Provisions for a lockable device are permitted even when it is not specifed in the purchase order. The lockable device shall be designed such that a lock with an 8 mm ( 5 /16 in.) diameter shank, not more than 100 mm (4 in.) long, can be inserted directly through appropriate holes and locked. 5.1.5 Lockable Device When specifed in the purchase order, valves shall be furnished with a lockable device that accepts a purchaser- supplied lock that enables the valve to be locked in both the open and closed positions. 5.1.4 Cryogenic Service Valves required to operate in cryogenic service shall meet the additional requirements specifed in ANSI/MSS SP-134. Fugitive emission test report shall be made available to purchaser upon request. 5.1.3 Fugitive Emissions Tested Valves If the purchaser specifes fugitive emission valves, the valve’s design shall have been type tested and certifed to meet all performance requirements of API 641. Fire test report shall be made available to purchaser upon request.
5.1.2 Fire-tested Valves If the purchaser specifes fre-tested valves, the valve’s design shall have been type tested and certifed to meet all performance requirements of API 607. In the event of a confict between ASME B16.34 and this standard, this standard shall prevail. For materials not listed in ASME B16.34, the applicable requirements and design rules of ASME B16.34 shall be used. 3.6 shell Comprises the body, cover, bonnet, bonnet extension, and seat retainer that constitutes the pressure boundary of an API 609 valve (see Annex C).ĥ.1.1 Category B Valves Valves manufactured in accordance with this standard shall meet the requirements of ASME B16.34 for Standard class and any additional requirements as specifed in this standard. 3.5 pressure boundary element Comprises the shell and related bolting that forms a part of the pressure boundary (see Annex C). The dimensionless size identifcation number does not represent a measurable value and is not used for calculation purposes. The dimensionless number may be used as a valve size identifer without the prefx “NPS”. 3.4 NPS An alphanumeric designation of size that is common for components used in a piping system, used for reference purposes, comprising the letters “NPS” followed by a dimensionless number indirectly related to the physical size of the bore or outside diameter of the end connection as appropriate. 3.3 dead-end? service A condition that may occur after the companion fange and/or piping are removed from one side of a valve. 3.2 cryogenic? service Unless a diferent temperature is specifed by the purchaser, valves required to operate at or below −73 ☌ (−100 ☏) are in cryogenic service.
The allowable pressure for a valve having a class number depends on the valve material and its application temperature and is found in tables of pressure-temperature ratings. The number following the letters “Class” does not represent a measurable value and is not used for calculation purposes except where specifed in this standard. It comprises the letters “Class” followed by a dimensionless whole number.
3.1 Class An alphanumeric designation that is used for reference purposes relating to valve pressure-temperature capability, taking into account valve material mechanical properties and valve dimensional characteristics.
#API 609 CATEGORY B PDF PDF#
API St 609:2021 pdf download.Butterfy Valves: Double-fanged, Lug- and Wafer-type, and Butt-welding Endsįor the purpose of this document, the following terms and defnitions apply.
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