ISO 22436-2018 PDF

Full title and description

ISO 22436:2018 — Aerospace series — Pipe coupling 8°30' — Thread end — Geometric configuration. This International Standard specifies the geometric characteristics and designation of the thread end for 8°30′ pipe couplings used in aerospace fluid systems (nominal pressure up to 28 000 kPa).

Abstract

Defines the required geometric configuration and characteristics of the thread end for 8°30′ pipe couplings intended for aerospace hydraulic/pneumatic systems, to ensure interchangeability and pressure capability up to 28 000 kPa. Intended as a product/geometry specification within the ISO aerospace coupling series.

General information

• Status: Published (confirmed in review — remains current).
• Publication date: 14 March 2018 (Edition 1, 2018).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.080 — Aerospace fluid systems and components.
• Edition / version: Edition 1 (2018).
• Number of pages: 8 pages.

Source: ISO bibliographic record and national standards catalogues.

Scope

Specifies the characteristics of the thread end for pipe couplings with an 8°30′ taper used in aerospace applications, for nominal pressures up to 28 000 kPa. The standard covers geometric configuration and designation necessary to ensure fit and function in aerospace fluid systems; it is focused on the thread end geometry rather than manufacturing processes or material specifications.

Key topics and requirements

• Definition of the geometric parameters for the thread end of 8°30′ pipe couplings.
• Tolerances and dimensional limits relevant to mating and interchangeability.
• Designation and marking conventions for thread-end variants where applicable.
• Applicability statement for nominal pressure (up to 28 000 kPa) and aerospace fluid-system environments.
• Normative references to related parts of the 8°30′ coupling series (for complementary seal ends, nuts, etc.).

(Derived from ISO abstract and scope information.)

Typical use and users

Used by aerospace design and systems engineers, hydraulic/pneumatic assembly designers, manufacturers of fittings and couplings, quality and standards teams, procurement specialists specifying compatible components, and certification/test laboratories. It is consulted when specifying or verifying mating interfaces for aerospace fluid line assemblies where 8°30′ couplings are used.

Related standards

Part of a set of ISO documents for 8°30′ pipe couplings. Closely related items include ISO 22433:2018 (dynamic beam seal end for elbows, tees and crosses) and ISO 22437:2018 (nut for welded ferrule in titanium alloy — note: some neighboring documents in the series may have different lifecycle statuses). Historic or regional equivalents/related documents (for example older EN standards addressing 8°30′ couplings) may also be referenced when working across suppliers.

Keywords

pipe coupling, 8°30', thread end, geometric configuration, aerospace fluid systems, hydraulic fittings, interchangeability, nominal pressure 28 000 kPa, ISO/TC 20/SC 10.

FAQ

Q: What is this standard?

A: ISO 22436:2018 is an ISO International Standard that specifies the geometric configuration of the thread end for 8°30′ pipe couplings used in aerospace fluid systems.

Q: What does it cover?

A: It covers the dimensional characteristics, tolerances and designation information for the thread end of 8°30′ pipe couplings intended for aerospace applications (nominal pressure up to 28 000 kPa). It is a geometry/product specification — not a material or manufacturing process standard.

Q: Who typically uses it?

A: Aerospace engineers, coupling and hydraulic-system designers, manufacturers of fittings and assemblies, procurement/specification writers, quality control and testing organizations, and standards/ certification bodies.

Q: Is it current or superseded?

A: The 2018 edition (Edition 1) is published and was reviewed/confirmed in ISO’s 5‑year review cycle (confirmation recorded in 2023), so the 2018 edition remains the current, confirmed version. Users should check ISO or their national body for any subsequent amendments or replacements.

Q: Is it part of a series?

A: Yes — ISO 22436 is one document in a family of ISO standards addressing 8°30′ pipe couplings and associated seal ends and components (examples: ISO 22433, ISO 22437 and other related parts). These companion standards cover other geometric features, seal ends, nuts and related items.

Q: What are the key keywords?

A: pipe coupling, 8°30', thread end, geometric configuration, aerospace fluid systems, hydraulic fittings, interchangeability, 28 000 kPa.