| . |
|
WELDING, CUTTING, AND BRAZING |
. | |||
Oxygen-Fuel Gas Welding and Cutting - Pipe System Protection |
||||||
|
In addition to using release devices, the system must be designed, using
proper hoses, to protect against leaks. The Oxygen hose is green and has a right-hand
threaded nut for connecting to the torch. The Acetylene fuel gas hose is
usually red (sometimes black) and has a left-hand threaded nut for connecting to the
torch. Hose and hose connections shall be clamped or otherwise securely fastened in a manner that will withstand, without leakage, twice the pressure to which they are normally subjected in service, but in no case less than a pressure of 300 psi. Oil-free air or an oil-free inert gas shall be used for the test. Hoses showing leaks, burns, worn places, or other defects rendering it unfit for service shall be repaired or replaced. When inspecting hoses, look for charred sections close to the torch. These may have been caused by flash-back. Also check that hoses are not taped up to cover leaks. Now it's time to test your knowledge. Go to the next page. |
|||||
|
||||||
| . |
