ISO 102-1990 PDF

Full title and description

ISO 102:1990 — Aircraft — Gravity filling orifices. Specifies minimum internal diameters for gravity-filling orifices used for aircraft fuels, lubricants and other fluids; includes sizing guidance for associated replenishment nozzles to ensure safe, compatible and leak-minimizing fluid transfer during ground servicing operations.

Abstract

This International Standard defines the minimum internal diameters of filling orifices for gravity refuelling/refilling of aircraft systems (fuel, lubricants and other fluids) and gives related dimensional guidance for replenishment nozzles where relevant. Its purpose is to promote interchangeability, safe filling practice, and to reduce the risk of spillage or cross-contamination in aircraft ground servicing.

General information

• Status: Published; confirmed (ISO catalogue life‑cycle shows the 1990 edition as published and subsequently confirmed in review cycles).
• Publication date: 1990 (ISO catalogue entry lists July 1990; the document front matter is dated 19 June 1990 in reprints/metadata).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.080 (aerospace fluid systems and components); 49.100 (ground service and maintenance equipment).
• Edition / version: Edition 2 — ISO 102:1990 (this edition cancels and replaces ISO 102:1976).
• Number of pages: ISO catalogue lists 1 page for the catalogue record; reproduced copies and vendor listings commonly show a short pamphlet of 3–4 pages depending on formatting.

Scope

ISO 102:1990 applies to gravity filling orifices used on aircraft and to the external dimensions of replenishment nozzles where these are relevant to gravity refuelling of fuels (e.g., AVGAS and turbine fuels) and other fluids (lubricants, hydraulic fluids, drinking water, de‑icing fluids, etc.). The standard establishes minimum internal diameters to ensure adequate flow and compatibility while noting that fitted filters must not reduce the minimum orifice diameter required.

Key topics and requirements

• Minimum internal diameters for gravity filling orifices categorized by fluid type (fuel, lubricants, hydraulic fluids, potable water, de‑icing fluids, etc.).
• Dimensional guidance for external diameters of replenishment nozzles (notably for AVGAS and turbine fuel fittings) to ensure correct fit and reduce leakage.
• Recommendation that any in‑line filters or fittings must not reduce the minimum internal diameter specified.
• Objective of promoting interchangeability of ground servicing equipment and safe refuelling/refilling practices.

Typical use and users

Primary users include aircraft designers and systems engineers (to specify orifice geometry on new designs), ground support equipment manufacturers (refuelling and replenishment nozzles), maintenance and servicing organizations (for matching equipment and procedures), and regulatory or compliance personnel who reference dimensional standards for safe servicing operations. Operators and ground handling teams consult the standard to verify equipment compatibility.

Related standards

ISO 102:1990 replaces ISO 102:1976. Related ISO standards and technical documents cover other ground service equipment and fluid handling practices (examples in the ISO/TC 20 family include standards for ground service connections, de‑icing fluids and catering/ground‑support equipment). Users should consult the ISO catalogue and ISO/TC 20/SC 9 outputs for the most relevant companion documents.

Keywords

gravity filling, orifice diameter, aircraft fuelling, refuelling nozzle, replenishment nozzle, fuel system, lubricants, ground support equipment, ISO 102, aviation servicing

FAQ

Q: What is this standard?

A: ISO 102:1990 is an International Standard titled "Aircraft — Gravity filling orifices" that specifies minimum internal diameters for gravity‑filling orifices and related nozzle dimensional guidance for aircraft servicing.

Q: What does it cover?

A: It covers dimensional requirements (minimum internal diameters) for gravity filling orifices used for fuels and other aircraft fluids, and gives guidance on the external diameters of replenishment nozzles where applicable; it also notes considerations such as not reducing orifice size by fitted filters.

Q: Who typically uses it?

A: Aircraft designers, manufacturers of ground servicing/refuelling equipment, maintenance and ground‑handling organizations, and regulatory/compliance personnel who ensure equipment compatibility and safe servicing procedures.

Q: Is it current or superseded?

A: ISO 102:1990 is the second edition (1990) that replaced ISO 102:1976. According to the ISO catalogue the 1990 edition is published and has been confirmed in subsequent review cycles (most recently confirmed in ISO life‑cycle entries). It is not shown as formally superseded in the ISO catalogue as of the latest catalogue status.

Q: Is it part of a series?

A: ISO 102 is a single‑subject International Standard (edition 2, 1990) rather than a multipart series. It sits within the broader ISO/TC 20 work program related to aircraft and ground support equipment; users should consult other related ISO/TC 20 standards for complementary requirements.

Q: What are the key keywords?

A: gravity filling, orifice diameter, refuelling nozzle, aircraft servicing, ground support equipment, fuel handling, ISO 102.