Ex d Flameproof Equipment Inspection Checklist

This inspection checklist covers all checks required for Ex d flameproof equipment under IEC 60079-17. Use this as a reference guide for preparing for CompEx Ex03/Ex04 assessments and for understanding what a complete Ex d inspection involves.

Visual Inspection — Ex d

• All enclosure bolts present — count every bolt position (Category X if any missing)
• Bolt heads undamaged and correct grade visible
• Cable entries — all fitted with glands or stopping plugs (Category X if any open)
• External earth tag present and uncorroded (Category A if corroded, B if discoloured)
• Enclosure body — no cracks, impact damage, or penetrating corrosion
• Cable sheath — undamaged where visible at gland entry
• Warning labels — present and legible
• No obvious paint overspray on flamepath area (visible from outside)

Close Inspection — Ex d

• All bolt types and grades correct per certificate requirements
• Cable gland thread engagement — minimum 5 full turns (Category X if less)
• Stopping plug thread engagement — minimum 5 full turns
• No IP washer or locknut on threaded Ex d entries
• Barrier gland fitted where required (clearance entries always; threaded entries >2L)
• Flamepath surface — clean, free from paint, corrosion, damage
• Internal earth link present and connected
• Internal condition — clean, dry, no foreign objects
• Cover re-fitted with all bolts to correct torque

Detailed Inspection — Ex d (Additional)

• Flamepath gap measurement with feeler gauges — compare to IEC 60079-1 Table 1
• Flamepath surface dimensions — verify against certificate where accessible
• Motor winding resistance (if applicable)
• Certification check — certificate current, gas group/T-class matches area classification