NPS is determined by the internal diameter of the pipe. More precisely, NPS is associated with an approximation of the pipe’s inner diameter, not the exact outer diameter and wall thickness.
The calculation method of NPS can be calculated by the inner diameter:
Inside diameter =NPS x 25.4−2 x wall thickness
Get the inner diameter of the pipeline, you can calculate the outer diameter of the pipeline:
Outside diameter = inside diameter +2 x wall thickness
Through reasonable NPS data calculation, it can help engineers and pipe manufacturers choose the right pipe size, and then achieve the perfect effect of the project.
