BS EN 3-8:2006 pdf download
BS EN 3-8:2006 pdf download.Portable firee xtinguishers——
Part 8: Additional requirements toEN 3-7 for the construction, resistance to pressure and mechanical tests for extinguishers with a maximum allowable pressure equal to or lower than 30 bar.
6.4 Overfill pressure test (for water based media cartridge operated extinguishers only)
To make sure the extinguishers will remain safe even in case of overfilling. the extinguishers shall be tested in accordance with Annex G and shall not eject any components In a dangerous manner. This test shall be performed on two samples.
6.5 Resistance to impact
6.5.1 Test conditions
ma and JS claimed by the manufacturer shall be used for the tests In 6.5.2 and Annex C.
6.5.2 Requirements
When tested in accordance with Annex C, extinguishers shalt not show evidence of bursting, breakage or ejection of components. Non-dangerous leaks are acceplable
7 Manufacturing
7.1 General requirements
The manufacturer shall ensure that he has available the manufacturing means and processes suitable for fabncating the bodies in accordance with this European Standard.
The manufacturer shall ensure that the materials and components used wi the fabrication of the body are free from any defect likely to impair the sate use of the extinguisher,
7.2 Welded and brazed parts
7.2.1 General
Pressure beanng webs snail be formed using an automatic wetuing proceoure
Welds and brazed joints shall be free from defects which may ripair the safe use of the body.
7.2.2 WeldIng procedures
The welding procedures shall be based on a welding procedure specification in accordance with EN ISO 15614-1 or EN ISO 15614-12 and shall be qualified in accordance with EN ISO 15614.1 or EN ISO 15614-12 or EN ISO 15614-2.
Other recognised welding EN standards are acceptable.
7.2.3 WeldIng personnel
The welders shall be qualified in accordance with EN 287-1 or EN ISO 9606-2 and the operators in accordance with EN 1418.
7.2.4 BrazIng procedures
The brazing design and brazing procedure shall be described in a brazing procedure specification in accordance with EN 13134.
7.2.5 Brazing personnel
The brazer shall be qualified in accordance with EN 13133.
7.3 Traceability
7.3.1 Pressure retaining parts
The identification and the control 01 the materials for all pressure reta1irig parts shall be such as to ensure that the materials used in manufacture meets the specification of the design.
This is realised by application of adequate procedures internal to the manufacturer such as batch control.
7.3.2 Operating devices, filling caps and hose assemblies
The operating devices, filling caps and hose assernbl.es which are or may be subjected to pressure dunng normal use shall be indelibly marired to permit subsequent identification and traceability.
8 Inspection and testing during production
8.1 Final examination
8.1.1 Final examination personnel
The examination personnel shall be competent to carry out the processes involved.
8.1.2 Proof testing
8.1.2.1 General
All extinguisher bodies shall be tested for re5lstaflce to test pressure and shall meet the requirements of 8.1.2.2.
Fittings shall be tested for resistance to test pressure and shall meet the requirements of 8.1.2.3.
All fittings in Category II or higher of the New Approach Directive 97123/EC Pressure Equipment, shall be subjected
to a pressure test, other fittings shell be pressure tested using an adequate sampling plan.
8.1.2.2 RequIrements for bodies
The test pressure PT shall not be less than 143 times the maximum allowable pressure I’S with a minimum of 20 bar.
The test pressure shall be maintained for a minimum of 30 s and the body shall nut leak. After the test, the body shall not show any visible signs of permanent deformation.
8.1.2.3 Requirements for fittings (excluding pressure relief devices and fittings to be ruptured on over pressure)
The test pressure P shall not be less than 1,43 iimes the maximum allowable pressure PS with a minimum ci 20 bar.
The test pressure shall be maintained for a minimum of 30 s and the fittings shall remain tight and show no dangerous defect.
8.1.2.3 Requirements for assemblies
Compliance of assemblies (bodies • fittings) to the requirements 018.1.2.2 and 8.1.2.3 shall be demonstrated using an adequate sampling plan.
