American Fire Sprinkler Association [http://www.firesprinkler.org/] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AFSA Technical Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A newsletter dealing with codes and other technical issues May 23, 2014 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Water Supply Adequacy Test From Main Drain "The property in question has 6 in. and 8 in. pressure reducing valves in line before the riser. If the residual psi at the base of the riser from the hydraulic plate indicates higher than the residual psi on a 2 in. main drain test, does this indicate a problem?" We have reviewed NFPA 25, 2014 edition as the applicable standard as well as NFPA 13, 2013 edition. Our informal interpretation is that main drain test results are used to discover water supply problems only. Main drain tests cannot be relied upon to accurately determine whether the system demand is being satisfied. Conducting a full water supply test with nearby fire hydrants only completes that determination. The main drain test's only purpose is to flag possible problems in the water supply and the determination can only be made by comparing the current test results to previous main drain test results including the original commissioning test. The initial main drain test results are required to be recorded on the Contractor's Material and Test Certificate for Aboveground Piping form shown in Figure 24.1 of NFPA 13. The baseline static and residual pressures should not be compared with the water supply test from a hydrant as a pass or fail of the system. Once the initial main drain test is completed, the subsequent main drain tests required by NFPA 25 in Section 13.2.5 are to be conducted annually for each water supply lead-in to either an individual fire protection system riser or manifold with multiple systems to determine whether there has been a change in the condition of the water supply piping and control valves. The annex for this section explains that these drains also are used to determine whether there is a major reduction in waterflow to the system, such as could be caused by a major obstruction, a dropped gate, a valve that is almost fully closed, or a check valve clapper stuck to the valve seat. A satisfactory main drain test (i.e., one that reflects the results of previous tests) does not necessarily indicate an unobstructed passage, nor does it prove that all valves in the upstream flow of water are fully opened. However, these tests provide a reasonable level of confidence that the water supply has not been compromised. Section 13.5.1.2 does require a full flow test shall be conducted on each pressure-reducing valve at 5-year intervals and shall be compared to previous test results. The main drain should not be used for this purpose unless the main drain can flow the system demand. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ firesprinkler.org [http://r20.rs6.net/tn.jsp?e=001yGtUb-Wdd4tUhJ7D0S6PE_lfKzWzbJr7_XtYPBJHeAjtUPwB9WecUEojrbb9DNZRusIo1LkJbFJ87dYyuIzWq1m65W_fY1c3DH1EhkirFJM=] Hosted by the American Fire Sprinkler Association ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Technical Update is prepared by the Technical Services Dept. of the AFSA: Vice President of Engineering and Technical Services Roland Huggins, a PE registered in fire protection engineering; Phill Brown, a NICET IV certified automatic sprinkler technician and NFPA Certified Fire Protection Specialist (CFPS) and Tom Wellen, a PE registered in fire protection engineering. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the NFPA or its technical committees. Copyright 2014, American Fire Sprinkler Association. All Rights Reserved ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PDF Version PDF Link [http://r20.rs6.net/tn.jsp?e=001yGtUb-Wdd4tUhJ7D0S6PE_lfKzWzbJr7_XtYPBJHeAjtUPwB9WecUEojrbb9DNZRuHt8fCOssYj0xI2jRg6F0FnTBbwZ9fpMfWDeXklTUHMd6huJnmn9LYsFXNKIhCQc3FDNNHdaB8YEvpDffilk8xeX3XjwT7e3Nd_09mJs-IS69sU-b52nQoJQzUhrmjokRZZMCOPLW-o=] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Training Calendar AFSA Beginning Fire Sprinkler System Planning School Register for Sept. 8 - 19, 2014 July 14 - 25, 2014 SOLD OUT! Check our calendar to view upcoming training. For details and/or to register, visit the AFSA Calendar [http://r20.rs6.net/tn.jsp?e=001yGtUb-Wdd4tUhJ7D0S6PE_lfKzWzbJr7_XtYPBJHeAjtUPwB9WecUEojrbb9DNZRusIo1LkJbFKgeeUFoEMLA3WnBVRacJcWziwOwwtUimT-xiZ1Mk85JUIbDx2F5cOH4Zbt0SAqDWE5fHb2eIWXxjkU3vekGxR6JiltjDVzYphD6eNUTgHRNJfEZCY5dNjU323G0rsME6X_9kip9a67O7sz8avRO8JINfMQDbTVn-IstAAxOs6NOLNlntFE70o_ot1W1VTaq9idtspUaIxPOg==]. e-campus_logo [http://r20.rs6.net/tn.jsp?e=001yGtUb-Wdd4tUhJ7D0S6PE_lfKzWzbJr7_XtYPBJHeAjtUPwB9WecUEojrbb9DNZRusIo1LkJbFJUBjYdv3Pu75liMVq7L6wc3EF1GmysoH3Ew38dI1xL6w==] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AFSA Webinar NFPA 25, 2014 Edition by Russ Leavitt June 19, 2014 This webinar examines not only the significant revisions that occurred and the reasoning behind the changes, but also proposals that were rejected by the Technical Committee. Cost is FREE for AFSA members. Register Button [http://r20.rs6.net/tn.jsp?e=001yGtUb-Wdd4tUhJ7D0S6PE_lfKzWzbJr7_XtYPBJHeAjtUPwB9WecUEojrbb9DNZRusIo1LkJbFJ87dYyuIzWq1m65W_fY1c3uG14u2Npx8sR8PhVZbj9FkMowz6MOKJqun52ETNnQR5-45zHvrVx6evP6pZ4vy4V] This seminar offers 1.5 CPD and 0.15 CEU.* (*Note: There is a fee of $15 to acquire the CEU credits. The webinar/content is being given free, but the CEUs will have a fee.) Check our calendar to view upcoming training. 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