Arrangement and Location

The method used to support a vessel will depend on the size, shape, and weight of the vessel the design temperature and pressure the vessel location and arrangement and the internal and external fittings and attachments. Horizontal vessels are usually mounted on two saddle supports see Figure 13.20. Skirt supports are used for tall, vertical columns see Figure 13.21. Brackets, or lugs, are used for all types of vessels ... 

The location and arrangement of the crystallizer feed determines, to a large extent, how well the feed will mix into the bulk. As discussed above, this will have a great impact on the overall nucleation and growth rates, and on the uniformity of crystal growth of the entire process. Therefore, it behooves us to choose feed configurations with care ... 

Neutron reflection from fluid interfaces has revealed detailed arrangements of molecules in adsorbed layers (Lu et al., 2000). Basically neutrons can be totally reflected from interfaces in a manner similar to the total internal reflection of light at interfaces where a suitable refractive index distribution exists. Qose to the critical angle for total reflection, the intensity of the weak scattered beam provides information on the refractive index distribution normal to the interface. For neutrons, a refractive index can be defined in terms of the density of the various nuclei present and their scattering cross sections. As in neutron scattering, the use of ordinary and deuterated compounds is a powerful tool in identifying the location and arrangement of molecules. 

Paragraph (c) of 1926.962 does not require grounding methods to meet the criteria embodied in these principles. Instead, the paragraph requires that protective grounds be placed at such locations and arranged in such a manner that the employer can demonstrate will prevent exposure of each employee to hazardous differences in electric potential. However, when the employer s grounding practices do not follow these two principles, the employer will need to perform an engineering analysis to make the demonstration required by 1926.962(c). 

Each means for disconnecting motors and appliances should be legibly marked to indicate its purpose, unless located and arranged so the purpose is evident. These markings should be durable. 

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