DuPont Sabine River Works

The DuPont Sabine River Works had reported between 35,000 and 40,000 instrument installations and more than 5,000 safety interlocks and alarms in 1988. The interlocks and alarms are divided into two classifications the operator aid is used to alert the operator of a nonhazardous abnormal condition that might otherwise be undetected the safety interlock or alarm refers to any equipment whose proper functioning is essential to prevent or signal hazardous process conditions that may threaten personnel or equipment. [26]... 

Assigning prooftest frequencies for complex, safety-instrumentation loops requires sound engineering judgment for simple systems. For more complex, interlock systems, the frequency is a function of the tolerable hazard rates. For example, DuPont Sabine River Works (Orange, Texas) reported it had 35,000 instruments in service. Every safety interlock is... 

Hazardous Waste Management Practices at Industrial Facilities, 54 Dow Chemical Company Waste Management Experience, 55 DuPont Sabine River Works, 55... 

DuPont response to committee questions about industrial best practices, September 26, 2006. The DuPont Sabine River Works facility practicing incineration technology is located in the state of Texas. 

The E.I. du Pont de Nemours and Company (DuPont) Sabine River Works incinerator characterizes hazardous waste primarily using the facility waste analysis plan, which is required by RCRA the feed stream analysis plan, which is required by the Hazardous Waste Combustor Maximum Achievable Control Technology Standard or LDRs.29 The incinerator also must comply with the Occupational Safety and Health Administra-... 

The Sabine River Works of the DuPont Company Plant in Orange, Texas, shared their process interlock classification and test program in 1988. [26] At that time, this large DuPont chemical complex employed about 2,500 individuals and consists of large singletrain processing units. Most of the units are continuous processes for the manufacture of olefins, polyolefins, and chemical intermediates for nylon. 

DuPont s Sabine River Works experience shows that it is crucial to segregate the more critical interlocks from the others. A few well-understood, respected interlocks are said to be better than an overwhelming number of interlocks with the critical ones scattered amongst the others. DuPont s system allows a range of required authorizations. At DuPont, a supervisor may bypass less critical interlocks such as lubrication alarms for up to 24 hours for testing and repairs, but some of the more critical alarms may not be bypassed by anyone. 

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