We frequently thread up to 2" for ease of field modification. We have also had quality challenges with 1 ¼" welding. Pipe that small can get warped by the heat of welding.
Matt From: Sprinklerforum [mailto:[email protected]] On Behalf Of Nick Maneen Sent: Monday, November 20, 2017 2:21 PM To: [email protected] Subject: RE: 1" grooved pipe and couplings and 2" and below grooved pipe #1 - 1" grooved in the past has never made sense financially. Most fitters can pull 1" in just as fast as they can put a coupling together. Plus, modifications are easy to make to 1" threaded pipe. I am aware of the manufacturer who is offering 1" grooved as a companion with their flex drops and it is interesting but I'm not sure it is cost effective yet. I don't see a reason to restrict its use but I'm not using it until it has been on the market for a while longer. #2 - I will groove 1 ¼" depending on the situation and groove 1 ½" regularly. It think the spec comes from the same place that still calls for OS&Y valves, alarm valves and water motor gongs. That's the way we've done it so that's the way we'll do it. It made sense in the pipe schedule days to spec what the contractor was doing anyway but doesn't any longer. Good luck with your updates. Nick Maneen, SET c 704.791.7789 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Prahl, Craig/GVL Sent: Monday, November 20, 2017 2:54 PM To: [email protected]<mailto:[email protected]> Subject: 1" grooved pipe and couplings and 2" and below grooved pipe I'm wondering what the consensus is amongst the group here on a couple issues as I look towards making some updates to our project specifications. #1, the use of 1" grooved pipe and fittings versus threaded. This would be using Sch. 40 pipe. I saw a presentation which if I were still a contractor would definitely make me take a good hard look at utilizing this technology. Do you use this or are contemplating using it? #2, the use of grooved pipe and fitting on pipe below 2" in diameter. Seems like the typical spec lists grooved for pipe above 2" but threaded below 2". Why? Why not grooved pipe below 2"? I would appreciate some thoughts and incite from those in the field. Thanks, Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected]<mailto:[email protected]>
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