: 121 0.0 Material For Gas Piping
: 1210.1 All Pipe Used For The Installation, Extension, Alteration, Or Repair Of
: Any Gas Piping Shall Be Standard Weight Wrought Iron Or Steel (Galvanized
: Or Black) Or Yellow Brass (Containing Not More Than Seventy-Five (75) Percent
: Copper). Approved Pe Pipe May Be Used In Exterior Buried Piping Systems.

: 1210.2 All Such Pipe Shall Be Either New, Or Shall Previously Have Been
: Used For No Other Purpose Than Conveying Gas; It Shall Be In Good Condition
: And Free From Internal Obstructions. Burred Ends Shall Be Reamed To The Full
: Bore Of The Pipe.

: 1210.3 All Fittings Used In Connection With The Above Piping Shall Be Of
: Malleable Iron, Yellow Brass (Containing Not More Than Seventy-Five (75)
: Percent Copper), Or Approved Plastic Fittings.

: 1210.4 All Valves And Appurtenances Used In Connection With The
: Above Piping Shall Be Of A Type Designed And Approved For Use With Fuel
: Gas.

: 1210.5 Valves Up To And Including Two (2) Inches Shall Be Brass
: Or Other Approved Material.

: 1211.0 Installation Of Gas Piping

: 1211.1 All Joints In The Piping System, Unless Welded, Shall Be Screwed
: Joints, Having Approved Standard Threads. Such Screwed Joints Shall Be Made
: Up With Approved Pipe Joint Material, Insoluble In The Presence Of Fuel Gas
: And Applied To The Male Threads Only.

: 1211.2 All Welded Joints In The Piping System Shall Be Welded By A
: Certified Pipeline Welder As Defined In Chapter 2 (See Welder, Pipe).

: 1211.3 No Gas Piping Shall Be Installed In Or On The Ground Under Any
: Building Or Structure And All Exposed Gas Piping Shall Be Kept At
: Least Six (6)Inches Above Grade Or Structure. The Term'Building Or
: Structure"Shall Include Structures Such As Porches And Steps, Whether
: Covered Or Uncovered, Breezeways, Roofed Porte-Cocheres, Roofed Patios,
: Carports,Covered Walks, Covered Driveways, And Similar Structures Or
: Appurtenances.
: Concealed Unprotected Gas Piping May Be Installed Above Grade In
: Approved Recesses Or Channels. Exception: When Necessary Due To
: Structural Conditions, Approved Type Gas Piping May Be Installed In
: Other Locations, When Permission Has First Been Obtained From The
: Administrative Authority.

: 1211.4 Where Water Vapor Is Present In The Fuel Gas Served, Accessible
: Drip Pipes Shall Be Provided At Points Where Condensation Will Tend To
: Collect.
: 1211.5 Ferrous Gas Piping Installed Underground In Exterior
: Locations Shall Be Protected From Corrosion By Approved Coatings Or Wrapping
: Materials Or By Any Other Approved Manner. All Horizontal Metallic
: Piping Shall Have At Least Twelve (12) Inches Of Earth Cover Or Other
: Equivalent Protection.
: Plastic Gas Piping Shall Have At Least Eighteen (18) Inches Of Earth
: Cover Or Other Equivalent Protection. Risers, Including
: Prefabricated Risers Inserted With Plastic Pipe, Shall Be Metallic And
: Shall Be Wrapped Or Coated To A Point At Least Six (6) Inches Above
: Grade Or Protected In An Approved Manner. When A Riser Connects
: Underground To Plastic Pipe, The Underground Horizontal Metallic Portion
: Of The Riser Shall Extend At Least Thirty (30) Inches) Before Connecting
: To The Plastic Pipe By Means Of An Approved Transition Fitting Or Adapter.
: Exception: Listed One-Piece Ninety (90) Degree Transition Fittings Or
: Risers May Have Less Than Thirty (30) Inches (0.8 In) Of Horizontal
: Metallic Piping.
: Dale's Plumbing Service Inc LMP

1217.0 Required Gas Piping Size
1217.1 Where The Maximum Demand Does Not Exceed Two Hundred Fifty
(250) Cubic Feet Per Hour (2 L/Sec.) And The Maximum Length Of Piping
Between The Meter And The Most Distant Outlet Is Not Over Two Hundred Fifty
(250) Feet (76 M), The Size Of Each Section And Each Outlet Of Any System Of Gas
Piping Shall Be Determined By Means Of Table 12-3. Other Systems Within
The Range Of Table 12-3 May Be Sized From That Table Or By Means Of The
Methods Set Forth In Section 1217.3.
1217.2 To Determine The Size Of Each Section Of Pipe In Any System Within
The Range Of Table 12-3, Proceed As Follows:
(1) Measure The Length Of The Pipe From The Gas Meter Location To The
Most Remote Outlet On The System.
(2) In Table 12-3 Select The Column Showing That Distance, Or The Next
Longer Distance If The Table Does Not Give The Exact Length.
(3) Starting At The Most Remote Outlet, Find In The Vertical Column Just
Selected The Gas Demand For That Outlet. If The Exact Figure Of Demand Is
Not Shown, Choose The Next Larger Figure Below In The Column.
(4) Opposite This Demand Figure, In The First Column At The Left In Table
12-3 Will Be Found The Correct Size Of Pipe.
Fuel Piping 1217.2 - 1218.4

(5) Using This Same Vertical Column, Proceed In A Similar Manner For
Each Section Of Pipe Serving This Outlet. For Each Section Of Pipe,
Determine The Total Gas Demand Supplied By That Section. Where Gas
Piping Sections Serve Both Heating And Cooling Equipment And The
Installation Prevents Both Units From Operating Simultaneously, Only The
Larger Of The Two Demand Loads Need Be Used In Sizing These Sections.
(6) Size Each Section Of Branch Piping Not Previously Sized By
Measuring The Distance From The Gas Meter Location To The Most Remote
Outlet In That Branch And Follow The Procedures Of Steps 2, 3, 4, And 5
Above.
Note: Size Branch Piping In The Order Of Their Distance From The Meter
Location, Beginning With The Most Distant Outlet Not Previously Sized.
1217.3 For Conditions Other Than Those Covered By Section 1217.1, Such As
Longer Runs Or Greater Gas Demands, The Size Of Each Gas Piping System Shall
Be Determined By Standard Engineering Methods Acceptable To The
Administrative Authority And Each Such System Shall Be So Designed That
The Total Pressure Drop Between The Meter Or Other Point Of Supply And Any
Outlet When Full Demand Is Being Supplied To All Outlets, Will At No Time
Exceed Five-Tenths (0.5) Inches (12.7 Mm) Water Column Pressure.
1217.4 Where The Gas Pressure May Be Higher Than Fourteen (14) Inches
(355.6 Mm) Or Lower Than Six (6) Inches Of Water Column, Or
When Diversity Demand Factors Are Used, The Design, Pipe, Sizing, Materials,
Location, And Use Of Such Systems First Shall Be Approved By The
Administrative Authority. Piping Systems Designed For Pressures Higher
Than The Serving Gas Supplier'S Standard Delivery Pressure Shall Have Prior
Verification From The Gas Supplier Of The Availability Of The Design Pressure.
Systems Using Undiluted Liquefied Petroleum Gas May Be Sized Using Table
12-7 For Eleven (11) Inches (279.4 Mm) Water Column And In Accordance With
The Provisions Of Sections 1217.1 And 1217.2.

1218.0 Medium Pressure Gas Piping Systems

1218.1 Medium Pressure - Pressure Over Fourteen (14) Inches (355.6 Mm)
Of Water Column But Riot To Exceed Five (5) Psig (34.5 Kpa). Second Stage
Pressure - Used In Liquefied Petroleum Gas Systems. Pressure Over Fourteen
(14) Inches (355.6 Mm) Of Water Column But Not To Exceed Twenty (20) Psig
(137.8 Kpa).

1218.2 Approval Of The Administrative Authority And Verification From The
Serving Gas Supplier Of The Availability Of The Desired Pressure Shall Be
Obtained Before Any Medium Pressure Gas Piping System Is Installed.
1218.3 The Following Shall Apply To Medium Pressure Gas Piping Systems
In Addition To The Other Requirements Of This Chapter.

1218.4 Approved Regulators Shall Be Installed On Medium Pressure Gas
Piping Systems, In Approved Locations And Shall Be Accessible For Servicing.
Each Regulator Shall Have A Separate Vent To The Outside.
131

Exceptions: Pounds (Kg) To Inches (Mm) Water Column Regulators
Equipped With Limiting Orifices Capable Of Releasing Not More Than Five
(5) Cubic Feet Of Gas Per Hour (0.04 L/Sec.), When Supplied With Medium
Pressure, Need Not Be Vented To An Outside Location When Such
Regulators Have Been Approved By The Administrative Authority And The
Serving Gas Supplier. These Regulators Shall:
(1) Be Connected To The Same Piping Material Used To Pipe The Structure.
A Listed Gas Connector May Be Used To Attach The Low Pressure Piping
Downstream Of The Regulator To The Appliance Manifold.
(2) Have An Approved Gas Valve In The Supply Line Upstream Of The
Pounds (Kg) To Inches (Mm) Water Column Regulator.
(3) Be Accessible.
(4) Have The Upstream Pressure Identified. Such Identification Shall Be
A Metal Tag Permanently Attached To The Regulator And State: "Warning:
1/2 To 5 Pounds (3.4-34.5 Kpa) Natural Gas Pressure. Do Not
Remove".
(5) Be Installed In A Location That Communicates With A Ventilated Area.

1218.5 An Approved Gas Valve Shall Be Installed Immediately Preceding
Each Regulator. All Regulators That May Be Subjected To Mechanical Damage
Shall Be Substantially Protected To The Satisfaction Of The Administrative
Authority.

1218.6 Tables ]?-5 And 12-6 May Be Used To Size Natural Gas Piping System
Carrying Three (3) Or Five (5) Psig (20.7 Or 34.5 Kpa) Gas. The Procedure To
Determine The Size Of Each Section Of The System Is Similar To That Contained
In Section 1217.0 Using The Pipe Length From The Meter To The Most Remote
Regulator On The Medium Pressure System And Sizing The Downstream Low
Pressure Piping From Table 12-3.

1218.7 Table 12-8 May Be Used To Size Undiluted Liquefied Petroleum Gas
Piping Systems Carrying Ten (10) Psig (68.9 Kpa) Gas. The Procedure To
Determine The Size Of Each Section Of The System Is Similar To Section 1217.0
Using The Pipe Length From The First Stage Or Tank Regulator To The Most
Remote Regulator In The Second State System. Low Pressure Piping To Be Sized
From Table 12-7.

1218.8 Buried Medium Pressure Gas Piping Shall Be Protected From
Corrosion As Required By Chapter 12 And Shall Have A Minimum Earth Cover
Of Eighteen (18) Inches . Such Piping Shall Be Covered With At Least Six
(6) Inches Of Hand Placed Selected Backfill Devoid Of Rocks,
Building Materials, Or Other Matter That May Damage The Pipe Or Wrapping.

132

Table 12-1
Minimum Demand Of Typical Gas Appliances In Btus (Watts) Per Hour

Demand In
Appliance Btu/H Watts/H
Barbecue (Residential).. 50,000 14,050
Bunsen Burner................ 3,000 879
Domestic Clothesdryer........ 35,000 10,255 35,0132
Domestic Gas Range......... 65,000 19,045
Domestic Recessed Oven Section........ 25,000 7,325
Domestic Recessed Top Burner Section......... 40,000 11,720
Fireplace Log Lighter (Commercial)........ 50,000 14,650
Fireplace Log Lighter (Residential).......... 25,000 7,325
Gas Engines (Per Horsepower)........... 10,000 2,930
Gas Refrigerator.................. 3,000 879
Mobile Homes (See Appendix E)
Steam Boilers(Per Horsepower)................ 50,000 14,650
Storage Water Heater
Up To 30 Gallon (114l)....................... 30,000 8,790
Storage Water Heater
40 (151 L) To 50 Gallon (189 L) Tank... 50,000 14,650

Table 12-2
Support Of Piping

Size Of Pipe
Inches Mm
1/2 12.7
3/4 Or 1 1 9. 1 Or 25.4
Horizontal 1-1/4 Or Larger 31.8 Or Larger
Vertical 1-1/4 Or Larger 31.8 Or Larger

Table 12-3 Gas Meter
Size Of Gas Piping
Maximum Delivery Capacity Of Cubic Feet Of Gas Per Hour Of Ips Pipe Carrying
Range Natural Gas Of 0.60 Specific Gravity Based On Pressure Drop Of 0.5 Inch
Water Column

Pipe Size Length In Feet
Inches,
Feet>>>> 10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'
1/2 174 119 96 82 73 66 61 56 53 50 44
3/4 363 249 200 171 152 138 127 118 111 104 93
1 684 470 377 323 286 259 239 222 208 197 174
1-1/4 1404 965 775 663 588 532 490 456 428 404 358
1-112 2103 1445 1161 993 880 798 734 683 641 609 536
2 4050 2784 2235 1913 1696 1536 1413 1315 1234 1165 1033
2-1/2 6455 4437 3563 3049 2703 2449 2253 2096 1966 1857 1646
3 11,412 7843 6299 5391 4778 4329 3983 3705 3476 3284 2910
3-1/2 16,709 11,484 9222 7893 6995 6338 5831 5425 5090 4808 4261
4 23,277 15,998 12,847 10,995 9745 8830 8123 7557 7091 6698 5936

Feet>> 150 200 250 300 350 400 450 500 550 600
1/2 40 34 30 28 25 24 22 21 20 19
3/4 84 72 64 58 53 49 46 44 42 40
1 158 135 120 109 100 93 87 82 78 75
1-1/4 324 278 246 223 205 191 179 169 161 153
1-1/2 486 416 369 334 307 286 268 253 241 230
2 936 801 710 643 592 551 517 488 463 442
2-1/2 1492 1277 1131 1025 943 877 823 778 739 705
3 2637 2257 2000 1812 1667 1551 1455 1375 1306 1246
3-1/2 3861 3304 2929 2654 2441 2271 2131 2013 1912 1824
4 5378 4603 4080 3697 3401 3164 2968 2804 2663 2541

Table 12-1
Minimum Demand Of Typical Gas Appliances In Btus (Watts) Per Hour

Demand In
Appliance Btu/H Watts/H
Barbecue (Residential)................................................. 50,000 14,650
Bunsen Burner............................................................ 3,000 879
Domestic Clothesdryer................................................ 35,000 10,255
Domestic Gas Range................................................... 65,000 19,045
Domestic Recessed Oven Section.............................. 25,000 7,325
Domestic Recessed Top Burner Section.................... 40,000 11,720
Fireplace Log Lighter (Commercial)............................. 50,000 14,650
Fireplace Log Lighter (Residential)............................... 25,000 7,325
Gas Engines (Per Horsepower)................................... 10,000 2,930
Gas Refrigerator.......................................................... 3,000 879
Mobile Homes (See Appendix E)................................. - -
Steam Boilers (Per Horsepower)................................. 50,000 14,650
Storage Water Heater
Up To 30 Gallon (1 14 L) Tank................................. 30,000 8,790
Storage Water Heater
40 (151 L) To 50 Gallon (189 L) Tank..................... 50,000 14,650

Table 12-2
Support Of Piping

Size Of Pipe
Inches Mm Feet M
1/2 12.7 6 1.8
3/4 Or 1 1 9. 1 Or 25.4 8 2.4
Horizontal 1-1/4 Or Larger 31.8 Or Larger 10 3.0
Vertical 1-1/4 Or Larger 31.8 Or Larger Every Floor Level

134

Table 12-3
Size Of Gas Piping
Maximum Delivery Capacity Of Cubic Feet Of Gas Per Hour Of Ips Pipe Carrying
Natural Gas Of 0.60 Specific Gravity Based On Pressure Drop Of 0.5 Inch
Water Column
Pipe Size Length In Feet
Inches,
Feet>>>>> 10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'
1/2" 174 119 96 82 73 66 61 56 53 50 44
3/4" 363 249 200 171 152 138 127 118 111 104 93
1" 684 470 377 323 286 259 239 222 208 197 174
1-1/4" 1404 965 775 663 588 532 490 456 428 404 358
1-1/2" 2103 1445 1161 993 880 798 734 683 641 609 536
2" 4050 2784 2235 1913 1696 1536 1413 1315 1234 1165 1033
2-1/2" 6455 4437 3563 3049 2703 2449 2253 2096 1966 1857 1646
3" 11,412 7843 6299 5391 4778 4329 3983 3705 3476 3284 2910
3-1/2" 16,709 11,484 9222 7893 6995 6338 5831 5425 5090 4808 4261
4" 23,277 15,998 12,847 10,995 9745 8830 8123 7557 7091 6698 5936