Final answer:
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.
- 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.
- 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.
- 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.