ASTM D2412 GRP, PVC, HDPE plastic pipe compression stiffness test

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.

Test process

1, Sample installation

Place the specimen horizontally, and the contact surface of the platen at both ends should be parallel to avoid axial displacement.Preloading: Apply an initial load of 50 N to eliminate the gap.

2, Formal loading: Compressed at a rate of (5±1) mm/min, the force value (F) when the deformation reaches 3% (ΔY=0.03D, D is the initial inner diameter) is recorded.

3, Repeatability verification

The test was repeated after rotation of the same specimen by 90°, and the average of the results was taken twice.

Beijing United Test Co.,Ltd. export@unitedtest.com offer the testing equipment of ASTM D2412 GRP, PVC, HDPE plastic pipe compression stiffness test equipment. Contact us now : export@unitedtest.com, unitedtest@hotmail.com