ISO 22438-2018 PDF

Full title and description

ISO 22438:2018 — Aerospace series — Pipe coupling 8°30' in titanium alloy — Thrust wires. This standard specifies required characteristics of thrust wires used to attach thrust wire nuts onto tees and elbows for 8°30' pipe couplings in aerospace applications.

Abstract

ISO 22438:2018 defines the configuration, dimensions, material, surface treatment and marking and designation requirements for thrust wires (joncs) intended for use with thrust wire nuts on titanium-alloy pipe couplings with an 8°30' angle in aerospace fluid systems. The document is concise (3 pages) and focused on component characteristics for aerospace service conditions.

General information

• Status: Withdrawn.
• Publication date: March 2018 (first edition).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.080 — Aerospace fluid systems and components.
• Edition / version: Edition 1 (2018).
• Number of pages: 3.

Scope

Specifies the required characteristics of thrust wires for attaching thrust wire nuts onto tees and elbows for pipe couplings with an 8°30' angle in titanium alloy, intended for aerospace applications and compatible with aerospace-fluid-system performance and environmental requirements.

Key topics and requirements

• Configuration, dimensions and mass tolerances for thrust wires.
• Surface roughness and surface-treatment requirements.
• Material specification (titanium-alloy related requirements) and any applicable heat-treatment or finishing notes.
• Designation, marking and identification of thrust wires for traceability.
• Acceptance criteria consistent with aerospace coupling performance (nominal pressure and temperature ranges addressed via related coupling standards).

Typical use and users

Used by aerospace component designers, manufacturing and supply-chain organisations, quality and procurement teams specifying or procuring thrust wire hardware, and certification/airworthiness authorities when verifying compliance of coupling components within aircraft fluid systems. The standard is narrowly focused on component characteristics for aerospace pipe couplings.

Related standards

Closely related to the corresponding European aerospace coupling standards (for example EN 3264 and other EN/ASD‑STAN/BS standards covering pipe couplings, tees and elbows and thrust wire nuts) and to other ISO/Aerospace series documents for pipe couplings and fittings. These documents together address full coupling assemblies, qualification and material treatments.

Keywords

thrust wires; thrust wire nuts; pipe coupling 8°30'; titanium alloy; aerospace series; ISO 22438; aerospace fluid systems; coupling components.

FAQ

Q: What is this standard?

A: ISO 22438:2018 is an ISO aerospace-series standard that specifies the characteristics of thrust wires used with thrust wire nuts on titanium-alloy pipe couplings having an 8°30' angle.

Q: What does it cover?

A: It covers configuration, dimensions, surface condition (roughness and treatment), material considerations, designation and marking of thrust wires for the specified coupling type; the full coupling assembly requirements are addressed in related standards.

Q: Who typically uses it?

A: Aerospace component manufacturers and suppliers, design and quality engineers, procurement specialists specifying coupling hardware, and regulatory/airworthiness reviewers for aerospace fluid systems.

Q: Is it current or superseded?

A: ISO 22438:2018 is listed as withdrawn (the ISO record and several standards distributors indicate withdrawal). Users should check the latest status with the ISO catalogue or their national standards body for whether an updated or replacement document exists.

Q: Is it part of a series?

A: Yes — it is part of the aerospace series of standards covering pipe couplings and related fittings; it is associated with technical work by ISO/TC 20/SC 10 (aerospace fluid systems and components).

Q: What are the key keywords?

A: Thrust wires, thrust wire nuts, pipe coupling 8°30', titanium alloy, aerospace, coupling components, ISO 22438.