EN 3789:2001
(Main)Aerospace series - Pipe coupling 8°30' - Protective plugs with external threads
Aerospace series - Pipe coupling 8°30' - Protective plugs with external threads
This standard specifies the characteristics for plastic plugs for pipe couplings 8°30' used to protect the couplings during transportation, storage and removal of units in system, for aerospace applications. The plugs incorporate an external thread for screwing on to the threaded portion of a pipe coupling.
Luft- und Raumfahrt - Rohrverschraubung 8°30' - Schutzstopfen mit Außengewinde
Série aérospatiale - Système de raccordement 8°30' - Bouchons de protection à filetage exterieur
Aerospace series - Pipe coupling 8-30' - Protective plugs with external threads
General Information
Relations
Overview
EN 3789:2001 is a European standard developed by CEN that specifies the characteristics of plastic protective plugs with external threads used in aerospace pipe couplings at an angle of 8°30'. These plugs are designed specifically for aerospace applications to protect pipe couplings during transportation, storage, and removal of system units. The standard ensures that plugs fit securely onto the threaded portion of pipe couplings, maintaining system integrity and cleanliness in critical aerospace environments.
This aerospace-specification standard guarantees dimensional accuracy and material quality for reliable use in fluid systems, contributing to enhanced safety and performance of aerospace piping assemblies.
Key Topics
Scope and Purpose
Defines plastic protective plugs for pipe couplings 8°30' used in aerospace fluid systems to prevent contamination and damage during handling and storage.Technical Characteristics
- Plugs have an external thread suitable for screwing onto pipe coupling threads
- Constructed of high-density polyethylene (HDPE) for durability and contamination resistance
- Color specified as white for easy identification
- Designed to withstand 0.1 MPa overpressure for 8 hours without leakage
- Manufactured free of visible contamination and burrs, ensuring smooth threaded and end surfaces
Dimensions and Tolerances
- Detailed dimensional requirements provided to fit standard pipe coupling sizes from MJ10 to MJ39 threads
- General tolerances apply according to ISO 2768-1 for linear and angular dimensions
- Standardized marking formats specify plug identification and traceability
Material and Marking
- Polyethylene HD selected for chemical resistance and mechanical properties
- Marking follows EN 2424 standards, including product identity and standard code, facilitating quality control and compliance traceability
Applications
EN 3789:2001 protective plugs are critical components in aerospace hydraulic and fluid systems for:
Protection during Transportation and Storage
Prevents ingress of dirt, moisture, and damage to pipe couplings while systems or components are transported or stored before installation.System Maintenance and Assembly
Used during removal or replacement of piping units to safeguard coupling threads from contamination and mechanical impact, ensuring system integrity.Hydraulic and Fluid Systems Integrity
Supports leak prevention and contamination control for hydraulic lines, fuel systems, and other fluid transfer applications in aerospace vehicles.Standardized Part Interchangeability
Ensures compatibility across aerospace manufacturers and suppliers through adherence to stringent dimensional and material requirements.
Related Standards
- ISO 2768-1 – General tolerances for linear and angular dimensions without individual tolerance indications, referenced for dimension consistency.
- ISO 5855-3 – Aerospace series MJ threads standard defining limit dimensions for fluid system fittings, directly relating to plug thread specifications.
- EN 2424 – Aerospace product marking guidelines, referenced for plug marking and identification compliance.
By complying with EN 3789:2001, aerospace manufacturers and maintenance professionals ensure that protective plugs provide reliable sealing and protection to pipe couplings, reducing contamination risk and prolonging component life in critical aerospace fluid systems. This standard facilitates uniformity, safety, and quality assurance across the aerospace supply chain.
Frequently Asked Questions
EN 3789:2001 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Pipe coupling 8°30' - Protective plugs with external threads". This standard covers: This standard specifies the characteristics for plastic plugs for pipe couplings 8°30' used to protect the couplings during transportation, storage and removal of units in system, for aerospace applications. The plugs incorporate an external thread for screwing on to the threaded portion of a pipe coupling.
This standard specifies the characteristics for plastic plugs for pipe couplings 8°30' used to protect the couplings during transportation, storage and removal of units in system, for aerospace applications. The plugs incorporate an external thread for screwing on to the threaded portion of a pipe coupling.
EN 3789:2001 is classified under the following ICS (International Classification for Standards) categories: 49.080 - Aerospace fluid systems and components. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3789:2001 has the following relationships with other standards: It is inter standard links to EN 3789:2001/AC:2003. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 3789:2001 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.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Pipe coupling 8-30' - Protective plugs with external threadsLuft- und Raumfahrt - Rohrverschraubung 8°30' - Schutzstopfen mit AußengewindeSérie aérospatiale - Systeme de raccordement 8°30' - Bouchons de protection a filetage exterieurAerospace series - Pipe coupling 8°30' - Protective plugs with external threads49.080Aerospace fluid systems and componentsICS:Ta slovenski standard je istoveten z:EN 3789:2001SIST EN 3789:2002en01-januar-2002SIST EN 3789:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3789September 2001ICS 49.080English versionAerospace series - Pipe coupling 8°30' - Protective plugs withexternal threadsThis European Standard was approved by CEN on 29 December 2000.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3789:2001 ESIST EN 3789:2002
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