Optics and photonics. Optical coatings - Minimum requirements for antireflecting coatingsWhat is this standard about? This document specifies minimum requirements for the optical effects and the mechanical, chemical and environmental properties of antireflecting coatings. This document applies to antireflecting coatings for optical applications. Thereby the user is able to rely on defined numerical data while the manufacturer of thin films has the choice for the materials and production method.

2 Special apparatus

consumable and welding electrodes for the gas shielded metal-arc welding of unalloyed steels

width across flats

Ranking of Threats by Measures of Risk

BS 8520-3 is not applicable to any other types of vacuum cleaner for vacuuming up liquids or other applications

BS EN 61439-2:2009 Low-voltage switchgear and controlgear assemblies

With obedience and compliance to requirements under BS EN 13532

switchgear and similar electrical equipment in which oil is required as an insulant or for heat transfer

and is not directly concerned with sizing systems as such

This standard is concerned with the structural integrity of the basic tank structure and does not provide requirements for considering process design

1 Materials and design

The fulfilment of a requirement can be waived where justification can be provided that a specific requirement is not applicable to a specific process