BS EN ISO 2553 pdf free download

BS EN ISO 2553 pdf free download. Welding and allied processes – Symbolic representation on drawings – Welded joints.
4 Welding symbol 4.1 General A reference line and arrow line are required elements. Additional elements may be included to convey specific information. It is preferable to show the welding symbol on the same side of the joint that the weld is to be made, i.e. the arrow side (see 4.7). The thickness of the arrow lines, reference line, elementary symbols and lettering shall be in accordance with ISO 128 (all parts) and ISO 3098-2. In order not to overburden drawings, reference should be made to notes in the drawing or other design- related documents. 4.2 Basic welding symbol If joint details are not specified and the only requirement is to indicate that a joint is to be welded, the basic symbol shown in Figure 1 may be used. In this case, a dual reference line is not required for system A (see 4.7.1 A) as no details concerning the weld are being conveyed.
DJ LIN 13LJ L333LV1’
Iso 2553:2019
4.3 Welding symbol systems
This document recognizes two different systems, A and B, to designate the arrow side and other side on drawings.
The symbolic representation in system A is based on a dual reference line consisting of a continuous line and a dashed line (see 41).
The symbolic representation in system B is based on a single reference line (see 41).
Clauses, Tables and Figures which carry the suffix “A” or “B” are applicable only to system A or system B respectively.
Clauses, tables and figures which do not have a suffix are applicable to both systems.
System A and B shall not be mixed and drawings shall clearly indicate which system is used including units of measurement in accordance with ISO 129-1.
Examples of comprehensive welding symbols showing the location of elements are given in Figure A.1.
4.4 Elementary symbols
4.4.1 General
Elementary symbols, in accordance with Table 1. may be added to the reference line in both systems A and B to indicate the type of weld to be made.
Elementary symbols form part of the welding symbol and shall he drawn attached to the reference line generally at the mid-point.
Elementary symbols may be complemented by:
— supplementary symbols (see 4.S and Table 3)
— dimensions (see Clause 5)
— complementary information.
The orientation of the elementary symbols shall not be changed to that shown in Tables 1 to 3..
Annex B gives guidance on tolerances and transition points for butt welds, edge welds and fillet welds.
If clear illustration by means of symbols is not possible, cross-sections of the welds may be drawn and dimensioned.
4.4.2 Combinations of elementary symbols
Elementary symbols may be combined as required to represent particular weld configurations.
4.4.3 Double-sided butt welds
The elementary symbols shall be arranged opposite each other on the reference line, including all required information, when used to represent double-sided butt welds.
In the case of symmetrical double-sided welds with identical symbols and dimensions, the dashed reference line should be deleted for system A (see Table 2).
An example of an asymmetrical double-sided weld is shown in Table A.3.BS EN ISO 2553 pdf download.