API RP 574-2009 pdf download
API RP 574-2009 pdf download.Inspection Practices for Piping System Components.
3.1.10 design temperature The temperature at which, under the coincident pressure, the greatest thickness or highest rating of a piping system component is required. NOTE Design temperature is equivalent to the design temperature, as defined in ASME B31.3 and other code sections, and is subject to the same rules relating to allowances for variations of pressure or temperature or both. Different components in the same piping system or circuit can have different design temperatures. In establishing this temperature, consideration should be given to process fluid temperatures, ambient temperatures, heating/cooling media temperatures, and insulation. 3.1.11 examination point An area defined by a circle having a diameter not greater than 2 in. (50 mm) for a line diameter not exceeding 10 in. (250 mm), or not greater than 3 in. (75 mm) for larger lines. 3.1.12 imperfection Flaws or other discontinuities noted during inspection that may be subject to acceptance criteria during an engineering and inspection analysis. 3.1.13 injection points Locations where relatively small quantities of materials are injected into process streams to control chemistry or other process variables. NOTE Injection points do not include the locations where two process streams join (mixing tees). 3.1.14 in service Piping systems that have been placed in operation as opposed to new construction prior to being placed in service. NOTE A piping system not in operation due to an outage is still considered an in-service piping system. 3.1.15 inspection plan A strategy defining how and when a piping system or piping circuit will be inspected, repaired, and/or maintained. 3.1.16 inspector Authorized piping inspector. 3.1.17 integrity operating envelope integrity operating window Established limits for process variables that can affect the integrity of the piping system if the process operation deviates from the established limits for a predetermined amount of time.
3.1.20 minimum alert thickness A thickness greater than the minimum required thickness that provides for early warning from which the future service life of the piping is managed through further inspection and remaining life assessment. 3.1.21 minimum required thickness The minimum allowed thickness at a CML. It is the larger of the pressure design thickness or the structural minimum thickness at a CML. It does not include thickness for corrosion allowance or mill tolerances. 3.1.22 mixing tees A piping component that combines two process streams of differing composition and/or temperature. 3.1.23 on-stream A condition where piping contains any amount of process fluid. 3.1.24 owner/user An owner or user of piping systems who exercises control over the operation, engineering, inspection, repair, alteration, testing, and rerating of those piping systems. 3.1.25 pipe A pressure-tight cylinder used to convey a fluid or to transmit a fluid pressure, ordinarily designated “pipe” in applicable material specifications. NOTE Materials designated “tube” or “tubing” in the specifications are treated as pipe when intended for pressure service. 3.1.26 piping circuit A piping circuit is a section of piping of which all points are exposed to an environment of similar corrosivity and which is of similar design conditions and construction material. 3.1.27 piping engineer One or more persons or organizations acceptable to the owner/user who are knowledgeable and experienced in the engineering disciplines associated with evaluating mechanical and material characteristics which affect the integrity and reliability of piping components and systems. NOTE The piping engineer, by consulting with appropriate specialists, should be regarded as a composite of all entities necessary to properly address a technical requirement.
3.1.29 pressure design thickness Minimum pipe wall thickness needed to hold design pressure at the design temperature as determined using the rating code formula. NOTE Pressure design thickness does not include thickness for structural loads, corrosion allowance or mill tolerances. 3.1.30 repair A repair is the work necessary to restore a piping system to a condition suitable for safe operation at the design conditions. 3.1.31 rerating A change in either or both the design temperature or the maximum allowable working pressure of a piping system. NOTE A rerating may consist of an increase, decrease, or a combination. Derating below original design conditions is a means to provide increased corrosion allowance. 3.1.32 risk-based inspection RBI A risk assessment and management process that is focused on inspection planning for loss of containment of pressurized equipment in processing facilities, due to material deterioration. NOTE These risks are managed primarily through inspection in order to influence the probability of failure. 3.1.33 small-bore piping SBP Pipe or pipe components that are less than or equal to NPS 2.
