Ductile iron pipe resists up to 6.1 times the hydrostatic burst pressure of HDPE pipe.
Tests were conducted in accordance with ASTM D159912 by fitting the pipe specimens with gasketed, unrestrained end caps and securing them in a hydrostatic test structure to resist the end thrust. This arrangement produced stresses primarily in the circumferential direction in the walls of the pipes as internal hydrostatic pressure was applied.
All of the Ductile iron pipe specimens (6- and 24-inch diameter) burst in the form of a fracture 15- to 41-inches long.
All of the HDPE specimens (6- and 24-inch diameter) failed by “ballooning” with some also bowing and snaking, causing the pipe to pull away from the end closures and leak at the test seals.
To read the full findings after tests, access the publication.
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