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AWWA C301-14
New product
AWWA C301-14 Prestressed Concrete Pressure Pipe, Steel-Cylinder Type
standard by American Water Works Association, 01/01/2015
More info
Full Description
This standard describes the manufacture of circumferentially prestressed concrete pressure pipe with a steel cylinder and wire reinforcement in diameter sizes 16 in. (410 mm) through 144 in. (3,660 mm) manufactured with a steel cylinder and wire reinforcement. The standard describes lined-cylinder pipe with a core composed of a steel cylinder lined with concrete and subsequently wire-wrapped and coated with premixed cement mortar and embedded-cylinder pipe with a core composed of a steel cylinder encased in concrete and subsequently wire wrapped and coated with premixed cement mortar.Major revisions to this edition of C301 include:The minimum yield strength requirement of steel used in the manufacture of cylinders for pipe has increased.In the requirements for steel bar reinforcement, the conformance standard for the 0.55 percent maximum carbon equivalency has changed.In the material requirements for flat steel bars, an optional conformance grade has been removed.A requirement has been added regarding test reports showing the physical properties of the rubber compound used in the manufacture of gaskets.A new tolerance has been added to the minimum cover requirement of mortar coating over wire.A requirement in the testing of concrete strength for the pipe core has been added.For placement of prestressing wire reinforcement, the required action to be taken in case of wire breakage has changed.Provisions for multiple layers of prestressing wire have been added.Requirements for linings and coatings for fittings have been modified extensively.