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GENERAL DESCRIPTION
The (BGW) Automatic Girth Welder is a self-propelled machine for horizontal girth (3 o’clock) welding of large
storage tank having 6' – 10.5' (1.8 – 3.2m) high plate courses.
The unit is supported by the shell plates to be welded; the machine has its own welding head, controls, flux belt
assembly and flux recovery unit.
The standard welding equipment integrated is the Lincoln Electric USA submerged arc welding system.
Single and Double Sided Welding
With variations in designs; the Automatic Girth Welder can perform single sided (BGW-1000) or double sided
(BGW-2000) operations.
BGW-1000
The single sided unit, BGW-1000 is the most commonly used unit due to its light weight and simplicity. It requires
only one operator.
BGW-2000
Designed with the same principle as BGW-1000, but with an “A” frame that carries one set of weld head on each
side.
One side, referred to as the master, can be used by itself for one side welding. The second side (slave) is hinged
to the top of the master frame and is used when welding two sides.
The operator can move freely from one side of the machine to another by climbing up the ladder on one side to the
common roof of the double sided machine.
A safety rail is provided at the roof of the main frame for safety purpose.
The BGW-2000 requires two welding power supplies. Each unit has a flux recovery unit and controls.
Welding Process
The BGW-1000 is normally equipped for single wire submerged arc welding.
Typical weld procedure called for a welding travel speed of around 18 in/min (450mm/min), 400A, 28-30V and
WFS of 91'' (2300 mm). Single torch deposition rate is approximately 11 lbs/hr. (5kg/hr.)
TECHNICAL SPECIFICATIONS
1. Input voltage:
3 phase, 380V±10% (Standard)
* Consult factory for non-standard power input
2. Input frequency:
50Hz±5% / 60Hz±5%
3. Operation temperature:
14°F--------+122°F(-10°C--------+50°C); Relative humidity: >90%;
4. Environmental protection:
IP23 grade: F
5. Tank diameter operation range:
> 15' (4.5 M)
6. Operation tank shell plate width:
6'-10.5' (1.8-3.2m) [Standard]
Max. 15' (4.5m) [Special]
* Models and specifications subject to change without notice.
