Waste Management

Corrosion-Resistant Piping Systems by Philip A. Schweitzer P.E.

By Philip A. Schweitzer P.E.

This paintings provides a step by step technique for deciding on the main compatible piping fabric for any given state of affairs. It describes all corrosion-resistant piping platforms - together with thermoset and thermoplastic, coated and steel structures and miscellaneous structures equivalent to glass, carbon and clay. A compatibility desk for every piping procedure, compiling the corrosion resistance of over one hundred seventy five universal corrodents, is supplied.

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The high-impact pipe is designedto take greater shock loads than normal-impact pipe. Type 1 pipe has a maximum allowable temperature rating of 150°F (66"C), while type pipe has a maximum allowable temperature rating 140°F (60°C). MostPVC pipe is of the high-impact variety. Pipe Data inch to 16 inches nominal diameter in schedule 40 and PVC piping is available in schedule 80 wall thicknesses. Dimensionsareshownin Table 2-4. The maximum allowable working pressures are given in Table 2-13 for schedule 40 and schedule 80.

Figure shows the typical construction of an expansionjoint. These joints provide axial compression, axial elongation, angular movement, torsional movement, and lateral movement. Operating pressures and temperatures are dependent upon the specific elastomer. Burial of Thermoplastic Pipe The primary criterion for the safe design of a buried thermoplastic pipe system is that of maximum allowable deflection. On rare occasions buckling of the pipe and/or excessive loadingmay control the design. In the latter case thesafe stress undercontinuous compression may conservatively be assumedto equal the hydrodynamic designstress for the end use conditions.

Table 2-69 provides the physical and mechanical properties of Saran. S. Department of Agriculture for transporting fluids used in meat production. Pipe Data Saran pipeis available only in schedule 80 in diameters of '/z inch through inches. The dimensions of Saran pipe differ from those of other thermoplastic piping systems (see Table 2-70). The maximum allowable operating pressures at various operating temperatures are given in Table 2-7 Joining, Installing, Support Saran pipe is joined only by threading.

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