Mathey Dearman 3SA Saddle Machine - Manual (Page 11)

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6.4 Adjust the oxygen and fuel gas regulator per the regulator manufacturer’s instructions.
6.5 Light the cutting torch per the torch manufacturer instructions.
Note: If the pipe is coated with Polyurethane, Carbo Zinc, and Epoxy or is heavily rusted it will require that the
coating be burnt off or removed by some other method in order to achieve a quality cut.
6.6 Follow the torch manufacturer’s instructions for preheating the pipe.
6.7 While rotating the machine torch around the pipe, move the cutting oxygen valve to the ON position to penetrate the
pipe per the torch manufacturer’s instructions.
Note: If the torch penetrates the pipe without the machine being rotated it will create a notch in the bevel that is
unacceptable to most welding codes.
6.8
Rotate the torch around the pipe until the cut is complete.
6.9 Close the cutting oxygen valve of the cutting torch to the OFF position per the torch manufacturer’s instructions.
instructions.
6.10 Close the fuel and oxygen valve of the torch per the torch manufacturer’s instructions.
6.11 Close the valve on the Oxygen and fuel gas bottles if no further cuts are to be made per the torch
manufacturer’s instructions.
A Note on Back Beveling
Remove the oxy/fuel or torch from the torch carrier assembly. Rotate the Torch Clamp Base and Torch 180
degrees on the Torch Arm and re‐tighten with thumbscrew and clamp. Reinstall the oxy/fuel or torch from
the torch carrier assembly. When back beveling, place Torch as close to Saddle as possible without placing
flame directly on or near Saddle. The Torch is now positioned for back beveling.
Caution:
The pipe and debris from the cutting process are extremely hot and can
cause serious injury.
Caution:
When back beveling, the cutting flame and “hot” zone of the pipe is
directed toward the operator.
Caution:
Keep hands and clothing away from the gearing as it will cause
serious injury.
Caution:
Some coatings are known cancer‐causing agents. Adequate
protection such as a fresh air device should be worn.