British Standards symbols

Austin (1979) gives a comprehensive summary of the British Standard symbols, and also shows the American standard symbols (ANSI) and examples of those used by some process plant contracting companies. 

Can you put names to the equipment represented by British Standard symbols ... 

In Europe, the German standards organisation has published a set of guide rules and symbols for flow-sheet presentation, DIN 28004 (1988). This is available in an English translation from the British Standards Institution. 

Standard symbols for instruments, controllers and valves are given in the British Standard BS 1646. 

The recognised body in the United Kingdom for the preparation of specifications for quality, performance or dimensions, methods of test, definitions and symbols, codes of practice, etc. British Standards are prepared under the guidance of representative committees and are widely circulated before they are authorised for publication. BSI co-operates in preparing international standards for rubber and plastics through ISO/TC45 and ISO/TC61 respectively. See ISO. 

British Standards Institute (BSI), BS 5499 Fire Safety Signs. Notices and Graphic Symbols. BSI, London, U.K. 

Chemical Symbols and British Standard No 8X3 London(1938) 2)H. J.Stephenson "A Dictionary of Abbreviations1, Macmillan,NY(1943) 3)Barnes-GibsonrRaymond, Division of Associated Spring Corp,"A Civilian Dictionary of Wartime Abbreviate ns , Detroit ll,Michigan(1945) 4)E.F. Allen,... 

Graphical Symbols tor Piping System and Plant, British Standard 1553 Part 1 1977. 

Figure 7.1c shows the same control loop using symbols given in British Standard BS 1646(l). 

BS 1646 1979 British Standard 1646 (British Standards Institution, London) Symbolic representation for process measurement control functions and instrumentation. 

This list incorporates the relevant symbols from the recommended list and also includes other symbols in common use. Symbols used in the meanings given in round brackets -were proposed by the British Standards Institute for engineering symbols and those in square brackets for electrical engineering symbols they are not generally used in the present work. The didactic and aesthetic value of well-chosen symbols was emphasised by Leibniz in 1678. 

This chapter is aimed at expanding upon the listings of standard test methods presented in the following Chapter 11 on Standardization Documents. The first section of the chapter lists 130 properties of cellular plastics and elastomers and tabulates the standard test methods (U.S., ISO and British Standards) known to be applicable to each. Only number designations are given. The reader will find the titles and complete citations for the standards in Chapter 11. A key to the symbols used is given to indicate the type of cellular materials used (flexible or rigid) and a number of other matters of interest. 

This Glossary contains a number of terms which have been used in the book. Those extracted from BS 499, Part 1 1991, Welding terms and symbols are marked by an asterisk. They are reproduced by permission of the British Standards Institute, 2 Park Street, London WlA 2BS, from whom copies of the standard may be obtained. Where two paragraphs are given, only the first gives the definition in BS 499. 

British Standards BS 5499 Graphical Symbols and Signs is concerned witb a system for giving safety information which does not, in general, require the use of words and covers safety signs, including fire safety signs. 

These are scale drawings based upon the architect s site plan of the building and show the position of the electrical equipment which is to be installed. The electrical equipment is identified by a graphical symbol. The standard symbols used by the electrical contracting industry are those recommended by the British Standard EN 60617, Graphical Symbols for Electrical Power, Telecommunications and Electronic Diagrams. Some of the more common electrical installation symbols are given in Fig. 3.83. 

To understand the design and function of a chemical plant it is a useful preliminary to study the flow diagram (sometimes called a flow sheet). Its purpose is to illustrate diagrammatically, on one sheet of paper, all the items of equipment required for a chemical process or series of processes to be operated. Items are represented by simple symbols which are usually those recommended by the British Standard 974 1953 and subsequent editions (your supervisor may have a copy). The route of materials through the equipment is indicated by arrows and interconnecting lines and, in some instances, the materials of construction, size or capacity, flow rates, power requirements, and pipe dimensions are also shown. 

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