EQUIPMENT SPECIFICATION FORMS

Figure 10-186. Air-cooled equipment specifications form. (Used by permission Segel, K. D. Chemical Engineering Progress, V. 55, 1959. American Insistute of Chemical Engineers. All rights reserved.)...

Following is a listing of the equipment specification forms, included in this Appendix. The number appearing in italic is the page number on which the form appears. 

A suitable maintenance strategy should be developed for equipment by considering the criticality and failure mode, and then applying a mixture of the forms of maintenance described above. In particular, the long-term cost of maintenance of an item of equipment should be estimated over the whole life of the project and combined with its capital cost to select both the type of equipment and form of maintenance which gives the best full lifecycle cost on a discounted basis), while of course meeting the technical, safety and environmental specifications. 

Thermoformability is a property required by the many sheet materials used in the thermoforming industry. These properties are unique for the specific forming methods used, and are best determined by actual thermoforming tests on smaU-scale equipment. The softening or drape temperature of the material, residual stress in the sheet from its manufacture, and its melt strength and viscosity are important parameters relating to this use. 

Safety in operation of high-pressure units mainly means the protection of people and investment. Operation must be done so that nobody is harmed. Equipment specifications and installation plans must be in accord with any applicable codes or regulations. These may be in the form of State and/or local legislative rules. 

When completed, a specification form js a record of the salient features of the equipment, the conditions under which it is to operate, and its guaranteed performance. Usually it is ibe basis for a firm price quotation. Some of there forms are made up by organizations such as TEMA or API. but all large engineering contractor and many large operating companies have other forms for their own needs. A selection of specification form is in Appendix B. 

Application ranges of the various kinds of devices for maintenance of subatmospheric pressures in process equipment are shown in Table 7.3. The use of mechanical pumps—compressors in reverse— for such purposes is mentioned earlier in this chapter. Pressures also can be reduced by the action of flowing fluids. For instance, water jets at 40psig will sustain pressures of 0.5-2.0psia. For intermediate pressure ranges, down to O.lTorr or so, steam jet ejectors are widely favored. They have no moving parts, are quiet, easily installed, simple, and moderately economical to operate, and readily adaptable to handling corrosive vapor mixtures. A specification form is in Appendix B. 

Specification forms make provision for key data of the equipment and its position in the process, including design characteristics and required performance. A major purpose is a basis for price quotations by suppliers of the equipment. 

Unit process principles are used in the design of specific pieces of equipment. (Assistance with the design and selection of various types of process equipment is given in Chaps. 14 through 16.) Equipment specifications are generally summarized in the form of tables and included with the final design report. These tables usually include the following ... 

---