Maximum allowable operating

With the flare tip and flare seal pressure drop and flare elevation fixed, the flare stack, headers and laterials are sized for the largest release, while not exceeding the maximum allowable operating pressure on the associated blowdown drums and water disengaging drums. These maximum allowable operating pressures are in turn determined by ... 

The maximum allowable operating pressure in the blowdown drum is determined by the lowest of the following ... 

Fault rates were found based on service, and maximum allowed operating pressure. 

When such studies indicate the facility is in unsatisfactory condition, a planned program shall be initiated to abandon, replace, or recondition and proof test. If such a facility cannot be reconditioned or phased out, the maximum allowable operating pressure shall be reduced commensurate with the requirements described in Part PL. 

Class Buildings Class Buildings Maximum Allowable Operating Pressure (MAOP)... 

Sm is the maximum allowable operating stress, calculated as specified minimum yield strength x Hf, where Hf is the material performance factor from Mandatory Appendix IX, Table IX-5A or IX-5B. Material performance factors account for the adverse effects of hydrogen gas on the mechanical properties of carbon steels used in the construction of pipelines. 

PL-3.13.4 Maximum Allowable Operating Pressure for High-Pressure Distribution Systems... 

A cavity s maximum storage capacity is almost proportional to its Maximum Allowable Operating Pressure (MAOP). MAOP is fixed by tightness considerations, which in theory at least, are based on the impermeability (and plasticity limit) of the salt rock to hydrocarbons when pressure remains lower than stresses equal to the weight of the overburden (approximately 0.023 MPa per meter depth). 

In most of the industrial applications, several DLCs are connected either in series or in series/ parallel. They are generally subjected to very high currents. Consequently, the heat produced by Joule effect must be dissipated with cooling systems like fans or air distribution channels. The choice of the cooling system depends on the level of the heat transfer coefficient and the maximum allowed operating temperature. The chosen cooling system should be sufficient to keep the DLC temperature at a tolerable temperature level which leads to a longer lifetime. 

If a breakthrough of CO occurs from the LTS converter or a breakthrough of CO2 from the absorption system occurs, the intensely exothermic methanation reaction can reach temperatures that exceed 500°C. Controls should be installed and other measures taken to avoid these high temperatures because tlie catalyst may be damaged or the maximum allowable operating temperature of the pressure vessel may be exceeded74. 

With pressure vessels for anhydrous ammonia (maximum allowable operating pressure about 2.5 MPa)... 

With vessels designed for elevated pressure for high-concentration aqueous ammonia (maximum allowable operating pressure in accordance with the ammonia content up to 1.6 MPa). 

Fig. 7.8 illustrates in four graphs how the optimum linear velocity, optimum d /L, optimum column length, optimum dimensionless loading, resulting plate count, yield, cycle time, cost per gram ( /g) and production rate (kg/yr) vary with the maximum allowable operating pressure for a 30 cm ID column. As the maximum allowable... 

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