2.22 ISO Standards
International Standards Organization
The ISO Standards were originated by European Common Market Countries. They are now adopted
by some North American companies as well. The Standards give guidelines for quality control in
industrial and business operations.
The Standard that covers arc welding operations is ISO 2553. Since standards will eventually be
globalized, we should all know something about ISO 2553. Although the content of the Standard is not
as extensive as CSA W47.1/W59 and AWS D1.1, the Table of Contents is shown below to give an
outline of ISO 2553:
Welded, Brazed & Soldered Joints – Symbolic Representation of Drawings
Contents
1. Scope
2. Normative References
3. General
4. Symbols
4.1 Elementary Symbols
4.2 Combination of Elementary Symbols
4.3 Supplementary Symbols
5. Positions of Symbols on Drawings
5.1 General
5.2 Relationship Between the Arrow Line and the Joint
5.3 Position of the Arrow Line
5.4 Position of the Reference Line
5.5 Position of the Symbol with Regard to the Reference Line
6. Dimensioning of Welds
6.1 General Rules
6.2 Main Dimensions to Be Shown
7. Complimentary Indications
7.1 Peripheral Welds
7.2 Field or Site Welds
7.3 Indication of the Welding Process
7.4 Sequence of the Information In-the-Tail of the Reference Mark
8. Examples of Application of Spot and Seam Joints
ISO 3834 Quality Systems for Welding
ISO 9606 Welder Qualification Procedure