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Aluminum Tank Roofs

Swiss engineering company ENCE GmbH together with its close-knit team consisting of technical and commercial specialists of service facilities and affiliated companies in different CIS countries is willing to carry out the following complex projects on the turnkey basis.

Tank Internal Floating Roofs
The floating roof design

The floating roof design corresponds to requirements of the following standards:

  • API 650 Appendix H
  • The Oil Company Material Association ST-1
  • BS 2654 Appendix E
Main Advantages
  • Maintenance is not required
  • 95-98% loss reduce
  • Life of the structure
  • Small costs for installation
  • Easy assembly
Materials
  • Stainless steel
  • Aluminum
Example calculation of evaporation losses (Example 1)
Tank characteristics:
Tank diameter: 12 m
Oil product: petrol
Tank height: 10 m
Product temperature: 15°С
Average filling depth: 50%
Average temperature change: 10°С

Annualized losses:

Without floating roof:
10 years 20 years 30 years
Constant losses: 8641 l 8641 l 8641 l
Operating losses: 20347 l 40694 l 61041 l
Total: 28988 l 49335 l 69682 l
With floating roof:
Constant losses: 2799 l 2799 l 2799 l
Operating losses: 10 l 19 l 29 l
Total: 2809 l 2818 l 2828 l
Oil product annual savings: 26179 l (91,5%) 46517 l (95%) 66854 l (96,4%)
Example calculation of evaporation losses (Example 2)
Tank characteristics:
Tank diameter: 25 m
Oil product: petrol
Tank height: 20 m
Product temperature: 13°С
Average filling depth: 50%
Average temperature change: 7°С

Annualized losses:

Without floating roof:
5 year 10 year
Constant losses: 33803 l 33803 l
Operating losses: 82684 l 165368 l
Total: 116487 l 199171 l
With floating roof:
Constant losses: 6708 l 6708 l
Operating losses: 20 l 40 l
Total: 6728 l 6728 l
Oil product annual savings: 109759 l (94,9%) 192403 l (97%)
Aluminum Dome-Tank Roofs
Advantages of the offered dome-tank roofs
  • Long operating life
  • Built-up construction, easy installation and transportation
  • High corrosion resistance
  • Low cost maintenance
  • Particularly light construction