What does SDR stand for in piping terminology?

In piping terminology, SDR stands for Standard Dimension Ratio. This ratio is a critical measurement used to define the relationship between the nominal diameter of a pipe and its wall thickness, providing a standardized way to classify pipes based on their dimensions. The SDR value is calculated by dividing the pipe's outer diameter by its wall thickness, which helps in assessing the pipe's strength, flexibility, and application suitability.

Understanding SDR is essential for irrigation technicians, as it impacts the performance and longevity of piping systems. Pipes with lower SDR values have thicker walls and are often used in applications requiring higher pressure ratings, while those with higher SDR values may be more suitable for lower pressure scenarios or specific applications where flexibility is needed. This concept of SDR is fundamental in the selection and installation of piping in irrigation systems and other applications, ensuring that the correct pipe material and dimensions are chosen to handle the operating conditions expected in the field.