ASME B31.1-2020 pdf download

ASME B31.1-2020 pdf download.Power Piping.
Rules forthis CodeSectionhavebeendevelopedconsid- ering the needs for applications that include piping typi- cally found in electric power generating stations, industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems. 100.1.1 This Code prescribes requirements for the design, materials, fabrication, erection, examination, testing, inspection, operation, and maintenance of piping systems. Where service requirements necessitate measures beyond those required by this Code, such measures shall be specified by the engineering design. Piping as used in this Code includes pipe, flanges, bolting, gaskets, valves, pressure-relieving valves/ devices, fittings, and the pressure-containing portions of other piping components, whether manufactured in accordance with standards listed in Table 126.1-1 or specially designed. It also includes hangers and supports and other equipment items necessary to prevent over- stressing the pressure-containing components. Rules governing piping for miscellaneous appurte- nances, such as water columns, remote water level indi- cators, pressure gages, and gage glasses, are included within the scope of this Code, but the requirements for boiler appurtenances shall be in accordance with ASME Boiler and Pressure Vessel Code (BPVC), Section I, PG-60. The users of this Code are advised that in some areas legislation may establish governmental jurisdiction over the subject matter covered by this Code. However, any such legal requirement shall not relieve the owner ofhis/her inspection responsibilities specified in para. 136.1. 100.1.2 Power piping systems as covered by this Code apply to all piping and their component parts except as excluded in para. 100.1.3. Theyinclude butare notlimited to steam, water, oil, gas, and air services. (a) This Code covers boiler external piping as defined belowforpowerboilers andhigh-temperature, high-pres- sure waterboilers in which steam orvaporis generated at apressureofmorethan15 psig[100kPa(gage)]; andhigh- temperature water is generated at pressures exceeding 160 psig [1 103 kPa (gage)] and/or temperatures exceeding 250°F (120°C). Boilerexternal pipingshall be considered as pipingthat begins where the boiler proper terminates at (1) the first circumferential joint for welding end connections; or (2) the face of the first flange in bolted flanged connections; or (3) the firstthreaded jointin thattype ofconnection, and that extends up to and including the valve or valves required by para. 122.1. The terminal points themselves are considered part of the boiler external piping. The terminal points and piping external to power boilers are illustrated by Figures 100.1.2-1 through 100.1.2-8. Piping between the terminal points and the valve or valves required by para. 122.1 shall be provided with Data Reports, inspection, and stamping as required by ASME BPVC, Section I. All welding and brazing of this piping shall be performed by manufacturers or contrac- tors authorized to use the ASME Certification Mark and appropriateDesignatorsshowninASMECA-1,Conformity Assessment Requirements.
automaticwelding:weldingwithequipmentthatperforms the entire welding operation without constant observa- tion and adjustment of the controls by an operator. The equipment may or may not perform the loading and unloading of the work. backing ring: backingin the form ofa ringthatcan be used in the welding of piping. ball joint: a component that permits universal rotational movement in a piping system. base metal: the metal to be welded, brazed, soldered, or cut. branch connection: the attachmentofa branch pipe to the run of a main pipe with or without the use of fittings. braze welding: a method of welding whereby a groove, fillet, plug, or slot weld is made using a nonferrous filler metal having a melting point below that of the base metals, but above 840°F (450°C). The filler metal is not distributed in the joint by capillary action. (Bronze welding, the name formerly used, is a misnomer for this term.) brazing: a metal joining process wherein coalescence is produced by use of a nonferrous filler metal having a melting point above 840°F (450°C) but lower than that of the base metals joined. The filler metal is distributed between the closelyfitted surfaces ofthe jointbycapillary action. butt joint: a joint between two members lying approxi- mately in the same plane. capacitor discharge welding (CDW): a stud arc welding process in which DC arc power is produced by a rapid discharge of stored electrical energy with pressure applied during or immediately following the electrical discharge. The process uses an electrostatic storage system as a power source in which the weld energy is stored in capacitors. cold spring: the intentional movement of piping during assembly to produce a desired initial displacement and reaction. component:asusedinthis Code,is definedas consistingof, but not limited to, pipe, piping subassemblies, parts, valves, strainers, relief devices, fittings, pipe supports, and hangers.