Drainage design considerations

Disposal of Drainage of Process Equipment Contents - When items of onsite process equipment are taken out of service, either individually during plant operation or for general turnaround, means of draining and safe disposal of the residual liquid hydrocarbon contents must be provided. The following are important considerations and terminology in the design ... 

Premature failure can also occur as a result of lack of attention to design. Facilities should, therefore, be provided for ventilatory drainage of water (rain, condensation, etc.), and all structures should be designed so as to permit ready access for repainting. Due consideration by architects and structural engineers at the design stage can indeed help to obviate certain of the causes of paint failure mentioned in this section (see also Sections 9.3 and 11.5). 

Perforated drainage pipes have the advantage of common usage and design, and they transmit fluids rapidly. They do, however, require considerable vertical space and are susceptible to particulate... 

Des%n of a Drainage System. The points tor be taken up in the design of a drainage system, in the order of their consideration, are as follows ... 

Lying between the broad belt of the eastern podzols and the westeni chernozem soils are the prairie soils, often designated as the Corn Belt soils. As would be expected, there are all gradations between the two groups on either side. Most of these prairie soils received enough rainfall for considerable leaching to occur and for the removal of the calcium into the drainage waters. Calcium deposits in the lower horizons are seldom... 

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