ASME B31.3:2004 pdf download Chapter I Scope and Definitions
300GENERAL STATEMENTS
(a) Identification. This Process Piping Code is a Section of the American Society of Mechanical EngineersCode for Pressure Piping，ASME B31,an AmericanNational Standard. It is published as a separate docu-ment for convenience of Code users.(b) Responsibilities
(1) Owner The owner of a piping installation shallhave overall responsibility for compliance with thisCode and for establishing the requirements for design,construction,examination,inspection, and testingwhich will govern the entire fluid handling or processinstallation of which the piping is a part. The owner isalso responsible for designating piping in certain fluidservices and for determining if a specific Quality Systemis to be employed.[See paras. 300(d)(4),(d)(5), (e), and
Appendix Q](2) Designer. The designer is responsible to theowner for assurance that the engineering design of piping complies with the requirements of this Code andwith any additional requirements established by theowner.
(3) Manufacturer, Fabricafor, and Erector. The manu-facturer, fabricator, and erector of piping are responsiblefor providing materials, components, and workmanshipin compliance with the requirements of this Code and
of the engineering design.(4) Owner’s Inspector. The owwner’s Inspector (seepara. 340) is responsible to the owner for ensuring thatthe requirements of this Code for inspection, examina-tion, and testing are met. If a Quality System is specifiedby the owner to be employed, the owner’s inspector isresponsible for verifying that it is implemented.(c) Intent of the Code
(1) It is the intent of this Code to set forth engineering requirements deemed necessary for safe designand construction of piping installations.
(2) This Code is not intended to apply to the opera-tion, examination, inspection, testing,maintenance,orrepair of piping that has been placed in service. Theprovisions of this Code may optionally be applied forthose purposes, although other considerations may alsobe necessary
(3) Engineering requirements of this Code, whileconsidered necessary and adequate for safe design, generally employ a simplified approach to the subject. Adesigner capable of applying a more rigorous analysis shall have the latitude to do so; however, the approachmust be documented in the engineering design and itsvalidity accepted by the owner. The approach used shallprovide details of design, construction, examinationnspection, and testing for the design conditions of para301, with calculations consistent with the design criteriaof this Code.
(4) Piping elements should, insofar as practicableconform to the specifications and standards listed inthis Code. Piping elements neither specifically approvednor specifically prohibited by this Code may be usedprovided thev are qualified for use as set forth in applica-ble Chapters of this Code.
(5) The engineering design shall specify anyunusual requirements for a particular service.Whereservice requirements necessitate measures beyond thoserequired by this Code, such measures shall be specifiedby the engineering design. Where so specified, the Coderequires that they be accomplished.
(6) Compatibility of materials with the service andhazards from instability of contained fluids are notwithin the scope of this Code. See para. F323.(d) Defermrining Code Requiremients
(1) Code requirements for design and constructioninclude fluid service requirements, which affect selectionand application of materials, components, and jointsFluid service requirements include prohibitions, limitations, and conditions, such as temperature limits or arequirement for safeguarding (see para. 300.2 andAppendix G). Code requirements for a piping systemare the most restrictive of those which apply to any ofits elements.
(2) For metallic piping not in Category M or highpressure fluid service, Code requirements are found inChapters I through VI (the base Code), and fluid servicerequirements are found in
(a) Chapter Ill for materials(b) Chapter Il, Part 3, for components(c) Chapter Il, Part 4, for joints
(3) For nonmetallic piping and piping lined withnonmetals, all requirements are found in Chapter VIl(Paragraph designations begin with “A”)
(4) For piping in a fluid service designated by theowner as Category M(see para.300.2 and Appendix M)all requirements are found in Chapter VIIl.(Paragraphdesignations begin with “M.”)
(5) For piping in a fluid service designated by theowner as Category D (see para. 300.2 and Appendix M)