Natural gas — Correlation between odorant concentration in air and odour intensity
This document describes how to establish the correlation between odorant concentration in air and odour intensity, usually presented in the form of odour intensity curves, following the odour intensity scale presented in Clause 5.
This document does not fix a required level of odour intensity in the natural gas: this prescription is specified by local/national regulation.
Ophthalmic optics — Spectacle lenses — Fundamental requirements for uncut finished lenses
ISO 14889:2013 specifies fundamental requirements for uncut finished spectacle lenses. It is not applicable to protective spectacle lenses.
ISO 14889:2013 takes precedence over the corresponding requirements of other standards, if differences exist.
Adventure tourism — Cyclotourism — Requirements and recommendations
This document establishes requirements for adventure tourism involving cyclotourism (e.g. road bike, mountain bike or fatbike), relating to the safety of participants, leaders and assistants.
In cases of cycle tourism operations that involve overnight stays, additional requirements are required, which are described in Section 11 of this Document.
This document also establishes criteria relating…
Analyse des gaz — Méthodes de comparaison pour la détermination et la vérification de la composition...
La présente Norme internationale décrit des méthodes pour
a) déterminer la composition d'un mélange de gaz pour étalonnage par comparaison avec des mélanges
appropriés de gaz de référence,
b) calculer l'incertitude de la composition d'un mélange de gaz pour étalonnage par rapport à l'incertitude connue
de la composition des mélanges de gaz de référence avec lesquels il a été…
