Maintenance Design practices

The ultimate responsibility for safety rests with me operating company OSHA 1910.119 is clear on this. Each company is expected to develop (and enforce) its own practices in the design, installation, testing, and maintenance of safety systems. Fortunately, some companies make these documents public. Monsanto s Safety System Design Practices was published in its entirety in the proceedings of the International Symposium and Workshop on Safe Chemical Process Automation, Houston, Texas, September 27-29, 1994 (available from... 

To avoid brittle fracture during operation, maintenance, transportation, erection, and testing, good design practice shall be followed in the selection of fabrication methods, welding procedures, and materials for vendor furnished steel pressure retaining parts that may be subjected to temperature below the ductile-brittle transition point. 

Road Safety Audit provides road safety engineers with an opportunity to feed their experience into the highway design process. Road Safety Audit should improve the awareness of safe design practices by all concerned in the design, construction and maintenance of roads. 

The HSE study demonstrates that attention to detail is essential in the design and management of SIF. Inadequate procedures, training, and MOC contribute to SIF failure as readily as random hardware failure. Improper operational or maintenance activities can completely disable an SIF, no matter how fault tolerant the SIF design. To combat these errors, operation and maintenance procedures should be clear and consistent with operator or maintenance technician expectations to reduce the potential for error. Back-checks and independent confirmation should be used to verify that the SIF is operational after any maintenance activity. Design practices can also reduce operator or maintenance technician errors that could potentially lead to failure. 

Design for a fixed life and plan to replace the part with a new one much like car manufacturers do with their maintenance schedules. This is sometimes called a so-called lifed part, finite lifetime concept [22], or safe-life design practice. 

By proper design practices to keep the feed stocks dry, and prescribed maintenance procedures to keep the equipment dry during shut-downs, there will be few corrosion problems with this catalyst... 

MaintainabiUty is a characteristic of design, installation, and operation, usually expressed as the probabiUty that a system can be restored to specified operable conditions within a specified interval of time when maintenance is performed in accordance with prescribed procedures. The ease of fault detection, isolation, and repair are all influenced by system design and are principal factors contributing to maintainabiUty. Also contributing is the supply of spare parts, the supporting repair organization, and preventative maintenance practices. MaintainabiUty must be designed into the equipment. Some factors to consider foUow. 

Air-eooled dry type and oil-immersed type This will depend upon the size of the reactor and the design of the manufacturer. The latest practice is to use aircooled dry type, which call for lesser maintenance and are free from any fire hazards. 

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