SIST EN 3078:2026

• Abstract:

  This document specifies the required characteristics, inspection and test methods, quality assurance and delivery conditions, for P, Q and saddle clamps with rubber cushion, used for aerospace applications.

• Status: Published
• Public Enquiry End Date: 04-Sep-2024
• Publication Date: 21-Jul-2026
• ICS: 49.030.99 - Other fasteners
• ICS: 49.060 - Aerospace electric equipment and systems
• ICS: 49.080 - Aerospace fluid systems and components
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-Jul-2026
• Due Date: 25-Sep-2026
• Completion Date: 22-Jul-2026
• Ref Project: EN 3078:2026 - Aerospace series - P, Q and saddle clamps with rubber cushion - Technical Specification

• Refers: SIST EN ISO 21920-1:2022 - Geometrical product specifications (GPS) - Surface texture: Profile - Part 1: Indication of surface texture (ISO 21920-1:2021)
• Effective Date: 22-Jul-2026
• Refers: SIST EN 10204:2004 - Metallic products - Types of inspection documents
• Effective Date: 22-Jul-2026

Overview

SIST EN 3078:2026 - Aerospace series - P, Q and saddle clamps with rubber cushion - Technical Specification is an international standard developed by the Slovenian Institute for Standardization (SIST). This document defines the required characteristics, inspection and test methods, quality assurance, and delivery conditions for P, Q, and saddle clamps featuring a rubber cushion, which are essential fasteners in aerospace applications. These clamps are critical for securely supporting fluid pipes and cable bundles, ensuring reliability and enhanced safety in aviation and aerospace systems.

Key Topics

• Clamp Types: Addresses three main types of clamps:

  • P clamps: Metal strip formed into a “P loop” for supporting pipes or cables, retained by a single fastener.
  • Q clamps: Similar to P clamps but in a “Q loop” configuration, also retained by one fastener.
  • Saddle clamps: Composed of two metal strips, each cushioned, available in fixed and sliding types, retained by two fasteners.

• Rubber Cushioning: All clamp types are provided with rubber cushioning to minimize vibration, prevent chafing, and protect sensitive equipment.

• Material and Dimensional Specifications: References product standards and design documentation to ensure precise materials, proper dimensions, and adequate surface treatments.

• Inspection and Testing: Outlines standardized inspection and testing methodologies-including chemical analysis, hardness/tensile tests, dimensional checks, and visual examination-to assess conformity and fitness for aerospace use.

• Quality Assurance: Specifies requirements for manufacturer approval (such as certified quality management systems like EN 9100), batch sampling procedures, and acceptance criteria for defects according to ISO 2859-1.

• Packaging and Delivery: Describes protective packaging, marking requirements, and documentation to prevent damage during transportation and ensure traceability.

Applications

• Aerospace Systems: P, Q, and saddle clamps with rubber cushions are widely used in aircraft and spacecraft for the secure routing and support of hydraulic lines, fluid pipes, and electrical bundles.

• Aerospace Fluid Systems: These clamps contribute to system reliability, reducing vibration and potential fluid line damages in complex fluid or hydraulic subsystems.

• Cable Management: Effective for organizing and fastening wiring harnesses, ensuring proper segregation and reducing risks of electrical failures.

• Maintenance and Repair: The standardization of clamp characteristics and inspection methods streamlines procurement, facilitates maintenance, and ensures compatibility during repairs or retrofits in aerospace components.

Related Standards

• EN 10204: Metallic products - Types of inspection documents
• EN ISO 21920-1: Geometrical product specifications (GPS) - Surface texture profile
• ISO 2859-1: Sampling procedures for inspection by attributes
• ISO 3161: Aerospace - UNJ threads requirements
• ISO 5855-2: Aerospace - MJ threads limit dimensions for bolts and nuts
• EN 9100: Quality Management Systems - Aviation, Space, and Defence requirements

Practical Value

Implementing SIST EN 3078:2026 in aerospace manufacturing and maintenance operations ensures uniform product quality, safety, and reliability. By establishing a common framework for clamp characteristics, testing protocols, and quality assurance, the standard greatly facilitates international trade, compliance, procurement, and interoperability in the aerospace sector.

Key benefits include:

• Improved safety through robust support for critical fluid and cable systems
• Enhanced reliability by minimizing vibration and wear
• Streamlined inspection and quality control processes
• Consistent documentation for supply chain traceability
• Compatibility with major international aerospace standards

Organizations in the aerospace industry should adopt SIST EN 3078:2026 to ensure their components meet the latest technical and quality requirements for P, Q, and saddle clamps with rubber cushions.

SLOVENSKI STANDARD
01-september-2026
Aeronavtika - Objemke tipa P, Q in cevne objemke z zaščitno obrobno prevleko iz
gume - Tehnična specifikacija
Aerospace series - P, Q and saddle clamps with rubber cushion - Technical Specification
Luft- und Raumfahrt - Schellen in Schlaufen- (P- und Q-Form) und Sattel-Form mit
Profilgummi - Technische Lieferbedingungen
Série aérospatiale - Colliers en « P », serrage central et « Ω » avec profiles en
élastomère - Spécification technique
Ta slovenski standard je istoveten z: EN 3078:2026
ICS:
49.030.99 Drugi vezni elementi Other fasteners
49.080 Letalski in vesoljski Aerospace fluid systems and
hidravlični sistemi in deli components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3078
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2026
EUROPÄISCHE NORM
ICS 49.060
English Version
Aerospace series - P, Q and saddle clamps with rubber
cushion - Technical Specification
Série aérospatiale - Colliers en " P ", " Q " et " O " avec Luft- und Raumfahrt - Schellen in Schlaufen- (P- und Q-
profilés en élastomère - Spécification technique Form) und Sattel-Form mit Profilgummi - Technische
Lieferbedingungen
This European Standard was approved by CEN on 20 April 2026.

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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3078:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
3.1 Clamps . 4
3.2 Quality assurance . 5
4 Required characteristics, inspection and test methods . 5
4.1 General. 5
4.2 Test conditions . 6
4.2.1 Test temperature . 6
4.2.2 Clamp attachment . 6
4.2.3 Test mandrel. 6
4.2.4 Check of dimensions . 7
5 Quality assurance . 9
5.1 Approval of manufacturer . 9
5.2 Acceptance conditions . 9
5.3 User’s quality control . 9
5.4 Rejection . 10
6 Packaging and storage . 10
6.1 General. 10
6.2 Parcel information . 10
6.3 Collective packings, for transport . 10
7 Certificate of compliance with the order . 10
Bibliography . 11

European foreword
This document (EN 3078:2026) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document 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 2027, and conflicting national standards shall
be withdrawn at the latest by January 2027.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, 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, Türkiye and the
United Kingdom.
1 Scope
This document specifies the required characteristics, inspection and test methods, quality assurance
and delivery conditions, for P, Q and saddle clamps with rubber cushion, used for aerospace
applications.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 10204, Metallic products — Types of inspection documents
EN ISO 21920-1, Geometrical product specifications (GPS) — Surface texture: Profile — Part 1: Indication
of surface texture (ISO 21920-1)
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3161, Aerospace — UNJ threads — General requirements and limit dimensions
ISO 5855-2, Aerospace — MJ threads — Part 2
...