ASTM D2412 is a testing standard used to determine the stiffness and load deflection of plastic pipe. This summary is intended to help you understand the basic procedure and equipment required to complete this test with accuracy.

Pipes tested under ASTM D2412 must be smaller than the envelope of the two compression platens by at least a half an inch. Square or circular platens can be used, with most customers choosing a square platen. Care must be taken to account for the mid-section of the pipe which will expand slightly as the pipe is compressed.

Calculations for ASTM D2412 include percentage load deflection, pipe stiffness, and the stiffness factor. These calculations are made by taking load measurements at certain percentage deflections (5%, 10%, 20% etc.) and dividing the numbers into each other using the mathematical formulas from the official publication.