EN 4429:2006
(Main)Aerospace series - Textiles - Testing of narrow woven fabrics - Determination of warp bow
Aerospace series - Textiles - Testing of narrow woven fabrics - Determination of warp bow
This standard defines the general requirements for the determination of warp bow of narrow woven fabrics by measurement testing.
Luft- und Raumfahrt - Textilien - Prüfung von Gewebebändern - Bestimmung der Konizität
Diese Norm legt die allgemeinen Anforderungen an die Bestimmung der Konizität von Gewebebändern durch Messversuche fest.
Série aérospatiale - Textiles - Essais des tissus étroits - Détermination du cintrage sens chaîne
Aeronavtika - Tekstilije - Preskušanje ozkih tkanin - Določitev loka zvijanja
Ta standard določa splošne zahteve za določitev loka zvijanja ozkih tkanin s preskusom merjenja.
General Information
Overview
EN 4429:2006 is an aerospace series standard published by CEN that defines the general requirements and measurement method for determining warp bow in narrow woven fabrics. The standard forms part of the EN non‑metallic materials family (level 2 as described in EN 4385) and is intended for use in laboratory and production quality‑control environments for aerospace textiles.
The procedure measures the in‑plane deformation (deflexion) of a specimen's warp direction relative to the rectilinear, parallel edges it should have. Results are reported as the arithmetic mean of three measurements expressed in millimetres.
Key Topics
- Principle: Measurement testing of warp bow on a conditioned specimen laid flat on a test plate.
- Specimens: Three test pieces are cut from the fabric (document references a length of approximately 1 200 mm) and conditioned faced flat for at least 24 h as per EN 4415.
- Resources and apparatus:
- Test plate with a marked longitudinal axis (standard specifies appropriate plate dimensions).
- A ruler with a minimum length of 1 m and 1 mm accuracy.
- A set square of minimum dimensions 100 × 150 mm with a millimetre scale and 1 mm accuracy.
- Test procedure (high level):
- Condition specimens in a standard atmosphere according to EN 4415 and maintain that atmosphere until testing.
- Lay each specimen flat, approximately along the longitudinal axis of the test plate, tapping it if needed without tension.
- Wait at least 1 minute, then align the ruler so its 0 mm and 1 000 mm graduations coincide with the specimen's inside border.
- Place the set square and measure the maximum distance (in mm) between the specimen's inside edge and the ruler.
- Repeat for all three specimens and calculate the arithmetic mean.
- Expression of results: Individual values and the arithmetic mean in millimetres.
- Measurement uncertainties: Precision is not known due to lack of inter‑laboratory data as stated in the standard.
Applications
EN 4429:2006 is applicable where control of fabric straightness and flatness in the warp direction is critical, especially in aerospace textile manufacturing, incoming inspection, and specification verification. Benefits include:
- Consistent acceptance criteria for narrow woven fabrics used in aerospace components.
- Repeatable measurement workflow for quality control and supplier verification.
- Traceable reporting elements to support conformity and production records.
Practical users include textile test laboratories, aerospace material procurement and QA teams, and fabric manufacturers supplying to aerospace specifications.
Related Standards
- EN 4415 - conditioning and technical specification for narrow woven fabrics (referenced for atmosphere and conditioning requirements).
- EN 4385 - organisation of the non‑metallic materials standard series and links between types of standards.
Reporting and Traceability
The standard requires the test report to include the test method reference, test conditions and equipment, specimen identification and traceability, individual measurements and arithmetic mean, tester identity, any incidents or deviations, and the test date. This supports robust documentation for aerospace quality systems.
Keywords: EN 4429:2006, warp bow, narrow woven fabrics, aerospace textiles, measurement testing, fabric flatness, quality control.
Frequently Asked Questions
EN 4429:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Textiles - Testing of narrow woven fabrics - Determination of warp bow". This standard covers: This standard defines the general requirements for the determination of warp bow of narrow woven fabrics by measurement testing.
This standard defines the general requirements for the determination of warp bow of narrow woven fabrics by measurement testing.
EN 4429:2006 is classified under the following ICS (International Classification for Standards) categories: 49.025.60 - Textiles. The ICS classification helps identify the subject area and facilitates finding related standards.
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Standards Content (Sample)
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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