Local Vacuum Technology - EBFLOW

 
EBFLOW is a new technology designed specifically for large structure welding

Local Vacuum technology - EBFLOW offers the possibility of eliminating the need for a vacuum chamber and has been developed by CVE for the joining of large structures particularly aimed at the renewable energy generation sectors. This technology has been demonstrated to weld thick sections up to 250mm in steels and light alloys.

EBFLOW main advantages:

EBFLOW system

EBFLOW system

The Local Vacuum nature of EBFLOW is particularly suitable for large tubular thick section material. Welds can be made in a fraction of the time - over 20 times quicker than conventional arc welding methods is not unusual.

Specifications
S355 Steel       EBFLOW SAW FCAW "Stick"

Linear seam 1.3meters x 60mm WT

6.0 mins 8.3hrs   31 hrs 41 hrs
Circular seam  711mm dia     x 40mm WT 3.5 mins 5.0 hrs 47 hrs 63 hrs
Tubulars - Wind Farms and Oil/Gas exploration

Tubulars - Wind Farms and Oil/Gas exploration

Technological innovation in this sector is being driven by the desire to reduce the costs and increase the manufacturing rate of large tubular structures used in tower foundations and offshore rigs of all types.

Specifications

Typically 90 meters long, 9 meters in diameter with 100mm wall thickness, weighing 1,200 tonnes

EBFLOW process particularly suited for wall thickness above 40mm and up to 200mm

3,300 hrs Sub Arc Weld: 60 meters long x 6 meters diameter, 80mm thick section

110 hrs EBFLOW system: 60 meters long x 6 meters diameter, 80mm thick section

Wind Tower flanges

Wind Tower flanges

EBFLOW Technology is being deployed to manufacture flanges from sections rather than forging the whole flange in one piece.

Specifications

Towers for wind energy are made from tubulars joined end on end

Flanges added to the ends of the tubulars are used to join them together

Forgings can be welded and, because there’s no filler wire, the autogenous weld can be heat treated and the weld rendered invisible. It cannot be found using most methods of QC.

Nuclear - Power Generation and Waste Containment

Nuclear - Power Generation and Waste Containment

Modern nuclear power plants rely on the use of large tubular structures to contain high pressure water for cooling and for long term storage of waste.

Specifications

These forgings can also be welded with no filler wire, the autogenous weld can be heat treated and the weld rendered invisible. It cannot be found using most methods of QC.

High integrity autogonus welds and near parent metal strength

Production is quicker, more cost effective and less reliant on a small number of manufacturers so easing a production bottleneck

EBFLOW Vs Submerged Arc

EBFLOW Vs Submerged Arc

Multiple Submerged Arc Welds (SAW) Vs a single pass EBFLOW

Specifications

No joint  "V" preparation required just clean metal to metal

Wide range of materials can be successfully welded

Single pass weld compared to a multi pass conventional arc weld

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