ISO 8575-2016 pdf free.Aerospace一Fluid systems一Hydraulic system tubing.
This document provides information relating to the sizes and materials of tubing for use in aerospace hydraulic pressure and return and suction lines. For pressure lines, the requirements apply to the pressure and temperature ranges covered by pressure class D. E and I and temperature type 13 and type 20 as specified in Iso 6771.
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.
ISO 8574, Aerospace — Hydraulic system tubing — Qualification tests for bent tubes ISO 6771, Aerospace — Fluid systems and components — Pressure and temperature classifications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.orgj..
• ISO Online browsing platform: available at http://www.iso.org/obp/
3.1 inch — tubing
tubing diameters and wall thickness in fractional inch increments and based on industry standards
3.2 metric tubing
tubing diameters and wall thickness in SI-metric units
Note 1 to entry: Metric tubing is in compliance with ISO 2964.
4 Requirements
4.1 General
The pipe dimensions quoted are in common use for the stated materials in the different pressure and temperature classes. Inclusion of a dimension under a pressure and temperature class in this document does not constitute a guarantee of fitness for purpose in all circumstance. Aircraft Systems designers should verify each tube assembly application with the appropriate stress authority.
4.2 Pressure lines
4.2.1 Tubing material
Material for tubing used in hydraulic system pressure line shall be in accordance with Table], and shall conform to the appropriate physical properties specified in Table 1.
4.2.2 Tube sizes
The outside diameters, wall thicknesses and materials of tubing used in the manufacture of tube assemblies shall conform, where applicable, to the relevant requirements given in Table 2 or Table 3 for inch tubing and Table 4 or Table 5 for metric tubing.
Where no wall thickness is shown in the tables for a particular combination of tube outside diameter and material and it is desired to use that combination, a suitable wall thickness shall be selected and verified by testing in accordance with Iso 8574.
4.2.3 Qualification
Tubing having outside diameters, wall thicknesses and materials as specified in Table 2 and Table 3
shall have been verified by testing in accordance with the requirements of ISO 8574.
4.3 Suction and return lines
4.3.1 Tubing Material
Materials for tubing used in hydraulic system suction and return lines may be as given in Table 1 and verified in accordance with ISO 8574 or at the discretion of the aircraft designer.
4.3.2 Tube sizes
Unless otherwise specified, the outside diameters for inch tubing used in suction and return lines shall be selected from those specified in Tabk2 or 1able3 for inch tubing, and from TableA or Tab1e5 for metric tubing.
The corresponding wall thicknesses shall be selected and verified in accordance with Table 2 to Table 5 or at the discretion of the aircraft designer.ISO 8575 pdf download.
Tags: Aerospace
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