Which number corresponds to the regular pipe schedule standard?

The regular pipe schedule standard that is most commonly used in various plumbing and piping applications is Schedule 40. This schedule indicates a specific wall thickness, which is appropriate for a wide range of pressures and applications. Schedule 40 pipes are designed for typical water, gas, and drainage applications, making them a go-to choice in many industries.

Understanding the significance of Schedule 40 is essential for millwrights, as it provides a balance of strength and weight, making it versatile for both residential and commercial installations. While other schedules, such as Schedule 60, Schedule 80, and Schedule 100, have thicker walls and are suited for higher pressure applications, Schedule 40 remains the standard for everyday use, highlighting its prevalence in piping systems.