Abstract： ASME B31.9:2004 pdf download.Building Services Piping. assembly: the joining together of two or more piping components. automatic welding: welding with equipment that performs the welding operation without constant observation and adjustmen...

ASME B31.9:2004 pdf download.Building Services Piping.

assembly: the joining together of two or more piping components.

automatic 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 pipisi (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 pn’ess that produces coalescence of metals by using a filler metal whose liquidus is above 8O0F (427°C) and below the solidus of the base metals. Unlike brazing, the filler metal is not distributed in the joint by capillary

attraction.

brazing: 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 (66cC) as determined by the method of ASTM D 93.

brittle 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.

Recommended：