ISO 6771-2007 PDF

Full title and description

ISO 6771:2007 — Aerospace — Fluid systems and components — Pressure and temperature classifications. This International Standard specifies pressure classes and temperature types for basic systems and component systems commonly used in aerospace fluid systems, providing a uniform classification scheme for nominal pressures and system operating temperature ranges.

Abstract

ISO 6771:2007 defines temperature types and pressure classes for aerospace fluid systems and component systems. Classes and types in the lower ranges represent systems in common use, while higher ranges cover less common or developmental systems. Nominal pressures are selected, where practical, from ISO 2944 and operating temperature ranges are given in designated tables. The standard is concise and intended to provide consistent classification across design, procurement and testing activities.

General information

• Status: Published (International Standard — confirmed).
• Publication date: August 2007 (2007-08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.080 (Hydraulic and pneumatic systems and components; aerospace fluid systems).
• Edition / version: Edition 3 (2007).
• Number of pages: 4.

Scope

This standard provides classification tables that assign temperature types and pressure classes to basic and component fluid systems used in aerospace applications. It is intended to be used when specifying system and component requirements, for documentation and for communication between manufacturers, system designers and regulatory authorities. Where practical, nominal pressure values are aligned with the values given in ISO 2944. The standard does not itself prescribe testing methods; it provides classification ranges to be referenced by other standards and specifications.

Key topics and requirements

• Definition of temperature types (operating temperature ranges) for aerospace fluid systems.
• Definition of pressure classes (nominal pressures) for systems and components.
• Classification tables for quick reference when specifying systems and components.
• Alignment of nominal pressure values with ISO 2944 where practical.
• Guidance to distinguish commonly used ranges from those intended for less common or developmental systems.

Typical use and users

Engineers and designers of aircraft and spacecraft fluid systems, component manufacturers and suppliers, systems integrators, procurement specialists, certification and airworthiness authorities, and technical authors use ISO 6771:2007 as a reference for specifying pressure and temperature classes in technical drawings, specifications and procurement documents. It is also used by test laboratories and maintenance organisations when interpreting system classifications.

Related standards

ISO 6771:2007 is related to ISO 2944 (from which many nominal pressure values are selected) and replaces earlier editions of ISO 6771 (for example ISO 6771:1987 and previous versions). It sits among other aerospace fluid-systems standards maintained by ISO/TC 20/SC 10 and may be referenced by disciplinary or manufacturer-specific specifications for hydraulic and pneumatic systems.

Keywords

aerospace; fluid systems; hydraulic; pneumatic; pressure classes; temperature types; classification; ISO 6771; ISO 2944; system specification.

FAQ

Q: What is this standard?

A: ISO 6771:2007 is an ISO International Standard that defines pressure classes and temperature types for aerospace fluid systems and their components, providing a common classification scheme for industry use.

Q: What does it cover?

A: It covers classification tables for operating temperature ranges (temperature types) and nominal pressures (pressure classes) for basic systems and component systems used in aerospace fluid applications. It does not specify test methods but provides classification values used in specifications and related standards.

Q: Who typically uses it?

A: Aerospace systems designers, component manufacturers and suppliers, procurement and quality personnel, test laboratories, maintenance organizations, and certification authorities use the standard to ensure a consistent understanding of pressure and temperature classifications.

Q: Is it current or superseded?

A: ISO 6771:2007 is the published (third) edition. The 1987 edition was withdrawn and superseded by the 2007 edition; the 2007 version has been subject to periodic review and has been confirmed as the current version through ISO's review process.

Q: Is it part of a series?

A: It is part of the body of ISO standards for aerospace fluid systems maintained by ISO/TC 20/SC 10. It is commonly used alongside other standards (for example ISO 2944) that specify related parameters and nominal values.

Q: What are the key keywords?

A: Pressure classes; temperature types; aerospace fluid systems; hydraulic systems; pneumatic systems; classification; nominal pressure; operating temperature ranges; ISO 6771.