How To Get A Natural Gas Line Installed

Gas Piping Specifications

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LP or Propane Gas Pressures & Natural Gas Pressure questions & answers:

Questions, answers, FAQs virtually the common operating pressures of natural gas and LP or liquid petroleum gas at the gas regulators, in building gas pipage and at gas appliances.

This article serial gives the standard pressure ranges and pressure level settings for LP gas, propane gas, and natural gas fuels, including pressures found in the distribution service piping, in the in-edifice gas piping, and at gas fired appliances such equally gas stoves, clothes dryers, furnaces, boilers, and LP gas or natural gas fired water heaters. Since at that place several means that people express gas pressures we include more than than on clarification of common LP gas or natural gas system operating pressures in this article.

We also provide an Article Index for this topic, or you can try the folio peak or lesser SEARCH BOX as a quick way to notice data yous need.

Gas Pipe Materials, Sizes, Codes, Specifications for LP or Natural Gas in Residential Systems

Question: James Westward. Howe on Size of Gas Piping Required

2016/09/26 James w Howe Jr said:

I was taught to E'er use copper flex with LP gas and black pipe with NG. I'm am Non talking virtually pressure here! That stated, my supply is two 100 lb tanks with an "automatic switch over valve". The lines from the tanks to the valve are 1/8th inch.

I need to feed a 30 inch 5 burner gas stove with a convection oven, a gas apparel dryer and a tankless 10L water heater that has a one/2 inch gas inlet. Instead of running 1/2 inch copper flex with Ts to each apparatus, do i need to increase the volume in the organisation to accept enough gas to feed all three appliances.

If I was using NG, i'd install at least a ten foot piece of 1 1/iv black piping to build up the volume and then run one/2 inch Ts with 1/2 inch pipage to the appliances. With LP I'd utilise 3/eight copper flex for the dryer and stove and the one/2 inch chosen for for the h2o heater, BUT, I demand to get enough volume first so how should I proceed? All of the answers on your site deal with pressure and THAT is not the issue here!

Forgot my contact info: jwhowejr@centurylink.net

[Click to overstate whatsoever paradigm]

Reply:

Thanks for the comment and question, James, it helps u.s. realize where we demand to work on making our text more clear or more complete. A competent onsite inspection past an expert usually finds boosted clues that would permit a more accurate, complete, and authoritative answer than nosotros can give by electronic mail alone.

Yous will discover additional depth and detail in articles at our website. Run across the ARTICLE Index link at the terminate of this article for a library of data nearly LP and natural gas piping, installations, equipment, pressures, regulators, etc. That said I offer these comments.

There's quite a listing of types of pipage material approved for employ in gas pipage systems; the distinctions I take seen are well-nigh the application - location such as above or below ground rather than the fuel deviation between LP and NG; in that location accept been, historically, opinions about gas piping and corrosion differences between the sources (thence the history of "dirt legs" on NG pipage systems.

The list of gas pipage materials - office of your question, depending on where the pipe is used, includes aluminum (in some locations and never below basis), contumely (yellow - the one-time traditional gas pipage establish indoors in older buildings), copper blazon L or K rated for gas systems, iron (black ductile iron) above ground and possibly below ground in some jurisdictions, PE and PVC for outdoor hugger-mugger apply, and of course thinwall corrugated, coated flexible copper appliance connectors.

Picket out: Some jurisdictions such equally New York City specifically prohibit use of some pipe materials such as bandage iron, copper, brass, aluminum, and metallic tubing (with exceptions).

I haven't seen pipe approval distinctions based on fuel simply I recollect some opinions on that stem from differences in fuel moisture and contaminants, hence the "dirt leg" we see on older atomic number 26 gas pipage systems; I think that we don't come across galvanized atomic number 26 because corrosives in NG supplies may crusade coating loss and clogging; at the stop of the 24-hour interval information technology's the local plumbing inspector whose give-and-take is constabulary.

See NFPA #58 adopted by many jurisdictions permitting either blazon of steel pipage as long as it's certified to meet ASTM A53 steel piping standards;

Here's an excerpt example from a local city gas code pertaining to natural gas pipage. LPG regulations will sometimes differ.

New NG gas piping tin can be of Schedule xl steel pipe with threaded fittings, Type L rigid copper tubing with brazed fittings, Blazon L soft copper tubing with flared fittings, or flexible CSST (corrugated stainless steel tubing) with manufacturer provided fittings. - City of Brownton, MN 55312 www.cityofbrownton.com (exterior Minneapolis/St. Paul MN).

Bottom line: to comply with piping materials choices yous need to find out what local building or plumbing inspectors will have as rules vary by jurisdiction.

I hold that ane/8" bore is not likely to provide adequate flow rates to multiple appliances nor over altitude. Typically the plumber connecting multiple appliances uses a larger line to bring gas into the building.

Too see GAS PRESSURES LP vs NATURAL GAS - the domicile folio for this topic.

There we discuss gas pressure level drib in long runs or minor pipe sizes. Yous'll see that pressure and pipage size and delivery rates are connected. P1V1 = P2V2.

Even for short piping runs there are recommended minimum pipe diameters. None of them in current standards for gas piping is 1/8".

Gas tank switchover valves for multiple LP tank installations

For other readers, Automated or manual switchover valves: I'thousand indeed non sure that we're talking about the same device, nor that it has to do with gas piping size and pressure.

Switchover valves used, e.g. in Australia, Canada, the U.S., the U.K. and other countries switch between 2 LP tanks so that as fuel runs depression in one LP tank the homeowner can switch to the full tank. We besides call those also "changeover valves". A changeover valve is particularly useful when the empty LP tank is to exist physically swapped-out for a total ane.

Changeover valves are sold in both manual and automatic forms. Some changeover valves are combined with a gas regulator as shown in our photo above. Shown is a Winntec Model 6020 P1.0-15.six Q6.R280 LP gaws regulator and changeover valve combined. This changeover valve is sold at plumbing and heating suppliers and at some RV suppliers such as campingworld.com.

Reader follow-up: yous practise know what NPT stands for, right?

019/09/26
James Said:

Why do [-es anybody I ask] seem to have to always go back to talk about pressure. My run is only about x feet and so force per unit area IS Non an issue! I likewise accept to approximate that yous are completely unfamiliar with an automatic switch over valve. I realize that they are seldom used anymore, just if you lot don't have cognition of them, you should have passed the question to someone who does.

The last i knew, I live in the good 'ol USofA and in this country, nosotros have something chosen the National plumbing Code. Since I am not a licensed plumber, i do not have a re-create so asked a question of a website that I thought could give me a reasonable answer.

To my dismay that is Not the case. Thanks, only no cheers, i'll seek my answers elsewhere! By the way, the outlet on the automatic switch over valve is 1/2 inch NPT…you do know what NPT stands for, correct? jwh,jr

Moderator reply: please be careful about quick, shallow "answers" to questions involving life-safety

Of course pressure will be uniform throughout a system until appliances are using fuel. Then the pressure drib will depend on the length and size of piping. And utilise of a switchover or as we prefer changeover valve on LP tanks does non amend the requirements for gas pipage sizing based on the menses requirements.

Sorry that our initial reply was confusing for yous. Nosotros have readers in over 50 countries so we don't presume that we know where they live. "National Plumbing Code" itself is a standard that varies by country.

But in the U.S., the National Plumbing Lawmaking is not the best resources for answering your question. Instead yous'll want to see NFPA 54 that you can access for gratuitous, online. We include the necessary information to practise and so at the end of this article.

Sorry also to meet you so aggravated that your email digresses to insults. We try our best to serve millions of readers a month, finding information if nosotros don't already accept it, researching for authoritative, unbiased sources and eschewing arm-waving opinion.

Sometimes, depending on how your question has been worded, its length and content, nosotros may non correctly sympathise the central question.

We also understand the natural wish of a reader who says "never mind all that malarkey, only TELL ME THE Respond". Simply sometimes the questioner appears to the states to be facing life prophylactic hazards as well every bit building code and standard, permits, or licensing issues that nosotros recollect requires a scrap more information to come with a reasonable and prophylactic solution to a problem.

InspectAPedia is an independent publisher of edifice, ecology, and forensic inspection, diagnosis, and repair information provided free to the public - we take no business nor financial connection with any manufacturer or service provider discussed at our website.

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Watch out: It's more important to sympathise that likewise high or too low gas pressures are unsafe, risking not only appliance malfunction but fire or explosion or fatal carbon monoxide poisoning.

For this reason, nobody, even the most generous plumber, if she or he has an ounce of sense, is going pretend that she can tell someone exactly what kind and size of gas pipe is required for an installation near which she knows adjacent to zip.

The danger of giving a person of unknown preparation and skill "how to" advice is that there is most always ane or more important considerations that an on-site expert would notice just that are not offered by the person asking the question. When discussing fuel gas piping in that location's the ever nowadays chance that the reader later on blow himself upwardly or catches his edifice ablaze. That caveat fabricated nosotros continue to try to help you out:

Reader follow-up: so respond my question: how big should my gas pipes be? Do I need a manifold with multiple outlets?

016/09/27 James W. Howe Jr. said

Insults? I repeat my question: since there is only a half inch outlet on the switchover valve, should I apply black pipe with LP to increase the volume since even with the new products on the marketplace for LP, I haven't seen whatever that have a diameter larger than three quarters of an inch OR should I simply put a short manifold on the valve outlet with three half inch outlets on information technology and run three half inch lines, one to each appliance? jwh,jr

Moderator reply: excerpts on gas pipage diameter & length & BTUH or Cubic Feet per Hour Gas Supply for NG or LPG from model gas codes & resources

James:

Thanks for clarifying your question to focus on LP gas pipe size or diameter for a ten-pes length for an un-specified number of appliances or gas-fueled equipment.

Your original question mixed pipe type, pipage diameter, manifolds, fuels, tank changeover valves, and appliances of unknown input or BTUH requirements so nosotros were non sure what respond would be almost helpful.

Yous asserted that y'all're request just about pipe bore and you don't care virtually force per unit area, but information technology's of import to understand that information technology's inadequate piping size (or improper regulators or regulator settings) that would deliver inadequate gas pressure (or menstruum rate in CFM per minute) at 1 or more appliances.

Typically the plumber measures gas piping pressure get-go with all appliances off, and so with them on. If the pressure with all appliances using fuel falls below the required input pressure at the appliance regulators the plumber knows to choose among
increase pipe bore size or to go to a two stage regulator organisation. A two stage regulator system is not normally required in a typical dwelling gas piping installation.

You referred by email to defective a copy of a model plumbing lawmaking such every bit the U.S. National Plumbing Lawmaking

As you'll read CHAPTER 4, Gas Piping Installations, Section FGC 401, in the New York Urban center Gas Code, constitute at https://InspectAPedia.com/plumbing/NYC_Gas_Code_CH_4_Gas_Piping_Installations_2014.pdf - provided free at InspectApedia.com too as by New York City, or as you lot can read in what'due south the best resources about gas piping installation, the National Fuel Gas Code NFPA 54, proper sizing of gas piping cannot be decided by arm-waving, shouting, nor insult.

Rather one needs to do some simple arithmetic, looking at pipage lengths, diameters, fuel type, AND the input BTUH (or cubic feet of gas per hour) required the appliances on the gas pipage arrangement.

Lookout man out: beware of a elementary "just requite me the answer" demand for questions that are incomplete, for which a safe proper answer requires more information, and for which a hasty i-size-fits'all answer could kill you or others.

I can't answer your gas manifold question as that's a local plumbing determination based on space, convenience, and other factors suggested hither.

LP Gas Pipe Sizing Codes, Tables & Examples

• 3/8" OD Copper tubing 10 feet long tin can back up 49 KBTUH (Thousand BTUs/Hr) of gas menstruation or supply at 11 inches Westward.C. with a 0.5" Due west.C. pressure drop.

  Nosotros're using this pressure range as it's virtually mutual for household appliances only you will demand to check the specifications for your own appliances.

• 1/ii" OD Copper tubing 10 ft. long tin can support 110 KBTUH equally higher up
• 3/4" OD Copper tubing 10 ft. long can support 348 KBTUH equally higher up
• 1/2" iron pipe (of an canonical type) 10 ft. of length tin can deliver 291 KBTUH every bit above
• iii/4" fe pipe x ft. of length can deliver 608 KBTUH every bit above
• See additional gas pipe sizing tables and guidelines in the Codes and IO Manuals cited and provided below.

Note that these data points are for 11" W.C. gas line sizing & copper.

Different information than that given in the gas pipage sizing only above will exist obtained if you are designing a 2 psig gas line.

What'south the Departure between an xi" wc gas pipage system and a 2 psig gas pipe system?

11" wc is the most-common residential gas piping organization but some new installations are beingness installed using a 2psig gas pipage system. ("psig" refers to psi read on a pressure level gauge or "gauge pressure".

11" W.C. (Water Column) = 0.397 psig.

Formula to catechumen pressure P to psi: psi = P / 27.679904842545

Or for convenience one psi = 27.7 in W.C.

What's the difference between PSI, PSIA, and PSIG?

PSI = pounds per foursquare inch

PSIA = atmospheric pressure or pressure if measured compared to a pure vacuum. At ocean level atmospheric force per unit area is xiv.vii PSIA

PSIG = gauge pressure expressed in psi. Estimate force per unit area volition show 0 at ocean level. Since about building gas pressures are read using a pressure approximate it is proper to refer to psig or gauge pressure.

An example for 2psi piping systems is given below.

Maxitrol 325-serial 2 psig Gas Force per unit area Regulator GAS FLOW Rate from OPEN PIPE
Flow of Natural Gas Less Escape Book 3	Length of Service Pipage
	25 ft		50 ft		100 ft
	BTUs	CFH	BTUs	CFH	BTUs	CFH
3/iv" Iron Piping @ six" west.c.	600K	600	440K	440	315K	315
three/viii" OD Tubing @ 2 psi	210K	210	148	148	105K	105

Notes to the table above:

1. For Natural Gas Maxitrol assumes 1000 btus / cubic foot of gas - this allows translation of cu.ft. into BTUs
2. CFH = Cubic Anxiety per Hour
3. Less Escapement Book: Gas at six" w.c. escapes from a 3/4" pipe at about three times the rate of gas from a iii/ 8" OD tube at 2-psi. The nautical chart below shows flow comparisons at the belch end. From the standpoint of uncontrolled escape of gas within a building, the 2-psi system has less flow than the 6" westward.c. system.
4. ANSI Z21.lxxx is the ANSI standard for line pressure regulators, intended for awarding in natural gas piping systems and LP (propane). Maxitrol's 325 Series Fifty-models are CSA certified (Z21.80) for two-psi inlet pressure level, with the 7 to 11 (inches w.c. outlet) spring.
5. Source: MAXITROL two-psi GAS PIPING SYSTEMS 325 Series GAS REGULATORS for DOMESTIC GAS PIPING [PDF] (2005) Maxitrol Company 23555 Telegraph Rd., P.O. Box 2230 Southfield, MI 48037-2230 The statesA. www.maxitrol.com
6. Meet also GAS BTUH, CUBIC FEET & ENERGY
7. Run into likewise GAS PRESSURES LP vs NATURAL GAS

Gas Pipe Sizing Codes, Specifications, Resources

• NFPA 54, ANSI Z223.1, (2015) The gas piping tables in NFPA 54 include a reminder of allowances needed to account for bends, fittings, valves - effectively those increment the effective "length" of the pipe when figuring lengths and pipe size requirements. Like gas piping size charts are given by LP gas suppliers. This standard provides minimum safety requirements for the design and installation of fuel gas pipe systems in homes and other buildings.
  Every bit NFPA Explains NFPA 54 addresses the following:
  
  Requirements cover the installation and performance of fuel gas pipage systems, appliances, equipment, and related accessories, with rules for piping systems materials and components, piping arrangement testing and purging, combustion and ventilation air supply, and venting of gas-fired appliances and equipment.

  You can buy a copy of the National Fuel Gas Code from NFPA at http://www.nfpa.org/codes-and-standards/all-codes-and-standards/listing-of-codes-and-standards?mode=code&lawmaking=54

  NFPA also permits viewing of NFPA 54 online, free if volition take the time and problem to register with the clan. NFPA = the National Burn Protection Association, whom you can contact at
  NFPA
  1 Batterymarch Park
  Quincy, Massachusetts U.s. 02169-7471
  Telephone +1 800 344-3555 (U.S. & Canada) +1 617 770-3000 (International)

• APPENDIX A: SIZING & CAPACITIES of GAS Pipe [PDF] as adopted in the U.S. by Virginia's adoption of the the IFGS and the National Fuel Gas Code volition provide details of the information you demand for an actual, condom answer to your gas piping questions.
• RESIDENTIAL PROPANE INSTALLATION GUIDE - GAS PIPING MATERIALS [PDF] Minnesota Propane Gas Association, PO Box 220, Princeton MN 55371, Tel: 763-633-4271, Website: www.mnpropane.org retrived 2022/05/08, original source: www.lakesgas.com/images/2019/Residential-Propane-Guide.pdf is some other example that lists allowable gas pipe materials
• "LP GAS LINE SIZING CHARTS", [PDF] LP-Gas Equipment Inc. 881 Hersey St. St. Paul, Minnesota 55114 USA, Telephone (651) 646-1177 Minnesota: 800-652-9072 Out-of-Country: 800-328-9222 Eastward-mail: info[at]lp-gasequipment.com, retrieved 2022/09/27 original source: http://world wide web.lp-gasequipment.com/products/pdf/LPGas_Cat2010_p157-175.pdf In that location yous'll notice the following tables:
• Gas piping or tubing length vs. pipe size for 11" W.C. - gas line sizing chart for copper tubing & piping
• Gas pipe or tubing length vs. piping size for two PSIG - gas line sizing nautical chart for copper tubing & pipage
• Gas piping or tubing length vs. pipe size for 10 PSIG - gas line sizing chart for copper tubing & pipe
• Gas pipage or tubing length vs. pipe size for x PSIG - gas line sizing chart for polyethylene tubing
• Gas pipe or tubing length vs. pipe size for ten PSIG - gas line sizing chart for CSST corrugated stainless steel tubing (Also see GAS PIPING, FLEXIBLE CSST)
• Liquid flow gas supply sizing charts rated in gallons per hour vs length of pipe and pipe diameter
• Gas equipment orifice size (and drill size) vs. BTUH capacity at various pressures
• Other tables, charts, calculations useful to gas piping installers and technicians

• MAXITROL ii 1/2" GAS Apparatus REGULATOR 210G-2 i/two & 220 Serial INSTALLATION INSTRUCTIONS [PDF] upwardly to 26,000,000 BTU - (shown above) every bit offered by globalindustrial.com, retrieved 2022/02/09, original source: https://www.globalindustrial.com/

  Website Excerpt:
  The 210 Serial Is A Lock-Up Blazon Regulator And Compiles With Codes Using This Specification. The 210 Series Has Been Designed For Maximum Control Function In An Easy To Use Bundle. The Serial Is Intended For Use With Gas-Fired Boilers, Steam Generators, Industrial Furnaces, Ovens And Similar High Demand Equipment. The Balanced Valve Blueprint Eliminates The Inlet Pressure level Consequence Acting On The Valve. Regulating Stability Is Improved And Hunting Tendencies Reduced By The Utilize Of Dampening Mechanisms In Both The Breather Outlet And Sensing Tube. Y'all Get Precise Regulation Over A Wide Range Of Pressures And Period Rates With The 210 Series, Including A "Naught Governor" Awarding. Made in the USA.

• MAXITROL GAS REGULATORS Capacity CHARTS 210-serial [PDF] (2006) Maxitrol Visitor 23555 Telegraph Rd., P.O. Box 2230 Southfield, MI 48037-2230 U.s.A. world wide web.maxitrol.com and in Europe: Maxitrol Visitor 23555 Telegraph Rd., P.O. Box 2230 Southfield, MI 48037-2230 U.Due south.A. www.maxitrol.com - retrieved 2022/02/09, original source: industrialcontrolsonline.com

• SENSUS 243 GAS REGULATOR SPECIFICATIONS [PDF] (2013) Sensus Corp., 805 Freedom Boulevard, DuBois, PA 15801 Us Website: sensus.com/gas Tel: i-800-375-8875
• SENSUS 243 GAS REGULATOR IO MANUAL [PDF] Op. Cit. - Includes Chapters Tables for natural gas for this regulator model.

In that reference you will come across that for longer gas pipe runs, in excess of 100 anxiety, copper tubing in any size, 3/8" to 7/8" O.D. is not permitted and won't work.

Instance Natural Gas Piping Code Excerpts

Here are a few explanatory excerpts from New York Metropolis's natural gas piping code; we provided some LP gas piping length examples in an before answer. :

401.three [Natural Gas Piping ] Modifications to existing systems.

In modifying or calculation to existing pipe systems, sizes shall exist maintained in accordance with this chapter.

401.four [Natural Gas Pipe ] Boosted appliances.

Where an additional appliance is to be served, the existing piping shall be checked to determine if it has adequate capacity for all appliances served. If inadequate, the existing organisation shall exist enlarged equally required or separate piping of acceptable capacity shall be provided.

401.3 Modifications to existing [Natural Gas Piping ] systems.

In modifying or adding to existing pipe systems, sizes shall be maintained in accordance with this chapter.

401.four Boosted [Natural Gas Pipage ] appliances.

Where an additional appliance is to be served, the existing piping shall be checked to determine if information technology as adequate capacity for all appliances served.
If inadequate, the existing organization shall be enlarged as required or split piping of adequate capacity shall be provided.

402.3 [Natural Gas Piping ] Sizing.

Gas piping shall be sized in accordance with one of the following:

1.Piping sizing tables or sizing equations in accord with Section 402.4.

2.The sizing tables included in a listed piping system's manufacturer's installation instructions.

3.Other approved engineering methods.

four.Individual outlets to gas ranges shall not be less than ¾ inches (19 mm) NPS .

402.4 [Natural Gas Pipe ] Sizing tables and equations.

Where Tables 402.iv(1) through 402.four(v) are used to size pipage or tubing,
the piping length shall be adamant in accordance with Section 402.4.one, 402.iv.2 or 402.iv.3.

402.iv.1 Longest [Natural Gas Piping ] length method.

The pipage size of each section of gas piping shall exist determined using the longest length of pipage from the signal of
delivery to the most remote outlet and the load of the section

402.4.2 [Natural Gas Piping ] Branch length method.

Pipe shall be sized every bit follows:

1.Pipe size of each section of the longest pipe run from the point of delivery to the most remote outlet shall exist determined using the longest run of piping and the load of the department.

2.The pipe size of each section of branch piping non previously sized shall be determined using the length of piping from the signal of delivery to the most remote outlet in each co-operative and the load of the section.

402.iv.3 [Natural Gas Piping ] Hybrid pressure level.

The piping size for each section of college force per unit area gas pipage shall be determined using the longest length of pipe from the point of delivery to the near remote line pressure regulator. The pipe size from the line pressure regulator to each outlet shall be adamant using the length of piping from the regulator to the most remote outlet served by the regulator.

Examples:

Using Schedule 40 Metal Piping and Natural Gas, where inlet force per unit area [at the appliance] must exist less than ii psi, the pressure level drop in the organisation must be no less than 0.3" due west.c. [After tables in this reference allow grater force per unit area driblet and so volition support higher CFM of gas per hour for the aforementioned diameter and lengths of pipage].

• 10 feet of 1/2" pipage (actual ID 0.622) can provide 131 cubic feet of gas per hour
• 10 feet of 3/4" piping tin provide 273 cubic feet of gas per 60 minutes
• twenty feet of 1/2" piping can provide 90 cubic feet of gas per hour
• 20 anxiety of 3/four" pipe can provide 188 cubic feet of gas per hour

The codes I cite give detailed tables of pipe types, diameters, lengths, and the pipe's capacity to deliver some number of cubic feet of gas per hour. Take a await at your own appliances to see their requirements. Or you lot tin can look up typical apparatus BTUH requirements in the documents we've cited.

402.v Allowable [Natural Gas Piping ] pressure drop.

The blueprint pressure loss in any piping organisation under maximum probable flow weather condition, from the bespeak of commitment to the inlet connexion of the apparatus, shall be such that the supply pressure at the appliance is greater than or equal to the minimum pressure level required by apparatus.

403.1 [Natural Gas Pipe ] General.

Materials used for piping systems

shall exist new and comply with the requirements of this chapter or shall be approved.

403.one.1 [Natural Gas Pipage ] Pipe size and pressure limitations.

1. All requirements for installation of gas distribution piping with operating pressures at ½ psig (3.5 kPa gauge) or less and above ½psig (iii.v kPa guess) shall be in accordance with Chapter iv of this code.

ii. Gas distribution pipe operating at a force per unit area of over ½psig (3.5 kPa guess) to 5 psig (34.5 kPa gauge) and size 4 inches (102 mm) or larger shall exist welded.Exception:Manufactured and listed gas trains provided with the appliance may be threaded

3. All gas distribution piping operating at a pressure above 5 psig (34.v kPa gauge) shall be welded.

4. All welding of gas distribution piping shall exist field of study to special inspection every bit set forth in Section 406.

five. All piping four inches (102 mm) and greater operating at pressure level exceeding five psig (34.5 kPa gauge) must be butt welded, subject area to special inspection and radiographed.

6.Threaded piping may be used upwards to 4 inches (102 mm) at pressure level no greater than ½psig (3.5 kPa guess).

403.2 Used [Natural Gas Piping ] materials.

Used piping, fittings, valves and othermaterials shall not exist reused.

403.3 Other [Natural Gas Piping ] materials.

Material not covered by the standards specifications listed herein shall be investigated and tested to determine that it is safe and suitable for the proposed service, and, in addition, shall be recommended for that service past the manufacturer subject to approval by the commissioner.

403.four [Natural Gas Piping ] Metallic pipage.

Metal piping shall comply with Sections403.4.ane through 403.4.four.

403.4.ane [Natural Gas Pipe ] Bandage fe.

Cast-iron pipe shall non be used.

403.4.2 [Natural Gas Piping ] Steel.

Carbon steel and wrought-fe pipe shall exist at least of standard weight and shall comply with one of the post-obit standards:1.ASME B36.x, 10M2.ASTM A 53/A53M; or3.ASTM A 106.403.iv.3 Copper and brass.

Copper and brass pipe shall no tbe used.

403.iv.4 [Natural Gas Piping ] Aluminum.

Aluminum-alloy pipe shall not be used.

403.five [Natural Gas Pipe ] Metal tubing.

Metallic tubing shall non exist usedexcept as provided in Department 405.five

Watch out: There are life safety hazards involved when fooling with gas piping and appliances. Check with your local plumbing officials about what type of gas piping are permitted where you alive, and while you're at it, inquire what gas pipe or plumbing permits and prophylactic and code compliance inspections are required where you live.

Natural Gas Appliance Operating Pressures in WC, millibars, Pascals, PSI or ounces of pressure

A common operating force per unit area for natural gas appliances is around seven inches of h2o column (WC) or re-stating this in equivalent mensurate, that'south xiv.9 millibars or 1743 Pascals or Pa, or about 0.25 psi (pounds per foursquare inch) or about iv ounces of pressure per square inch.

Meet NATURAL GAS APPLIANCE PRESSURES for details.

LP or Propane Gas Appliance Operating Pressures in WC, millibars, Pascals, PSI or ounces of pressure

A common operating pressure level for liquid petroleum or LP gas appliance is 10" - 11" of water column (WC) or re-stating this in equivalent measures, that'southward 27.four millibars or 2491 - 2739 Pascals or Pa, or about 0.36 - 0.40 psi or about 5.78 to 6.36 ounces of pressure per square inch.

See LPG & PROPANE APPLIANCE PRESSURES for details.

Reader Q&A on gas pipe

@Joe,

Here is a propane-to-natural-gas connector kit - this example is the Permasteel Natural Gas Conversion Kit for Kenmore Grills half-dozen-Burner + Side Burner.

As you can run into, those are unlike materials.

Watch out: Some gas connector lines, but not all of them, are rated for both LPG and natural gas fuels.

I would not employ propane gas connectors nor other parts on a natural gas charcoal-broil BEFORE reading the specifications for your specific product.

Beneath is a connector hose described as rated for propane gas.

Take a await at the materials and also take a wait at the requirements to convert a gas grille from Propane to Natural Gas - my second illustration I'll postal service in a minute.

Bottom line:

You MIGHT be able to use the same hose for connecting to EITHER Propane or Natural Gas **if** the hose is specifically rated for both fuels.

An example is shown below, from M.B. Sturgis Co., a hose that is specifically rated as OK for either fuel (shown every bit sold at Amazon) described as

3/8" ID Thermo Rubber High Pressure level Propane/Natural Gas Hose with 3/viii" 45 Degree Female person Flare Swivels on each end.

Versatile hose tin can be used for whatever Propane or Natural Gas Appliance connection. The Female Flare Swivels make connecting to the supply or appliance like shooting fish in a barrel.

Thermo Safety Hose stays very flexible in common cold conditions.
350 PSI Max Pressure Rating
Certified to UL21, UL569, CAN 8.3

shown above

Can I use a 3/viii propane hose to run a natural gas barbecue

@STEVEN ALTMAN,

Thanks, that's an interesting question; for which I cannot give an authoritative answer, equally might a suitable civil or plumbing engineer.

I suspect that the distances are so short that what you suggest is fine, but technically it's a flow question that could use applied science calulations.

Or you lot'll endeavour the 1" and monitor the result; for short distances similar that re-plumbing sounds modest.

my customer is adding an additional ng hot waster pressure washer to his facility. presently, he has 2 units rated at 415,000 btu's. The additional unit of measurement will be the aforementioned. The ii units are individually continued to a 2" principal with shut offs and regulators. The new unit will be located next to a existing unit of measurement supplied from a one" black pipe approximately x" from the 2" supply line.

if possible, we would like to plumb into the existing 1" line for the additional unit which will be located about x' away. Do you encounter this as a problem? What size black piping line would be required for each individually for this 415,000 btu requirement ? From the to a higher place information, it seems that a 3/four" line at 25' is rated at 600,000 btu's so a ane" would seem to be adequate..practise you agree ? thank you.

Travis:

Take a look at the input pressure that is specified on the LPG regulator that is provided with the powder-coat oven you are installing. If your supply pressure is greater than that you lot'll want a step-down regulator just ahead of the oven.

That'south a common arroyo when having to evangelize loftier gas supply rates over longer piping runs: distribute at higher force per unit area and drop down at the appliance;

Thank yous for your tongue-in-cheek comment too.

80 ft is pretty long; if you don't run the larger line to closer to your burners you lot may find inadequate gas catamenia.

Thank you for the quick response..I have a couple of other questions. I'g planning on running 1 ane/2" fe from a regulator like the examples to within a pes or two of furnace.. Adapting down to a i i/4 flex line for last connection. Do I need another regulator of some sort at the end of the 1 i/2 iron pipe. Second question is regarding the connection of tanks to first regulator. Should I use both tanks simultaneously to feed supply line and if so would I just use the appropriate size piping from each tank into a tee and then into regulator..
Final but not to the lowest degree a hats off and big cheers to all who are involved in running this website...and I'yard impressed with mod's ability to keep pen in cheek when dealing with jackasses like James from higher up...Thank You lot!!
Apologize if this a duplicate comment I don't know if my first one got sent or I somehow just managed to erase it...

Continuing:
More than examples of loftier BTUh gas regulators include this Sensus 243-12 model.

As well see these examples of gas regulator specs and IO manuals that include helpul sizing tables; more sizing tables are in the article above.

https://inspectapedia.com/plumbing/Sensus-243-Gas-Regulator-IO-Manual.pdf SENSUS 243 GAS REGULATOR IO Transmission

https://inspectapedia.com/plumbing/Sensus-243-Gas-Regulator-Specifications.pdf SENSUS 243 GAS REGULATOR SPECIFICATIONS

Travis:

In the article above y'all'll find the basic gas pipage bore and length limits at
"LP Gas Pipage Sizing Codes, Tables & Examples"

and just below that links to PDF files giving detailed gas pipe sizing tables that relate BTUs and piping lengths that volition work.

I doubtable you volition need AT LEAST one 1/4" piping over that 80 ft. run.

And even though that 1/4" ID line between LP tank and regulator is quite short, your BTUh consumption 1.2 million is then nifty that most-likely the whole regulator and pipage diameter need to exist increased. Take a wait at the regulator brand and model, then give its manufacturer a call.

It's probable that yous will demand a larger capacity primary regulator at the LP tank; an example is shown below; oftentimes we run into that for a loftier BTUh application like yours the gas is run from tank to appliance at higher pressure and and so is stepped downwardly by a secondary regulator just alee of the appliance.

The regulator I show below, the Maxitrol ii 1/two" Gas Appliance Regulator 210G-ii 1/2, can evangelize up to 26,000,000 BTU and is probably a higher capacity than you need, merely other models (at lower toll) are of course available.

I'm installing a large pulverization coat oven in my shop. twenty'x10'x10" it is a propane heated unit...The unit of measurement has a max. burn down rate of 1.2mil BTU and 1 1/4 inlet for propane.. The tanks used for propane supply are two #420 tanks located approximately 80ft away and 12ft beneath the burner. Do I need to run 1 1/four pipe all the way back to the propane tanks and will the 1/4" copper line off tank to regulator allow enough fuel to run heater...Thanks

Linda

That regulator you show is intended for use on an RV or camper and is not intended to serve a edifice with longer gas line runs; I suspect that it is very nether-sized and may not exist approved for the employ you have made of it.

[Re-posted with illustration replacing link - mod]

Ok, I installed 50ft of 3/four" black pipage when I remodeled this barn. My plan, to use LP for furnace, dryer, range that was 5 years ago. Plans changed. The lines were tested and tight at that time. All capped. I decided to install a gas range so I pressure level tested the lines, made corrections to couplings that were soap tested and showed leaks.

Retested. Everything is adept. The line is clear. Bought a new dual stage regulator and two tanks. [from Amazon -shown below] Installed a 3/8" black hose to ;my blackness pipage.

This regulator indicates that the tank is empty just I'1000 wondering if my blackness pipe line is too long and the pressure is the line is too low to go the gas to my range which would cause the valve in the regulator or the valve in the tank to shut.

You need to be a footling more than clear on exactly where yous are detecting no fuel.

I'thousand not aware of any gas regulators at appliances that tell the states annihilation about the quantity of fuel bachelor in the lp tank.

Even if your piping is under sized for the length you would still come across some gas menses, it would only exist at too low a rate or pressure.

So let's start past being sure that there's no valve closed somewhere in the system.

Lookout out, if yous're not familiar with proper and safe gas piping this is non piece of work you should endeavor yourself as a mistake could blow the identify up.

I am installing two twoscore# lp tanks to supply my range in my home. I have a long run (50ft) of iii/4" blackness pipe to my kitchen. When I finished installing the tanks, regulator, and connections the regulator shows my tanks are empty (but filled) and no gas is getting to my range. Everything has been pressurized and soap tested so there's no leaks. I'm wondering if I need a higher force per unit area regulator, bigger tanks, or a shorter run. Whatsoever ideas?

Forrest

Cheers very much for your generous comments. I've worked hard on this material for a long fourth dimension and so I'm particularly grateful when readers find information technology useful.

Your questions, comments, criticism, or content suggestions are also always welcome and helpful.

thank you so much for your very detailed commodity. Some people accept to be jerks fifty-fifty when they are getting costless assistance . I learned a lot! Thanks once more
Forrest

we are going to run a line for propane gas about threescore-65 ft, to the business firm. we have a 250 gal. tank. are all the different materials (coated flexible copper, alum, stainless steel) equal every bit far as safety and durability?

TF

Please find your question and my detailed reply now nearly the tiptop of the article above on this page. You may need to clear or refresh your browser cache to see the updated folio. Nosotros welcome your farther photos, comments, questions.

TF

Indeed in that location are plastic-coated LP gas piping materials that are rated for outdoor and for either to a higher place-basis or for buried (underground) use. Those are described on the folio above and at

GAS Pipe, FLEXIBLE CSST

For long gas runs yous often need to add together a regulator.

I accept a 250 gallon propane tank and have 22kw generator hooked upwards to it. I am in the process of having a concrete deck poured and was wondering if I should go undercover with the propane piping to the house fireplace(vented logs) which has never been hooked up, I would like to take an outlet on deck for a propane BBQ pit.

The tank is about 110' away from the fireplace connectedness and the location where I want to add for the bbq is virtually 50 ft. Wondering what is all-time material to run and practice I use tee or header underground/higher up earlier information technology goes into decking. Equally well equally do I need additional regulator?

Garnett In the article higher up y'all'll see some propane pipage size guidelines and examples.

3/8" OD Copper tubing 10 feet long can back up 49 KBTUH (1000 BTUs/Hr) of gas flow or supply at 11 inches W.C. with a 0.five" W.C. pressure level drop. We're using this pressure range as information technology's well-nigh common for household appliances only yous will need to cheque the specifications for your ain appliances.

So yous can see that to go 25 ft you need a larger size.

I am hooking upward a 30,000 btu propane gas free standing stove heater and need to run copper pipe for aboutn25 feet just wanting to know if I should run three/8 pipe or one/2 pipe

I purchased a small lx gal auxiliary lp tank in case emergency and water heater during summer.i have some questions well-nigh hooking it up.
This was used on an rv that ran on LP. Therefore, I had to buy a vapor valve since rv used liquid LP. Doesn't have a regulator.

1--does the brass plumbing equipment that attaches to the tank for vapor need to accept pipage dope/tape?

ii--can lp from this tank be ran into the existing regulator? Small tank will only be used in the situations to a higher place. The output will go into the larger tank.

three--tin CSST be used to hook both tanks together with or west/o protection from weather? Thanks for any answers or comments.

Mike

I'm certainly not absolutely sure simply your best chance for success is to use a large bore gas line five/viii in for example.

The number one complaint I hear from people trying to run a generator is inadequate flow - is usuly because of using too small a diameter piping on a long run. Keep me posted.

Trying to make up one's mind if I tin run an emergency portable generator off the house LP supply line (with majority tank) and not affect the furnace.

I am doing this for a friend who has a medically dependent (on electricity) child. The supply line from the bulk tank to the house is 3/8" OD copper after the regulator.

At the house is a 2d regulator with a 5/8" OD copper line on the output that and then runs directly to the furnace - probably four' of 5/viii" OD piping. No other LP appliances/uses. I am hoping to tap a line off the baste leg of the furnace piping and run over to the generator using soft copper tubing.

The furnace drip leg is 1/2" B.I. NPT pipe. The generator is a 12,000 watt (acme), driven past a xviii HP engine.

The generator location requires an approximately 40' supply line (from furnace to generator).

The generator comes with a primary regulator (intended for connecting to a twenty# or forty# cylinder) and a secondary regulator mounted on the generator.

I do not currently know the furnace BTU only the house is an older 2 story farm house. Too, I live in Iowa where winters tin can be quite cold at times. My concerns? I want to ensure I have the proper line size feeding the generator AND I exercise non desire to "starve" the furnace when the generator is running. Any assistance would be greatly appreciated. Thank you.

Nope, Terry, In my view equally long as the 3/4" NG regulator has the same pressure and catamenia ratings, the simply departure is the pipe fitting size - that ought not injure a affair equally yous'll just have to use the proper piping fittings to step down from 3/4" to 1/2".

I purchased a 3/4" NG regulator by accident to supersede 1/ii" regulator for NG Grill. Both have same output (7 inch WC). Should I expect failure hither?

Not necessarily, Edward; the pressure and diameter lone won't tell the story; the pipe length and other restrictions may also mean yous demand a larger bore. You'll see details in the article on this page.

trying to connect 7500 duel fuel generator with vii,500 running wattage to dwelling propane line will 1/ii" sch. twoscore black pipe be sufficient the generator people say requires 1.2 cfm at seven-11 inches of water?

@Barbara C.,
Thank you for your response, Dan. I will bank check with the propane supplier besides. This site is a great source and I capeesh the work involved to maintain it.

All-time,

Barbara

Barbara

A google Scholar search for "rodent damage gas piping" and similar phrases turned upwardly articles on rodent-proof structure but no specific article (at least not in the first few pages I scanned) reporting an incident of rodents chewing through metal gas piping.

I'm waaay too scared to bet your life on arm-waving but I suspect that when squirrels or other rodents chew through gas lines information technology's plastic or PVC pipe that they attack, non copper or iron piping.

If yous actually run into bite marks or scratches on any of the piping that'd up the concern and I hope that in addition to calling your plumber y'all'll post a photo of that pipage hither.

Propane tanks that supply the heating boiler in my home take slim metal pipes traveling from the tank, across the dorsum of my house and into a larger pipe that enters the banality room. I take found chewed nuts in the expanse at the top of each tank that shelters the gauges that betoken the number of gallons in the tanks.

I am concerned as to whether the chipmunks could eat through the gas lines. There'due south a big population of chipmunks and squirrels most my home due to a grove of adjacent nut trees. Chipmunks have chewed through wires in my engine several times and so this is not an academic or theoretical question. Thanks.

I was very articulate regarding what I was going to apply. I was standing right side by side to the pipe and pointing to them. Either he is overly cautious or had no idea what he was doing. He did ostend that he was a plumber. Whatsoever thoughts on the plan. I also wanted to note that all connections would have PTFE (gas rated) tape. I do know that the flared heads practise not require record. Thanks for your help! JIm

Jim

Your Dwelling Depot plumbing rep may accept idea you lot were talking about using black PLASTIC pipage such every bit ABS.

Black iron pipe is the traditional and correct plumbing material for LPG and Natural gas. Here is what the Abode Depot link says

Strong and durable blackness steel pipes (a.grand.a. Black Fe, Black Malleable) are used to transport natural and propane gas from the street or a tank to the home. Good for fire sprinkler systems considering of heat resistance. Hub-and-spigot cast atomic number 26 pipes should be installed past professionals. Comes in a variety of lengths from two inches to ten feet and diameters of ¼ inch to ii inches.

I'm looking to build (an unusual) charcoal grill with a propane starter. I've done some inquiry and scoured the web for information. At this betoken, I know plenty to exist dangerous and by no means an practiced (why I'chiliad asking here). I went to the Home Depot plumbing department for some data. When I explained that I was thinking of using blackness pipe for the starter, the representative almost had a eye attack, berated me, told me that I would end up on the news for blowing myself upward. I was only trying to get some information and he refused to help and he told his associate to non talk to me because it could be a lawsuit. My question is, is information technology condom to use schedule 40 black pipe as a propane burner? I was likewise wondering if the attached image of my program would be viable or too dangerous to try. As a charcoal starter, it would but be used for 10-xx minutes max. Is that likewise long and cook the pipe? Whatsoever help would be greatly appreciated.

Thank you in advance!

Jim

P.South. What's actually funny is that the Dwelling Depot website states that black piping can be used for LP commitment.
https://www.homedepot.com/c/ab/types-of-pipes/9ba683603be9fa5395fab90cf2ccbfa

Tin you lot substitute ppr for ppe for lpg gas line? Thanks

Sam

I don't know the expertise of the person who advised yous that individual appliance regulators are not needed, but my view is the safest and best approach is to check with the manufcturer of the specific equipment by make and model, or if you have the installation and operation transmission for your fryers offset in that location.

In my experience appliances wait their own local regulator and the transmission writers assume one volition be provided if it is not already an integral part of the appliance.

Here is an excerpt from a commercial fryer installation manual:

To conform the pressure, remove the regulator adjustment screw cover (run into the Gas Valve illustration.) Remove the cover cap. Use a apartment tip screwdriver to adjust the spiral until the right pressure is reached. (clockwise will increase the pressure, counterclockwise will decrease the pressure level.)

Source: Pitco Fryaltor IO Manual, Installation, Operation and Maintenance Manual for Fryer Model Numbers vii,12,14,14R & 18
Gas Fryers With Options and (F) Built-In and UFM (Spacefighter) Filter Systems - retrieed 2022/02/19 original source: https://www.heritageparts.com/medias

Annotation that the instructions for your fryer brand and model may differ.

Hi mod, I'm deplorable it is black iron pipe non galvanized sorry.

My apartment top my steam table and my funnel cake fryer all have a regulator that came from the factory only my 270-pound fryers practise not ane of the person told me that considering it was a hundred fifty thousand BTUs per fryer and I had a 525000 PT y'all regulator did I would non need a regulator on that system is this true and should I go with iii/4 inch hoses from my black Iron to my equipment

Sam y'all might desire to check with your local build department / plumbing inspector since galvanized pipe is often prohibited in favor of black iron pipe for gas piping.

Unremarkably each apparatus has its own gas regulator.

I am installing 2 fryers a apartment superlative and a steam tabular array. I am using iii/4 inch galvanized pipe and so I'm running information technology to my equipment should I use 3/4 inch hose since I'k using 3/4 inch pipe with reducers to the half inch on a couple of pieces of equipment I as well have a 525000 BTU low pressure regulator do I need to have a regulator on each piece of equipment if it did non come with information technology from the factory

Hi. I'm trying to replace my indoor electric washer/dryer merely just discovered there'southward a capped propane pipe sticking out of the wall horizontally. It'southward in the mode. If I have to get through the time/money/hassle of shortening it, I might every bit well stick information technology in the wall. I've seen outlet boxes for washer hot/cold/drain fittings and also outlet boxes for ice makers. I'one thousand wondering if I could utilize ane of those boxes for this application.

The ice maker box seems perfect, although I'd have to widen the hole to accomodate the diameter of the presumably black iron pipage. Would such a box be safe? Is there a improve, pre-existing selection? And depending on what is needed (oasis't opened the wall yet), is a black iron plug just every bit safe as a black fe cap?

In an ideal situation, just demand that cap/plug and PTFE gas line tape, right? And of course an outlet box or something like. Your help is greatly appreciated.

Barbara,

Brass fittings are commonly used in gas piping

However galvanized pipage is not recommended.

I was wondering if when installing gas range I used a iii/8 elbow screwing information technology onto the
Gal nip coming off gas range and so a 3/8 brass nip going into regulator will it make a diffence because it'due south not black fittings ? Volition information technology corrode?

Nathan

That sounds like a fine thought and ought to be ok - let me know if your plumber has a different stance.

Would information technology make sense to always plumb a house for Natural Gas. Natural Gas is available down the road but not at my house yet. I would use Propane until it becomes bachelor. I know Natural Gas typically requires larger piping than propane would it cause any issues for the propane?

No, every bit some older LPG piping including copper and flexible copper were copper colored or gray-coated;

only you will see that newer flexible gas lines and pipage are typically coated with a yellow surface that helps resist damage.

Does fifty.p. gas accept to have a xanthous jacket

...

Continue reading at GAS PIPING, VALVES, CONTROLS - topic home, or select a topic from the closely-related articles below, or see the complete ARTICLE Index.

Or see

Commodity Series Contents

• GAS APPLIANCE CONVERT LP-to-NATURAL GAS
• GAS BTUH, CUBIC Anxiety & ENERGY
• GAS LEAK DETECTION, LP / NG
• GAS LAWS & CONSTANTS
• GAS Pipage, VALVES, CONTROLS - home
  • FLARE FITTINGS
  • FLEXIBLE GAS CONNECTOR INSTALL
  • GAS Piping, FLEXIBLE CSST
  • GAS PIPING CLEARANCES, CODES & DEFECTS
  • GAS Pipage SIZE & Material
• GAS PRESSURES LP vs NATURAL GAS
• GAS Force per unit area vs Edifice Meridian
• GAS PRESSURE Menstruation INADEQUATE
• GAS COOKTOP INSTALLATION
• GAS REGULATORS & APPLIANCE / HEATER CONTROLS
• GAS REGULATORS for LP TANKS
• GAS SUPPLY for ELECTRIC GENERATORS

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