ASME B31.3-2010 pdf download.Process Piping ASME Code for Pressure Piping, B31.
300 GENERAL STATEMENTS (a) Identification. This Process Piping Code is a Section ofthe American Society ofMechanical Engineers Code for Pressure Piping, ASME B31, an American National Standard. It is published as a separate docu- ment for convenience of Code users. (b) Responsibilities (1) Owner. The owner of a piping installation shall have overall responsibility for compliance with this Code, and for establishing the requirements for design, construction, examination, inspection, and testing which will govern the entire fluid handling or process installation of which the piping is a part. The owner is also responsible for designating piping in certain fluid services and for determining ifa specific Quality System is to be employed. [See paras. 300(d)(4), (d)(5), (e), and Appendix Q.] (2) Designer. The designer is responsible to the owner for assurance that the engineering design of pip- ing complies with the requirements of this Code and with any additional requirements established by the owner. (3) Manufacturer, Fabricator, and Erector. The manu- facturer, fabricator, and erector of piping are responsible for providing materials, components, and workmanship in compliance with the requirements of this Code and of the engineering design. (4) Owner’s Inspector. The owner’s Inspector (see para. 340) is responsible to the owner for ensuring that the requirements of this Code for inspection, examina- tion, and testing are met. If a Quality System is specified by the owner to be employed, the owner’s Inspector is responsible for verifying that it is implemented. (c) Intent of the Code (1) It is the intent of this Code to set forth engi- neering requirements deemed necessary for safe design and construction of piping installations.
(4) Piping elements should, insofar as practicable, conform to the specifications and standards listed in this Code. Piping elements neither specifically approved nor specifically prohibited by this Code may be used provided theyare qualified foruse as setforthin applica- ble Chapters of this Code. (5) The engineering design shall specify any unusual requirements for a particular service. Where service requirements necessitate measures beyond those required by this Code, such measures shall be specified by the engineering design. Where so specified, the Code requires that they be accomplished. (6) Compatibility of materials with the service and hazards from instability of contained fluids are not within the scope of this Code. See para. F323. (d) Determining Code Requirements (1) Code requirements for design and construction include fluid service requirements, which affectselection and application of materials, components, and joints. Fluid service requirements include prohibitions, limita- tions, and conditions, such as temperature limits or a requirement for safeguarding (see para. 300.2 and Appendix G). Code requirements for a piping system are the most restrictive of those which apply to any of its elements. (2) For metallic piping not in Category M, High Pressure, or High Purity Fluid Service, Code require- ments are found in Chapters I through VI (base Code), and fluid service requirements are found in (a) Chapter III for materials (b) Chapter II, Part 3, for components (c) Chapter II, Part 4, for joints (3) For nonmetallic piping and piping lined with nonmetals, all requirements are found in Chapter VII. (Paragraph designations begin with “A.”) (4) For piping in a fluid service designated by the owner as Category M (see para. 300.2 and Appendix M), all requirements are found in Chapter VIII. (Paragraph designations begin with “M.”)
fabrication: the preparation of piping for assembly, including cutting, threading, grooving, forming, bend- ing, and joining of components into subassemblies. Fab- rication may be performed in the shop or in the field. face of weld: the exposed surface of a weld on the side from which the welding was done. face seal fitting: a High Purity Fluid Service fitting that incorporates two machined faces and a metallic gasket within an external/internal nut configuration to attain a high leak integrity seal. See also para. U315.3(b). fillermaterial: the material to be added in making metallic or nonmetallic joints. fillet weld: a weld of approximately triangular cross sec- tion joining two surfaces approximately at right angles to each other in a lap joint, tee joint, or corner joint. (See also size of weld and throat of a fillet weld.) flammable: for the purposes of this Code, describes a fluid which under ambient or expected operating condi- tions is a vapor or produces vapors that can be ignited and continue to burn in air. The term thus may apply, depending on service conditions, to fluids defined for other purposes as flammable or combustible. fluid service: a general term concerning the application of a piping system, considering the combination of fluid properties, operating conditions, and other factors that establish the basis for design of the piping system. See Appendix M. (a) Category D Fluid Service: a fluid service in which all the following apply: (1) the fluid handled is nonflammable, nontoxic, and not damaging to human tissues as defined in para. 300.2 (2) the design gage pressure does not exceed 1035 kPa (150 psi)