Maintenance machines

Machine hop. A large nachine shop is planned to take care of all maintenance, machining, equipment rework, and the bulk of original machine work necessary for the projects on the Reactor Testing Station. 

Incidental variables - Spills, equipment maintenance, machine breakdowns, leaks, accidental mixing of chemicals, operator errors... 

Usage % Capacity % used Space occupied Down time (repairs, service/maintenance) Machine cost (capital cost/depreciation or lease cost) Set up time... 

JDAsprey, Team Leader Track Maintenance Machines, BR Research... 

Accurate absolute position control is virtually impossible to achieve with a smoothing system because track geometry errors, ahead of the maintenance machine, will feed into the front reference (ie. the front of the chord) and influence subsequent slues and lifts. This may be a particular problem when attempting to negotiate tied points. 

French railways is mechanising this operations on a large scale by placing one multi purpose track maintenance machine EMV 93 at every district. 

FIG. B-34 VHBK130 fitted in a test stand for testing the hydrostatic chive system of sid siope maintenance machines in West Germany. (Source J.iM. Vbith GmbH.)... 

Services. These iaclude telephone system FAX machines mail moves deUveries tmcks and vehicle fleet management janitorial and housekeepiag services landscapiag and gardening water treatment and waste disposal reproduction, eg, copyiag machines, blue-line machines, and printing furniture control tool rental and maintenance and instmment rental and caUbration. 

Manufacturing Engineering. Industrial engineering, equipment engineering, production-machine maintenance, iastmmentation engineering and maintenance, tooling and operation of machine shop, chemical and environmental engineering, and the technical Hbrary are within this area. 

Corrosion. Anticorrosion measures have become standard ia pipeline desiga, coastmctioa, and maintenance ia the oil and gas iadustries the principal measures are appHcation of corrosion-preventive coatings and cathodic protection for exterior protection and chemical additives for iaterior protectioa. Pipe for pipelines may be bought with a variety of coatiags, such as tar, fiber glass, felt and heavy paper, epoxy, polyethylene, etc, either pre-apphed or coated and wrapped on the job with special machines as the pipe is lowered iato the treach. An electric detector is used to determine if a coatiag gap (hoHday) exists bare spots are coated before the pipe is laid (see Corrosion and corrosion control). 

Industrial and institutional floor care demands poHshes that accommodate the needs of machine-centered maintenance. The development of machines that buff or burnish with rotational speeds from 1000 to 2000 rpm has produced poHsh formulations that are balanced to accommodate the process (32—36). 

Under mechanical and environmental stresses, composites are dimensionally stable. They maintain their shape and functionaHty, a critical requirement in such appHcations as dish antennas, constmction girders, and in appHance and business machines. Color and surface texture can often be molded into an FRP product for long lasting, low maintenance permanent surface appearance. Boats are a good example. The surface color is molded in and requires minimum maintenance, an advantage in saltwater environments. 

The effect of World War 11 was very drastically felt in the sugar industry. Raw materials, machine parts, and maintenance items needed to maintain sugar processing were diverted to the war industry. Many sugar industry experts were conscripted into the armed forces. In the European theater of war, factories and agriculture were destroyed. At the end of World War 11 sugar production barely totalled 19,162,000 t/yr. 

Maintenance shops—electric, piping, sheet metal, machine, welding. Raw-material and finished-product handling equipment—elevators, hoists. 

In selec ting the machines of choice, the use of specific speed and diameter best describe the flow. Figure 10-67 shows the characteristics of the three types of compressors. Other considerations in chemical plant service such as problems with gases which may be corrosive or have abrasive solids in suspension must be dealt with. Gases at elevated temperatures may create a potential explosion hazard, while air at the same temperatures may be handled qmte normally minute amounts of lubricating oil or water may contaminate the process gas and so may not be permissible, and for continuous-process use, a high degree of equipment rehability is required, since frequent shutdowns for inspec tion or maintenance cannot be tolerated. 

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