ASME Y14.3-2012 (2018) PDF

Full title and description

ASME Y14.3:2012 (R2018) — Orthographic and Pictorial Views: Engineering Drawing and Related Documentation Practices. This standard defines requirements for creating orthographic (multiview) and pictorial views on engineering drawing graphic sheets and in models, consolidating prior Y14.3 and Y14.4 practices into a single document and establishing consistent conventions for view selection, arrangement, and representation.

Abstract

This standard establishes requirements for creating orthographic and pictorial views used on engineering drawings and in CAD models. Topics include multiview systems, selection and arrangement of orthographic views, auxiliary and sectional views, detail and exploded pictorials, saved views, conventional representation of features, and nonmandatory appendices on space geometry and space analysis for informational use.

General information

• Status: Originally published as ASME Y14.3:2012; reaffirmed (R2018). (Later technical activity shows an R2024 reaffirmation of the 2012 edition.)
• Publication date: 2012 (edition). Reaffirmation recorded in 2018.
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Engineering drawing and technical product documentation; ASME Y14 series (engineering drawing practices).
• Edition / version: ASME Y14.3-2012 (R2018).
• Number of pages: Manufacturer/publisher listings vary by format (commonly listed as ~96–100 pages depending on edition/format).

Scope

Specifies requirements for creating and presenting orthographic (multiview) and pictorial (isometric, oblique, exploded assembly) views on engineering drawing graphic sheets and in saved/constructed model views. It covers view selection and arrangement, auxiliary and section views, conventions for hidden lines, centerlines, cutting-plane indications, exploded pictorials, and guidance on when pictorial views are appropriate; nonmandatory appendices provide space geometry and space analysis material. The standard consolidates earlier Y14.3 and Y14.4 material to produce a unified reference for view representation.

Key topics and requirements

• Multiview system and rules for selecting principal orthographic views.
• Arrangement and projection methods (third-angle conventions commonly used in US practice).
• Auxiliary views for features not parallel to principal planes.
• Sectional views, cutting-plane indications, and hatching conventions.
• Saved views and practices for views stored in CAD models.
• Pictorial views (isometric, oblique, exploded assembly) and when to use them as illustrations.
• Conventional representation of features and special-case drawing practices.
• Informative appendices on space geometry and space analysis applications.

Typical use and users

Widely used by mechanical designers, drafters, CAD/CAM engineers, manufacturing engineers, technical illustrators, quality and inspection personnel, and educators. It is applied when producing or interpreting engineering drawings and model-derived views for product definition, fabrication, inspection, and assembly documentation.

Related standards

Closely associated with other ASME Y14 series standards such as Y14.1 (Drawing Sheet Size and Format), Y14.5 (Geometric Dimensioning and Tolerancing), Y14.41 (Digital Product Definition Data Practices), and Y14.100 (Engineering Product Definition). These documents collectively address drawing format, dimensioning/tolerancing, digital definition practices, and broader product-definition topics.

Keywords

orthographic views, multiview drawings, pictorial views, isometric, projection, section views, auxiliary views, CAD saved views, engineering drawing, technical documentation, ASME Y14

FAQ

Q: What is this standard?

A: ASME Y14.3 is the ASME standard that specifies how to create, present, and interpret orthographic (multiview) and pictorial views on engineering drawings and in models; the referenced edition is the 2012 edition as reaffirmed in 2018.

Q: What does it cover?

A: It covers view selection and arrangement, projection conventions (third-angle in US practice), auxiliary and section views, conventions for hidden and center lines, exploded pictorials, saved/CAD views, and includes informative appendices on space geometry and analysis.

Q: Who typically uses it?

A: Mechanical designers, drafters, CAD engineers, manufacturing and quality personnel, technical illustrators, inspectors, and educators who prepare or interpret engineering drawings and model-derived views.

Q: Is it current or superseded?

A: The ASME Y14.3:2012 edition was reaffirmed in 2018 (R2018). ASME technical records show subsequent reaffirmation activity for the 2012 edition in 2024 (listed as ASME Y14.3:2012 (R2024)), so the 2012(R2018) variant has been succeeded by later reaffirmation activity of the same edition. Check ASME's product records for the most current status for procurement or compliance purposes.

Q: Is it part of a series?

A: Yes — it is part of ASME's Y14 family of standards covering engineering drawing and related documentation practices (sheet formats, GD&T, digital product definition, etc.).

Q: What are the key keywords?

A: Orthographic, multiview, pictorial, isometric, projection, section views, auxiliary views, saved views, technical drawing, ASME Y14.