On the MTO sheet, enter the line number, line class, and line size.
Identify the numbers of lines, line classes/specs, and the line size from the P&ID. PMS (Piping Material Specification) Steps for Preliminary MTO Preparation. Bidding of the material/ Request for quotation (RFQ) Documents required for Preliminary MTO are. Pipes' Relative Capacity Relative capacity between larger and smaller pipes.There are two reasons for preparing the preliminary MTO:. Orifices - Natural Gas Capacity Capacity of natural gas orifices. Capacity Sizing low pressure natural gas pipe lines - Metric units. Natural Gas Piping - Sizing of Low Pressure Pipes vs. Size Sizing low pressure natural gas pipe lines - Imperial units. Natural Gas Pipes - Low Pressure Capacities vs. of Outlets Natural gas consumption in laboratory outlets. Natural Gas Laboratory Consumption vs. of Apartments Multiple apartments and natural gas demand. Natural Gas - Meter Capacities Types of natural gas meters and their capacities. Dimensions Carrying capacity of house gas pipes - in imperial and metric units. Gas Pipes - Low Pressure Sizing Sizing gas pipes for apartment service lines. Gas Pipes - Approved Materials Materials approved for gas pipes. Specific Weight and Specific Gravity An introduction to density, specific weight and specific gravity. Gases and Compressed Air Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves. free apps for offline use on mobile devices. Related Mobile Apps from The Engineering ToolBox Make Shortcut to this Calculator on Your Home Screen?. Natural Gas Pipe Calculator - Metric Units 
Natural Gas Pipe Calculator - Imperial Units Specific gravity of natural gas is set to 0.60. The capacity of a 100 ft natural gas pipe with a nominal diameter 0.5 inches (actual ID 0.622 in) and 0.5 inches WC pressure drop can be calculated as The downstream pressure in a houseline after the meter/regulator is in general in the range of 7 to 11 inches Water Column, or about 1/4 psi. Typical values are in the range 0.6 - 0.7. The specific gravity of natural gas varies from 0.55 to 1.0.
The capacity of a low pressure natural gas (less than 1 psi, 6.9 kPa) pipe line with a small pressure loss can be calculated with the Spitzglass formulaįor natural gas the nominal BTU/cf varies from about 900 to 1100 BTU/cf.
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