Updating c905
1.1 These test methods cover the procedures for determining the uncured (wet) and conditioned (dry) densities of resin, silicate, silica, and sulfur-based chemical-resistant mortars, grouts, monolithic surfacings, and polymer concretes.1.2 Mold Method A outlines the molding procedure generally used for systems containing aggregate less than 0.2 in. Mold Method B covers the molding procedure generally used for systems containing aggregate from 0.2 to 0.4 in. Mold Method C is for systems containing aggregate larger than 0.4 in.PPI has posted a design aid on its website that compares PE and PVC pipe.The tool, called “PACE,” has a fatal flaw, however.
Fifty years of field experience confirm that PVC pipe more than measures up to the rigors of cold-weather installation and use.
Pipe designers should be aware of the pitfalls of specifying PE pipe.
The insertion line found on gasketed PVC pipe – marked around the pipe circumference near the spigot end – indicates the depth of insertion of the pipe spigot into the bell.
The polyethylene pipe industry has significantly changed the way their pressure capacities are calculated.
The result is thinner-walled pipes that have less pressure-resisting capability.
Some of the confusion arises because of the use of both "Dimension Ratio" (DR) and "Standard Dimension Ratio" (SDR) in product standards.
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