Design pipe-reinforced plastic

For calculation of flow in fire main systems, the design engineer should use the Hazen-Williams friction coefficient of C = 100 in the design of bare steel and concrete steel lined pipingforfire water systemsto allow for future deterioration as the system ages. A friction coefficient of C = 140 may be used for plastic pipe, such as fiber reinforced plastic (FRP) or polyvinyl chloride (PVC). 

An incorporated technical organization founded in 1937 and serving the needs of the entire plastics industry in the U.S. It establishes standards for the properties and selection of materials and for product design and engineering. Its two major publications are the Plastics Engineering Handbook and the Reinforced Plastics Handbook. With it are associated the Plastics Pipe Institute and the Reinforced Plas-tics/Composites Institute. It is located at 1801 K ST NW, Suite 600K, Washington DC 20006. Website http //www.socplas.org. 

The chemical and pharmaceutical industries use a good deal of piping, often for the transport of aggressive fluids. The design criterion in these circumstances is usually resistance to corrosion or solvation of the pipe wall. These industries will accept high materials cost, for instance stainless steel is commonly used. Plastic materials are therefore used when they have appropriate chemical resistance or perhaps temperature tolerance. Reinforced-plastic pipes in particular are also used in the chemicals sector. 

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