Appropriateness, engineering design

Uniform corrosion, which involves progressive and uniform thinning of the metal, is the simplest and commonest form of corrosion. With appropriate engineering design, it can be controlled relatively easily. 

Design the choice of appropriate engineering designs to support safety requirements. 

One must understand the physical mechanisms by which mass transfer takes place in catalyst pores to comprehend the development of mathematical models that can be used in engineering design calculations to estimate what fraction of the catalyst surface is effective in promoting reaction. There are several factors that complicate efforts to analyze mass transfer within such systems. They include the facts that (1) the pore geometry is extremely complex, and not subject to realistic modeling in terms of a small number of parameters, and that (2) different molecular phenomena are responsible for the mass transfer. Consequently, it is often useful to characterize the mass transfer process in terms of an effective diffusivity, i.e., a transport coefficient that pertains to a porous material in which the calculations are based on total area (void plus solid) normal to the direction of transport. For example, in a spherical catalyst pellet, the appropriate area to use in characterizing diffusion in the radial direction is 47ir2. 

Performing a checklist analysis requires access to engineering design procedures and operating practices manuals and must be performed by a team with appropriate expertise. An experienced manager or staff engineer should review the results and direct follow-up actions. 

In-process examination in accordance with para. IP-10.5.1(c)(8), supplemented by appropriate nondestructive examination, may be substituted for the examination required in (b) above on a weld-for-weld basis if specified in the engineering design or specifically authorized by the Inspector. 

It is also important to note that molecular biology, while it is a very powerful tool, is probably most effective in industrial process development when used in conjunction with other techniques such as enzyme formulation, immobilization and appropriate process design engineering. ... 

In the majority of cases, the application of a computer system to pharmaceutical manufacturing is part of a capital investment involving other items of production plant equipment and a wide range of contracted design, installation, and commissioning activities carried out by appropriate engineering disciplines. 

The equipment and process(es) should be designed and/or selected so that product specifications are consistently achieved. This should be done with the participation of all appropriate groups concerned with assuring product quality, e.g., engineering design, production operations, and quality assurance personnel. 

Any engineering design, particularly for a chemical process plant, is only useful when it can be translated into reality by using available materials and fabrication methods. Thus, selection of materials of construction combined with the appropriate techniques of fabrication can play a vital role in the success or failure of a new chemical plant or in the improvement of an existing facility. 

Liquid methanol is to be burned with 100% excess air. The engineer designing the furnace must calculate the highest temperature that the furnace walls will have to withstand so that an appropriate material of construction can be chosen. Perform this calculation, assuming that the methanol is fed at 25 C and the air enters at 100 C. 

Pending the development of appropriate mechanistic theoretical modeling, semi-empirical models derived from dedicated constant amplitude and variable amplitude tests are the most likely to lead to engineering design rules. 

---