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ASME B31.9 Document Information:
Title
Building Services Piping
ASME International
Publication Date:
Jul 14, 2008
Scope:
Coverage and Application.
This Code Section has rules for the piping in industrial,
institutional, commercial, and public
buildings, and multi-unit residences, which does not require the range
of sizes, pressures, and
temperatures covered in B31.1. This Code prescribes requirements for
the design, materials,
fabrication, installation, inspection, examination, and testing of
piping systems for building
services. It includes piping systems in the building or within the
property limits.
Services and Limits
(a) Services. This Code applies to the following building services,
except as excluded in para.
900.1.3:
(1) water and anti-freeze solutions for heating and cooling
(2) condensing water
(3) steam or other condensate
(4) other nontoxic liquids
(5) steam
(6) vacuum
(7) compressed air
(8) other nontoxic, nonflammable gases
(9) combustible liquids including fuel oil
(b) Boiler External Piping. The scope of this Code includes boiler
external piping within the
following limits:
(1) for steam boilers, 15 psig (103 kPa gage) max.
(2) for water heating units, 160 psig (1 103 kPa gage) max. and
250°F (121°C) max.
Boiler external piping above these pressure or temperature limits is
within the scope of ASME
B31.1. Boiler external piping is the piping connected to the boiler
and extending to the points
identified in Fig. 900.1.2B.
(c) Material and Size Limits. Piping systems of the following
materials are within the scope of
this Code, through the indicated maximum size (and wall thickness if
noted):
(1) carbon steel: NPS 30 (DN 750) and 0.500 in. (12.7 mm) wall
(2) stainless steel: NPS 12 (DN 300) and 0.500 in. (12.7 mm) wall
(3) aluminum: NPS 12 (DN 300)
(4) brass and copper: NPS 12 (DN 300) and 12.125 in. (308 mm) O.D. for
copper tubing
(5) thermoplastics: NPS 24 (DN 600)
(6) ductile iron: NPS 18 (DN 450)
(7) reinforced thermosetting resin: 24 in. (600 mm) nominal
Other materials may be used as noted in Chapter III.
(d) Pressure Limits. Piping systems with working pressures not in
excess of the following limits
are within the scope of this Code:
(1) steam and condensate: 150 psig (1 034 kPa g)
(2) liquids: 350 psig (2 413 kPa g)
(3) vacuum: 1 atm external pressure
(4) compressed air and gas: 150 psig (1 034 kPa g)
(e) Temperature Limits. Piping systems with working temperatures not
in excess of the following
limits are within the scope of this Code:
(1) steam and condensate: 366°F (186°C)
(2) other gases and vapors: 200°F (93°C)
(3) other nonflammable liquids: 250°F (121°C)
The minimum temperature for all services is 0°F (-18°C).
Exclusions.
This Code does not apply to economizers, heaters, pumps, tanks, heat
exchangers, and equipment
covered by the ASME Boiler and Pressure Vessel (BPV) Code.
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