ASME PCC-2-2015 pdf download

ASME PCC-2-2015 pdf download.Repair of Pressure Equipment and Piping.
1 SCOPE This Standard provides methods for repair of equip- ment and piping within the scope of ASME Pressure Technology Codes and Standards 1 after they have been placed in service. These repair methods include relevant design, fabrication, examination, and testing practices and may be temporary or permanent, depending on the circumstances. The methods provided in this Standard address the repair of components when repair is deemed necessary based on appropriate inspection and flaw assessment. These inspection and flaw evaluation methods are not covered in this Standard, but are covered in other post- construction codes and standards. Only technical procedures and information are pro- vided; administrative or policy requirements are outside of the scope of this Standard. 2 ORGANIZATION This Standard is divided into five Parts. (a) Part 1 covers the scope, organization, and intent and is applicable to all articles in this Standard. Table 1 provides guidance for the applicability of repair meth- ods listed in this Standard. (b) Part 2 covers repair methods and techniques that include the use of welding, brazing, soldering, or other methods involving metal deposit. (c) Part 3 covers mechanical repairs, with or without sealant, such as bolted clamps or fixtures and includes all repair methods not covered in Part 2 or Part 4. (d) Part 4 covers repairs using nonmetallic means, such as nonmetallic liners and wraps, and bonding (e.g., joining by epoxy), including bonding of metallic components. 1 Equipment and piping within the scope of ASME Pressure Technology Codes and Standards includes piping (including pipe- lines) and piping components (such as valves), boilers, pressure vessels (including heat exchangers), and storage tanks. 1 (e) Part 5 covers examination and testing methods and techniques. 3 INTENT 3.1 General This Standard provides technical information, proce- dures, and recommendations for repair methods that were determined by consensus to be recognized and generally accepted good engineering practice. Where equipment repair is subject to jurisdictional regulation, jurisdictional approvals may be required. 3.2 Definitions The words may, shall, and should are used in the repair articles of PCC-2 and they have the following intent: may: indicates an action that is permitted, but not required. shall: an action that is mandatory. It indicates an action that is an essential element of the repair method that cannot be eliminated. should: an action that is not mandatory. It indicates an action that when performed, is generally considered to be good practice; however, there are some circumstances when the action is not appropriate or required, so the word should is used to provide flexibility for the article to covera broad rangeofcircumstances. Itis notmandatory unless so specified by others in the application of these articles. 3.3 Administrative Requirements For administrative requirements such as inspection, documentation, and quality control, the user is referred to an applicable post-construction code and to the juris- dictional requirements. In the absence of an applicable post-construction code or jurisdictional requirements, the owner of the pressure equipment or piping should establish the administrative requirements. A post-constructioncodeis one thatprovides requirements and guidance for inspection and/or repair of equipment after it has been placed in service, and may include the references to original code of construction. Examples of post-construction codes include NB-23, API 510, API 570, and API 653. 3.4 Application Users of the articles contained in this Standard are cautioned that these articles have been developed gener- ically and are recommended for general applications. They may not necessarily be suitable for all applications. Precautionary considerations are provided, but should not be considered all inclusive. Sound engineering prac- tices and judgment should be used to determine the applicability of a specific method or part of a method to a specific application. Each repair should be subject to an appropriate review by qualified personnel, and this review should consider subsequent deterioration of the repaired component. Some limitations and considerations are contained in section 2 of the individual articles. 3.5 Alternative Use While this Standard covers repairofequipmentwithin the scope of ASME Pressure Technology Codes and Standards, it may be used on equipment constructed in accordance with other Codes and Standards.