Which statement correctly describes the pipe schedules' pressure ratings for typical propane piping?

Which statement correctly describes the pipe schedules' pressure ratings for typical propane piping?

• A. Schedule 40 is 125 psi; above 125 psi, use Schedule 80
• B. Schedule 40 is 200 psi; above 200 psi use Schedule 60
• C. Schedule 40 is 75 psi; above 125 psi use Schedule 120
• D. Schedule 40 is 150 psi; there is no Schedule 80

Answer: (A)

Understanding pipe schedules and pressure ratings helps ensure propane piping is safe for the pressures it will carry. Schedule tells you how thick the pipe walls are; thicker walls mean a higher pressure rating. For typical propane piping, Schedule 40 steel pipe is rated to about 125 psi. If you need to carry more pressure, you switch to Schedule 80, which has thicker walls and a higher rating. So the rule is: use Schedule 40 up to its 125 psi limit, and move to Schedule 80 when higher pressure is required. The alternative figures (such as 200 psi or 75 psi) don’t align with the standard Schedule 40 rating, and there is indeed a Schedule 80 used for higher pressure applications.

Understanding pipe schedules and pressure ratings helps ensure propane piping is safe for the pressures it will carry. Schedule tells you how thick the pipe walls are; thicker walls mean a higher pressure rating. For typical propane piping, Schedule 40 steel pipe is rated to about 125 psi. If you need to carry more pressure, you switch to Schedule 80, which has thicker walls and a higher rating. So the rule is: use Schedule 40 up to its 125 psi limit, and move to Schedule 80 when higher pressure is required. The alternative figures (such as 200 psi or 75 psi) don’t align with the standard Schedule 40 rating, and there is indeed a Schedule 80 used for higher pressure applications.