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ATEX equipment and gland hole drilling

Former Community Member
Former Community Member
i have specified a number of hawke PL630 JBs for a project i am working on, i was under the impression that these could be drilled by the installer as required (providing that the quantity and diameter of holes per face is in accordance with manufacturers reccomendations), however, having spoken to hawke i have been advised that these have to be drilled by a certified company.


just wondering if anybody had some good information on the requirements for self certification, and what equipment can/cant be drilled on site, as i obviously have been mislead into what i thought was accurate and correct knowledge. 


my impression was that anything that wasnt Exd flameproof could be drilled by anybody so long as it was in accordance with manufacturers information.
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    drilling a hole to be within 0.7mm of the diameter of the threaded part that fits inside it is probably possible on-site, but not quickly, but drilling slightly undersize and reaming or filing  up to a tight fit. For a 20mm hole, a length of bar of 20,7mm should not fit.  For smaller holes where drills step up in 0,5mm increments, for example to make a hole that an M6 bolt passes, but a 6,5mm drill bit does not is an easy sort of test -this is not exactly high precision by workshop standards, but it is not just hand held or woodworking tolerance either.

    Mike
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  • 0
    drilling a hole to be within 0.7mm of the diameter of the threaded part that fits inside it is probably possible on-site, but not quickly, but drilling slightly undersize and reaming or filing  up to a tight fit. For a 20mm hole, a length of bar of 20,7mm should not fit.  For smaller holes where drills step up in 0,5mm increments, for example to make a hole that an M6 bolt passes, but a 6,5mm drill bit does not is an easy sort of test -this is not exactly high precision by workshop standards, but it is not just hand held or woodworking tolerance either.

    Mike
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