ASME B31.9:2004 pdf free download

ASME B31.9:2004 pdf free download.Building Services Piping.
anchor: a structural attachment deviceor mechanism that prevents the movement of pipe due to thermal expansion, expansion joint thrust, and other loads.
arc welding: a group of welding processes that produce coalescence of metals by heating them with an arc, with or without the use of filler metal.
assenzblij: the joining together of two or more piping components.
aulomalic welding: welding with equipment that performs the welding operation without constant observation and adjustment of controls by a welding operator. The equipment may or may not perform the loading and unloading of the work.
backing: material placed at the root of a weld joint to support molten weld metal.
backing ring: backing in the form of a ring.
ball or swivel joint: a joint that permits pipe motion by means of rotation.
base metal (material): the metal (material) to be welded, brazed, soldered, or cut.
boiler external piping (BEP): See para. 900.1.2(b).
branch connection: the attachment of the end of a branch pipe to the run of a main pipe, with or without the use of a fitting. Figure 927.4.6 shows typical branch connections which do not use fittings.
braze welding: a joining process that produces coalescence of metals by using a filler metal whose liquidus is above 800>F (427°C) and below the solidus of the base metals. Unlike brazing, the filler metal is not distributed in thc joint by capillary attraction.
hra:ing: a joining process that produces coalescence of metals by heating to a suitable temperature and by using a filler metal whose liquidus is above 800°F (427°C) and below the solidus of the base metals. The filler metal is distributed by capillary attraction between closely fitted joint surfaces.
brine: a liquid used for the transmission of heat without change of state in cooling systems, which is nonflammable or has a flash point above 150°F (66°C) as determined by the method of ASTM D 93.
britlk failure: a pipe failure mode that exhibits no material deformation visible to the naked eye, i.e., stretching, elongation, or necking down, in the area of the break.
butt joint: a joint between two members aligned approximately in the same plane.
piping silstern: interconnected piping suhect to the same set or sets of design conditions.
porvsitV: cavity-type imperfections formed by gas entrapment during solidification of weld metal.
postheating, also called 1ktu’t’ld heal treatment (PWHT):
the application of heat to an assembly after a welding, brazing, soldering, cutting, or forming operation.
prehealing (PH): the application of heat to the base metal immediately before welding, brazing, soldering, cutting, or forming.
procedure: the detailed elements (with prescribed values or range of values) of a process or method used to produce a specific result.
procedure qualification: the demonstration that welds or other work produced by a specified procedure can meet prescribed standards.
purge gas: the replacement of air within a piping system with an inert gas; may be required by the welding procedure specification prior to making a gas tungsten arc weld.
qualification: See preferred terms, procedure qualficalion and welder performance qualification.
recommend: has the same effect as should.
reducing flame: an oxyfuel gas flame having a reduced effect due to excess fuel gas.
rc’inforcemt’nt: In branch connections, reinforcement is material around a branch opening that serves to strengthen it, The material is either integral in the branch components or added in the form of weld metal, a pad, a saddle, or a sleeve. In welding, reinforcement is weld metal in excess of the specified weld size.
rest raint: a structural attachment, device, or mechanism that limits movement of the pipe in one or more directions. See pipe alignment guide.
reverse polarily: the arrangement of direct current arc welding leads with the work as the negative pole and the electrode as the positive pole of the welding arc; a synonym for direct current electrode positive.