What are the most common schedules of pipe?

There are many different types of pipes, and NPS is one of the most common. This is a measurement that specifies the outside diameter of a pipe, which is an easy way to identify the type of pipe that you are looking for. However, it is not always accurate; some manufacturers may list different size specifications for the same pipe, such as NPS 1/8 and NPS 3/32. Listed below are the differences between these two measurements.

NPS pipe sizes

NPS pipe sizes are different from metric sizes, so it is important to understand what the differences are. For example, in the United States, there are several standardized sizes for the pipe. The metric system is a great help when specifying the size of your pipeline, but NPS values aren’t always a perfect match. As a result, you should be aware of the difference between NPS and metric pipe sizes before ordering.

How do you define pipe size?

The size of a pipe is defined by its nominal bore or outside diameter. Nominal diameter is commonly referred to as a DN, while OD is a measurement of the inside diameter. For instance, NPS20 inch should be 508mm. These measurements are important when choosing a pipe. But you must make sure that the pipe is the proper size for your application. Remember that the OD is smaller than the NPS :

                                                                   POLYVINYL CHLORIDE (PVC) Pipe Sizes

Polyvinyl Chloride (PVC) Pipe Sizes – Schedule 80

Polyvinyl Chloride (PVC) Pipe Sizes - Schedule 80

Polyvinyl Chloride (PVC) Pipe Sizes – Schedule 40


     Stainless-Steel-Pipe-Sizes 80

Stainless-Steel-Pipe-Sizes 80S






Stainless-Steel-Pipe-Sizes 40