ISO 2553:2013 pdf download – Welding and allied processes – Symbolic representation on drawings – Welded joints
1 Scope This International Standard defines the rules to be applied for symbolic representation of welded joints on technical drawings. This may include information about the geometry, manufacture, quality and testing of the welds. The principles of this standard may 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 Interational Standard:
— 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 International Standard may be combined with other symbols used on technical drawings, for example to show surface finish requirements. An alternative designation method is presented which may 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 International Standard, including dimensions, are illustrative only and are intended to demonstrate the proper application of principles. They are not intended to represent good design practices, or to replace code or specification requirements.
In the absence of a length dimension, the weld shall be continuous along the entire length of the joint except when using the weld from point to point symbol where the weld extends only between the identified points. Start and end points of welds that are not continuous along the entire length of the joint shall not be part of the welding symbol but indicated clearly as part of the drawin.
5.3.2.1 General
Dimensions of intermittent welds shall be placed to the right of the elementary symbol (see Table 5):
a) number of weld elements, n
b) length of weld elements, l
c) spacing between weld elements, e (in parentheses)
A multiplication symbol shall be placed between the number of elements, n, and the length of the weld elements, l. If the number of weld elements is not specified, the intermittent weld shall be made along the whole length of the joint. NOTE Other methods, commonly used by Pacific Rim countries, for designating intermittent welds are shown in Annex C.
5.3.2.3 Staggered intermittent welds
Staggered intermittent welds made on both sides of the joint, shall be designated using the “Z” symbol across the reference line (see Table 3, item 13). In the absence of any information concerning the offset, the centres of the weld elements on one side of the joint shall correspond with the centres of the gaps on the opposite side of the joint. Otherwise, the offset shall be specified in the tail or elsewhere.