EN 4234:2020
(Main)Aerospace series - Clamps, worm drive - Dimensions, masses
Aerospace series - Clamps, worm drive - Dimensions, masses
This document specifies the characteristics of worm drive clamps designed for use with suitable rubber
hoses to form joints in fluid system pipelines for aerospace applications.
Luft- und Raumfahrt - Schellen mit Schneckenbetrieb - Maße, Massen
Dieses Dokument legt die Eigenschaften von Schellen mit Schneckentrieb fest, die so aufgebaut sind, dass sie zusammen mit geeigneten Elastomer Schläuchen Verbindungen in Rohrleitungen von fluidischen Systemen der Luft und Raumfahrt herstellen.
Série aérospatiale - Colliers à vis tangente - Dimensions, masses
La présente norme européenne spécifie les caractéristiques des colliers à vis tangente conçus pour utilisation avec des tuyauteries en caoutchouc appropriées pour les raccordements de canalisations de systèmes de fluides pour applications aérospatiales.
Aeronavtika - Objemke s polžastim gonilom - Mere, mase
General Information
Relations
Overview
EN 4234:2020 - Aerospace series: Clamps, worm drive - Dimensions, masses is a CEN/ASD-STAN European standard that defines the dimensional, mass and basic design requirements for worm‑drive hose clamps used with rubber hoses in aerospace fluid system pipelines. Approved July 2019 and superseding EN 4234:2015, the standard ensures interchangeability, traceability and compatibility of worm drive clamps across aerospace programs.
Key topics
- Scope and intent: Specifies characteristics for worm‑drive clamps used to form joints in aerospace fluid pipelines (rubber hoses).
- Design requirements: Housing must be firmly attached to the band; inner edges must be rounded or beaded; band serration is optional. Form N uses a stamped undrilled band and round‑headed screw.
- Dimensions and masses: Detailed dimensions and permitted tolerances are provided (Figure 1, Tables 1–4). Clamp size ranges and nominal masses are listed in the standard to support parts selection and weight budgeting.
- Materials & surface treatment: Acceptable materials reference aerospace steel and stainless steel standards (EN 2465, EN 3487, EN 3488, EN 10088). Surface treatments include passivation per EN 2516 or alternatives shown in Table 5.
- Tightening torque: Maximum tightening torques are specified by clamp form: Form L: 6 Nm, Form M: 2.5 Nm, Form N: 0.8 Nm.
- Marking & designation: Marking fields, style (EN 2424, style C/F) and clamping range notation (dmin/dmax) are defined for traceability.
- Technical specification & qualification: Product technical specification per EN 3077; manufacturers must be an approved aerospace production organisation and implement a quality management system (e.g., EN 9100). Qualification procedures such as EN 9133 are referenced for standard product qualification.
Applications
EN 4234:2020 is intended for:
- Aerospace design engineers specifying hose clamp components in fluid systems.
- Manufacturers producing worm drive clamps to aerospace quality and dimensional requirements.
- Procurement and supply chain specialists ensuring part conformity and interchangeability.
- Maintenance and MRO teams performing replacements where controlled dimensions, masses and torque limits matter.
- Certification and quality assurance teams verifying supplier qualification and marking/traceability.
Use cases include hydraulic and fuel hose joints, pneumatic lines, and other fluid system connections on aircraft and aerospace platforms where consistent clamp performance, weight control and corrosion resistance are required.
Related standards
- EN 3077 - Clamps worm drive - Technical specification
- EN 2424 - Marking of aerospace products
- EN 2465, EN 3487, EN 3488, EN 10088 - Material standards (steel/stainless steel)
- EN 2516 - Passivation requirements
- EN 9100, EN 9133 - Aerospace quality and qualification procedures
Keywords: EN 4234:2020, aerospace clamps, worm drive clamps, hose clamps, dimensions, masses, tightening torque, aerospace fasteners, clamp materials, passivation, EN 3077, EN 9100.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2020
Nadomešča:
SIST EN 4234:2015
Aeronavtika - Objemke s polžastim gonilom - Mere, mase
Aerospace series - Clamps, worm drive - Dimensions, masses
Luft- und Raumfahrt - Schellen mit Schneckenbetrieb - Maße, Massen
Série aérospatiale - Colliers à vis tangente - Dimensions, masses
Ta slovenski standard je istoveten z: EN 4234:2020
ICS:
49.030.99 Drugi vezni elementi Other fasteners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 4234
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2020
EUROPÄISCHE NORM
ICS 49.030.99 Supersedes EN 4234:2015
English Version
Aerospace series - Clamps, worm drive - Dimensions,
masses
Série aérospatiale - Colliers à vis tangente - Luft- und Raumfahrt - Schellen mit Schneckenbetrieb -
Dimensions, masses Maße, Massen
This European Standard was approved by CEN on 14 July 2019.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4234:2020 E
worldwide for CEN national Members.
Contents
Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Design . 4
5 Required characteristics . 5
5.1 Configuration — Dimensions — Masses . 5
5.2 Materials and surface treatment . 7
5.3 Tightening torque . 8
6 Designation. 8
7 Marking . 8
7.1 Field 1 . 8
7.2 Field 2 . 8
8 Technical specification . 8
9 Qualification . 9
Annex A (informative) Evolution sheet . 10
Bibliography . 11
European foreword
This document (EN 4234:2020) has been prepared by the Aerospace and Defence Industries
Association of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
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 January 2021, and conflicting national standards shall
be withdrawn at the latest by January 2021.
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 4234:2015.
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, Republic of North 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.
1 Scope
This document specifies the characteristics of worm drive clamps designed for use with suitable rubber
hoses to form joints in fluid s
...
Frequently Asked Questions
EN 4234:2020 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Clamps, worm drive - Dimensions, masses". This standard covers: This document specifies the characteristics of worm drive clamps designed for use with suitable rubber hoses to form joints in fluid system pipelines for aerospace applications.
This document specifies the characteristics of worm drive clamps designed for use with suitable rubber hoses to form joints in fluid system pipelines for aerospace applications.
EN 4234:2020 is classified under the following ICS (International Classification for Standards) categories: 49.030.99 - Other fasteners. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 4234:2020 has the following relationships with other standards: It is inter standard links to EN 4234:2015. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 4234:2020 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
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