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When is Steel Pipe Smaller Than 1-Inch Acceptable in NFPA 13? If you ask someone in the fire sprinkler business, they can probably tell you that steel pipe used in sprinkler systems must be at least 1-inch in diameter. They may even add that it can be as small as 3/4-inch for copper tubing or listed brass, stainless steel, or nonmetallic pipe. They may or may not be aware that there are two specific exceptions
Question 1 –  Main Drain Testing Does main drain testing in a multi-story building need to occur at the riser where the underground enters the building, at each floor control valve, or at the auxiliary drain on each floor? Answer:  The answer depends on whether this is acceptance testing in accordance with NFPA 13, or part of testing procedures in accordance with NFPA 25. These two standards look at the testing differently due to the different
Question 1 – Heat Treatment for Bedbugs A thermal termite control process has been proposed for use in residential buildings protected with fire sprinkler systems. It has been noted that this method has been used in California and is gaining popularity on the East Coast. Will the high temperature used in this process, typically 120° F to 140° F, affect sprinkler systems?   Answer: The answer to your question is “yes, most residential sprinklers are not
Question 1: Residential calculations in NFPA 13   You have described a project using the 2013 edition of NFPA 13 and residential sprinklers. There is a group of identical adjacent small rooms each having a single sprinkler. You have indicated that the walls and ceilings have a 1-hour fire resistance rating and ¾ hour self-closing fire doors are used. You have also indicated that in your opinion if a fire starts in a room with
High Temperature Concerns – The Other Side of the Coin Recent articles highlighting the concerns of elevated temperature may have unnecessarily alarmed some members of the fire sprinkler community. The intention of the previous articles was twofold; to provide cautionary advice regarding sprinklers exposed to elevated temperature and to dispel inaccurate information being perpetuated about non-fire operations of sprinklers. While those articles discussed the exposure of ordinary temperature rated sprinklers to elevated ambient temperature there

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