Requirement changes

Catalyst is either degraded and requires changing or is lost from the reactor and cannot be recycled. 

Waste pretreatment Suspended solid less than 10 to 15 mg/L particle sizes equal to or less than 1 to 5 im (depends on the pressure may require changes in operating procedures. 

In the event of failures due to lubrication problems, the failures should be thoroughly analyzed to determine if they were indeed caused by lubricant failure or incorrect maintenance procedures. Once the problem has been isolated, corrective action can be initiated to prevent subsequent similar failures—whether it requires changing lubricants or procedures. 

The application may require changes by the vendor to allow specific community needs to be addressed. 

From this table one can see that all the additional requirements in ISO/TS 16949 were sourced from one or more of the four national quality system requirement documents. The location and wording of the requirements changed on incorporation into ISO/TS 16949. Many requirements from QS-9000 have been incorporated verbatim, whereas extracts from VDA, AVSQ, and EAQF were reworded so as to phrase the statements as requirements. 

The process heat duty is the heat required to be added or removed from the proce.ss fluids to create the required change in temperature. This can he in the form of sensible heat, latent heat, or both. 

Communications should be two-way, incorporating mechanisms (e.g., questionnaires, response cards, callback numbers, etc.) for soliciting feedback from the people receiving information. This is particularly true of communications that support initiatives like PSM that require cooperation and may require changes in working habits. 

At this point in the process, you may find it useful to review the preliminary plan you presented for initial management approval (see Chapter2). That "first take" necessarily lacked the detail you are now able to provide. For example, your initial estimates of time requirements might have predicted 18 months for system design and installation now you reali2e that 24 months will be needed. While the initial plan will require changes, it should have components (organizational, stylistic, narrative) that can be adapted for use in the formal plan. 

A fen can operate only along its characteristic curve, but after that fan is placed in a fixed system, it can operate only at the one point where pressure-volume conditions match the pressure-volume system curve calculated based on the system resistance, see Figure 12-134. Thus, if the fan characteristic curve is superimposed on the plot of the system, the point of intersection will be the point of operation. To change this point requires changing at least one condition on the fan or the system. 

The type of sprocket to be used depends entirely upon local or load conditions. The steel plate without hubs is the cheapest and is furnished for bolting to suitable hubs or flanges. The cast-iron or steel type fitted with hubs is made for direct mounting upon shaft and is fastened in place by either keys or setscrews or a combination of both. The split type is almost a necessity when the hub is mounted on a shaft with other pulleys or sheaves. Its construction facilitates installation and removal, but because of its extra cost it is usually not recommended except when solid hubs cannot be installed. The double-duty sprockets are made with steel rims or plates that may be removed or replaced without disturbing the hub, shaft, bearing, etc. Plates and hubs can be obtained either solid or split. They are particularly adapted for jobs requiring changing of drive ratios or where replacements must be made quickly. 

Conversion processes are either thermal, where only heat is used to effect the required change, or catalytic, where a catalyst lowers the reaction activation energy. The catalyst also directs the reaction toward a desired product or products (selective catalyst). 

Once the unit is running well, it is often assumed that the aeration system is sized properly, but changes in the catalyst physical properties and/or catalyst circulation rate may require a different purge rate. It should be noted that aeration rate is directly proportional to catalyst circulation rate. Trends of the E-cat properties can indicate changes in the particle size distribution, which may require changes in the aeration rate. Restriction orifices could be oversized, undersized, or plugged with catalyst, resulting in over-aeration, under-aeration, or no aeration. All these phenomena cause low pressure buildup and low slide valve differential. 

Finally, the useful life of an analytical column is increased by introducing a guard column. This is a short column which is placed between the injector and the HPLC column to protect the latter from damage or loss of efficiency caused by particulate matter or strongly adsorbed substances in samples or solvents. It may also be used to saturate the eluting solvent with soluble stationary phase [see Section 8.2(2)]. Guard columns may be packed with microparticulate stationary phases or with porous-layer beads the latter are cheaper and easier to pack than the microparticulates, but have lower capacities and therefore require changing more frequently. 

Size and Shape. The dimensions of the standard are more critical In the microenvironment than In the macroenvironment, since microscopic measurements commonly require changes In field apertures and magnification. If a microscopic standard has a small (/im-slzed), well-defined shape, such as a sphere or cylinder, an accurate Intensity/ volume relationship can be established, which should be Independent of the microscope optics. Standardization Is thus valid no matter what microscope parameters are employed, as long as the spectral characteristics of the standard and the sample are quite similar or Identical. 

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