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Chapter 7: Inspection, Evaluation,and Testing_ • Section 6 details the recommended practices for routine operational and external and internal condition examinations, internal and external inspections, maintenance of tanks, and recordkeeping.Tables 1 and 2 detail the type of observations,frequency, and associated personnel requirements for internal and external tank inspections. Records from these inspections should be retained with permanent equipment records. • Section 7 provides guidance for the alteration or repair of various tank components. API RP 12111 also contains nine appendices detailing the recommended requirements for qualified inspectors, sample calculations for venting requirements, observations regarding shell corrosion and brittle fracture, checklists for internal and external condition examinations and inspections, details regarding the minimum thickness of tank elements, and various figures and diagrams. 7.7.6 API 570 - Piping Inspection Code: In-Service Inspection, Rating, Repair,and Alteration, of Piping Systems API 570—Piping Inspection Code: In-Service Inspection, Rating, Repair, and Alteration, of Piping Systems (API 570)162 covers procedures for metallic and fiberglass reinforced plastic piping systems and their associated pressure relieving devices that have been in service.API 570 was developed for the petroleum refining and chemical process industries but may be used, where practical, for any piping system. In-service piping systems covered by API 570 include those used for process fluids, hydrocarbons, and similar flammable or toxic fluids. API states that this standard is not a substitute for the original construction requirements governing a piping system before it is placed in service.API 570 is intended for use by organizations that maintain or have access to an authorized inspection agency; a repair organization; and technically qualified piping engineers, inspectors, and examiners.The code is organized as follows: • Section 4 outlines responsibilities and associated procedures and qualifications.The owner/user of piping systems is responsible for the piping system inspection program, inspection frequencies, and maintenance of piping systems in accordance with this standard.The owner/user organization is also responsible for activities related to the rating, repair and alteration of its piping systems. • Section 5 addresses the specific inspection and pressure testing practices for in-service piping systems. • Section 6 addresses the frequency and extent of inspection of piping. Inspection intervals for piping are based on the forms of degradation possible and consequence of failure. Risk-based assessment may be used to determine inspection intervals or an interval can be established which takes into account the corrosion rate and remaining life calculations; piping service 162 API 570,"Piping Inspection Code:In-Service Inspection,Rating,Repair,and Alteration of Piping Systems,"3rd ed.,American Petroleum Institute,November 2009. SPCC GUIDANCE FOR REGIONAL INSPECTORS 7-69 December 16, 2013