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  2. Engineering controls for nanomaterials - Wikipedia

    en.wikipedia.org/wiki/Engineering_controls_for...

    Fume hoods are recommended to have an average inward velocity of 80–100 feet per minute (fpm) at the face of the hood. For higher toxicity materials, a higher face velocity of 100–120 fpm is recommended in order to provide better protection.

  3. Engineering controls - Wikipedia

    en.wikipedia.org/wiki/Engineering_controls

    Fume hoods are recommended to have an average inward velocity of 80–100 feet per minute (fpm) at the face of the hood. For higher toxicity materials, a higher face velocity of 100–120 fpm is recommended in order to provide better protection.

  4. Process duct work - Wikipedia

    en.wikipedia.org/wiki/Process_Duct_Work

    Cement and lime plant duct velocity at normal operations is 3000 to 3200 foot per minute, lead plant velocities are 4000 to 4500 foot per minute, as the dust is heavier. Other industries, such as grain have lower gas velocities. Higher duct gas velocity may require more powerful fans than lower duct velocities.

  5. Fume hood - Wikipedia

    en.wikipedia.org/wiki/Fume_hood

    Improper monitoring of fume hood velocity and movements within the enclosure may create a wake that can expose workers to hazardous materials from inside the fume hood. [ 92 ] [ 93 ] Fume hoods require regular maintenance to ensure consistent functionality; this is in addition to the standard precautions and measures taken during regular ...

  6. Duct (flow) - Wikipedia

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

    Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. NFL hot seat rankings: Which coaches are in most trouble ...

    www.aol.com/nfl-hot-seat-rankings-coaches...

    Several coaches are squarely on the NFL hot seat entering Week 18, with Mike McCarthy and Brian Daboll among those facing uncertain futures.

  9. Federal Motor Vehicle Safety Standards - Wikipedia

    en.wikipedia.org/wiki/Federal_Motor_Vehicle...

    Part 542: [89] Procedures for selecting light duty truck lines to be covered by the theft prevention standard; Part 543: [90] Exemption from vehicle theft prevention standard; Part 544: [91] Insurer reporting requirements; Part 545: [92] Federal motor vehicle theft prevention standard phase-in and small-volume line reporting requirements

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