This document defines the rules to be applied for symbolic representation of welded joints on technical drawings. This can include information about the geometry, manufacture, quality and testing of the welds. The principles of this document can also be applied to soldered and brazed joints. It is recognized that there are two different approaches in the global market to designate the arrow side and other side on drawings. In this document: — clauses, tables and figures which carry the suffix letter "A" are applicable only to the symbolic representation system based on a dual reference line; — clauses, tables and figures which carry the suffix letter "B" are applicable only to the symbolic representation system based on a single reference line; — clauses, tables and figures which do not have the suffix letter "A" or "B" are applicable to both systems. The symbols shown in this document can be combined with other symbols used on technical drawings, for example to show surface finish requirements. An alternative designation method is presented which can be used to represent welded joints on drawings by specifying essential design information such as weld dimensions, quality level, etc. The joint preparation and welding process(es) are then determined by the production unit in order to meet the specified requirements. NOTE Examples given in this document, including dimensions, are illustrative only and are intended to demonstrate the proper application of principles.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Welding symbol
4.1 General
4.2 Basic welding symbol
4.3 Welding symbol systems
4.4 Elementary symbols
4.5 Supplementary symbols
4.6 Arrow line
4.7 Reference line and weld location
4.8 Tail
5 Dimensioning of welds
5.1 General
5.2 Cross-sectional dimensions
5.3 Length dimensions
5.4 Butt welds
5.5 Fillet welds
5.6 Plug welds in circular holes
5.7 Plug welds in elongated holes (slots)
5.8 Spot welds
5.9 Seam welds
5.10 Edge welds
5.11 Stud welds
5.12 Overlay welds
5.13 Stake welds
6 Dimensioning of joint preparations
6.1 General
6.2 Root gap
6.3 Included angle
6.4 Root radius and depth of root faces — U and J butt joints
6.5 Depth of joint preparation
6.6 Countersink angle for plug welds
7 Alternative butt weld symbol with required weld quality
7.1 General
7.2 Example
Annex A Examples of the use of welding symbols (informative)
Annex B Tolerances and transition points for weld types (informative)
Annex C Alternative methods for designating intermittent butt and fillet welds (informative)
25901-3 Welding and allied processes -- Vocabulary -- Part 3: Welding processes
ISO 128-15:2013 Technical product documentation (TPD) -- General principles of presentation -- Part 15: Presentation of shipbuilding drawings
ISO 128-1:2003 Technical drawings -- General principles of presentation -- Part 1: Introduction and index
25901-3 Welding and allied processes -- Vocabulary -- Part 3: Welding processes
ISO 128-15:2013 Technical product documentation (TPD) -- General principles of presentation -- Part 15: Presentation of shipbuilding drawings
ISO 128-1:2003 Technical drawings -- General principles of presentation -- Part 1: Introduction and index
ISO 128-1:2020 Technical product documentation (TPD) — General principles of representation — Part 1: Introduction and fundamental requirements
ISO 128-20:1996 Technical drawings -- General principles of presentation -- Part 20: Basic conventions for lines
ISO 128-21:1997 Technical drawings -- General principles of presentation -- Part 21: Preparation of lines by CAD systems
ISO 128-22:1999 Technical drawings -- General principles of presentation -- Part 22: Basic conventions and applications for leader lines and reference lines
ISO 128-23:1999 Technical drawings -- General principles of presentation -- Part 23: Lines on construction drawings
ISO 128-24:2014 Technical drawings -- General principles of presentation -- Part 24: Lines on mechanical engineering drawings
ISO 128-25:1999 Technical drawings -- General principles of presentation -- Part 25: Lines on shipbuilding drawings
ISO 128-30:2001 Technical drawings -- General principles of presentation -- Part 30: Basic conventions for views
ISO 128-33:2018 Technical product documentation (TPD) -- General principles of presentation -- Part 33: Representation of views, sections and cuts in construction drawings
ISO 128-34:2001 Technical drawings -- General principles of presentation -- Part 34: Views on mechanical engineering drawings
ISO 128-40:2001 Technical drawings -- General principles of presentation -- Part 40: Basic conventions for cuts and sections
ISO 128-43:2015 Technical product documentation (TPD) -- General principles of presentation -- Part 43: Projection methods in building drawings
ISO 128-44:2001 Technical drawings -- General principles of presentation -- Part 44: Sections on mechanical engineering drawings
ISO 128-50:2001 Technical drawings -- General principles of presentation -- Part 50: Basic conventions for representing areas on cuts and sections
ISO 129-1:2018 Technical product documentation (TPD) -- Presentation of dimensions and tolerances -- Part 1: General principles
ISO 3098-2:2000 Technical product documentation -- Lettering -- Part 2: Latin alphabet, numerals and marks
ISO 4063:2009 Welding and allied processes -- Nomenclature of processes and reference numbers
ISO/TR 25901-1:2016 Welding and allied processes -- Vocabulary -- Part 1: General terms
ISO/TR 25901-3:2016 Welding and allied processes -- Vocabulary -- Part 3: Welding processes
ISO/TR 25901-4:2016 Welding and allied processes -- Vocabulary -- Part 4: Arc welding