(1) Allowable loss in pressure from point of delivery to appliance. (2) Maximum gas demand. (3) Length of piping and number of fittings. (4) Specific gravity of the gas. (5) Diversity factor. 1 psi (lb/in) = 6,894.8 Pa (N/m Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more. Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves. Materials approved for gas pipes. Sizing gas pipes for apartment service lines.
Gas Flow Chart Multec
Section 7: Sizing Tables and Pressure Drop Charts For Gastite® and FlashShieldTM CSST 7.1 CSST Capacity Tables - Natural Gas Table 7-1 Maximum Capacity of Gastite®/FlashShieldTM Flexible Gas Piping in Cubic Feet Per Hour of with a Natural Gas Gas Pressure of 0.5 psi or Less and a Pressure Drop of 0.5"WC Gas pressure is controlled by regulators Regulators reduce and stabilize pressure downstream of the regulator NG DELIVERY TO YOUR HOME / BUSINESS Natural gas arrives at your home through the utility distribution system Pressure could be anywhere from a 1⁄2 pound APPLIANCE REGULATOR Sanitary Drainage Systems Sizing natural gas pipes - pressures above
5 psi (35 kPa). A common operating pressure for liquid petroleum or LP gas appliance is 10" - 11" of water column (WC) or re-stating this in equivalent measures, that's 27.4 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.
Gases
2018 INTERNATIONAL FUEL GAS CODE (IFGC) | ICC DIGITAL CODES. Printing is a feature of Digital Codes Premium. To access printing capabilities, please subscribe to a Digital Codes Premium subscription. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and. The total pressure drop is the sum of the section approaching A, Sections 1 and 3, or either of the fol-lowing, depending on whether an absolute minimum is needed or the larger drop can be accommodated. Minimum pressure drop to farthest appliance: ΔH = 0.06 inch w.c. + 0.02 inch w.c. + 0.06 inch w.c. =. 0.14 inch w.c. The sizing tables are based on a number of factors. The main factor is gas pressure of the system. The tables cover pressures up to 50 pounds(psi) for schedule 40 pipe materials and up to 5 pound for semi-rigid tubing and Corrugated Stainless Steel Tubing (CSST) The table on the previous page is for gas pressure of 0.5 pounds(1/2 psi). WELDING CUTTING NOTES: Tables show approximate gas pressures for welding or cutting. Tip size numbers vary among manufacturers, so orifice sizes are shown in "number drill" sizes. EYE PROTECTION Revised 8/28/01
The Behavior of Real Gases
STEP 1: Maximum Pipe Length STEP 2: Equivalent Length of Fittings STEP 4: Determine Pipe Size STEP 3: Maximum Demand Volume RECOVERY RATING based on 100 deg. F rise33.9 GPH MINIMUM SUPPLY PRESSURE 6″ w.c. MANIFOLD PRESSURE 5″ w.c. INPUT RATING-BTU/HR 40,000 CAPACITY 50 US GALLONS Figure 1 Partial View of an Appliance Label 2 with a Gas Pressure of 12.0 to 14 in. WC (1/2 psig or less) and a Pressure Drop of 6.0 in. WC (based on a 0.60 specific gravity gas) Tubing Size Tubing Length (ft) 200 250 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1/2" CTS 54 93 72 10 8 3/4" IPS 3 1928 05 46 1" CTS 4 1362 7 08 5 1" IPS 589 146 3 20 1-1/4" IPS 10 58 9 37 6 24
Liquid Propane (LP) Gas by Length of Piping Run (Approximate 2,520 BTU/h LP Gas per 1 CFH; based on a 1.52 specific gravity of gas) Minimum Gas Pressure: 11 in. w.c. Pressure Drop: 0.5 in. w.c. Intended Use: PE Pipe Sizing Between Integral Second-Stage Regulator at Tank or Second-Stage (Low-Pressure) Regulator and Building Run (ft.) PIPE SIZING CHART Natural Gas : Pipe Sizing Chart Natural Gas (NG) flow is given in thousands of BTU/hr. - One cubic foot of LP gas - 1000 BTU Nominal pressure at the burner for Natural Gas is 3.5" of water column. (Typical machine supply 5"-7") Pipe length must include additional length for all fittings.
Relating Pressure, Volume, Amount, and Temperature The Ideal Gas Law Chemistry I
GAS: NATURAL INLET PRESSURE: LESS THAN 2 psi PRESSURE DROP: 0.5 in. w.c. SPECIFIC GRAVITY: 0.60 PIPE SIZE (inch) NOMINAL: 1 / 2 3 / 4 1 P1 is upstream pressure in psia. P2 is downstream pressure in psia. G is gas gravity. Tf is gas flowing temperature in °R. Z is gas compressibility factor. D is pipe inside diameter in inch. Le is equivalent length in mile. s is elevation adjustment parameter. Result.
