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Recommended Practice for the Design of Tubing Installations for Aerospace Fluid Power Systems
- Aerospace Standard
- ARP994A
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This document provides recommended practices for the design of tubing systems that are used for the transmission of liquid and gasses in fluid power systems for aerospace vehicles such as aircraft, missiles and boosters. The primary emphasis is given to recommended practices for line sizing, tube routing, supports and clamping, stress considerations and permissible defects, and provisions for flexure through the use of flexible hoses, coiled tubes, swivel joints, and expansion glands.
The sections regarding tubing materials and fitting types are included for reference, but particular recommendations are purposely avoided since their selection is dependent upon the specific requirements of each particular vehicle system and many other factors.
Fluid power systems are differentiated from the normal aircraft fuel and oil systems and the various fluid systems used for environmental control and air conditioning systems; however, the practices cited herein will in many cases be applicable to these other systems.
Rationale
The original version of ARP994 was published in 1976 and, prior to this revision, had not undergone any major revision. In order to update this document to reflect current aerospace design and manufacturing processes, it was decided to break this task into two stages as ARP994 is a large, complex and multi-disciplinary document. The two stages are:
-
a
A basic update of the document to delete obsolete/redundant information and to update references, etc.
-
b
A comprehensive technical update of the document
Revision A is the first stage of this update of ARP994.
Recommended Content
| Aerospace Standard | Flexure Testing of Hydraulic Tubing Joints and Fittings |
| Aerospace Standard | Aerospace-Solenoid Valve, Hydraulic, Three Way, Two Position, Direct Acting |
| Aerospace Standard | ALTERNATE DIMENSIONS, CENTER BODY SECTION, SHAPE FLUID FITTING, DESIGN STANDARD |
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Unnamed Dataset 3 | ||
| TABLE 1 | MAJOR PHYSICAL PROPERTIES OF AEROSPACE FLUID POWER SYSTEM TUBING | |
| Unnamed Dataset 5 | ||
| TABLE 2 | SWAGED FLARELESS SLEEVES WITH LIGHTWEIGHT UNION AND NUT | |
| Unnamed Dataset 7 | ||
| TABLE 3 | INSTALLATION TORQUE FOR BOSS FITTINGS | |
| TABLE 4 | MAXIMUM LAMINAR FLOW FOR NOMINAL TUBE SIZES | |
| Unnamed Dataset 10 | ||
| TABLE 5 | MAXIMUM LONG TERM OPERATING TEMPERATURES - HYDRAULIC SYSTEM MATERIALS | |
| TABLE 6 | HYDRAULIC LINES SUPPORT SPACINGS | |
| Unnamed Dataset 13 | ||
| TABLE 7 | INSTALLATION DIMENSION FOR TUBE END PROJECTION BEYOND SLEEVE | |
| TABLE 8 | SUMMARY OF UNSUPPORTED TUBE LENGTHS AT A NATURAL FREQUENCY OF 200 CPS | |
| TABLE 9 | MINIMUM DENT RADII | |
| TABLE 10 | PUMP SUPPLY DENT LIMITS | |
| Unnamed Dataset 18 | ||
| Unnamed Dataset 19 | ||
| TABLE 11 | IDENTIFICATION COLORS | |
| TABLE 12 | IDENTIFICATION SYSTEM COLORS | |
| TABLE 13 | LINE IDENTIFICATION MULTIPLE HYDRAULIC SYSTEMS |
Issuing Committee
A6C5 is responsible for the development of standards, processes, and practices for Commercial and Military air vehicle components related to SAE A6 Aerospace Actuation, Control, and Fluid Power Systems. The Panel provides a forum for component users and producers to exchange technical information, regulatory updates, recent technology developments, issues related to system development and in service operation and lessons learned.
Reference
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