Processing pipes

The factors fp and fj have not been applied to installation costs because installation costs are not a simple function of purchase cost. Although process piping and fittings made for the same unusual conditions are proportionally more expensive, labor, foundations, insulation, etc. are not. Furthermore, only about 70 percent of piping is directly exposed to process fluid. The balance is auxiliary or utility piping made of conventional materials. 

Reinforced furan resias have been used for many years in process piping and in underground sewer or waste-disposal systems. With a wide range in pH acceptability and good solvent resistance, furan piping has been a logical choice for many services. 

Glass Plants Components Process Pipe Fitting HardirarefJoining and Adaption, Coming QVE Pipe, QVE Coming, New York, 1989 to 1992. 

Product warehouse(s) Process pipe hues—steam, condensate, water, gas, fuel oil, air, fire, instru-... 

The bracket construc tion permits support of the exchanger without fixing the supports to the shell. This provides for thermal movement of the shells within the brackets and prevents the transfer of thermal stresses into the process piping. In special cases the brackets may be welded to the shell. However, this is usually avoided due to the resulting loss of flexibihty in field installation and equipment reuse at other sites and an increase in piping stresses. 

In recent years new ec]uipment has been invented, chemical processes, piping materials, valve designs, and new teehnologies not eonsidered when these formulas were developed with eold water in the 19th century. There is a need to measure the aetual losses onee an industrial plant is eommissioned and operations begin. I he authors of this book have developed a formula that permits the measurements of these losses in a live functioning system. Here it is ... 

Water flowed from the relief pipe (20 ft elevation) to tank E610. It first flowed through the jumper to the process pipe to the normally closed blow-down valve which was open (possibly inadvertently left open or failed to seat in the attempt to pressurize the tank). About 119 gallons of water flowed through this open blow-down valve, through another, normally open, isolation valve to enter tank E610, where it reacted with MIC. 

Investigate ways to reduce the potential tor external impacts to damage process piping while the alkylation unit is operating... 

Understanding of the technological process and identification of subprocesses are essential for proper ventilation design, especially when designing process ventilation but also in enclosure air technology. The purpose of process description is to identify possible emission sources, occupational areas, the effects of environmental parameters on production, needs for enclosure and ventilation equipment, etc. One purpose is to divide the process into parts such that their inputs and outputs (e.g., process, piping and duct connections, electricity, exposure) to environment can be defined. Parts here can he different departments, and inside them, subprocesses. See Fig. 3.4. 

Figure 13-11. Schematic of a relief system showing pressure vessels, relief voives, relief header, vent scrubber, and vent boom. Process piping has been omitted for clority.

Prevent process gas or liquid in process piping from entering conduit or cable systems. 

B. T. Matusz and D. L. Sadler, A Comprehensive Program for Preventing Cyclohexane Oxidation Process Piping Failures, Paper presented at AIChE Loss Prevention Symposium, Houston, Texas, Mar./Apr. 1993. 

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