ASME B31.9 pdf free download

ASME B31.9 pdf free download Building Services Piping ASME Code for Pressure Piping, B31
(e] Temperature Limits. Piping systems with workingtemperatures not in excess of the following limits arewithin the scope of this Code:
(1) steam and condensate: 366°F (186°C)(2) other gases and vapors: 200°F (93c)
(3y other nonflammable liquids: 250°F (121°c)The minimum temperature for all services is 0°F(-18°C).
900.1.3 Exclusions. This Code does not apply to econ-omizers,heaters. pumps, tanks, heat exchangers, andequipment covered by the ASME Boiler and Pressurevessel Code (BPVC).
900.1.4 Units of Measure. This Code states values inboth Usc and sl units. Within the text, the Sl units areshown in parentheses. The values stated in eachsystem are not exact equivalents; therefore, eachsystem of units should be used independently of the other.when separate equations are provided for Usc and Slunits,those equations shall be executed using variables inthe units associated with the specific equation.The resultsobtained from execution of these equations may beconverted to other units.
when necessary to convert from one system of units toanother, conversion should be made by rounding thevalues to the number of significant digits of implied preci-sion in the starting value, but not less than four significantdigits for use in calculations.
900.2 Terms and Definitions
adhesive bond: a union of materials by means of an adhe-sive.
anchor: a structural attachment device or mechanism thatprevents the movement of pipe due to thermal expansion,expansion joint thrust, and other loads.
arc welding: a group of welding processes that producecoalescence of metals by heating them with an arc,with or without the use of filler metal.
assembly: the joining together of two or more pipingcomponents.
automatic welding: welding with equipment that performsthe welding operation without constant observation andadjustment of controls by a welding operator. The equip-ment may or may not perform the loading and unloadingof the work.
backing: material placed at the root of a weld joint tosupport molten weld metal.
backing ring: backing in the form of a ring.
ball or swivel joint: a joint that permits pipe motion bymeans of rotation.
base metal (materialy: the metal (material) to be welded,brazed, soldered, or cut.
boiler external piping (BEP): see para.900.1.2(b).