Smith Oxy-Fuel Cutting, Heating, and Welding Torch

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Hive13 Equipment
List of All Documented Equipment
Owner/Loaner: Hive13
Hive13 Asset Tag: None
Make/Model: Smith (google)
Arrival Date: June 2021
Does it work?: yes
Certification Needed?: yes
Contact: Dave V
Floorplan: Welding

About this Item

This is a Smiths MC509 Oxy-Acetylene Cutting Torch. with a Smith WH100 handle. It uses MC Series cutting tips. It is a medium duty cutting attachment which cuts up to 6" (153mm) steel. Hive13 has it set up with for oxygen & acetylene.

BE WARNED - Acetylene is Dangerously EXPLOSIVE at 15 PSI

  • Read the Manual - Heed all warnings - Darwinian penalties are inflicted on the careless.
    • Wear personal protective equipment. Wear welding gloves, helmet, leather apron, welding chaps, leather shoes, welding goggles, and other personal protective equipment to help prevent weld burns and injury. NO SYNTHETIC fiber clothing. Welding goggles or face shield with at least a No. 5 filter lens. an Autodark Welding helmet set to Grind mode shades 5 thru 8 provide full face protection.
    • Fasten cylinders securely. Do not handle cylinders roughly. Chain cylinders in an upright position to a wall or cart. When regulators are not on cylinders, keep safety caps in place. Caps will prevent damage to cylinder valves.
    • Never use oil on welding equipment. Oil and grease may ignite spontaneously, when in contact with oxygen.
    • Open cylinder valves correctly. Open the valve on the acetylene cylinder no more than three-fourths of a turn so it can be closed quickly in case of emergency. Open the valve on the oxygen tank fully.
    • Keep the tip pointed away from your body. Do not saturate your clothing with oxygen or acetylene. Before and while lighting the flame, keep the tip pointed away from your body.
      • Light the flame with an approved lighter. Using matches to light the torch brings fingers too close to the tip.
      • Set the operating pressure carefully. Never use acetylene at a pressure over 15 psi.

Follow the manufacturer's recommendations for the correct operating pressures for the metal being welded and for the tip size being used.

    • Do not smoke or allow anyone else to smoke near the oxy-fuel gas welder. If fuel gas were to leak from the unit, smoking could provide ignition and cause a fire or an explosion.
    • Treat the flame with respect.
      • Keep the flame and heat away from the cylinder, hoses, and people.
      • Never lay down a lighted torch. Be sure the flame is out before laying down the torch.
      • Never walk around with a lighted torch.
    • Do not leave the work area until the cylinder valves are closed. Be sure the cylinder valves are closed and pressure is relieved from the hoses before you leave the work area.
    • Never stand in front of a regulator while you are opening a tank valve.
    • Do not weld or cut on containers that have held flammable materials.
    • Remove regulators and replace protective caps before transporting cylinders.
    • Store oxygen cylinders away from acetylene cylinders. A non-combustible wall at least 5 feet high should be used to separate cylinders.
    • Handle hot metal with pliers or tongs. Do not leave hot metal on the welding table because unsuspecting persons may touch it and be burned.
    • Check connections for leaking gases. To prevent fires or explosions, use soapy water to check connections for leaks.
  • Housekeeping: flame circle, no combustibles in cutting area, HAZMAT cabinet, clean up junk or debris
  • Have an A, B, C rated fire extinguisher present
  • Always have a partner, use the buddy system - KEEP A 30 MINUTE FIRE WATCH AFTER END OF TORCH USE.

Make sure gauges return to zero when tank valves are closed, the pressure adjustment valve is backed out and torch knobs are opened acetylene = Red - Left hand threads for acetylene / notch on fittings oxygen = Green - Right hand threads for oxygen / no notch on fittings Use color coded flashback arrestor , check valves NEVER Use thread tape or pipe “dope” Never repair hose damage with tape or other materials - Cracked or nicked hose must not be used Use two wrenches in a “backup” wrench mode for snug fittings Check for leaks with soapy water


Lighting the Torch