Prior implementation

The above example is a simple one, and it can be seen that the individual items form part of the chain in the production system, in which the items are dependent on each other. For example, the operating pressure and temperature of the separators will determine the inlet conditions for the export pump. System modelling may be performed to determine the impact of a change of conditions in one part of the process to the overall system performance. This involves linking together the mathematical simulation of the components, e.g. the reservoir simulation, tubing performance, process simulation, and pipeline behaviour programmes. In this way the dependencies can be modelled, and sensitivities can be performed as calculations prior to implementation. 

Because EPA was so slow in promulgating standards for HAPs prior to the 1990 Amendments, most states developed and implemented their own TAP control programs. Such programs, as well as the pollutants they regulate, differ widely from state to state. The ambient standards for a given substance are usually selected to be some small fraction of the TLV for that substance. 

Every developed nation has experienced product tampering incidents. The principal difference between domestic and foreign incidents is the motive of the tamperers. In the United States, typically random tampering without prior threat occurs whereas outside the United States, extortion prior to injury occurs, with money appearing to be the primary motive. Most developed nations are either implementing or modifying their rules on the use of tamper-evident packaging. Some features as they are used in the United States would have to be modified or the use of a secondary feature required to meet the standards of various other countries. 

While process design and equipment specification are usually performed prior to the implementation of the process, optimization of operating conditions is carried out monthly, weekly, daily, hourly, or even eveiy minute. Optimization of plant operations determines the set points for each unit at the temperatures, pressures, and flow rates that are the best in some sense. For example, the selection of the percentage of excess air in a process heater is quite critical and involves a balance on the fuel-air ratio to assure complete combustion and at the same time make the maximum use of the Heating potential of the fuel. Typical day-to-day optimization in a plant minimizes steam consumption or cooling water consumption, optimizes the reflux ratio in a distillation column, or allocates raw materials on an economic basis [Latour, Hydro Proc., 58(6), 73, 1979, and Hydro. Proc., 58(7), 219, 1979]. 

In recent decades the development of preconcentration steps to be implemented prior to analytical determinations of trace level compounds has been explored in considerable depth. With a view to eliminating or at least minimising the use of organic solvents used in conventional liquid-liquid extraction, other methodologies have been developed, such as membrane extraction, solid-phase extraction, solid-phase microextraction, etc. 

Implement procedures for leak/pressure testing of jacket, coil or heat exchanger prior to operation... 

Prepare and implement instructions to monitor level and fill rate during transfer and verify that vessel has sufficient free board prior to transfer... 

Implement testing of equipment prior to each use or change of service... 

Some of the pre-startup activities may need to be revisited when physical increases in volume and changes to equipment are planned. A PHA may need to be revalidated prior to implementing such a change to evaluate any secondary issues it could cause. 

If procedures were revised, were the revisions reviewed and Personnel informed of the changes prior to implementation ... 

Management of change A system to identify, review and approve all modifications to equipment, procedures, raw materials and processing conditions, other than replacement in kind, prior to implementation. 

Hazard and operability study prior to implementation (repeat when in use) Updating of all operating instructions, notices, procedures Removal/isolation of obsolete plant/lines Control of changes in personnel (see training)... 

The employer issues a hot work permit for hot work operations conducted on or near a covered process. The permit documents that the fire prevention and protection requirements in 29 CFR 1910.252(a) have been implemented prior to beginning the hot work operations it indicates the date(s) authorized for hot work and identifies the object on which hot work is performed. The permit is kept on file until completion of the hot work operations. 

Design changes shall have written customer approval or waiver prior to production implementation. This requirement, although removed, is implicit in the product approval requirements. 

Do obtain agreement to any repair instructions prior to being implemented. 

Combustible gas detection systems are frequently used in areas of poor ventilation. By the early detection of combustible gas releases before ignitible concentration levels occur, corrective procedures such as shutting down equipment, deactivating electrical circuits and activating ventilation fans can be implemented prior to fire or explosion. Combustible gas detectors are also used to substantiate adequate ventilation. Most combustible gas detection systems, although responsive to a wide range of combustible gases and vapors, are normally calibrated specifically to indicate concentrations of methane since most natural gas is comprised primarily of methane. 

Test the system prior to large-scale implementation... 

Implement Pilot Data Collection Exercise in Supportive Culture In order to ensure that the data collection system has been thoroughly checked and tested prior to its laimch, it is advisable to test it in a plant or plant area where there is likely to be a supportive culture. This will allow the effectiveness of the system to be addressed prior to a larger-scale implementation in a less controlled environment. 

In 1985, Uie Cimadian Chemical Producers Association (CCPA) released a pampWet entitled, "Essential Components of Safety Assessment Systems . Modifications to process or plant was one of the topics discussed in Uiis pamplilet. CCPA recommended a 12 element program (listed below) to formally e.xamine and approve process conditions whellier permanent or temporary prior to implementation. 

The planned maintenance program forms the basis of a system whereby an in-house department may prepare and implement its own maintenance program or introduce a trial system along similar lines. This would be prior to seeking the assistance of a consultant to provide guidance on the system that would satisfy the demands placed on the department by others and yet remain under the department s control. Irrespective of whether it is a manual or a computer system that is introduced, the elements of its... 

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