Great find. Thanks for the information From: Sprinklerforum <[email protected]> On Behalf Of Hinson, Ryan Sent: Friday, August 10, 2018 2:52 PM To: [email protected] Subject: RE: Reaming of pipe
Upon review of the 2016 Handbook, Section 6.5.6.1 and commentary state the following: 6.5.6 End Treatment. 6.5.6.1 After cutting, pipe ends shall have burrs and fins removed. Commentary: Pipe must be reamed to remove burrs and fins to minimize the reduction of the inside diameter of the pipe and to remove any rough edges from the end of the pipe. Thin fins that occur after cutting are susceptible to corrosion and can dislodge, causing obstructions in the waterway. The removal of irregular edges is particularly important when the fitting utilized has internal gaskets. The word ‘ream’ as pertains to pipe preparation, is not found in the standard and I missed this section initially. Thanks for the feedback, Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 [email protected]<mailto:[email protected]> \ burnsmcd.com<http://www.burnsmcd.com/> 8201 Norman Center Drive, Suite 300 \ Bloomington, MN 55437 *Registered in: LA, MD, MN, PA, TX, & UT **NICET IV - Water-Based Systems Layout From: Sprinklerforum <[email protected]<mailto:[email protected]>> On Behalf Of Mike Stossel Sent: Friday, August 10, 2018 3:20 PM To: [email protected]<mailto:[email protected]> Subject: RE: Reaming of pipe According to NFPA 13 it is to minimize the reduction of the inside diameter and pieces dislodging and causing obstructions. Mike Stossel SET [400dpiLogoCropped] 36 Barren Road East Stroudsburg, PA 18302 Office: 973-670-2627 [email protected]<mailto:[email protected]> From: Sprinklerforum <[email protected]<mailto:[email protected]>> On Behalf Of Hinson, Ryan Sent: Thursday, August 9, 2018 8:46 PM To: [email protected]<mailto:[email protected]> Cc: Schoenecker, Anthony (Tony) <[email protected]<mailto:[email protected]>> Subject: Reaming of pipe What is the forum consensus on why threaded sprinkler piping is reamed. I always did it as a fitter. We have always required it in our specifications. I have never really thought about the ‘why’ though. Is it as simple as removing the burr created when the pipe is cut and any potential ‘Klingons’ that might get sent downstream to a discharge device OR is this the proverbial “It’s always been done this way”? The excerpts included below are what I could find on it with bolding added by me. I’m not seeing where reaming is necessary for sprinkler piping. NFPA 13 (2016) Section 6.5.1.1 states: All threaded pipe and fittings shall have threads cut to ASME B1.20.1, Pipe Threads, General Purpose (Inch). ASTM A135-09 Section 13 – Workmanship, Finish, and Appearance, states the following: 13.2.3 Ends, Threaded Pipe—Each end of threaded pipe shall be reamed to remove all burrs. All threads shall be in accordance with the American National Standard Pipe Threads (Note 6) and cut so as to make a tight joint when the pipe is tested at the mill to the specified internal hydrostatic pressure… NOTE 6—A complete description of the American National Standard Pipe Threads applicable to pipe, valves, and fittings is contained in ASME B1.20.1... ASTM A53-10 Section 11 – End Finish: 11.2 If ordered with threaded ends, the pipe ends shall be provided with a thread in accordance with the gaging practice and tolerances of ANSI B1.20.1… Reaming is not mentioned. ASME B1.20.1-13 – Pipe Threads, General Purpose (Inch), does not mention reaming pipe. Figure 3 and Table 2 do not show a reamed edge of the male end of the threaded pipe. The following are the only ASTM or ASME pipe standard references I can find requiring reaming of pipe: ASTM B0828-16 – Standard Practice for Making Capillary Joints by Soldering of Copper and Copper Alloy Tubing: 6.2 Reaming: 6.2.1 Ream all cut tube ends to the full inside diameter of the tube to remove the small burr created by the cutting operation. Failure to remove this rough edge by reaming is a leading cause of erosion-corrosion that occurs as a result of local turbulence and increased local flow velocity in the tube. A properly reamed piece of tube provides a smooth surface for better flow. ASTM A589-06(12) – Standard Specification for Seamless and Welded Carbon Steel Water-Well Pipe – This does not apply. Thoughts? Ryan L. 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