Bell Hydromatics Applications of Bell Hydromatics hydraulic machine
Advantages of Bell Hydromatics punchline hydraulic machine system
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Safety First

Hydraulic jacking System is one of the most safest mode to erect storage tank, complete work is executed on ground level preventing risks of accidents. For decades, there has been not a single report that proves its credibility in being the safest and most likely method for the storage tank construction. The hydraulic jack systems has now gained a lot of popularity, due to which the demand for a tall boom crane has declined.

No Scaffolding Required

Our efficient hydraulic jacking systems needs various scaffolding and attachments to offer comfortable access for welding heights, but now all weldings can be done at ground level.

Easier Inspection

Welding inspectors can now perform ultrasonic as well as several other non destructive tests on welds at ground level, it allows easier inspection for better quality control. There is no more climbing up to perilous positions for welding inspectors, now.

Faster Erection

The shell plates are erected at ground level in place of being installed at the height of about 30 feet or more, in order to save construction time required for the alignment of plates. The time and manpower needed for lifting the plates to the height is amputated. Construction work remains unaffected by snow or rain, hence most of the work is done under the protection of the tank itself.

Tank Erection Top Downwards Cuts Construction Time And Cost Considerably :

New shell plates are developed at the ground level in place of being hauled up to about 30 feet heights or more, saving considerable time desired for alignment of plates. The cumulative time needed for lifting of men and material to the heights that is eliminated. Tank construction work stays practically unaffected from rain or snow, hence most work is performed under the protection of the tank itself.
  • Most of the manufacturing work is done at ground level that assists in faster erection and reducing the risk of possible injuries
  • Faster erection
  • Eliminates the requirement of the crane
  • Cost of jacking equipment can be easily recovered after construction of 3 to 4 storage tanks or by erecting about 1200 tons of tankage. Jacking cost is approximately USD 50 per ton for 1200 tons
Example : Tank of 30 m diameter weighing about 300 tons requires 30 jacks of 12 ton each. Full cost of jacking equipment can be recovered in 4 such tanks.

Model Description 510-35D 2510-50D
Working Capacity (metric tons) 12 25
Testing load (metric tons) 18 37.5
Standard arc distance between jacks (m) 1.80 to 3.0
Max plate height for which jacking equipment can be supplied (m) 2.5 or 3.0 or more
Min plate height that can be used (m) 1.40
Min safe bearing capacity below trestle base plate (N/mm2) 1.45
Plate thickness range (mm) 6 - 40 8 and above
Unitary climb (cm/stroke) 10
Time per stroke (minutes) Approx 5
Working pressure (kg/cm2) 120 135
Retracting system spring hydraulic


Highlights

  • For shell plates of more than 2500 width (height), jacking equipment can be supplied against specific requirements.
  • Standard jacking equipment can be used for minimum shell plate width (height) of 1400 mm. and maximum of 2500 mm.
  • Jacking equipment is supplied with singe jack lifting capacities of 8 tons 12 tons 25 tons.
  • Gasholder tanks Horton spheres or spherical tanks for storage of propane, ammonia in gaseous form.
  • Storage tanks with different types of roof (floating roof, fixed roof, suspended deck roof, column supported roof).
  • Cryogenic tanks for storage of propane, ammonia at cryogenic temperatures.
Dimensions of some tanks that have been actually erected using jacking equipment are:
  • Smallest diameter of tank erected using jacking equipment : 6 mtrs*
  • Largest diameter of tank erected using jacking equipment : 92 mtrs*
  • Maximum weight of tank erected using jacking equipment : 1900 tons*

Applications :

  • Dismantling of old tanks
  • Repair to tank foundation
  • Building of field erected storage tanks
  • Repair or replacement of tank bottom plate
  • Increasing tank capacity by adding shell rings or courses
  • Erection of other circular structures such as reactor shields in nuclear power stations, etc.





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