Pipe sizing & procurement tool

Pipe Size, Schedule & Weight Calculator

Match NPS to OD and a common schedule wall, estimate inside diameter and theoretical steel mass, then transfer the selected dimensions into a pipe RFQ.

Calculate pipe weight Browse pipe products

OD x wall selector

Build the dimensional line item

Reference values use common ASME B36.10 dimensions. Select “Custom wall” when the purchase specification calls for an explicit wall outside these schedule examples.

Nominal pipe size (NPS) Wall series Outside diameter (mm) Wall thickness (mm) Loaded from the selected schedule reference. Length per piece (m) Quantity (pieces)

RFQ reference

Dimensions are only the starting point

A quote-ready line item still needs the product standard and edition, grade, seamless or welded process, length tolerance, ends, coating, hydrostatic and NDT scope, marking, MTC, quantity, packing, and destination.

Continue to line pipe selection

01
Dimensional standard, NPS and outside diameter
02
Schedule and explicit nominal wall thickness
03
Grade, product standard, manufacturing process, and service
04
Length, ends, dimensional tolerance, test, coating, and marking
05
Quantity, destination, handling, certificate, and schedule

Pipe size and weight questions

Is nominal pipe size the same as outside diameter?

Usually no. NPS is a nominal designation. Each listed NPS maps to an outside diameter in the governing dimensional standard, and several wall schedules can share that OD.

Can schedule determine pressure capacity?

Schedule supplies a dimensional starting point. Pressure capacity also depends on material, temperature, tolerance, corrosion allowance, joint, design factor, code, and the engineering calculation.

Why should an RFQ state both schedule and wall thickness?

The explicit wall reduces ambiguity, helps check the intended table, and supports mass, tolerance, process, and availability review. The governing standard still controls.