direct indicator of the material’s waterproof performance.

Key Topics

• Hydrostatic Pressure Test Principle: The fabric sample is subjected to steadily increasing water pressure until water penetrates the material in three distinct places. The pressure at the moment the third penetration occurs is recorded as the test result.
• Applicability: Suitable for all fabrics intended to resist water penetration, including those with or without special finishes.
• Test Conditions: Specifies details for specimen handling, conditioning, clamping, and water temperature (with measurements typically at either 20°C or 27°C).
• Pressure Application: Water pressure can be applied from above or below the fabric; test parameters and any variations must be recorded in the test report.
• Sampling and Results Reporting:
  • Minimum of five specimens from different fabric areas are required to ensure statistical validity.
  • Individual pressures and the mean result are to be reported, measured in centimeters or millibars of water.
  • Requires test atmosphere conditioning and specifies acceptable accuracy levels for measurement.
• Documentation: Clear requirements for test reporting, including reference to test conditions, specimen details, and any deviations from the standard procedure.

Applications

• Textiles Manufacturing: Ensures that technical textiles, garments, and protective clothing meet industry or regulatory standards for water resistance.
• Quality Assurance: Supports manufacturers, suppliers, and laboratories in quality control processes and in substantiating product claims regarding water penetration resistance.
• Product Development: Provides a basis for research and development of advanced water-resistant materials for outdoor equipment, sportswear, and industrial applications.
• Certification and Compliance: Facilitates conformity with European and international regulations, assisting companies in market access and harmonized product evaluation.

Common products tested using the ISO 811 hydrostatic pressure test include:

• Outdoor apparel (rainwear, jackets)
• Tents and shelters
• Upholstery and technical textiles for industrial use
• Protective workwear and uniforms
• Medical and hygienic textiles where fluid resistance is critical

Related Standards

• ISO 139: Textiles - Standard atmospheres for conditioning and testing, essential for controlling environmental factors that can affect test outcomes.
• ISO 3696: Specifies water quality for analytical laboratory use, which is relevant for preparing water used in the hydrostatic pressure test.
• ISO 2859-1: Sampling procedures for inspection by attributes, can be applied for broader quality control during product evaluation.

SIST EN ISO 811:2018 supersedes previous standards such as EN 20811:1992 and aligns closely with the requirements of international test methodologies for water penetration.

Practical Value

This standard ensures that all participants in the textile supply chain-manufacturers, testing laboratories, and regulatory authorities-apply a consistent, reliable method to evaluate and compare the water resistance performance of textiles. Adhering to SIST EN ISO 811:2018 supports product safety, reliability, and consumer satisfaction across global markets by clearly defining how to measure and report fabric resistance to water penetration using hydrostatic pressure testing.

Keywords: hydrostatic pressure test, water resistance, textile standards, ISO 811, water penetration, quality control, waterproof fabrics, textile testing, SIST EN ISO 811:2018.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2018
1DGRPHãþD
SIST EN 20811:1996
7HNVWLOLMH8JRWDYOMDQMHQHSUHSXVWQRVWL]DYRGR+LGURVWDWLþQRWODþQLSUHVNXV,62

Textile - Determination of resistance to water penetration - Hydrostatic pressure test (ISO
811:2018)
Textilien - Bestimmung des Widerstandes gegen das Durchdringen von Wasser -
Hydrostatischer Druckversuch (ISO 811:2018)
Textiles - Détermination de la résistance à la pénétration de l'eau - Essai sous pression
hydrostatique (ISO 811:2018)
Ta slovenski standard je istoveten z: EN ISO 811:2018
ICS:
59.080.01 Tekstilije na splošno Textiles in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 811
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2018
EUROPÄISCHE NORM
ICS 59.080.30 Supersedes EN 20811:1992
English Version
Textiles - Determination of resistance to water penetration
- Hydrostatic pressure test (ISO 811:2018)
Textiles - Détermination de la résistance à la Textilien - Bestimmung des Widerstandes gegen das
pénétration de l'eau - Essai sous pression Durchdringen von Wasser - Hydrostatischer
hydrostatique (ISO 811:2018) Druckversuch (ISO 811:2018)
This European Standard was approved by CEN on 15 March 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard 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 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 811:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 811:2018) has been prepared by Technical Committee ISO/TC 38 “Textiles” in
collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2018, and conflicting national standards
shall be withdrawn at the latest by November 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 20811:1992.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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 the United Kingdom.
Endorsement notice
The text of ISO 811:2018 has been approved by CEN as EN ISO 811:2018 without any modification.

INTERNATIONAL ISO
STANDARD 811
Second edition
2018-03
Textiles — Determination of
resistance to water penetration —
Hydrostatic pressure test
Textiles — Détermination de la résistance à la pénétration de l'eau —
Essai sous pression hydrostatique
Reference number
ISO 811:2018(E)
©
ISO 2018
ISO 811:2018(E)
© ISO 2018
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, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 811:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Atmosphere for conditioning and testing . 2
8 Test specimen . 3
9 Test procedure . 3
10 Calculations and expression of results. . 4
11 Test report . 4
Bibliography . 5
ISO 811:2018(E)
Foreword
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