API RP 970-2017 pdf free download

API RP 970-2017 pdf free download.Corrosion Control Documents.
Typical CCDs cover the pressure-containing components of fixed equipment. The types of equipment and associated components typically covered by CCDs are: — pressure vessels, — process piping, — storage tanks atmospheric and pressurized, — process heaters pressurized components, and — heat exchangers. The following equipment is not typically covered by CCDs, but may be at the user’s option: — instrument and control systems, — pressure relief devices, — pressure vessel internals, — machinery components, — pump casings and valve bodies, — stacks/flues, — electrical systems, and — structural systems. However, these systems and components may be covered by other types of Risk-based Inspection (RBI) or risk assessment work processes, such as RCM. This recommended practice outlines the essential elements in defining, monitoring, and maintaining CCDs as a vital component of corrosion management (damage mechanism control strategies) and inspection planning, including RBI. This RP does not address process operating windows established for normal process control, for the purposes of maintaining product quality, or for other operating factors unrelated to control for the purpose of maintaining equipment integrity and reliability. However, the contents of a comprehensive, good quality CCD can be the basis for establishing Integrity Operating Windows (IOWs) in accordance with API RP 584. This RP is a guideline document for organizing Corrosion Control Documents. The owner/user of this RP may also develop internal documents that detail how their company will create and implement the processes suggested herein. Section 5 contains key points for establishing a site procedure that documents the CCD work process.
2 Normative References The following referenced documents are indispensable for the application of this document. For undated references, the latest edition of the referenced document applies. API 51 0, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping System API Standard 653, Tank Inspection, Repair, Alteration and Reconstruction API Recommended Practice 584, Integrity Operating Windows 3 Terms, Definitions, and Acronyms For the purposes of this document, the following terms, definitions, and acronyms apply. 3.1 alarm Primary method of communication for IOW Critical limit and some higher level IOW Standard limit exceedances. Typically, an audible sound (e.g. horn, buzzer, beep) along with a visual signal (e.g. flashing light) in the control room that alerts operators to a potential deviation in a process condition that may need immediate attention. 3.2 circuit A subsection of piping systems (see 3.24 for definition of “system”) that includes piping, equipment and components that are exposed to a process environment of similar corrosivity and expected damage mechanisms and is of similar design conditions and construction material where by the expected type and rate of damage can reasonably be expected to be the same. Some may refer to these as “loops” but this designation is being supplanted by the “system” or “circuit” designation. NOTE 1 Complex process units or piping systems may be divided into piping circuits to manage the necessary inspections, data analysis, and record keeping. NOTE 2 When establishing the boundary of a piping circuit, it may be sized to provide a practical package for record keeping and performing field inspection.
3.6 integrity operating window (IOW) Established limits for process variables (parameters) that can affect the integrity of the equipment if the process operation deviates from the established limits for a predetermined amount of time (includes Critical, Standard and Informational IOWs). Guidance on setting IOWs is given in API RP 584. 3.7 IOW critical limit An established IOW level which, if exceeded, could cause rapid deterioration such that the operator should take immediate predetermined actions to return the process variable to the acceptable IOW range to prevent significant defined risks of potential equipment damage or hazardous fluid release could occur in a short timeframe. Other terminology has been used in place of Critical Limit, such as Safe Operating Limit, Key Operating Limit, Standard Reliability Limit, or Reliability Operating Limit. 3.8 IOW standard limit An established IOW level, defined as one that if exceeded over a specified period of time, could cause increased damage rates or introduce new damage mechanisms beyond those anticipated. Since the timing of the impact from an exceedance of a Standard IOW Limit can vary significantly, the notification and response to an exceedance can vary. For higher risk exceedances, alarms or alerts are potentially needed and the operator may have some predetermined actions to take. For lower risk exceedances, alerts may only be needed for eventual interaction with operating supervisors or appropriate other technical personnel (SMEs). NOTE Other terminology for standard limits includes Key Operating Limit, Standard Reliability Limit or Reliability Operating Limit.