Thickness of pipe and overall distance of generator from primary regulator 2. For meter sizes up through al 800, the company will install a meter bar. When utilitynatural gas and undiluted liquefied petroleum gas propane gas systems are installed within the same building or. Pipe bends 90 degree elbow equates to an extra 10 feet of pipe and 45 degree an extra 5 feet. With lp being heavier than air, and ng being lighter than air, are there limitations on trapping the regulator vent piping, and, should the vent piping slope up for ng and down for lp or does it not matter enough to matter. Seduct, and vertex systems see appropriate standards in the legislative. Flue collar that portion of an appliance designed for the. Lpgas servicemans handbook the fisher controls lpgas servicemans handbook serves as a general reference of information on lpgas and for the installation, operation and maintenance of lpgas equipment. Pipe away line size minimum do not use a smaller vent line than the vent outlet connection. Guide to passing the fuel gas exam fuel gas code combustion air requirements section 304.
It provides key data and answers important questions that are relevant to management and field servicemen in the lpgas industry. Ensuring a successful gas meter set gas meter header has been kept plumb and square final grade has a minimum clearance of 6 to the bottom of the meter gas regulator vent maintains 18 minimum height from grade gas regulator vent meets 18 clearance requirements from windows, doors, other openings into the building gas regulator vent maintains a minimum of 10 from any mechanical air. Gas line breaks, leaks, odor or pressure problems only. Oct 20, 20 this one covers wrought iron pipe sizing for natural gas systems. When using a vent limiting device, the regulator must be mounted in a horizontal upright position. Gas meter piping supplying gas to a building at a pressure in excess of 12 psig 3. Venting guidelines for category i gas appliances introduction the vent sizing tables in this brochure are part of the national fuel gas code. The j48 is an industrial low pressure regulator with an optional vent limiter. Maximum capacity of type k copper or sch 40 iron pipe in gph of lpgas values based on darcys equation with a 20% reduction in flow to account for flashing of liquid during flow through.
The cl231 may be used to control gases other than natural gas. B corrugated stainless steel shall not be installed outside unless it is. Be sure to read and apply to vent sizing paragraphs 504. Total equipment connected to the line and number of fittings. Do not install a suppressor on large vent regulators. Pipe sizing chart liquid propane lp gas flow is given in thousands of btuhr. I usually ask a few questions and can quickly direct.
Maxitrol has designed series regulators that are built following the international fuel gas code. B35 series regulator gas products sales, inc natural gas. As a stocking distributor of natural gas regulators, i am often asked by my customers which regulator to use for a particular application. Chapter 4 gas piping installations international code. Continuing my back to basics series, i thought i would address sizing natural gas regulators. Vents for most draft hoodequipped appliances can still be sized based on the draft hood outlet.
Bob, question for you one venting regulators like that. Description with a malleable iron body, the b35 will. Safety in the installation and use of gas systems and appliances hse. These tables cover vent sizing for both fanassisted combustion and draft hoodequipped appliances. Gas meter piping supplying gas to a building at a pressure in excess of 1 2 psig 3. The regulator vent must be piped to the out doors per nfpa 58. Emerson has the following recommendations for the installation of vent piping, based on csa b149 natural gas and propane installation code. This pressure moves gas along the pipe or tubing to the appliance burner. Venting gas regulators overpressure protection devices for. Where additional venting is required, the fixtures shall be vented by individual vents, common vents, wet vents, circuit vents, or a combination waste and vent pipe. Guide to delivering gas to gas fueled generator sets. Regulator sizing shall be subject to theminimum available inlet supply b149. Natural gas, propane, butane, air, nitrogen and all noncorrosive gases. The pipe size from the line pressure regulator to each outlet shall be determined.
Relief vent openings on gas regulators are required to be vented to atmosphere and should not be tied together for various reasons. Good practices for gas piping and appliance installations. Its outstanding performance and versatility make it an excellent choice for use on industrial meter sets, combustion equipment, boilers, burners, unit heaters, furnaces, ovens and other. Hybrid pressure systems, with a 2 psi static pressure with regulators at each appliance, are sized differently than in this example. Outside temperature greatly affects container pressure. Basic installation of gas regulators there are some guidelines for the proper installation of gas regulators. Pipe sizing tables or sizing equations in accordance with section 402. This means there will be 2 psi at the inlet of the regulator under no flow conditions, and 1 psi. Pipe bends 90 degree elbow equates to an extra 10 feet of pipe and 45 degree an extra 5 feet 3.
Lintegral vent limiting orifice as the breather hole with dust cap. The sizing tables included in a listed piping systems manufacturers installation instructions. Is there a rule of thumb or local code california for sizing gas regulator vent lines based on the length of the pipe. The 325 series regulator with a vent limiter will reduce the pressure to the rated inlet pressure range of the gas appliance regulator. For more information, visit maxitrol appliance pressure regulator and vent limiter. Vent connector the pipe or duct which connects a fuelgas burning appliance to a vent or chimney.
Gas meter header has been kept plumb and square final grade has a minimum clearance of 6 to the bottom of the meter gas regulator vent maintains 18 minimum height from grade gas regulator vent meets 18 clearance requirements from windows, doors, other openings into the building. Gas regulator and gas regulator vent outlets upcodes. This one covers sizing the vent for 80% gas furnaces that vent with metal pipe. Vent connector the pipe or duct which connects a fuelgas burning appliance to a. Basic installation of gas regulators natural gas equipment. Install the regulator properly with gas flowing as indicated by.
More available on this on gas line pressure versus appliance control. The vent diameter must be equal to or greater than the diameter of the regulator outlet vent. Regulator installation and maintenance instructions 243 service regulators introduction the 243 is a large capacity generalpurpose gas pressure regulator. One cubic foot of lp gas 2516 btu this chart refers to low pressure lp, after regulation, standard nominal pressure at the burner for liquid propane gas is 11 of water column. Vent piping is necessary for many regulator installations but increases the likelihood of harmonic instability in the field. Installation of a manual flue damper on a domestic. Chapter 9 vents 2015 international plumbing code icc. Customer piping the pipe and fittings which carry gas from the outlet of the meter to any points of utilization. Manual main shutoff valve a manually operated valve in the gas line for the. Requirements for vent limiting device specific gravity maximum allowable flow rate, cubic feet per hour cm3s vent limiter for use only with natural, manufactured, mixed gases, and lp gas air mixtures. Solving instability issues in commercial and industrial natural gas. The cl231 regulator is designed primarily for use in medium size commercial and industrial installations requiring. Specifications and requirements for gas installations.
The local gas utility can provide more information on upgrading the meter and regulator for the home. Venting gas regulators overpressure protection devices. Natural gas installation standards handbook these specifications will be revised or amended as required in keeping with developments and progress of the industry. Regulator top cap has the capability of including the provision for a wire seal. Gas piping shall be sized in accordance with one of the following. Install the regulator properly with gas flowing as indicated by the arrow on the casting. The regulator has an internal diaphragm which must be able to move freely and unrestricted in order to properly regulate the gas pressure. Natural gas pressure regulators measurement control systems. Regulator installation and maintenance instructions 243.
This one covers wrought iron pipe sizing for natural gas systems. The researchers could adjust the size of the regulators vent piping to induce instability in regulators, another factor to keep in mind during system design. The 325 must be installed at or near the appliance. Fan max the maximum appliance input rating of a category i appliance with a fanassistedcombustion system that could be attached to the vent. Connectors singlewall pipe stovepipe is not recommended for use in type b venting systems. The dry vent extensions for the additional venting shall connect to a branch vent, vent stack, stack vent, air admittance valve, or shall terminate outdoors. The piping system may also include a gas pressure regulator s, a shut off valve s, tube shielding devices. Gas piping factstankless water heating information for properly sizing gas lines for use with tankless water. Solving instability issues in commercial and industrial.
Installing a suppressor or a under sized vent line will limit the relief capacity. Performance pipe driscoplex all standards us poly company uponor all standards polypipe by duraline all standards charter plastics all standards oil creek plastics 114 ips and below. If the regulator is to be indoors, consider a line pressure regulator with a vent limiter and overpressure protection device opd. Aug 19, 2018 fan max the maximum appliance input rating of a category i appliance with a fanassistedcombustion system that could be attached to the vent. Optional automatic vent limiting device ball check permits unobstructed inhalation for fast regulator diaphragm response on opening cycle, but limits gas escapement to within ansi standards should a diaphragm rupture. Gas pipe sizing appendix a gives an example for gas pipe sizing. These brief guidelines are in no way meant to be a substitution for the manufacturers installation and maintenance instructions may have specific details that pertain to each model. Sizing instructions when 325 series regulators are used on 2 psi piping systems, often times the 2 psi systems are sized with a 1 psi pressure drop through. The inspector will or should know the details, your plumbing code book fuelgas section may have info on venting gas regulators as well. Natural gas meters and regulators fire engineering. A fuel gas piping shall not be installed or run in or through a circulating air duct, clothes chute, chimney, or gas vent, ventilating duct, dumb waiter, or elevator shaft. Sizing tables for 12 psig, 2 psig and 5 psig service, as applicable, to aid the installer or contractor in selecting. Reinforced diaphragm for increased speed of response and durability. Lpgas servicemans handbook the emerson lpgas servicemans handbook serves as a general reference of information on lpgas and for the installation, operation and maintenance of lpgas equipment.
It is a versatile poundstopounds unit which is ideal for highpressure industrial applications, rural and suburban taps. Too low a container pressure means that not enough gas is able to get to the appliance. Proper installation of a high efficiency gas furnace requires attention to many details and interconnecting systems. The appliance is a direct vent appliance installed in accordance with the conditions of the listing and the manufacturers instructions.
Support the vent pipe to eliminate strain on the regulator diaphragm case. The company regulator and meter installation shall be supported with brackets. B35 series regulator field service regulator applications the b35 is specially designed for safe, accurate firststage pressure reduction on highpressure gas systems. Sizing instructions 4 mounting position the 325 series is suitable for multipoise mounting, but when used with a vent limiting device, the regulator must be mounted in a horizontal upright position see figure 2. Fittings intended for connection to threaded pipe shall have cleanly. The gas vent sizing tables are not applicable to outside exposed chimneys or vents below the roofline per nfpa 54. The use of metal pipe, metal tubing, pvc meeting the requirements of ul 651 or flexible pipe meeting the requirements of ul 1660. Certified line pressure regulator guidebook maxitrol company. Mar 28, 2015 this one covers sizing the vent for 80% gas furnaces that vent with metal pipe. Horizontal vent pipes forming branch vents, relief vents or loop vents shall be located not less than 6 inches 152 mm above the flood level rim of the highest fixture served. Consult your local gas supplier or the national fuel gas code in regards to these type systems. Where gas distribution pressure in excess of 1 2 psig 3.
A present or prospective user of the companys gas service or agent thereof. Maximum capacity of type k copper or sch 40 iron pipe in gph of lpgas. B35 series regulator field service regulator applications. A feature incorporated in a selfventing pressure reducing regulator which. Natural gas is distributed in gas mains at high pressures in relatively small pipes and are reduced in pressure at regulators at gas meters with an increase in pipe size so that the same amount. I just cant seem to find the appropriate source for this information. The piping that is installed after the companys meter or regulator that connects the customers appliances and equipment to the gas supply. The pipe size for each section of higher pressure gas piping shall be determined using the longest length of piping from the point of delivery to the most remote line pressure regulator. Gas pressure regulator venting hvacr engineering engtips. With lp being heavier than air, and ng being lighter than air, are there limitations on trapping the regulator vent piping, and, should the vent piping slope up for ng and down for lp or. Its outstanding performance and versatility make it an excellent choice for use on industrial meter sets, combustion equipment. This may include additional exterior pipe running along the building wall, up to and along the building roof, or back down. Atype b vent lining an exposed masonry chimney is considered to be an enclosed vent system, and these tables may be used. Here, each gas regulator vent is piped to the exterior wall individually with an approved device, peck vent cap or a screened 90 to an approved location.
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