Sizing Natural Gas and LP Propane Gas Pipe- Longest Length Method! IFGC 2015

In this HVAC Gas Line video, I show you how to Size Natural Gas and Propane Pipes using the IFGC 2015 to determine the minimum pipe size diameter for an entire building worth of gas lines. I go over why we use the procedures and methods shown in the video. I show you how to determine the correct sizing chart for the application as there are many charts to choose from in the International Fuel Gas Code Book. The equivalent length of all fittings more than four total must also be used as well when determining the longest length of the piping section. Supervision is needed by a licensed HVAC Tech before doing this as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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[@acservicetechchannel]

Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Linked Below) Here is the link to the Fieldpiece SDMN6 Dual Pressure Testing Manometer with Pump-amzn.to/2jyK5Ka Here is a link to the UEI DL389 Multimeter used in the videos- amzn.to/2av8s3q Here is a link for the Supco Magnet Jumpers amzn.to/2gS4h6z Here is the link for the Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V Other tool links can be found in the video description section. ACSERVICETECH is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.

[@400hpmustang]

It all came together after watching this video. This helps tremendously, taking my G2 exam soon, thanks AC service tech llc.

[@SpartanIV]

This is hands down the best NG pipe sizing video I've seen. Thank you! I'm going to use this knowledge to back into what my 1950 house is setup to supply to see if I can add an outdoor branch for a firepit at an unused tee.

[@number1jensenfamily]

Extremely helpful,taking P2 test next week and even though I've got 20 years in the plumbing field but I've never ran any gas. You've made this method very clear, much appreciated!!

[@acservicetechchannel]

Thanks Gary!

[@jasonbarrows8386]

Man. Thank you for making this video. You did a great job at explaining this in a way that is easily understood.

[@justincanterbury2561]

Thanks a lot man just scheduled the HVAC contractors exam for next month. This helped me understand that part!

[@neildecker1]

Thanks for this video. You made it so simple, I finally understand how the Longest Length Method works.

[@acservicetechchannel]

That's awesome to hear Neil!

[@wohnelimedia9634]

Thanks so much for this refresher. I drew your diagram and went and sized the piping using the 2020 Minnesota fuel code book and everything was perfectly matching your method and answers. I appreciate your video.

[@justinkendollrozinek]

I love your way of completely dummy proof it by lettering each section and and laying out the needs of each.

[@acservicetechchannel]

Thanks and the newer videos have much better audio, thanks!

[@FancyBarnacles]

great video, very easy to understand. thank you for explaining!

[@edisone690]

thanks man i need a refresher before my test this was great

[@acservicetechchannel]

Best of luck!

[@eulaliorodriguez5325]

Thank you for sharing this information.

[@jimmyung3212]

Thank you this one going to take me sometime to learn!!!

[@acservicetechchannel]

Yeah that is like a 3 day course condensed into 10 minutes, ha! Stay with it and this one will definitely take a while but is crucial to techs.

[@geojor]

always informative, thank you ...

[@acservicetechchannel]

Thank you very much!

[@timschmidt9456]

Thank you! An excellent explanation for a novice..

[@acservicetechchannel]

Thanks a lot Tim!

[@Holler_Rat]

Nicely done, thank you!

[@acservicetechchannel]

Thanks James!

[@meerscan9101]

another a1 quality video!

[@acservicetechchannel]

Thanks refrigeration tech!

[@whitesheatingairappliancer7101]

Thank you for the video.

[@acservicetechchannel]

Thanks Ron White!

[@charlesking678]

Damn good video bro!

[@timmoline2190]

Great explanation 👍

[@jimbola77]

thank you for sharing!!!

[@acservicetechchannel]

Thanks jimbola77, does that make sense? It will probably take a while to understand that one fully but just wanted to see what you thought?

[@HieuPham-gg9uj]

Great video thank you

[@acservicetechchannel]

Thnaks Hieu Pham!

[@bigtoe4411]

Well done ,and easy to understand. Ty

[@acservicetechchannel]

Glad it was helpful!

[@NukeJesus]

Thank you!!!

[@acservicetechchannel]

Equivalent length of all fittings more than four total must also be used as well when determining the longest length of the piping section.

[@supersage789]

thank you

[@tyl8ter]

Question? If i Have a 410 CFH gas meter does that mean 410,000 btu/h available? I want to be clear on the source also....Thank you

[@ericstyer2890]

Well done

[@acservicetechchannel]

thank you

[@vickyr8360]

I have a situation, my new firepit requires 240k and it is 60’ away from meter. The current pipe line is as follows-from gas meter 1” pipe size for 50’ distance and then branch out for 1/2” size for next 10’ distance to fire pit.Does this current pipe system would be good enough for 240k btu firepit?

[@PROSDIY]

Awesome job! I'm making a BBQ gas line video and was going to explain gas line sizing in the the video. I can't explain it any better than you just did. Do you mind If I link to your video from mine? Thanks again for such a well made video!

[@acservicetechchannel]

That sounds good with me. If you would like to chat, email me at [e-mail] thanks. I checked out your channel and website, Nice!

[@nickgucciardi7143]

What if you were to add gastite instead of hard pipe? Let's say for the d branch?

[@anthonylovato8132]

Great detailed lesson. Got one question though. Say existing home has 1" black iron ran for 100'. And i branch off for a new gas stove but use copper instead. Will i use same sizing chart for the black iron or switch charts just for that one run?

[@acservicetechchannel]

You would use the copper sizing chart found in the ifgc 2015, thanks

[@erikrezlman7900]

Hey Craig, I’ve been following you for better than a year. I’m getting into the HVAC industry and have passed the 608 EPA certification. I am currently reading and finishing up the IFGC code training manual for black pipe cert. My question to you is, what is the best black pipe pocket size code book available for helping me with codes for passing the black pipe test and for use later in the field? I’ve Googled for the best type black pipe code book, but have not been successful with finding a small pocket size manual. Thanks for all your content on KZbin and products you offer for training and for use in the field.

[@acservicetechchannel]

Jack honestly I don't think there is one out there. I would just read and reread through the sections on schedule 40 pipe and supporting, pressure testing and run yourself through sizing exercises, thanks!

[@korgothkillings2032]

Nice thanks

[@acservicetechchannel]

No problem

[@mattmas8640]

Question for you. I have 70’ for my furthest distance. However, I want to install a 199,000 tankless water heater. The tankless water heater only has 3/4” connections. Using the chart, 3/4 is not supposed to be utilized even in a branch off of a 1-1/4 just to supply the water heater. The chart would state that I would need a 1” connection to the water heater. How do you get around this to meet code? Do you just reduce down to 3/4” close to the water heater?

[@dennisnoone7427]

very informative, how does it work with a manifold? thanks

[@acservicetechchannel]

The same way. You would take the longest measurement from the source and to the longest run off of the manifold. You would take that length measurement and use it each time, thanks

[@GaPodrinho]

What if I need a pipe size larger than the maximum displayed on Schedule 40 mtallic pipe schedule?

[@erow1730]

I have a furnace that needs 8,000,000 BTU and its 800' from the meter, i have 10 psi what size pipe do i need ( HDPE )

[@poulmack]

Hi, It's a great video. Is there a maximum length considered between the branch and appliance? It's because you don't consider that value in the longest length.

[@acservicetechchannel]

Thats correct, it is whatever is the longest of the lengths, thanks!

[@crislim2749]

Can i Use this on LPG ?? thank you

[@abdullahisalat4478]

When is the only time you change the LMR for code zone?

[@seanmcdermott416]

Hey A.C do you have a refrigerant line sizing video . As I am not yet in an 313 A or D course here in Canada so I would not have the code book. However I have a gas filter 1 certification.

[@acservicetechchannel]

I have not built one yet but would like to at some point. This is the closest I have so far, thanks- kzbin.info/www/bejne/lWnKZ6uXeLB3p8U

[@juangarcia931]

How do I know which letters to use to add to get the longest length?

[@jhuff692]

I'm not an HVAC student or mechanic but I'm interested in learning about the refrigeration process: 1. Is the low internal pressure of an evaporator equal to atmospheric pressure or does it vary? 2. Do refrigerants achieve their listed boiling points once they have passed through the metering device? (ex: does R134a really get down to -15.34°F)

[@hvacgameproper1177]

No It's actually significantly higher.

[@outlawgentleman8860]

Refrigeration/R134a are completely different from Natural gas a propane gas. Dont cross the info of them at all ever. You'll end up blowing something up.

[@hvacgabe5889]

my question is are you going to use 1.5 pipe and use .5 on the first appliance then .75 on the other appliances.?

[@acservicetechchannel]

Yes except for D 199,000 which was 1 1/4". Thanks Gabriel Brown!

[@neckofthewoods24]

Do you do the longest run or to the end of the a main branch as the longest run? Meaning you have a main branch that’s 10’ long, but off the main branch you need gas all the way over to some unit that’s 50’ long. Is it then 50’ or 10’ for the main branch?

[@goaliebrody]

Longest measured run would be from where the line comes out from the meter to the furthest appliance. So in this case it would be 50 ft

[@neckofthewoods24]

@@goaliebrody but what if it’s such a small device only 3/8” line, low BTU? It’s not like it can steal that much from the last unit on the main line that’s demanding a large amount of btu. Just to explain, I have LP, 10’ main line 3/4” with 11 in w/c reg at the house. Online that says the main line can support 608,000btu. Off that main line I think I can run a 3/8 maybe 1/2 line over to a fire place that’s maybe 50’ away that demands only 28,000btu. Sounds weird to make the system so large in pipe size when that long run is so small. If at the end of the 50’ I had a 200,000 boiler then yeah I’d get that.

[@tyl8ter]

How come we don't add the 70 (a)( 35 ft) and the 45 ( b)( 15 ft)?.,..

[@MR-nl8xr]

👏🏼

[@acservicetechchannel]

Thanks a lot Max R!

[@joebrewer5885]

How is "pressure drop" determined? Does the gas supplier give you that info? How do you get that figure?

[@acservicetechchannel]

Usually low pressure nat gas is .5, commercial nat gas .3, commercial and res lp .5 but you can check with your local inspection office, thanks!

[@ryanracicot8234]

@@acservicetechchannel if you were to have the gas company up your meter pressure to 11" wc would that increase your pressure drop to around 3" wc and move you over to table 402.4(3)? Or would you have to measure the pressure drop yourself after the meter and find the correct table?

[@ZayanasLittleLion]

If I am sizing by branch length method or longest length method, don't I have to include the fittings(bends and elbows?.... Every practical example has these fittings.

[@acservicetechchannel]

You do unless you have 4 fittings or less, This is an intro to the topic, thanks!

[@ZayanasLittleLion]

How many ft of length should I add up to the total length ? If I have like 8 -90 degree bends and 2 Tees ? How much length should I add ? There is a table in the IFGC which says around 10 feet of length for tees , but that will increase my total length by almost 100-150 ft ...is it correct ?

[@acservicetechchannel]

Table A.2.2. at codes.iccsafe.org/content/IFGC2015/appendix-a-ifgs-sizing-and-capacities-of-gas-piping It depends on what size those tees are and yes to have 100 extra feet due to fittings is a normal thing. Are you working with 2" schedule 40 because you said 10' per tee?

[@moseslmps6261]

what if its mroe than 200 feet

[@deuce2driver]

I still don't understand this.

[@FaithisKey792]

You lost me at around 9 mins. I have only gotten 3 hours of sleep so far and it’s 4:26 am. To be continue. I must get this. 🙏God bless you 🥱. I only have one appliance. I just have to tap from the fireplace, I think. My wife wants a gas stove but what we have installed currently is an electric one with no gas line in site.

[@thomcf5130]

One thing that makes 0 sense about this method, unless I'm interpreting it wrong, is that let's say you design an entire building with this method, and your longest length is 100 feet. So each appliance is sized with the 100 feet and according to their required capacity. Fine all good. BUT, the day you add a small extension and need to add another appliance which is 120 feet from the meter, what then? Or say, to make sure we don't get the conclusion that line diameters won't be changed given the small increase, that the newest longest length, after the addition of the extension is 300 feet. Now all of a sudden you need to replace the piping in the entire building, because capacities were initially designed with 100 feet only? Am I the only one thinking that makes no sense?

[@jtmcfarland3512]

May be most conservative and easiest way, but it’s less accurate (engineering wise) and costs more in materials.

[@usaacpatriots712]

Ti begin eith you dont specify natural or proplane ..

[@tyl8ter]

got it...sorry

[@stormbytes]

Explanation is good. The highlighting is terrible and very difficult to follow!