LAWRENCE LIVERMORE NATIONAL LABORATORY Engineering ...

LAWRENCE LIVERMORE N AT I O N A L LABORATORY

Engineering Drafting Manual, Volume 2

March 2008

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Engineering Drafting Manual, Volume 2

This document was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor Lawrence Livermore National Security, LLC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or Lawrence Livermore National Security, LLC. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or Lawrence Livermore National Security, LLC, and shall not be used for advertising or product endorsement purposes.

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

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Revision Date: March 2008

Engineering Drafting Manual, Volume 2

Engineering Drafting Manual, Volume 2

Prepared By: Engineering Drafting Committee

O. J. Alford, S. L. Edson, P. G. Gardner, A. A. Gonzales, M. R. McDaniel, S. T. Mills, S. G. Oto, and D. A. Ryder

__________________________________ Michael R. McDaniel Chairman

Approved By:

__________________________________

Tom Anklam Chief Mechanical Engineer

__________________________________

Dennis O'Brien Chief Electronics Engineer

Revision Date: March 2008

Engineering Drafting Manual, Volume 2 Contents

Contents

Section

Introduction 1. Specifications and Standards 2. Drawing/Data Elements 3. Drafting Practices 4. Types of Engineering Drawings 5. Dimensioning and Tolerancing 6. Drawing Layout 7. Drawing and Part Numbers 8. Drawing Titles 9. Drawing Notes 10. Parts List Preparation 11. Identification Marking 12. Threads and Fasteners 13. Surface Finish 14. Welding Data 15. Coatings 16. Casting Data 17. Forging Data 18. Facilities 19. Tooling 20. Packaging Drawings 21. Sheet Metal 22. Electrical and Electronics Drawings 23. Drawing Change Procedure 24. Abbreviations 25. Definitions 26. Reference Data 27. Memos

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Revision Date

March 2008 March 2008 Not Available March 2008 March 2008 March 2008 March 2008 March 2008 March 2008 March 2008 March 2008 Not Available March 2008 March 2008 March 2008 Not Available Not Available Not Available Not Available March 2008 Not Available March 2008 March 2008 March 2008 March 2008 March 2008 March 2008 Not Available

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Engineering Drafting Manual, Volume 2 Introduction

Introduction

The Engineering Drafting Manual, Volume 2 contains guidance to aid Engineering personnel in preparing and producing engineering drawings. This guidance is based on specific Lawrence Livermore National Laboratory (LLNL) standards, specifications, and procedures, as well as industry and military standards and specifications. Engineering's objective is to produce drawings that contain all the information required for a single interpretation of the originator's intent by all users of the drawing. The Engineering Directorate, as a decentralized organization, recognizes the independence of the divisions, projects, and programs, relative to engineering and fabrication matters. However, Engineering personnel are often dependent on one another for engineering information and support. Drawings are exchanged and Engineering personnel are often transferred between divisions. These considerations underscore the desirability of having uniform drafting practices.

The guidance set forth in this manual is a resource for reconciling differing viewpoints for engineering drafting procedures. Sections highlight controversial areas and provide recommended solutions, all with the goal of having uniform drawing practices and manufacturing processes throughout the Engineering Directorate. In the event policies conflict, the following order of precedence for requirements should apply: 1. Engineering Policy 5.4, "Drafting" 2. Engineering Drafting Manual, Volume 1 3. Engineering Drafting Manual, Volume 2

Engineering Policy 1, "Policy Applicability and Authorizations Required for Exceptions or Deviations," defines the authorizations required for exceptions or deviations to these drafting requirements.

SI (metric) units are used throughout the text and illustrations in this manual in accordance with ASME Y14.5M?1994. Customary English units in this manual are noted. SI units are the commonly used units of measure for engineering drawings. However, the units of measure specified on a drawing should be uniform across all drawings within an assembly package, as defined by the owning design organization and the contractual requirements of their customer deliverables.

The drawing examples in this manual are complete only to the extent necessary to illustrate the requirements of the accompanying text and illustrations. Graphics will be updated as funding allows.

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Engineering Drafting Manual, Volume 2 Introduction

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Engineering Drafting Manual, Volume 2 Sec. 1: Specifications and Standards

Section 1. Specifications and Standards

Section Revision History

Release Date Author

Revision

March 2008 EP2 Drafting Revision AA: Initial release of Engineering Drafting Manual, Volume 2. Committee

Contents

1.1 Purpose................................................................................................................................2 1.2 Specification and Standards Implementation .................................................................2 1.3 Reference Documents ........................................................................................................2

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Engineering Drafting Manual, Volume 2 Sec. 1: Specifications and Standards

1.1 Purpose

This section lists readily available past and present specifications and standards used for engineering drawings prepared for the Engineering Directorate. Inclusion on the lists is no indication of current status, i.e. active, inactive, or superseded.

1.2 Specification and Standards Implementation

Engineering requires that the revision letter and/or date of release of specifications and standards shall be included in the notes called out on the face of drawings.

1.3 Reference Documents

? Global Engineering, Drawing Requirements Manual (latest edition) ? Information Handling Services (IHS)

IHS is a provider of technical content and information solutions for standards, regulations, parts data, design guides, and other technical information, and is available to Engineering and other LLNL employees. Access IHS from the LLNL Library web page (choose Specs & Standards (IHS)):



Tables 1-1 and 1-2 list specifications available from IHS.

Spec. No.

ANSI Y14.17-1966 ANSI Y14.7.1-1971 ANSI Y14.7.2-1978 ASME B46.1?2002 ASME SI-1?1982 ASME Y14.100-2003 ASME Y14.1-1995 ASME Y14.1M-1995 ASME Y14.2M-1992 ASME Y14.3M-1994 ASME Y14.4M-1989 ASME Y14.5M-1994 ASME Y14.5.1M-1992

Table 1-1. ME specifications available from IHS

Spec. Name Use of the International System of Units (SI): The Modern Metric System Gear Drawing Standards ? Part 1: for Spur, Helical, Double Helical and Rack Gear and Spline Drawing Standards Part 2: Bevel and Hypoid Gears Surface Texture (Surface Roughness, Waviness, and Lay) ASME Orientation and Guide for use of SI-1 (Metric) Units - Ninth Edition Engineering Drawing Practices Decimal Inch Drawing Sheet Size and Format Metric Drawing Sheet Size and Format Line Conventions and Lettering Multiview and Sectional View Drawings Pictorial Drawing Dimensioning and Tolerancing Mathematical Definition of Dimensioning and Tolerancing Principles

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