More info
Description / Abstract:
This Practice describes the basic requirements for the design,
materials, fabrication, examination, inspection, and testing of
aboveground, welded, cylindrical shell, single-wall vessels having
an internal and external Maximum Allowable Working Pressure (MAWP)
not exceeding 15 psig at the top of the vessel in the normal
operating position. An additional specification may be required to
define options covered herein and other specific requirements
considering service (startup, normal operation, upset, shutdown),
location, maintenance, etc. The documents listed in Section 2.1
should be used for a complete purchase specification.
This Practice is not intended for flat-bottom tanks or API-type
field-erected storage tanks. Unless approved by Purchaser, this
Practice is not to be used for low-pressure vessels that will
contain "Lethal Substances" as defined in Code Paragraph
UW-2 Footnote 1.
Purpose
This Practice provides requirements for the construction of
low-pressure, welded vessels that generally must meet the
philosophy and requirements of Section VIII, Division 1 of the
ASME Boiler and Pressure Vessel Code (Code), but do not
require Code inspection or stamping. Vessels may be shop
or field fabricated.