Technology

Nordweld’s Automated Tank Building System uses the “Top-Down” method of construction. All shell plates are loaded and fed individually from one location and then rotated around the tank’s periphery. The system consists of 15 ton electro-mechanical Lift Jacks, Roller Beds, Trolley (optional), Tank Rotators, a Welding Station and a Tac weld / welding stand. As the tank is being constructed, it is continually rotated, with all shell joints welded, as well as the attachment of any required nozzles. The system utilizes a mechanised welding processes, designed and refined over many years of continual research and development.

The maximum height of a tank built with our technology is 50 meters with maximum capacity of 700 metric tons. Height of a tank depends on its diameter and other factors that have to be taken into consideration (e.g. wind, tank weight, etc.).

Components

Lift Jacks are used to erect tanks of larger diameter when building in a top-down method. Our Electro-Mechanical jacks have a lift height of 2600mm. The supplied lift jack is CE marked and tested with a 25 ton dynamic load.

The unique characteristics of our Lift Jacks:

  • Lifting capacity of 15,000 kg
  • Electrically Operated – very easy to manoeuvre onsite, both simultaneously and individually
  • Uses a smooth continuously operated lift mechanism
  • No oil spills or leakage possible when compared to Hydraulic systems
  • Self-locking, which ensures the highest operator safety conditions
  • Faster Operating Times – Approx. 25 minutes to raise or lower 2600mm
  • Separate 220V power outlets on each lift jack available
  • Comes supllied with a top mounted perimeter lighting system (optional)
  • Easy and quick assembly of the entire system with minimal operator effort
  • Easy to dismantle onsite. Comes supplied with a specially designed device which enables quick disassembly of the jacks after job completion.
  • Lifting brackets can be welded to the shell, alt. build with a wheel trolley attached upon the lift jack (specially designed for tanks build from coil).
Nordweld Lift Jack for building from prefabricated sheets
Nordweld Lift Jack for building from prefabricated sheets
Nordweld Lift Jack for building from prefabricated sheets
Nordweld Lift Jack for building from prefabricated sheets
Nordweld Lift Jack for building from coil
Nordweld Lift Jack for building from coil
Nordweld Lift Jack for building from coil
Nordweld Lift Jack for building from coil
Nordweld Lift Jack for building from coil
Nordweld Lift Jack for building from coil

Our specially designed continuous Tank Rotator system, unique within the tank building industry, ensures fast and efficient building process. The rotator operates directly from the main base platform in a continuous motion allowing the following construction duties to be carried out safely:

  • during feeding of the material base plates and tac welding; max. speed 1600mm/min. (63in./min.)
  • during welding of the circumferential seam joints; speed 130-1600mm/min. (5-1/8in.-63in./min.) 
Nordweld Tank Rotator
Nordweld Tank Rotator
Nordweld Tank Rotator
Nordweld Tank Rotator
Tack Weld configuration:

The horizontal joint is aligned while the tank is continuously rotated. This means that the tack welding is very simple, fast and extremely cost effective. When attaching any required stiffening rings, the stand is also used to fix each individual ring segment to the shell plate.

Weld configuration:

The stand is equipped with a track which enables a totally autonomous mechanized welding process of both the vertical and horizontal weld seams. It is also possible to use this device to fillet weld required stiffening rings to the outer shell. It can be used with all common industrial welding methods designated by the customer.

Nordweld Tack Weld Stand - Tack Weld configuration
Nordweld Tack Weld Stand - Tack Weld configuration
Nordweld Tack Weld Stand - Tack Weld configuration
Nordweld Tack Weld Stand - Tack Weld configuration
Nordweld Tack Weld Stand - Weld configuration
Nordweld Tack Weld Stand - Weld configuration
Nordweld Tack Weld Stand - Weld configuration
Nordweld Tack Weld Stand - Weld configuration

The roller bed supports the tank during erection, and allows the tank to be rotated. Scaffolding brackets can also be attached to any interior or exterior working platforms. Maximum load: 5 tons.

Nordweld Roller Bed
Nordweld Roller Bed
Nordweld Roller Bed
Nordweld Roller Bed

The welding station is built from the supplied scaffolding components and is covered with a top and side panel curtain. It protects both the operator and the welding equipment from hazardous weather conditions, when work is being performed on the exterior of the tank.

Nordweld Welding Station
Nordweld Welding Station
Nordweld Welding Station frame
Nordweld Welding Station frame
Nordweld Welding Station
Nordweld Welding Station
Nordweld Welding Station frame
Nordweld Welding Station frame

The equipment is delivered in a 20ft HC transport container. The equipment is placed in specially designed interior racks, which makes the transport and delivery very cost-efficient, and also ensures the customer receives the system ready to work. For quick and safe handling of the equipment onsite, the transport rack can be pulled directly out of the container ensuring faster loading and unloading times.

20ft High Cube container for Nordweld Tank Building System
20ft High Cube container for Nordweld Tank Building System
20ft High Cube container for Nordweld Tank Building System
20ft High Cube container for Nordweld Tank Building System

Tank Erection

  1. Unload the container.
  2. Place the annular and bottom plates at the foundation.
  3. Place the equipment at the bottom plates and erect the lift jacks.
  4. Place the 1st course including the top ring.
  5. Assemble the roof construction.
  6. Lift the 1st course.
  7. Assemble the 2nd course.
  8. Lift the entire tank.
  9. Assemble the 3rd course and so on until the tank has reached the final height.
  10. All NDT can be performed at ground level from one location.
  11. Remove the equipment and place the tank at the bottom.
  12. Dismantle the lift jacks.
1. Unload the container.

Nordweld Tank Building System unloaded from a 20ft HC container

2. Place the annular and bottom plates at the foundation.

Foundation required for Nordweld Tank Building System

3. Place the equipment at the bottom plates and erect the lift jacks.

Nordweld Tank Building System already set up

4. Place the 1st course including the top ring.

First and second course of a tank built by Nordweld are ready

5. Assemble the roof construction.

Steel tank roof assembled

6. Lift the 1st course.

Lifting the 1st course using Nordweld TBS lift jacks

7. Assemble the 2nd course.

Second course of the steel storage tank assembled

8. Lift the entire tank.

Nordweld's Lift Jacks lifting the construction

9. Assemble the 3rd course and so on until the tank has reached the final height.

Assembling next courses of the steel tank

10. All NDT can be performed at ground level from one location.

Nordweld TBS erection process can be examined from one place

11. Remove the equipment and place the tank at the bottom.

Placing tank at the ground and removing equipment

12. Dismantle the lift jacks.

Nordweld lift jacks dismantled and removed through one hole

 

Nordweld in numbers

25+

years of experience within the tank building sector

1

20 ft container incudes enough components to erect 18 meters in diameter / 200 tons tank

50%

even that much money and time can be saved in comparison to traditional construction method

700

tons and 50 meters in diameter is the maximum size of a tank that can be built with our system

Would you like to start working together?

Contact us