×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Low air supervisory for dry systems?

Low air supervisory for dry systems?

Low air supervisory for dry systems?

(OP)
I was going over last years inspection report with a new client and amongst other things, a deficiency / code violation was called for not having a low air supervisory P switch. A reasonable enough device to expect to find on a dry type system but not a code violation that I know of, nor does anything pop out at me in the 2007 addition of 13. Did I miss a paragraph somewhere?

Regards
Dave

RE: Low air supervisory for dry systems?

Low air is nice to have but not a requirement.

RE: Low air supervisory for dry systems?

Low air pressure monitoring is required for any dry system which is located at a facility which requires "Supervised" automatic sprinkler systems as outlined in the Life Safety Code AND they are also required for any dry system which protects a system with sprinkler piping in an area below 32F (Refrigerated Area Systems).

NFPA 13 (2002 Edition):
D.5 Supervision.
D.5.1 Supervisory Signals. Where supervised, automatic sprinkler systems are required by another section of NFPA 101, supervisory attachments shall be installed and monitored for integrity in accordance with NFPA 72, National Fire Alarm Code, and a distinctive supervisory signal shall be provided to indicate a condition that would impair the satisfactory operation of the sprinkler system. This shall include, but not be limited to, monitoring of control valves, fire pump power supplies and running conditions, water tank levels and temperatures, pressure of tanks, and air pressure on dry-pipe valves. Supervisory signals shall sound and shall be displayed either at a location within the protected building that is constantly attended by qualified personnel or at an approved, remotely located receiving facility.

Also from NFPA 13 (2002 Edition):

7.8.2* Spaces Maintained at Temperatures Below 32°F (0°C).
7.8.2.1 General.
7.8.2.2 Low Air Pressure Alarm.
7.8.2.2.1 Unless the requirements of 7.8.2.2.2 are met, a low air pressure alarm to a constantly attended location shall be installed.
7.8.2.2.2 Systems equipped with local low pressure alarms and an automatic air maintenance device shall not be required to alarm to a constantly attended location.

Life Safety Code (2003 Edition)
9.7.2.1* Supervisory Signals. Where supervised automatic sprinkler systems are required by another section of this Code, supervisory attachments shall be installed and monitored for integrity in accordance with NFPA 72, National Fire Alarm Code, and a distinctive supervisory signal shall be provided to indicate a condition that would impair the satisfactory operation of the sprinkler system. System components and parameters that shall be monitored shall include, but shall not be limited to, control valves, fire pump power supplies and running conditions, water tank levels and temperatures, tank pressure, and air pressure on dry-pipe valves. Supervisory signals shall sound and shall be displayed either at a location within the protected building that is constantly attended by qualified personnel or at an approved, remotely located receiving facility.

The life safety code requires "Supervised" automatic sprinkler systems for many many occupancies; in summary, it really depends on the given occupancy where the dry system is located.

I hope this helps!


 

RE: Low air supervisory for dry systems?

Also required by the IBC, 2006 edition, section 903.4

****************************************
Fire Sprinklers Save Firefighters' Lives Too!


 

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources