AASHTO M278-15 pdf free download
AASHTO M278-15 pdf free download.Class PS46 Poly(VinyI Chloride) (PVC) Pipe.
3. TERMINOLOGY
3.1. General—the nomenclature used in this specification is in accordance with the definitions given in Definitions ASTM D883 and Definitions ASTM F412, unless otherwise specified. The abbreviation for polyvinyl chloride is PVC.
3.2. delamination—the separation of the layers of PVC in a multilayer pipe.
3.3. reiivrked PVC—clean, regrind PVC taken from the manufacturer’s own production facility excluding multilayer pipe.
3.4. external recycled PVC—industrial rework material generated from a manufacturer manufacturing product to a standard other than this standard and used by the manufacturer manufacturing to this standard fur the center layer of solid wall coextruded pipe.
4. CLASSIFICATION
4.1. The smooth-wall PVC pipe covered by this specification is classified as follows:
4.1.1. Type S—This pipe shall have a full circular cross section and solid wall constructed of virgin or reworked PVC compound complying with cell classification 12454 or 12364.
4.1.1.1. Type SP—This pipe shall be TypeS with perforations.
4.1.2. Type M—This pipe shall have a full circular cross section and multilayer walls (middle wall of external recycled PVC and outer walls of virgin or reworked PVC). The inner and outer walls shall comply with cell classification 12454 or 12364. The center wall shall comply with cell classification 12224.
4.1.2.1. Type MP—This pipe shall be Type M with perforations.
4.2. Perforations are described in Section 8.2.5.
MATERIALS
Solid wall pipe and fittings shall be made from virgin or reworked PVC material with cell classification 12454 or 12364, as defined in ASTM D1784, and shall be a single compound procured from a single manufacturer. Solid wall coextruded pipe shall be made from virgin or reworked PVC for the inner and outer layers and external recycled PVC for the inner layer. The recycled PVC inner layer shall be cell classification 12224.
6.1.1. PVC compounds that have different cell classifications shall also be acceptable provided that (1) one or more properties are superior and (2) no properties are inferior to the compounds specified in Section 6.1.
6.2. Reworked Material— Reworked PVC material from the manufacturer’s own production, not including multilayer pipe, may be used. Reworked PVC shall be clean: generated from the manufacturer’s own production of pipe, fittings, or accessories and not used by any other manufacturer: and blended back into the same type of product.
6.2.1. Reworked PVC material generated from the manufacturer’s own production of multilayer pipe shall be reused only in the center layer of multilayer pipe.
6.3. External recycled PVC —External recycled PVC in multilayer pipe may be used in the center layer only provided that the PVC material from each source complies with the requirements specified in Section 6.1.
6.4. Solvent Ce,nent—The PVC solvent cement used in joining the pipe and fittings for solvent cement joints shall comply with the requirements of ASTM D2564.
6.5. Gaskets—-Elastomeric seals (gaskets) shall comply with the requirements of ASTM F477. The lubricant used for assembly shall have no detrimental effect on the gasket or on the pipe or
fittings.
7.JOINING SYSTEMS
7.1.Gasketed Joints—The joint shall be designed so that, when assembled, the gasket inside the bell will be compressed radially on the pipe spigot to form a watertight seal.
7.1.1. The joint shall be designed to avoid displacement of the gasket when installed in accordance with the manufacturer’s recommendations.AASHTO M278-15 pdf download.
