ASME Y14.100:2017 pdf download

ASME Y14.100:2017 pdf download.Engineering Drawing Practices
1 GENERAL
1.1 Scope This Standard establishes the essential requirements and reference documents applicable to the preparation and revision of manual or computer-generated engineering drawings and associated lists, unless tailored by a specialty standard. It is essential that this Standard be used in close conjunction with ASME Y14.24, ASME Y14.34, ASME Y14.35, and ASME Y14.41. 1.2 Application Application of this Standard may necessitate tailoring to exclude unnecessary requirements (see para 3.75). A tailoring guide, Nonmandatory Appendix A, has been included for that purpose. 1.3 ASME Y14 Series Conventions The conventions in paras. 1.3.1 through 1.3.10 are used in this and other ASME Y14 standards. 1.3.1 Mandatory, Nonmandatory, Guidance, and Optional Words (a) The word “shall” establishes a requirement. (b) The word “will” establishes a declaration of purpose on the part of the design activity. (c) The word “should” establishes a recommended practice. (d) The word “may” establishes an allowed practice. (e) The word(s) “typical,” “example,” “for reference,” or the Latin abbreviation “e.g.” indicate(s) suggestions given for guidance only. (f) The word “or” used in conjunction with a requirement or a recommended practice indicates that there are two or more options for complying with the stated requirement or practice. (g) The phrase “unless otherwise specified” or “UOS” shall be used to indicate a default requirement. The phrase is used when the default is a generally applied requirement and an exception may be provided by another document or requirement.1.3.2 Cross-Reference of Standards. Cross-reference of standards in text with or without a date following the standard identity is interpreted as follows: (a) Reference to other ASME Y14 series standards in the text without a date following the standard identity indicates the issue of the standard as identified in the References section (section 2) shall be used to meet the requirement. (b) Reference to other ASME Y14 series standards in the text with a date following the standard identity indicates that only that issue of the standard shall be used to meet the requirement. 1.3.3 Invocation of Referenced Standards. The following examples define the invocation of a standard when specified in the References section (section 2) and referenced in the text of this Standard: (a) When a referenced standard is cited in the text with no limitations to a specific subject or paragraph(s) of the standard, the entire standard is invoked, e.g., “dimensioning and tolerancing shall be in accordance with ASME Y14.5” is invoking the complete standard because the subject of the standard is dimensioning and tolerancing, and no specific subject or paragraph(s) within the standard are invoked. (b) When a referenced standard is cited in the text with limitations to a specific subject or paragraph(s) of the standard, only the paragraph(s) on that subject is invoked. For example, “assign part or identifying numbers in accordance with ASME Y14.100” is invoking only the paragraph(s) on part or identifying numbers because the subject of the standard is engineering drawing practices, and part or identifying numbers is a specific subject within the standard. (c) When a referenced standard is cited in the text without an invoking statement, such as “in accordance with,” the standard is invoked for guidance only. For example, “for gaging principles, see ASME Y14.43” is only for guidance, and no portion of the standard is invoked.
1.3.4 Parentheses Following a Definition. When a definition is followed by a standard referenced in parentheses, the standard referenced in parentheses is the source for the definition. 1.3.5 Notes. Notes depicted in this Standard in ALL UPPERCASE letters are intended to reflect actual drawing entries. Notes depicted in Initial Uppercase or lowercase letters are to be considered supporting data to the contents of this Standard and are not intended for literal entry on drawings. A statement requiring the addition of a note with the qualifier “such as” is a requirement to add a note, and the content of the text is allowed to vary to suit the application. 1.3.6 Acronyms and Abbreviations. Acronyms and abbreviations are spelled out the first time used in this Standard, followed by the acronym or abbreviation in parentheses. The acronym or abbreviation is used thereafter throughout the text. 1.3.7 Units. The International System (SI) of units is featured in this Standard. It should be understood that U.S. Customary units could equally have been used without prejudice to the principles established.