10.9.1 Mounting arrangements of the elements and components
The breathing and draining elements shall be sintered or cemented in accordance with
Clause 6, or fixed by other methods into a suitable mounting part to form the mounting
component.
The mounting component is secured by clamping or by fasteners or screwed into the enclosure
as a replaceable unit complying with the relevant requirements of Clauses 5 and 6 and, where
appropriate, Clause 11.
10.9.2 Type tests for breathing and draining devices used as Ex components
Attachment of the sample device under test shall be made on the end of the test rig enclosure
in the same manner as it would normally be mounted on a flameproof enclosure. The test shall
be performed on the sample after the impact test of 10.8 and in accordance with 10.9.2.1 to
10.9.2.3.
NOTE The impact test may be performed on the sample, separate from the test enclosure when it is mounted on a
plate that forms the end part of the test rig enclosure.
For devices with non-measurable paths, the maximum bubble test pore size of the sample shall
be not less than 85 % of the specified maximum bubble test pore size. See B.1.2.
10.9.2.1 Test of the ability of the breathing and draining device to withstand pressure
10.9.2.1.1 Test procedure
The reference test pressures in each gas group are