UL-60079-17:2017 pdf free download – STANDARD FOR SAFETY Explosive Atmospheres – Part 17: Electrical Installations Inspection and Maintenance.
4.2 Qualification of personnel
4.2DV D2 Modification of Clause 4.2 to replace with the following:
The inspection and maintenance of installations covered by this standard shall should be carried out only by experienced personnel, whose training has included instruction on the various types of protection and installation practices, the requirements of this standard, the relevant national regulations/company rules applicable to the installation and on the general principles of area classification (see Annex B). Appropriate continuing education or training shall should be undertaken by personnel on a regular basis. Evidence of the relevant experience and training claimed shall should be documented and available.
4.3 Inspections
4.3.1 General
4.3.1 .1 Basic Principles
4.3.1.1 DV.1 DE Modification of Clause 4.3.1.1, first paragraph to replace with the
folio wing:
4.3.1.1DV.1.1 Before plant also referred to as “facility” or equipment is brought into service, it shall be given an initial inspection. As part of the plant commissioning and start up procedures, initial inspection and other additional requirements are provided in IEC
60079-14.
To ensure that the installations are maintained in a satisfactory condition for continued use within a hazardous area, either
a) regular periodic inspections, or
b) continuous supervision by skilled personnel, and, where necessary, maintenance shall be carried out.
NOTE 1 In the case of dusts, fibres or flyings, housekeeping can influence the inspection and maintenance requirements.
Following any adjustment, maintenance, repair, reclamation, modification or replacement, the equipment or relevant parts of equipment concerned shall be inspected in accordance with the relevant items of the detailed column of Tables 1, 2 and 3.
The inspection activity should be sufficiently independent of any immediate demands of maintenance and/or other activities so as not to prejudice the reliability of any report findings from the inspection.
NOTE 2 Inspection personnel do not need to be members of an external independent organisation.
If at any time there is a change in the area classification or the Equipment Protection Level requirements or if any equipment is moved from one location to another, a check shall be made to ensure that the type of protection, group and surface temperature, where appropriate, are suitable for the revised conditions.
If plant or equipment is dismantled during the course of an inspection, precautions shall be taken during reassembly to ensure that the integrity of the type of protection is not impaired.
NOTE 3 This includes removing any residual dust and replacing gaskets correctly.
NOTE 4 The major factors effecting the deterioration of equipment include: susceptibility to corrosion, exposure to chemicals or solvents, likelihood of accumulation of dust or dirt, likelihood of water ingress, exposure to excessive ambient temperature, risk of mechanical damage, exposure to undue vibration. Other service factors include: training and experience of personnel, likelihood of unauthorized modifications or adjustments and likelihood of inappropriate maintenance, for example that which is not in accordance with the manufacturer’s recommendation.