ASME B31.5:2019 pdf free download

ASME B31.5:2019 pdf free download.Refrigeration Piping and Heat Transfer Components.
refrigerant and refrigerant mixtures: the fluid used for heat transfer in a refrigerating system that absorbs heat during evaporation at low temperature and pressure and releases heat during condensation at a higher temperature and pressure. The safety classification group consists of two characters (e.g.. Al or B2). The capital letter indicates the toxicity and the arabic numeral indicates the flammability, based on the criteria in Tables 500,2-1 and 500.2-2.
refrigerating system: a combination of interconnecting refrigerant-containing parts constituting a closed refrigerant circuit in which a refrigerant is circulated for the purpose of extracting heat.
reinforcement of weld: weld metal In excess of the specified weld size.
root opening: the separation between the members to be joined, at the root of the joint.
root penetration: the depth a groove weld extends into the root of a joint measured on the centerline of the root cross section.
seal weld: any weld used primarily to provide a specific degree of tightness against leakage.
secondary coolant any liquid used for the transmission of heat without a change in its state.
self-contained system: a complete factory-made and factory-tested system in a suitable frame or enclosure that is fabricated and shipped in one or more sections and in which no refrigerant-containing parts are connected in the field other than by companion flanges or block valves.
semiautomatic arc welding: arc welding with equipment that controls only the filler metal feed. The advance of the welding Is manually controlled.
shall: where ‘shall” or “shall not” is used for a provision specified, that provision is intended to be a Code require. ment.
shielded metal-arc welding (SMAW): an arc welding process wherein coalescence is produced by heating with an electric arc between a covered metal electrode and the work. Shielding is obtained from decomposition of the electrode covering. Pressure Is not used, and filler metal is obtained from the electrode.
should: “should” or it is recommended” is used to indicate provisions that are not mandatory but recommended good practice.
size of weld:
equal le,q fillet weld: the leg lengths of the largest isosceles right triangle that can be inscribed within the fillet weld cross section.
groove weld: the joint penetration (depth of chamfering plus the root penetration when specified). The size of the groove weld and its effective throat are one and the same.