Exhaust piping that passes through any combustible roof must be separated from the roof by a ventilated metal thimble that is at least 6 inches in diameter larger than the piping.
Generator exhaust pipe through roof.
Exhaust piping the exhaust piping is typically long pipe runs from the silencer through to the roof or thru a nearby wall.
Routing exhaust piping through combustible roofs.
Picture of gt exhaust thimble.
If you have a 6 o d.
T 304 and t 316 stainless steel available.
Here the issue is the large thermal expansion of the long runs due to the high temperatures.
The other is the connection between the engine manifold and the silencer or muffler.
Thimbles are necessary in order to pass exhaust pipe through walls and roofs.
Pipe you need 570600 5 denotes tube 600 denotes 6 o d recommended applications.
Wall and roof thimbles provide transitions where it is necessary to pass exhaust pipe through walls and roofs safely to the outside atmosphere.
When an exhaust pipe passes thru a noncombustible concrete or cinder block wall or roof dme has the solution.
Hapco insulated exhaust roof and wall thimbles are recommended for use with exhaust pipes that must pass through a structure.
One is the piping from the silencer to the roof.
The thimbles prevent exhaust pipe heat from being transmitted to the combustible material.
Before installing you should obtain the most up to date copies of local codes applicable to generator set or other applicable installation.
Non insulated exhaust thimble are fabricated with standard carbon steel construction and a built in pipe guide that eliminates hot spots.
Standard finish high heat black enamel.
The thimble must extend at least 9 inches 229mm 10 inches 250mm recommended above and below roof construction.
Clevis and pear shaped pipe hangers.
Inexhaust thimbles conform to nfpa 37 and 110.
Pipe hangers allow exhaust piping to be securely fastened to.