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The pipeline described in question 6.1 was used to carry wastewater to a hold-up tank. The effluent is not hazardous. A decision has to be made on what material to use to replace the pipe. Three suggestions have been made:
1. Replace with the same schedule carbon steel pipe and accept renewal at 3-year intervals.
2. Replace with a thicker pipe, schedule 80, outside diameter 114.3 mm (4.5 in), inside diameter 97.2 mm (3.826 in).
3. Use stainless steel pipe, which will not corrode.
The estimated cost of the pipes, per unit length is: schedule 40 carbon steel $5, schedule 80 carbon steel $8.30, stainless steel (304) schedule 40 $24.80. Installation and fittings for all the materials adds $16.5 per unit length. The downtime required to replace the pipe does not result in a loss of production. If the expected future life of the plant is 7 years, recommend which pipe to use.
The following sequences of reactions are to occur in a constant density reactor. Which type of continues flow-reactor would be best to maximize the selectivity for product C?
Handling operations for solid/powder substances are often a source of dust generation and are a source of exposure to hazardous substances in industries. Describe in details the measures that can be taken to prevent exposure during the following s..
Calculate the power factor for which the voltage regulation becomes zero on full load.
Calculate the molarity of each of the following aqueous solutions. a. 5.0 ppb Hg in H2O b. 1.0 ppb CHCl3 in H2O c. 10.0 ppm As in H2O d. 0.10 ppm DDT (C14H9Cl5) in H2O.
air at 4mpa and 3000c enters a will insulated turbine operating at steady state with negligible velocity. the air
The adipic acid plant described in Examples 9.5 and 9.9 is to be built in China, with a location factor of 0.85. The cost estimate needs to be updated from 2006 to 2012. Up to 45% of the total investment can be secured as a low-cost loan at an int..
Calculate equilibrium products at 500K for the reaction of 1 mole CO and 1 mole H2O according to the water-gas shift reaction (CO • H2O CO2 • H2) as a function of temperature four ways
Terephthalic Acid. (TPA) is produced by the reaction of p-Xylene. ,(PX) and Oxygen in the presence of a catalyst and solvent (S): Process conditions are provided for the Air entering the reactor and the reactor off gas.
A precipitate forms only when Na2SO4 is added. Which cations could be present in the unknown soluble ionic compound? Explain your answer, and write down any calculations you may have undertook in the process of answering it.
estimate the relative permeability µr at a flux density of 1 T for M-19and AISI 1020 materials.
A silicon diode is forward-biased with V = 0.5 V at a temperature of 293 K. If the diode current is 10 mA, calculate the saturation current of the diode.
Calculate the heat when 100.0 mL of 0.500 M HCl is mixed with 300.0 mL of 0.100 M Ba(OH)2. Assuming that the temperature of both solutions was initially 25.0C and that the final mixture has a mass of 400.0 g and a specific heat capacity of 4.18 J..
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