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  • Users: IceYogurt
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  1. IceYogurt

    NFPA 20: Type of valve at test connection on sensing lines

    Hi Engineers. I am asking for advise about the valve type at test connection on pressure-sensing lines. Further to NFPA 20 EDITION 2019 A.4.32(a), it marks the valve as globe valve. However, I cannot understand why it has to be globe rather than ball or gate. I have three doubts, maybe four...
  2. IceYogurt

    Ask for NADCA professionals (Help!)

    Hi. I work as a general Contractor in the construction of residential and office buildings. Our SPEC requires NADCA professionals to conduct duct cleaning, which we haven't done it for residential and office buildings before except for hospitals. And the most difficult part is that we cannot...
  3. IceYogurt

    Detector Placement in Fire Suppression System

    I have read FSSA technical publication (DCG-01) and NFPA 72. However they doesn’t specify the detection placement methods of cross zoning detection in fire suppression system. As per DCG-01, it mentions that “historically, the industry has used an area of coverage per smoke detector of 250...
  4. IceYogurt

    Key Maintenance Switch for FM200 system

    Is it necessary to provide Key Maintenance Switch (Disconnection Switch) for FM200 system? As per Clause 4.3.6 of NFPA 2001 (2018.ED), disconnection switch (key maintenance switch) shall be provided. However, the SPEC doesn't specify key maintenance switch even though the SPEC follows NFPA...
  5. IceYogurt

    Location of FM200 cylinders

    Should FM200 cylinders be located on the concrete pad, or just on the slab? As per IFC and SPEC, there is no requirement for location of FM200 cylinders. However the Engineer insists cylinders to be located on the pad, but I(the Contractor) cannot find the code reference in NFPA 2001. Is the...

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