ASME Y14.40.0-2002 PDF

Full title and description

ASME Y14.40.0-2002 — Basic Rules for the Design of Graphical Symbols for Use in the Technical Documentation of Products. This part defines the fundamental principles, presentation rules and registration numbering approach used across the ASME Y14.40 series of graphical-symbols standards, and provides the baseline rules for creating and applying graphical symbols in technical documentation and diagrams.

Abstract

This standard establishes the basic rules and conventions for designing graphical symbols used in engineering drawings, diagrams and product technical documentation. It explains design principles (clarity, scalability, distinguishability), assignment and use of registration numbers for symbols, rules for presentation and application in diagrams, and the relationship of ASME Y14.40 parts to the corresponding ISO 14617 series. The document is intended as the normative guidance upon which the individual symbol parts (Y14.40.1–Y14.40.15) build.

General information

• Status: Withdrawn (part of the Y14.40 series actions in 2004; individual parts were removed/withdrawn from the ASME catalog).
• Publication date: 2002 (approved as an ASME/Y14 document in December 2002; later ASME/ANSI actions on the Y14.40 series occurred in 2004).
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Graphical symbols and technical product documentation — ICS 01.080 (graphical symbols) and 01.110 (technical product documentation).
• Edition / version: 2002 edition (ASME Y14.40.0-2002).
• Number of pages: Not consistently published in free listings; typical part-lengths in the Y14.40 series vary (many parts are short technical documents of a few dozen pages). Estimated (standard body publications vary by part).

Scope

Specifies the basic rules for the design of graphical symbols intended for use in the technical documentation of products. The scope covers symbol construction principles, rules for ensuring legibility and interchangeability across technical drawings and diagrams, assignment and use of registration numbers for symbol identification, and guidance on how these basic rules integrate with the more detailed symbol catalogs provided in the other parts of the Y14.40 series. The standard was developed to align with the corresponding ISO graphical-symbols series (ISO 14617).

Key topics and requirements

• Design principles for graphical symbols (clarity, simplicity, distinguishability at scale).
• Rules for symbol construction and allowable graphic variations.
• Registration-number system for uniquely identifying symbols used across the series.
• Presentation rules: line weights, proportions, text association and annotation practices.
• Application rules for diagrams and cross-references to specific symbol parts (Y14.40.1–Y14.40.15).
• Conformance and harmonization guidance with ISO 14617 graphical-symbol standards.

Typical use and users

Used by mechanical designers, system and process engineers, drafters, CAD administrators, technical illustrators, documentation specialists, and standards administrators who prepare or maintain engineering drawings and diagrams. Also referenced by procurement and quality personnel when verifying that symbol usage in documentation conforms to an organization’s drawing standards or to externally required symbol sets. Government adopting activities (for example DoD adoption of related parts) and standards committees use the document as the normative basis for symbol structure and registration.

Related standards

Closely related to the ASME Y14.40 series parts (Y14.40.1 through Y14.40.15) that provide actual symbol sets and indexes; aligned with ISO 14617 (Graphical symbols for diagrams) series. Other related Y14 documents include Y14.41 (digital product definition/model-based definition), Y14.42 (digital approval systems) and Y14.100 (engineering drawing practices).

Keywords

graphical symbols, diagrams, technical documentation, symbol registration, ASME Y14.40, ISO 14617, engineering drawings, symbol design rules, CAD documentation.

FAQ

Q: What is this standard?

A: ASME Y14.40.0-2002 specifies the basic rules for designing graphical symbols used in product technical documentation and serves as the foundational part of the ASME Y14.40 series.

Q: What does it cover?

A: It covers symbol-design principles, construction rules, presentation conventions, and the registration-number approach used by the detailed symbol parts (Y14.40.1–Y14.40.15). It establishes harmonization with the ISO 14617 graphical-symbol series.

Q: Who typically uses it?

A: Mechanical and systems engineers, drafters, CAD administrators, technical illustrators, standards committees, and organizations that produce or approve engineering diagrams and drawings. Government adopting activities and procurement/quality personnel may also reference it.

Q: Is it current or superseded?

A: The Y14.40.0-2002 document and many parts of the Y14.40 series were subject to ASME/ANSI actions in 2004 and are listed among withdrawn/superseded Y14 documents (withdrawal actions recorded in mid‑2004). Users should consult current ASME catalogs and ISO 14617 (or later ASME Y14 documents) for up-to-date symbol guidance.

Q: Is it part of a series?

A: Yes — it is the introductory/basic-rules part of the ASME Y14.40 series (the individual symbol parts are numbered Y14.40.1 through Y14.40.15 and provide the actual symbol indexes and symbol definitions). The series was developed in alignment with ISO 14617.

Q: What are the key keywords?

A: Graphical symbols, symbol registration, diagrams, technical documentation, ASME Y14.40, ISO 14617, engineering drawings, symbol presentation.