Food for thought... https://www.eng-tips.com/viewthread.cfm?qid=351636
On Mon, Feb 28, 2022 at 8:30 AM Fpdcdesign via Sprinklerforum < sprinklerforum@lists.firesprinkler.org> wrote: > > > > The last dielectric joint I saw was a 9” piece of CPVC > > > > > > > > > > > > > > On Feb 28, 2022 at 11:22 AM, <Ryan via Sprinklerforum Hinson (mailto: > sprinklerforum@lists.firesprinkler.org)> wrote: > > > > > > > > Craig, From literature I have, SS has an anodic index of approximately > 0.60 V while plain CS has that of 0.85 V. If the environment in which the > joint is located is 'normal' or 'controlled', you shouldn't have a galvanic > compatibility issue. If the environment is considered 'harsh', the anodic > index delta must be smaller (approximately 0.15 V) in which case, some sort > of dielectric fitting/sacrificial anode would be needed for joint > longevity. As I am not an expert, I suggest reaching out to someone such as > www.corrosion-doctors.org for more assistance. Hope this helps, Ryan L. > Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O > 612-900-3755 \ M 763-688-4045 \ F 952-229-2923 rhin...@burnsmcd.com \ > burnsmcd.com 8201 Norman Center Drive, Suite 500 \ Minneapolis-St. Paul, > MN 55437 *Registered in: AK, LA, MD, MN, PA, TX, & UT **NICET IV - > Water-Based Systems Layout -----Original Message----- From: Sprinklerforum > <sprinklerforum-boun...@lists.firesprinkler.org> On Behalf Of Prahl, > Craig/GVL via Sprinklerforum Sent: Monday, February 28, 2022 10:06 AM To: > sprinklerforum@lists.firesprinkler.org Cc: Prahl, Craig/GVL < > craig.pr...@jacobs.com> Subject: Joining black carbon steel with > stainless steel piping I've got a engineer asking about the joining of > grooved stainless to grooved black carbon steel and if there needs to be a > special dielectric or similar type of assembly used to join the two? I've > been hunting on the interwebs and haven't found any type of special > coupling or should the connection be flanged? In all my years this is the > first time this subject has ever come up. Craig Prahl | Jacobs | Group > Lead/SME - Fire Protection | craig.pr...@jacobs.com | > https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jacobs.com%2F&data=04%7C01%7Crhinson%40burnsmcd.com%7C2d6969ca91d4441ae22908d9fad44781%7Cbfbb9a2b6d994e78b3c795005d555c8b%7C0%7C0%7C637816612359587927%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=ln%2Ffq9qqoz%2FALwILLnsYh4I62399EES0Jp16yw6U%2FvU%3D&reserved=0 > 1041 East Butler Road Greenville, South Carolina 29606 CONTACT BY: email or > MS TEAMS ________________________________ NOTICE - This communication may > contain confidential and privileged information that is for the sole use of > the intended recipient. Any viewing, copying or distribution of, or > reliance on this message by unintended recipients is strictly prohibited. > If you have received this message in error, please notify us immediately by > replying to the message and deleting it from your computer. > _______________________________________________ Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org&data=04%7C01%7Crhinson%40burnsmcd.com%7C2d6969ca91d4441ae22908d9fad44781%7Cbfbb9a2b6d994e78b3c795005d555c8b%7C0%7C0%7C637816612359587927%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=1HZ7rCOBMvIGnkxdF6EcTJYOIGN1cnyC8cQHktVKb4c%3D&reserved=0 > _______________________________________________ Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > > > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
