RE: Joining black carbon steel with stainless steel piping

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

RE: 8 inch sprinkler pipe fall from factory ceiling

Gary, Some initial questions that come to my mind follow: 1. What was the size of the main? 2. What was the spacing of hangers? 3. Were all roll grooves of proper depth? 4. Was there any structural movement before or during this recorded event? 5. Was the hanger failure

RE: Thread connection holding on one thread only

I seem to recall single thread calculations back in college, however, I could not find anything other than what is in ASME B.1-20-1 (2013) - Pipe threads, General Purpose. Among other things, this standard discusses 'hand-tight engagement', 'wrench makeup length', effective thread length', and

RE: Best Common Practices

In my experience, it boils down to whether you need relatively few trapezes for your XMs and/or BRs as opposed to greater potential numbers of trapezed BLs. Certainly, each design is likely going to be unique; pipe size/schedule-dependent; and roof structure: direction-, member max-loading-,

SR EC OH fusible-link SDWL

Happy Monday, Does a standard response, extended coverage, fusible-link, sidewall sprinkler exist which is listed for ordinary hazard occupancies? Thanks, Ryan L. Hinson, PE*, SET**  \  Burns & McDonnell Senior Fire Protection Engineer, Fire Protection Engineering Group O 612-900-3755 \  M

RE: Mixing of K-Factors in self-storage facilities

...and response time within the compartment is the same per NFPA 13 (2019) Section 9.4.3.3 and as otherwise stipulated in specific chapters. 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  \ 

RE: Seismic joint detail

While I see allowable offsetting in all directions via rotation within those couplings necessary, it would appear that before some couplings will rotate, a moment arm must be created into which the strain can be transferred or it may manifest itself into a coupling in a prying fashion

RE: [EXTERNAL] Re: Stub-up Material

I agree with others' assertions here that this is poor design. I have further taken NFPA 24 (2019) Section 10.1.4's specific wording to mean that this nonmetallic stub is only allowable INSIDE a building. If the manufacturer says no, so do I in this regard. I have also received photos from

RE: Dry head boot retrofit

https://www.tyco-fire.com/index.php?P=detailprod=5910 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

RE: Dry head boot retrofit

I think you are thinking of the Tyco DSB-2 Sprinkler boot which included one boot, two strap ties, and 1/3 oz. of adhesive. This component is/was found on Tyco's Dry Sprinkler cuts...at least on the old cutsheets TFP500 and TFP550. Not sure if it is still available. Ryan L. Hinson, PE*,

Re: [EXTERNAL] Re: Available Pressure from Fire Water Storage Tank

Don’t forget that, along with your pump(s) churn, the high water level in the tank must be used to determine maximum downstream system pressure. Sent from my iPhone > On May 7, 2021, at 4:06 PM, Mark.Phelps via Sprinklerforum > wrote: > > So, if this same tank and pump were at the same

RE: Same size orifice in a room

Same orifice, no. Limits on orifice, yes...in several places such as NFPA 13 (2019) Sections 9.4.4, Chapter 21, Chapter 25, Section 27.2.4.9.2, or word search 'factor'. Same response time per compartment, yes per Section 9.4.3.2. Ryan L. Hinson, PE*, SET**  \  Burns & McDonnell Senior Fire

RE: Does a remote free standing FDC require a valve pit?

Ball drip is required at the lowpoint of the upstream piping of FDC checks per NFPA 13 (2019) Sections 16.12.1, 16.12.7, and Figure 16.12.1 (in areas subject to freezing...TX) unless an FDC is not required per Section 16.12.2. (Here it is called out as an automatic drip) It should be noted

RE: potential freezing in ESFR system

Hopefully, your sprinklers are not already installed. Ryan L. Hinson, PE*, SET**  \  Burns & McDonnell Senior Fire Protection Engineer O 612-900-3755 NEW \ M 763-688-4045 \  F 952-229-2923 rhin...@burnsmcd.com  \  burnsmcd.com 8201 Norman Center Drive, Suite 500  \  Minneapolis-St. Paul, MN

Lonergan Fire Pump Pressure Relief Valve

Does anyone out there have a cutsheet for the J.E. Lonergan Model HU FM Approved Fire Pump Relief Valve from circa 1970? I have one needing reorientation due to revising relief piping and am looking for allowable installation orientation. Not finding anything online. Ryan L. Hinson, PE*,

RE: Domestic Demands 13R

Perhaps my response appeared to imply the 2500 gpm demand would be required. It did not. I was merely inferring that consideration of additional domestic flow still needs consideration IMO. I agree with Ron that this would be a total fire (and domestic) flow determined by the water

RE: Domestic Demands 13R

Is this entire complex brand new or existing? Your answer will determine mine: 1. Taking a water flow test on an existing looped water main supplying both FW and domestic demands already accounts for the domestic demands of the other buildings, no? On the single main feeding all the way

RE: Obstruction Clarification

Since you are using EC heads, presumably you are protecting LH or OH areas wherein, if you were using standard uprights or pendents in the space, you could ignore minimum spacing from nonstructural members per Section 10.2.7.2.1.4. Ryan L. Hinson, PE*, SET**  \  Burns & McDonnell Senior Fire

RE: [EXTERNAL] Re: Submittal Packages

It's very difficult to efficiently review a project when submittals come in piecemeal. Inevitably, things get missed and resubmittals of such partial submittals only complicate matters. Though there are always exceptions, we require complete (re)submittals with shop drawings complying with

Code requiring inclusion of possible concurrent flow

We have run into a dock FW system design where multiple automatic flushing valves are being provided on the system to prevent freezing by automatically flowing water at temps below 40°F to the order of 300 gpm. Though this flow should absolutely be included in the system demand flow, I am

RE: Ethanol unloading exposure protection

Your scenario, which sounds like exposure protection, is likely not going to be achieved using closed sprinklers and should instead be using deluge. Why not provide a fixed water spray exposure system using open spray nozzles in accordance with NFPA 15, FM 4-1N,...or API RP 2030 Sections 7.2.2

RE: C-Clamp Hangers

Hanger attachments are being confused with bracing attachments. - NFPA 13 (2019) Section 18.5.11.10 explicitly DOES NOT allow C-clamps used for seismic bracing structural attachments with orwithout restraining straps unless specifically listed for such use. - Section 18.7.1

Re: [EXTERNAL] RE: Floor area less than required

I would caution throwing all us engineers into the same stereotypical group...kind of like saying all Americans are racist. Sent from my iPhone On Jun 17, 2020, at 8:35 AM, Dennis Wilson via Sprinklerforum wrote:  Don’t you just love them engineers!!! From: Sprinklerforum On Behalf Of

Re: Flammable liquid tanks in a garage

Is NFPA 37 applicable? Sent from my iPhone On Feb 26, 2020, at 5:24 AM, Fpdcdesign via Sprinklerforum wrote:  Could you give a few more details? What is in the tanks? Why are they there? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-554-7054

NFPA 14 Air supervision requirement

Got a question with the 'apparently' all-encompassing dry standpipe air supervision requirement of NFPA 14 Section 6.1.1?: * 2013: [cid:image009.png@01D5D2C2.A4A39510] * 2016: [cid:image008.png@01D5D2C2.2A144EC0] * 2019: [cid:image010.png@01D5D2C3.2F6A77E0] Since it's illogical

RE: Looking for a 6" hanger for sloped roof

Assuming you have done your homework regarding whether and at what hanger spacing the structure can support the weight of the water-filled pipe in accordance with NFPA 13; in my experience, one still cannot hang from the bottom lip of exposed Z-purlins and must instead hang with something like

RE: Table 22.4.2.1 NFPA 30

Tim, Keep in mind the fact that each pair of tanks is independently evaluated for spacing purposes per the note at the bottom of NFPA 30 (2015) Table 22.4.2.1 as further explained in Section A.22.4.2.1 and that there are exceptions in the subsequent subsections. There are other documents out

RE: [EXTERNAL] Trying to determine hydrant locations per IFC, wondering how sprinkler coverage omissions will affect distances.

James, From IBC 2018 commentary: Section 202 DEFINITIONS [F] AUTOMATIC SPRINKLER SYSTEM. An automatic sprinkler system, for fire protection purposes, is an integrated system of underground and overhead piping designed in accordance with fire protection engineering standards. The system

RE: [EXTERNAL] FW: Dry Pipe Valve to Wet

IFC 2012 Section 901.4.5 Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 rhin...@burnsmcd.com \ burnsmcd.com 8201 Norman Center Drive, Suite 300 \

RE: 30' diameter and 30' high storage tank

Tim, All manufacturers' cutsheets I've used walk you through how to determine this. In addition to the axial distance, the spray profile for your proposed nozzle needs to be known (typically shown on the cutsheets), as well as the nozzle's fixed angle of orientation. Dependent upon these

RE: 30' diameter and 30' high storage tank

Keep in mind that 12 ft is the maximum distance measured along the surface of the protected asset per NFPA 15. "Net rate" in NFPA 15 (2017) Section 7.4.2.1 means that one has to include necessary flow to achieve an overall average of 0.25 gpm/sq ft of all exposed vessel surface. If your