ASME B31.9:2020 pdf free download

ASME B31.9:2020 pdf free download.Building Services Piping.
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 927.4.6-1 shows typical branch connections that 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 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 (66°C) as determined by the method of ASTM D93.
brittle failure: a pipe failure mode that exhibits no material deforniation visible to the naked eye, e.g., stretching, elongation, or necking down, in the area of the break.
butt joint: a joint between two members aligned approximately in the same plane.
chilled water: water or an antifreeze solution used as a brine at a supply temperature below 60°F (16°C).
coalescence: the growing together or growth into one body of materials being welded, brazed, or soldered.
combustible liquid: a liquid having a flash point at or above
100°F (38°C).
consumable insert: backing in the form of filler metal that is melted into the root of the weld and fused with the base metals.
contractor: the entity responsible for fabrication and installation of piping and associated equipment.
crack: a fracture-type imperfection characterized by a sharp tip and high ratio of length and depth to opening displacement.
DN: metric designated pipe size. The number is the millimeter approximation of the inch pipe size using I in. equal to 25 mm. The pipe Is still manufactured in Inch sizes.
defect: an imperfection that by nature or accumulated effect renders a part of the piping unable to meet minimum applicable acceptance standards or specifications. A defect is cause for rejection.
deposited mewl: filler metal that has been added during a welding operation.
design pressure: the pressure, equal to or greater than the highest working pressure, used to determine the minimum permissible wall thickness or component rating. See para. 901.2.