SIST EN 4429:2010

• Abstract:

  This standard defines the general requirements for the determination of warp bow of narrow woven fabrics by measurement testing.

• Status: Published
• Publication Date: 21-Jan-2010
• ICS: 49.025.60 - Textiles
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-Apr-2009
• Due Date: 04-Jul-2009
• Completion Date: 22-Jan-2010
• Ref Project: EN 4429:2006 - Aerospace series - Textiles - Testing of narrow woven fabrics - Determination of warp bow

• Refers: SIST EN 4415:2009 - Aerospace series - Non-metallic materials - Textiles - Narrow woven fabrics - Technical specification
• Effective Date: 28-Jan-2026

SIST EN 4429:2010 is the Slovenian adoption of EN 4429:2006 for aerospace textiles. It specifies a measurement test for determining warp bow in narrow woven fabrics, so laboratories and quality staff can assess fabric shape against a common method. The document tells users how to prepare the samples, make the measurement, calculate the result, and report it.

What does SIST EN 4429:2010 specify?

SIST EN 4429:2010 specifies the general requirements for determining warp bow in narrow woven fabrics by measurement testing. In practice, it is a laboratory method for checking how far a fabric edge departs from a straight, parallel line.

The standard is organized into clauses covering scope, normative references, terms and definitions, health and safety, principle, resources, test samples, testing procedure, expression of results, measurement uncertainties, designation, and test report. That structure matters because it takes the user from sample preparation through to a traceable test report.

What are the key requirements of SIST EN 4429:2010?

• Clause 4 - Health and safety: SIST EN 4429:2010 leaves safety arrangements to the user and reminds the laboratory to apply normal test-house practice and local legal requirements. This means the method can be used only within a controlled and safe laboratory environment.

• Clause 5 - Principle/technique: The warp bow is measured on a narrow woven fabric laid on a plane surface after conditioning. The key practical point is that the fabric must be measured in a relaxed state, not while stretched or corrected by hand.

• Clause 6 - Resources: The method requires a marked test plate, a ruler, and a set square. These tools create the reference line and the measured offset, so the setup is part of the result.

• Clause 7 - Test samples/Test pieces: Three test pieces are cut for the test. Using more than one piece gives a result that reflects the fabric sample rather than a single local defect.

• Clause 8 - Testing procedure: SIST EN 4429:2010 requires conditioning the test pieces flat and without tension in the standard atmosphere given by EN 4415, then keeping them in that atmosphere until testing. The specimen is laid flat along the plate axis, allowed to settle, and then measured against the ruler and set square. This matters because temperature and humidity control can affect textile shape.

• Clause 9 - Expression of results: The result is the arithmetic mean of the three measured values, expressed in millimetres. For users, this means the reported figure is a combined test result, not a single reading.

• Clause 10 - Measurement uncertainties: The standard states that precision is not known because inter-laboratory data are not available. In practice, users should avoid treating the method as precision-characterized for statistical comparison.

• Clause 12 - Test report: The report must identify the method, test conditions, equipment, product and specimen traceability, individual values and the mean, the tester, any incidents, deviations, and the test date. This supports audit trails and product acceptance records.

What terms does SIST EN 4429:2010 define?

• Warp bow - the deformation, or deflexion, that a narrow woven fabric takes in its plane relative to the straight, parallel edges it should have.

• Narrow woven fabrics - the textile form tested by this standard, used here in an aerospace context.

• Test piece - each cut piece of fabric prepared for measurement in the procedure.

• Specimen - the fabric piece laid on the test plate and measured for warp bow.

• Standard atmosphere - the conditioning and testing atmosphere required by EN 4415 before and during the measurement.

Who uses SIST EN 4429:2010?

SIST EN 4429:2010 is used by laboratories testing aerospace textiles, by quality managers checking fabric conformity, and by suppliers and buyers who need a common method for acceptance or verification. It is relevant wherever narrow woven fabrics are specified for aerospace non-metallic materials and the straightness of the fabric edge matters to product performance or fit.

What changed in SIST EN 4429:2010 from the previous edition?

SIST EN 4429:2010 is the Slovenian standard identical to EN 4429:2006.

Which standards are used with SIST EN 4429:2010?

• EN 4385 - gives the general organization of aerospace non-metallic materials standards and explains how this document fits into that system.

• EN 4415 - provides the technical specification for narrow woven fabrics and the standard atmosphere used for conditioning and testing.

What does the SIST EN 4429:2010 document contain?

The document contains the test method from scope through report requirements, plus a short definition section and a safety note. It includes Figure 1 for the test plate arrangement and Figure 2 for the measurement setup, which help users reproduce the geometry of the test. Clause 11 gives the designation format, and Clause 12 lists the information that must appear in the test report. Together, these parts make the standard usable for routine laboratory testing, product qualification, and traceable quality records.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Textilien - Prüfung von Gewebebändern - Bestimmung der KonizitätSérie aérospatiale - Textiles - Essais des tissus étroits - Détermination du cintrage sens chaîneAerospace series - Textiles - Testing of narrow woven fabrics - Determination of warp bow49.025.60TekstilijeTextilesICS:Ta slovenski standard je istoveten z:EN 4429:2006SIST EN 4429:2010en,de01-marec-2010SIST EN 4429:2010SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4429August 2006ICS 49.025.60 English VersionAerospace series - Textiles - Testing of narrow woven fabrics -Determination of warp bowSérie aérospatiale - Textiles - Essais des tissus étroits -Détermination du cintrage sens chaîneLuft- und Raumfahrt - Textilien - Prüfung von SchmalGeweben - Bestimmung der KoniziteätThis European Standard was approved by CEN on 24 June 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4429:2006: ESIST EN 4429:2010
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