Do You Need Pipe or Tubing? There is a Difference!

The terms pipe and tubing are often used interchangeably, but there is a difference. Experts that work with these products across many industries may not even know how to completely differentiate between the two. Even online research can be misleading because many websites mistakenly misidentify the real differences between them. Tubing is primarily used for structural applications. The outside diameter (OD) is important because it is a specific number. OD and the wall thickness (WT) determines the size of tubing required. Tubing has tighter manufacturing tolerances which often makes it more expensive than piping. However, be aware that copper tubing usually has a measured OD that is 1/8” larger than the nominal ID. Stainless, aluminum, and steel tubing all have measured OD’s that are exact or very close to the stated number. Pipe is categorized as tubular vessels and are mainly used in pipeline and piping systems. Pipe usually transports gases or fluids. Pipe is normally specified by the nominal pipe size (NPS) and the schedule (wall thickness). The manufacturing of nominal pipe sizes is based on a standardized nominal inside diameter that is different from the measured OD. Regardless of the wall thickness, the OD of a pipe will not change. Whatever your pipe and tubing projects require, MKS, your premier supplier for pipe, tubing, fittings and valves, has a wide variety of products available. We have been in business since 1946 and have experts on staff to assist you with what you need. Contact us today!