DIN EN ISO 2553:2012-09

This document defines the symbols and rules to be applied for symbolic representation of welded joints in metallic materials on technical drawings. The symbols included in this document are intended to facilitate communication between the designer, the fabrication shop and examination and inspection personnel. The symbols can be combined with other drawing symbols and may also be supplemented by additional information. However, the symbols cannot always provide all the information necessary in order to ensure that a fabrication is viable. ISO 2553 recognizes that there are two somewhat different approaches in the global market to designate weld arrow side and weld other side on drawings, and allows for either to be used in isolation, to suit a particular market need. Application of either approach identifies a welding symbol in accordance with this document. The approach in accordance with system A is based on ISO 2553:1992. The approach in accordance with system B is based upon standards used around the Pacific Rim.