Download Corrosion-Resistant Piping Systems by Philip A. Schweitzer P.E. PDF
By Philip A. Schweitzer P.E.
This paintings provides a step by step strategy for settling on the main appropriate piping fabric for any given scenario. It describes all corrosion-resistant piping structures - together with thermoset and thermoplastic, covered and steel platforms and miscellaneous platforms equivalent to glass, carbon and clay. A compatibility desk for every piping approach, compiling the corrosion resistance of over one hundred seventy five universal corrodents, is equipped.
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Additional resources for Corrosion-Resistant Piping Systems
Table 2-39 provides the physical and mechanical properties of the copolymer. H- Pipe Data Polypropylenepipeisproducedfromboththecopolymerandthehomopolymerin schedule schedule 80, and pressure-rated systems. Chapter The maximum allowable operating pressures of schedule 40 and schedule 80 fusion weldedhomopolymer PP pipe at 74°F (23°C)areshownin Table2-40,while the maximum allowable operating pressure for threaded schedule 80 homopolymer pipe at 70°F(21°C)isgivenin Table 2-41. These pressureratingsmustbereduced if the operating temperature exceeds70°F (21°C).
Table 2-5 shows the recommended bolting torques based on well-lubricated bolts, which will give a bolt stress of 10,000-15,000 psi. It is also necessary to provide a gasket between mating flanges of appropriate corrosion resistant properties and compressibility. The disadvantages of flanged joints are: 1. Highmaterialand Bulkiness labor costs Until recently, flanging was the only method whereby thermoplastic pipe could be connected to metallic pipe. Now a transition union is available. The union consists of a metallic male threaded section, which joins a female threaded connection onthe metallic pipe.
On the other hand, this piping system is suitable for liquid handling. As industrial automation increases, the need for clean compressed air systems has increased. Black iron galvanized steel piping systems commonly used for compressed air generate rust, corrosion products, and other debris, which creates operational problems. If stainless steel copper piping systemsare used, these problems are minimizedor eliminated. However, the installed cost Df stainless steel copper becomes prohibitive. Chem-Aire ABS piping systems eliminate the problems of contamination in the line at a reasonable cost.