ISO 2435-1973 rus PDF

Full title and description

ISO 2435:1973 — Nitrogen for use in aircraft. This International Standard specifies the required quality, purity and contamination limits for compressed nitrogen intended for aircraft ground service and system charging; it also gives pressure and supply characteristics necessary to charge aircraft systems to specified service pressures.

Abstract

Short (one-page) technical standard defining minimum purity (98.5 % by volume) and maximum allowable oil vapour/particulate contamination for nitrogen used in aircraft ground servicing, together with the supply pressure needed to charge aircraft systems up to 343 bar at 20 °C. The standard explicitly excludes nitrogen for use in oxygen systems.

General information

• Status: Published / Valid (original 1973 edition).
• Publication date: December 1973 (Edition 1, approved 1 Dec 1973).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.100 — Ground service and maintenance equipment.
• Edition / version: Edition 1 (1973).
• Number of pages: 1 page (short Technical Standard).

Scope

Specifies composition, purity and contamination limits for compressed gaseous nitrogen supplied for aircraft ground servicing and system charging. It covers the supply pressure and characteristics required to ensure charging of aircraft systems (specified to permit charging up to 343 bar at 20 °C) and sets limits for oil vapour and particulate contamination (maximum 0.005 mg per dm³ at 15 °C and 1 013 mbar). It is not intended to cover nitrogen for use in oxygen systems.

Key topics and requirements

• Minimum purity requirement: 98.5 % by volume of nitrogen.
• Supply pressure characteristic: adequate to charge aircraft systems up to 343 bar at 20 °C.
• Contamination limits: maximum total of 0.005 mg of oil vapour and particulate matter per cubic decimetre (measured at 15 °C and 1 013 mbar).
• Application boundary: excludes nitrogen intended for oxygen systems and medical/respiratory uses.
• Short-form standard: concise (one page) technical specification intended for purchase/implementation by suppliers and ground-service organisations.

Typical use and users

Used by aircraft ground handling organisations, airline maintenance departments, aircraft manufacturers and design offices, compressed-gas suppliers and filling-station operators that provide nitrogen for aircraft servicing, and national/regional regulators and certification bodies responsible for ground support equipment. It is used to define acceptance and supply criteria when procuring or specifying nitrogen for aircraft charging and maintenance operations.

Related standards

Related materials include other ISO standards and national standards covering ground support and maintenance equipment, compressed-gas handling and testing methods, and aviation servicing procedures. For procurement and safety management, users typically consult ISO catalogue entries for standards under ICS 49.100 and the output of ISO/TC 20/SC 10 (aircraft ground support and servicing equipment) when aligning procedures with ISO 2435:1973.

Keywords

nitrogen; aircraft; compressed gas; purity; oil vapour; contamination limits; ground service; system charging; 343 bar; ISO 2435; 1973.

FAQ

Q: What is this standard?

A: ISO 2435:1973 is a one-page International Standard that specifies the quality and supply characteristics of compressed nitrogen intended for use in aircraft ground servicing and system charging.

Q: What does it cover?

A: It covers minimum purity (98.5 % by volume), permissible contamination by oil vapour and particulates (not more than 0.005 mg per dm³ at specified test conditions), and supply pressure sufficient to charge aircraft systems up to 343 bar at 20 °C; it does not cover nitrogen for oxygen systems.

Q: Who typically uses it?

A: Airlines, ground-service and maintenance organisations, aircraft manufacturers, gas suppliers and regulators involved in specifying, supplying or accepting nitrogen for aircraft servicing.

Q: Is it current or superseded?

A: The original ISO 2435 text dates from December 1973 (Edition 1). Users should check the ISO catalogue or national standards bodies for any later confirmations, revisions or withdrawals before relying on the standard for procurement or compliance purposes.

Q: Is it part of a series?

A: It is one of the ISO deliverables related to ground service and maintenance equipment (work within ISO/TC 20/SC 10). It is a stand-alone technical specification addressing nitrogen supply; related subject-matter appears across other ISO standards under ICS 49.100.

Q: What are the key keywords?

A: Nitrogen, aircraft, compressed gas, purity 98.5 %, oil vapour limit 0.005 mg/dm³, charging pressure 343 bar, ground service.