The documentation to get watermist accepted

Watermist, still being a commercially young technology, needs “good” documentation to get accepted by the AHJs. Since watermist needs fire testing to determine the system specific data, it is often  the test data which is required, however the problem with this is that it can be difficult for non-related watermist people to read and understand test data. For the same reason most AHJs require approvals because it becomes easier to accept the result. Below sections explain the main difference between Approvals and Fire Testing, and what safety levels one can expect from each of them.

Watermist approvals

A notifying body approval from FM, VDS, UL, DNV, etc. will consist of a listing which is fully controlled. This means that they list the system on a public webpage where everybody can verify that the approval exists and is valid. To get such a watermist approval the system has to undertake four approval parts:

– Fire testing of the system to a fire test protocol they refer to (often this protocol is issued by themselves).
– Component testing of the system components to a test protocol they refer to.
– Approval of the system DIOM, drawings, technical literature.
– Approval of the production facilities.

The fire tests can be conducted in certain recognized test laboratories, minimum having an ISO 17025 accreditation, but often also needing additional approvals or acceptance from the notifying bodies. The fire tests are always witnessed by the notifying bodies, independent of laboratory approvals and accreditations.
All component tests are carried out in the notifying bodies own laboratories, and these tests often take more than one year to complete. Revision marked technical and sales literature are approved, and finally the production facilities have to be approved, and this is independent of the production facilities existing ISO 9001 accreditation approvals.

The only limitations to these approvals are the scope since not all applications or systems are covered by Approval Standards. In these cases more ad-hoc Watermist Fire Testing is the solution.

Watermist fire tests

Ad hoc watermist testing can be just as good documentation as notifying body approvals, however more care is needed when working with it since it can be harder to determine whether everything has been done correct and a high standard. Some examples of good ad-hoc documentation are:

– The fire tests shall be conducted in an ISO 17025 accredited laboratory with experience in testing watermist systems,
– The fire test results shall be presented in a report, and the report shall refer to that the entire test series has been conducted to an available test protocol,
– 3 party witness documentation, not coming from the test laboratories,
– The products tested shall be component tested to an existing component test standard in an ISO 17025 accredited laboratory with experience in component testing watermist systems,
– The products shall be produced in ISO 9001 accredited facilities,
– The system technical literature shall match the data found in the actual testing.