European Committee for Standardization

Rubber and plastics hoses - Assessment of ozone resistance under static conditions
 N EN ISO 7326

Annotation

This document specifies five methods for determining the ozone resistance of the outer covers of hoses:

— method 1, for bore sizes up to and including 25 mm, carried out on the hose itself;

— method 2, for bore sizes greater than 25 mm, carried out on a test piece from the hose wall;

— method 3, for bore sizes greater than 25 mm, carried out on a test piece from the cover;

— method 4, for all bore sizes, carried out on the hose itself;

— method 5, for all bore sizes, carried out on hoses that are expandable, for example textilereinforced hoses.

NOTE For hoses with built-in fittings from which it is not possible to take test pieces, the ozone resistance can be assessed on slabs in accordance with ISO 1431-1, using test sheets of the appropriate polymeric compound vulcanized to the same degree.

Автоматический перевод:

Резина и шланги пластмассы - Оценка сопротивления озона под статическими условиями

Этот документ определяет пять методов для определения сопротивления озона внешних покрытий шлангов:

— метод 1, для диаметров цилиндра до и включая 25 мм, выполненных на самом шланге;