By Philip A. Schweitzer P.E.
This paintings provides a step by step process for deciding upon the main compatible piping fabric for any given scenario. It describes all corrosion-resistant piping platforms - together with thermoset and thermoplastic, covered and steel structures and miscellaneous platforms akin to glass, carbon and clay. A compatibility desk for every piping process, compiling the corrosion resistance of over one hundred seventy five universal corrodents, is equipped.
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Extra resources for Corrosion-Resistant Piping Systems
Within the structural nature of PP a distinction is made between isotactic PP and atactic PP. Isotactic PP accounts for 97% of PP, wherein the polymer units are highly ordered: H H l I C - c I H C - H I H Atactic PP is a viscous liquid-type PP having a PP polymermatrix. In some cases PP is actually a combination of PE and PP formed during a second stage of the polymerization. This form is designated copolymerPP and produces a product that is lessbrittle than the homopolymer. The copolymer is able towithstandimpact forces down to -20°F (-29”C), while the homopolymer is extremely brittle below 40°F (4°C).
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. No other method has proven successful. Installation should follow the details given on pages 24-32. Table 2-72 provides the recommended support spacingfor the piping. With a support spacing of 2 feet less it would be more economical to use a continuous support as shown in Figure 2-5.
Control of the deflectionof the pipe, along with proper installation procedures, then becomes the key factor in an underground pipeinstallation. ) loop. elastomeric expansion joint. ) = (OD - t) 2 Pipe that isto be used for potable water service should be installeda minimum of 12 inches below the expected frost line. The width of the trench mustbe sufficient to allow convenient installationof the pipe, but at the same time be as narrow as possible. Table 2-10 lists trench widths for various pipe sizes found adequate in mostcases.