SIST EN 4555:2004
(Main)Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end - Inch series
Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end - Inch series
This standard specifies the characteristics of welded ferrules for inch series pipe couplings, 37°, in heat resisting steel, for aerospace applications.
Nominal pressure: Class D in accordance with ISO 6771
Luft- und Raumfahrt - Rohrverschraubung 37° aus hochwarmfestem Stahl - Anschweißstutzen - Inch-Reihe
Diese Norm legt die Eigenschaften von Anschweißstutzen für Rohrverschraubungen 37° der Inch-Reihe, aus hochwarmfestem Stahl für Anwendungen in der Luft- und Raumfahrt fest.
Nenndruck: Klasse D nach ISO 6771.
Série aérospatiale - Systeme de raccordement 37°, en acier résistant a chaud - Ajustages a souder - Série inch
Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end - Inch series
General Information
Overview
EN 4555:2003 - Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end - Inch series - is a CEN/AECMA European standard that specifies the characteristics of welded ferrules used with 37° pipe couplings for aerospace fluid systems. The standard covers inch-series ferrules made from heat-resisting steel, intended for high‑integrity aerospace applications. Nominal pressure is Class D in accordance with ISO 6771.
Key topics and requirements
- Scope and purpose: Defines configuration, dimensions, tolerances and masses for welded ferrules used with 37° aerospace pipe couplings (inch series).
- Material: Requires heat-resisting steel per EN 3487, with a minimum hardness HB > 140.
- Dimensional coding: Uses a two-part code indicating wall thickness (A = 0.711 mm, B = 0.889 mm) and nominal diameter expressed in 16ths of an inch (two-digit). Example designation format: FERRULE EN4555 A10.
- Configuration and drawing references: Dimensions and tolerances are given in millimetres and illustrated in the standard’s figures and tables (see Figure 1 and Table 1).
- Marking: Ferrules are to be marked according to EN 2424 (style A).
- Technical specification and performance class: Technical and test requirements are referenced to EN 4560; pressure/temperature classification follows ISO 6771 (Class D).
- Interoperability: Designation and dimensions align with related coupling and sealing-end standards to ensure interchangeability within aerospace fluid systems.
Applications and who uses it
EN 4555:2003 is intended for organisations involved in the design, manufacture, procurement and certification of aerospace fluid-system components:
- Aerospace component manufacturers producing welded ferrules and pipe couplings.
- Design and stress engineers specifying fittings for hydraulic and fuel systems.
- Quality assurance and inspection teams verifying material, dimensions and marking compliance.
- Procurement, certification and maintenance organizations ensuring parts meet aerospace series interchangeability and pressure-class requirements.
Practical uses include specifying replacement ferrules, ensuring compatibility with existing 37° coupling systems (inch series), and confirming materials and marking meet aerospace traceability and safety requirements.
Related standards
Key normative references that define complementary requirements:
- ISO 6771 - Pressure and temperature classifications (Class D)
- EN 3487 - Steel FE-PA13 material requirements
- EN 4549 - Coupling end, welded (design configuration)
- EN 4550-4 - Female sealing ends (inch series)
- EN 4560 - Technical specification for pipe couplings, 37°
- EN 2424 - Marking of aerospace products
This standard is essential for ensuring consistent, safe and interchangeable welded ferrules in aerospace 37° pipe coupling systems.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2004
Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end
- Inch series
Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end - Inch
series
Luft- und Raumfahrt - Rohrverschraubung 37° aus hochwarmfestem Stahl -
Anschweißstutzen - Inch-Reihe
Série aérospatiale - Systeme de raccordement 37°, en acier résistant a chaud -
Ajustages a souder - Série inch
Ta slovenski standard je istoveten z: EN 4555:2003
ICS:
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 4555
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2003
ICS 49.080
English version
Aerospace series - Pipe coupling 37°, in heat resisting steel -
Ferrules, welded end - Inch series
Série aérospatiale - Système de raccordement 37°, en
acier résistant à chaud - Ajustages à souder - Série inch
This European Standard was approved by CEN on 14 September 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovak Republic, Spain, Sweden, Switzerland and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4555:2003 E
worldwide for CEN national Members.
Contents
Foreword.3
1 Scope .3
2 Normative references .3
3 Required characteristics.4
3.1 Configuration – Dimensions – Tolerances – Masses.4
3.2 Material.4
4 Designation.6
5 Marking .6
6 Technical specification .6
Foreword
This document EN 4555:2003 has been prepared by the European Association of Aerospace Manufacturers
(AECMA).
After enquiries and votes carried out in ac
...
Frequently Asked Questions
SIST EN 4555:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Pipe coupling 37°, in heat resisting steel - Ferrules, welded end - Inch series". This standard covers: This standard specifies the characteristics of welded ferrules for inch series pipe couplings, 37°, in heat resisting steel, for aerospace applications. Nominal pressure: Class D in accordance with ISO 6771
This standard specifies the characteristics of welded ferrules for inch series pipe couplings, 37°, in heat resisting steel, for aerospace applications. Nominal pressure: Class D in accordance with ISO 6771
SIST EN 4555:2004 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.
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