Maximum allowable operating pressure

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)... 

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). 

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... 

Fig. 7.9 illustrates for a 10 bar and a 200 bar operated column, pie charts for the fractional cost associated with the solvent, packing, system, labor and lost crude. Although 200 bar is an unreasonable design pressure, it serves as a useful example. Values for the absolute cost ( /g) and the fractional cost %) for each category are adjacent to each section. As the maximum allowable operating pressure increases ... 

Fig. 7.8. Effect ol operating and design parameters on the maximum allowable operating pressure, (a) Flow rate (A) and plate count (c) versus maximum allowable operating pressure, (b) Loading (mg prtxluct/g packing) (A) and yield (c) versus maximum allowable operating pressure, (c) Column length (A) and cycle time (o) versus maximum allowable operating pressure, (d) Total cost ( /g) ( ) and production rate (d) vensus maximum allowable operating pressure.

Fig. 7.9. Cost contrihutions at two prcssittcs packing, solvent, lost crude, labor and system, (aj 10 bar, and (b) 200 bar maximum allowable operating pressure. Absolute cost S/g, etjst component, % fractional cost.

Change in class location confirmation or revision of maximum allowable operating pressure 192.611... 

Regulation 11 in the Pipelines Safety Regulations (1996) requires that the operator shall ensure that no fluid is conveyed in a pipeline unless the safe operating limits of the pipeline have been established. In order to meet this requirement, inspections will be carried out and analyses undertaken in order to determine the maximum allowable operating pressure (MAOP) for the subsea pipeline. Typically, the process for such an assessment will be undertaken in a manner as described by Hopkins et al. (2001) and shown in a flowchart in Figure 1.4. This process shows the progressive... 

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