ASME SECTION X-2008 pdf download

ASME SECTION X-2008 pdf download

ASME has established procedures to authorize qualified organizations to perform various activities in accordance with the requirements of the ASME Boiler and Pressure Vessel Code. Itis the aimofthe Society to provide recogni- tion of organizations so authorized. An organization hold- ing authorization to perform various activities in accordance with the requirements of the Code may state this capability in its advertising literature. Organizations that are authorized to use Code Symbols for marking items or constructions that have been con- structedandinspectedincompliancewiththeASMEBoiler and Pressure Vessel Code are issued Certificates ofAutho- rization. Itis the aim ofthe Society to maintain the standing of the Code Symbols for the benefit of the users, the enforcement jurisdictions, and the holders of the symbols who comply with all requirements. Based on these objectives, the following policy has been established on the usage in advertising of facsimiles of the symbols, Certificates of Authorization, and reference to Code construction. The American Society of Mechanical Engineers does not “approve,” “certify,” “rate,” or “endorse” any item, construction, oractivity and there shall be no statements or implications that might so indicate. An organization holding aCode Symbol and/oraCertificate of Authorization may state in advertising literature that items, constructions, or activities “are built (produced or per- formed) or activities conducted in accordance with the requirements of the ASME Boiler and Pressure Vessel Code,” or “meet the requirements ofthe ASME Boiler and Pressure Vessel Code.” The ASME Symbol shall be used only for stamping and nameplates as specifically provided in the Code. However, facsimiles may be used for the purpose of fostering the use ofsuch construction. Such usage may be by an associa- tion or a society, or by a holder of a Code Symbol who may also use the facsimile in advertising to show that clearly specifieditems will carry the symbol. General usage is permitted only when all of a manufacturer’s items are constructed under the rules. The ASME logo, which is the cloverleaf with the letters ASME within, shall not be used by any organization other than ASME.
Creep, Stress–Rupture, and Temperature Effects 10 Fiber-reinforced plastic composite material (lami- nate) is not subject to creep or failure due to low stress- to-rupture characteristics as are some other materials. The material does, however, lose ultimate strength as the tem- perature is increased and gains strength but becomes more brittle as the temperature is lowered. Its low thermal con- ductivity and ablative properties are other factors signifi- cantly affecting the behavior ofthis material in the event of fire or other high-temperature environment. The maximum design, operating, and test temperatures of Class I vessels are set as follows: (a) 150°F (65°C) for design temperatures less than or equal to 150°F (65°C); (b) 250°F (120°C) or to within 35°F (19°C) ofthe glass transition temperature (whichever is lower) for design tem- peratures in excess of 150°F (65°C). The maximum design, operating, and test temperatures of Class II vessels are limited to an inside wall temperature of 250°F (120°C) or to within 35°F (19°C) of the glass transition temperature of the resin (whichever is lower). The minimum design temperature ofboth Class I and Class II vessels shall be −65°F (−54°C) (see RD-112). Fabrication 11 Many processes are used in the fabrication of fiber- reinforced composite materials (laminates). Class I vessels arelimitedtofourprocesses, namely, filamentwinding, bag molding, contact molding, and centrifugal casting. Class II vessels are limited to two processes, namely, filament winding and contact molding.
14 The general philosophy of Section VIII, Division 1, regarding inspection during fabrication is continued in this Section. Familiarity with the laminate production pro- cesses and the nature of vessel imperfections is required of the Inspector. Reliance is placed upon careful auditing of the Fabricator’s Quality Control Program, close visual inspection ofcompleted vessels by both Fabricator person- nel and the Inspector, and acceptance testing where required by this Section. 15 This Section requires thatall laminate andsecondary bonding work be without use of pigments, fillers, or resin putty mixtures except as permitted by the Procedure Speci- fication used in fabricating the vessel or vessel part. Liners 16 Liners may be used in Section X vessels as a barrier between the laminate and the vessel contents. Such liners shall not be considered part of the structural component of the vessel.

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