BUG-O Systems BGW-5000 - Manual (Page 10)

10
I. GENERAL DESCRIPTION
The (BGW) Automatic Girth Welder is a self-propelled machine for horizontal girth (3 o’clock) welding of
large storage tanks 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 into the unit is the Lincoln Electric USA submerged arc welding
system. Please consult factory for integration with other welding equipment (e.g. ESAB, Miller).
1.1. Single and Double Sided Welding
With variations in designs; the Automatic Girth Welder can perform single sided (BGW-5000) or double
sided (BGW-6000) operations.
BGW-5000
The single sided unit, BGW-5000 is the most commonly used unit due to its light weight and simplicity. It
requires only one operator.
BGW-6000
Designed with the same principle as BGW-5000, but with an “A” frame that carries one set of weld heads on
each side of the tank.
One side, referred to as the master, can be used by itself for one sided 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. Two operators are required for normal operation.
A safety rail is provided at the roof of the main frame for safety purpose.
The BGW-6000 requires two welding power supplies. Each unit has a flux recovery unit and controls.
1.2. Welding Process
The BGW-5000 is normally equipped for single wire submerged arc welding.
Typical weld procedure calls 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.)
BUG-O systems is not responsible for any welding parameters or guidelines for the BGW machines and or
the SAW process.
Please have all parameters for SAW provided prior to the beginning of setup of machines.
We do offer a starting guide for parameters in our instruction manual, this is just a guide and not an exact
set of parameters to be followed.