Gaskets mechanical requirements

Not in-kind Ensure that the replacement satisfies the require-replacements (e.g., ments of duty gaskets, rupture, Implement management of change review disks, packing, mechanical seals) resulting in failure. Possibility of hazardous release. CCPS G-22 CCPS G-27 CCPS Y-28 OSHA 1910.119... 

Gasket. The gland-to-seal chamber gasket or 0-ring used for mechanical seals shall be confined on the atmospheric side to prevent blowout. It is acceptable for cartridge seals to pilot off of the shaft and not require a register fit to the seal chamber. 

Mechanical failures occur when the part is exposed to some t5q)e of force that exceeds its capability. A part may be exposed to three different t5q)es of forces tensile, compression, and vacuum-generated stresses. Many processes require super- or subatmo-spheric pressure. In a fluoropol5mier-Iined vessel or a stand-alone vessel at elevated pressure, the walls are subjected to tensile stress. Compression stress develops in parts such as seals and gaskets where force is applied to the part, for instance, by placing it between bolted flanges. Vacuum can be a permanent or transient feature of a process and subjects a part to complex forces which could be a combination of tensile and compression. 

Other encapsulation applications of polymers for specific designs Include soil, ultraviolet, and abrasion-resistant front covers. The cover can serve as a transparent structural superstrata. Substrate support designs require a hard, durable front cover film to protect the relatively soft pottant from mechanical damages and excess soil accumulation. A polymeric front cover must be low In cost, highly transparent, and weather resistant to compete with glass. For applications out of the optical path between the sun and the solar cells (adhesives. Insulation, edge seals, gaskets) requirements for polymeric use In encapsulation are the same as for other applications. 

Caution There are chances of fire due to the circulating high-temperature oil, and hence, the motors, electrical fittings, and lighting must be flameproof. The pipelines, valves, gaskets, and pumps (with mechanical shaft seals) must he selected for high-temperature and high-pressure service and shall he tested as per statutory requirements. 

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