ASME B31.3-2010 PDF

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). filler material: 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.asme pdf 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)

(3) the design temperature is from fi29°C (fi20°F) through 186°C (366°F) (b) Category M Fluid Service: a fluid service in which the potential for personnel exposure is judged to be significant and in which a single exposure to a very small quantity of a toxic fluid, caused by leakage, can ASME B31.3-2010 produce serious irreversible harm to persons on breath- ing or bodily contact, even when prompt restorative measures are taken. (c)asme download Elevated Temperature Fluid Service: a fluid service in which the piping metal temperature has a design or sustained operating temperature equal to or greater than Tcr as defined in Table 302.3.5, General Note (b). (d) High Pressure Fluid Service: a fluid service for which the o