Question

What is the minimum steel pipe size for a natural gas service line with the following: Gas equipment with input in Btu/h: furnace-100,000, water heater-35,000 range-60,000: dryer-40,000, gas line has inlet pressure of 0.50 psi, pressure drop of 0.3 inch WC, specific gravity of 0.60, the most remote outlet is 60 feet from meter and a heating value of 1,000 Btu/ft3?

Answer 1

To determine the minimum steel pipe size for a natural gas service line, calculate the total gas load, convert it to cubic feet per hour, and consider pressure drop and specific gravity.

Step-by-step explanation:

To determine the minimum steel pipe size for a natural gas service line, we need to consider the gas equipment input, the inlet pressure, the pressure drop, the specific gravity, the distance from the meter, and the heating value.

1. Calculate the total gas load by adding up the inputs of all the gas equipment: 100,000 Btu/h + 35,000 Btu/h + 60,000 Btu/h + 40,000 Btu/h = 235,000 Btu/h.
2. Convert the Btu/h to cubic feet per hour by dividing by the heating value: 235,000 Btu/h / 1,000 Btu/ft³ = 235 ft³/h.
3. Account for the pressure drop and specific gravity to find the minimum required pipe size using gas flow charts or equations provided by the gas company or relevant standards.