Inspection & Maintenance Services
Duosphere Double-Membrane Gasholders - Inspection & Maintenance.These inspection activities are undertaken each year, with the alternate year's inspection being more intrusive.
Our maintenance schedule can broadly be split into...
Our maintenance schedule can broadly be split into two categories. A full list of our extensive maintenance schedule is available as a pdf download below:
Annually
- Confirm asset details correspond to original specification
- Electrial isolation, visual inspection and check operation of all electrical equipment
- Visually check for corrosion and damage to mechanical components and fittings
- Check and report on condition of all pipework
- Visual inspection and report of outer and inner membrane as applicable
- Carry out small fabric repairs if required or immediately possible
- Check and report of inner membrane anchorages and fixings
- Vusually inspect security of u/s transducer and cable
- Check air damper valve for smooth operation, and proper pressure settings
- Lubricate and sdjust settings of mechanical gas PRV
- Visually inspect and report on all earthing arrangements
- Thoroughly clean all external components and enclosures, check paintwork
Biennially
- Empty gasholder of gas from inner membrane through the flare
- Purge gasholder in preparation of maintenance schedule
- Check and report for corrosion on all mechanical components
- Enter and visually inspect inner membrane for obvious damage and report
- Check for correct location of ballast ring and target board if appropriate
- Inspect staps and cables for chafing and other damage
- Check satisfactory operation of all valves and actuators, fixed and hand
- Operate system valves so that upper gas operational level is reached
- Simulate an inner membrane leak and check alarm is raised
- Check condition of lightning conductor system and associated cabling
- Check compound is secure and free of foilage, weeds and other debris
- Ensure remedial actions confirm to M & E 3039
Downloads related to this service
Gasholder Enquiry Sheet Brochure
EC Declaration of Conformity Brochure
EC Declaration of Incorporation Brochure
Project Reference List Brochure
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