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2. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   The 300 m (980 ft) high steam plant chimney at the Secunda CTL's synthetic fuel plant in Secunda, South Africa consists of a 26 m (85 ft) diameter windshield with four 4.6 metre diameter concrete flues which are lined with refractory bricks built on rings of corbels spaced at 10 metre intervals. The reinforced concrete can be cast by ...

3. Flue - Wikipedia

   en.wikipedia.org/wiki/Flue

   A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1] In the United States, they are also known as vents for boilers and as breeching for water heaters and modern furnaces.

4. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Round duct is made using a continuous spiral forming machine which can make round duct in nearly any diameter when using the right forming die and to any length to suit, but the most common stock sizes range evenly from 4" to 24" (10-60 cm) with 6"-12" (15-30 cm) being most commonly used. Stock pipe is usually sold in 10' (300 cm) joints.

5. Direct vent fireplace - Wikipedia

   en.wikipedia.org/wiki/Direct_vent_fireplace

   The design of the direct vent fireplace allows for such a high level of efficiency because of the sealed firebox. The sealed firebox only allows combustion gasses to leave the system and exit the building. Since it is sealed, no warm air from the room is able to be drawn into the firebox and expelled out of the building. [8]

6. Nominal Pipe Size - Wikipedia

   en.wikipedia.org/wiki/Nominal_Pipe_Size

   Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

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8. Process duct work - Wikipedia

   en.wikipedia.org/wiki/Process_Duct_Work

   Ductwork designed for explosive dust is typically designed for 50 psi internal pressure, and will typically have one explosion relief one vent per duct section. the likelihood of a dust explosion on an indirect coal mill system is 100%, over time. This can generate a plum of fire 5 ft. to 15 ft. in diameter, and 20 ft. to 30 ft. long.

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