BS EN ISO 8785:1999 pdf free.GEOMETRICAL PRODUCT SPECIFICATION (GPS) – SURFACE IMPERFECTIONS – TERMS, DEFINITIONS AND PARAMETERS.
Introduction
BS EN ISO 8785 is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard (see ISO/TR 14638). It influences the chain links 1 and 2 of the chain of standards for surface imperfections.
For more detailed information of the relation of this standard to other standards and the (]PS matrix mode, see Annex A.
BS EN ISO 8785 defines terms relating to surface imperfections in order to establish a common vocabulary to be used in technical documents, technical drawings. scientific publications, etc. to specify to what extent surface imperfections are allowed and to aid in the specification of methods of measuring surface imperfections.
The surface imperfections defined in this International Standard are not related to surface roughness’) or surface waviness.
It does not specify the desirability or undesirability of surface imperfections, which depend on the application or function of the surface.
For specific applications and manufacturing processes, additional terms and definitions may be necessary. Such terms and definitions will be specified in relevant International Standards.
Some types of specific surface imperfections are defined in other International Standards as well.BS EN ISO 8785 pdf download.