MAWP maximum allowable working

MAWP = maximum allowable working pressure of a pressure vessel, psi gauge (or psi absolute if so specifically noted)... 

Accumulation The pressure increase over and above the MAWP (maximum allowable working pressure) during the discharge of the pressure relief device. Expressed in pressure units or as a percentage of set pressure. Maximum allowable accumulation is established by applicable codes for operating and fire contingencies (see Section 3.6). 

A Pressure Relief Device (not shown) is required by NFPA 86 (sect. 4-4.3.12) whenever it is possible to have an event leading to an oxygen supply pressure that is greater than the MAWP (maximum allowable working pressure) of any of the components or piping within the oxygen pipeline. The pressure relief device must be sized properly per manufacturer and industry standards. The outlet of the pressure relief device must be piped to a safe location per NFPA 86 (sect. 4-4.3.7). 

MAWP(maximum allowable working pressure) This is the legal maximum pressure that a process vessel is allowed to experience. Above this pressure, a relief valve should open to protect the vessel from catastrophic failure. 

Process heat exchangers are ASMS coded pressure vessels with a MAWP (Maximum Allowable Working Pressure), just like any other vessel, for both the shell and tube sides. However, they normally are... 

E = weld joint efficiency from original construction code if unknown, use 0.7 MAWP = maximum allowable working pressure, MPa (psi)... 

MAWP (maximum allowable working pressure) of a protected system EquipmeiU manufacturer makes an equipment per specified design pressure at design temperature, llie maximum pressure at the design temperature, which the final product can stand, is the MAWP. 

The code stipulates that when multiple valves are used, only one of them needs to be set at the maximum allowable working pressure (MAWP). The additional valves can be set at up to 105% of the MAWP. For design purposes the maximum allowable working pressure is assumed to be the same as the design pressure. 

A 3,500-gal reaetor with styrene monomer undergoes adiabatie polymerization after being heated inadvertently to 70°C. The maximum allowable working pressure (MAWP) of the reaetor is 5 bar absolute. Determine the relief vent diameter required. Assume a set pressure of 4.5 bara and a maximum pressure of 5.4 bara. Other data and physieal properties are given as follows [12] ... 

Maximum Allowable Working Pressure (MAWP) The maximum allowed pressure at the top of the vessel in its normal operating position at the operating temperature specified for that pressure. 

Like all pressure vessels, the cylinder has a maximum allowable working pressure (MAWP). The maximum allowable working pressure of the cylinder determines the setting of the relief valve that is downstream of the cylinder. The MAWP of the cylinder should be a minimum of 10% or 50 psi greater than its operating pressure. 

The design pressure for a vessel is called its Maximum Allowable Working Pressure (MAWP). In conversation this is sometimes referred to simply as the vessel s working pressure, The MAWP determines the setting of the relief valve and must be higher than the normal pressure of... 

Maximum allowable working pressure MAWP) Highest pressure to which the system can be subjected during operation. Thus, pressure is established by a relief device set pressure and must be less than or equal to the material strength limitations of equipment. This pressure e.stabli.sh-es piping class for fittings and pipe wall thickness requirements, both of which are discussed in Volume 1. 

Maximum Allowable Working Pressure (MAWP) the maximum pressure pounds per square inch gauge permissible at the top of a completed vessel in its operating position for a specific designated temperature corresponding to the MAWP pressure. This pressure is calculated in accordance with the ASME code (Par. UG-98) [1] for all parts or elements of the vessel using closest next larger to calculated value nominal thickness (closest standard for steel... 

Single pressure relief valve installation. Must be set to operate at a pressure not exceeding the maximum allowable working pressure of the vessel (MAWP), Ref [1] Par. UG-134, but may be set to operate at pressures below the... 

For a new installation, establish pressure vessel normal maximum operating pressure, and temperature, and then the safe increment above this for vessel design conditions and determine the maximum allowable working pressure (MAWP) of the new vessel. (Have qualified fabricator or designer establish this. See pretious discussion of topic.)... 

LP steam systems Operate below a maximum allowable working pressure (MAWP) of 15 psig (29.7 psia), equivalent to 249.8 °F (121 °C)... 

Safety valves are matched to a boiler s particular maximum allowable working pressure (MAWP), and a boiler failure may result if this pressure is greatly exceeded. Typically, boilers having more than 500 ft2 of surface area or exceeding more than 500 kW input are required to have two safety valves. 

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