Specification for diagrams for process industry — Part 1: General rules
ISO 14617 (all parts), Graphical symbols for diagrams
IEC 60617DB1) Graphical symbols for diagrams
3.2.2
diagram
technical document showing the functions of the objects composing a system and their interrelations using
graphical symbols
3.2.3
overview diagram
diagram providing a comprehensive view of an object with low degree of detailing
[IEC 61082-1:2006, definition 3.4.1]
3.2.5
block diagram
overview diagram predominantly using block symbols
EXAMPLE Rectangular symbols.
3.2.6
process flow diagram
diagram illustrating the configuration of a process system or process plant by means of graphical symbols
3.2.7
function diagram
diagram providing information about the functional behaviour of a system
NOTE Adapted from IEC 61082-1:2006, definition 3.4.2.
3.2.9
piping and instrumentation diagram
P&I D
process flow diagram representing the technical realization of a process system by means of graphical
symbols for equipment, connections and process measurement and control functions
4.2 Technical product documentation
4.2.1 General
Technical product documentation constitutes all technical information about a product or a system in the form
of drawings, diagrams, parts lists, reference designations, technical specifications, etc. Diagrams as specified
in this part of ISO 15519 are part of this technical product documentation.
The technical product documentation for a product or a system shall be structured and each document
classified to ease creation of references between documents in order to ease navigation within the
documentation. IEC 61355 deals with classification of documents. IEC 61355 to a certain degree applies to
the ISO field.
In the matrix of technical product documentation, diagrams and associated information, for example reference
designation and parts lists, constitutes the functional and structural part of the documentation of the product or
system, which makes diagrams one of the most important documents.
4.2.2 Interrelations between diagrams for different purposes
ISO 15226 gives recommendations for documentation during the life cycles of a product.
7.2.1 Reference designation general rules
Each object (plant section, system, equipment, device, component, measuring point, etc.) represented in a
diagram by a graphical symbol shall have an attached reference designation, which shall correspond to those
in the parts list or the associated database.
The reference designation principle in IEC 81346-1 is based on three aspects of viewing the object depending
on:
⎯ what the object does – the function aspect;
⎯ how the object is constructed – the construction aspect;
⎯ where the object is located – the location aspect.
According to IEC 81346-1, the following reference designation prefix signs apply:
= is used for function-oriented reference designations;
− is used for product-oriented reference designations;
+ is used for location-oriented reference designations.
14.3 Function diagrams
A function diagram provides information about the functional behaviour of a system or an object. The diagram
shall present the systems or objects and their interconnections, independent of physical implementation.
When necessary for interpretation, function diagrams should include electrotechnical objects, for example
electrical motors and instrumentation, and also measuring objects, for example measuring instruments,
simplified control loops, actuators, etc.
Function diagrams may include presentation of sequential steps in a process, for example in a coal mining
and coal preparation plant as described in ISO 924.
Figure 37 — Overview diagram of process system using block symbols (block diagram)
Figure 38 — Overview diagram for a material processing plant
Annex B
(informative)
Document type designation and content of information
Table B.1 — Recommended document type designations and contents