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This specification covers the application, design, and materials for valve locking devices. According to the method of locking, these devices are classified into three types: Type I using a wire rope assembly, Type II using a handwheel latch, and Type III using a locking shield. These devices are also grouped into three grades depending on material composition: Grade A is made of stainless steel, Grade B is made of anodized aluminum, and Grade C is made of carbon steel. Locking devices Types I and II described in this specification are designed to secure the valve in a fully opened or completely closed position. Materials to be used in the manufacture of Type I valve locking device shall consist of pipe clamp, ring link, common wire strand, tiller rope clamp, rigid eye spring hook, and sleeve. As for Type II valve locking device, the materials shall consist of modified pipe clamp, flat head rivet, single-acting quick release pin, lanyard, sleeve, lanyard clip, and lever arm. Type III devices shall consist of plate, single-acting quick release pin, lanyard, sleeve, lanyard clip, and lockbar. The locking device must be able to lock the valve in both the fully opened and completely closed positions.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers the application, design, and materials for valve locking devices.
1.2 Locking devices Types I and II described in this specification are designed to secure the valve in a fully opened or completely closed position.
1.3 This specification does not apply to valves equipped with locking devices from the valve manufacturer, unless this standard is invoked in the procurement ordering data for the valve or its locking device, or both.
1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A36/A36M Specification for Carbon Structural Steel
A240 Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A492 Specification for Stainless Steel Rope Wire
A668/A668M Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric) B0209_B0209M
B580 Specification for Anodic Oxide Coatings on Aluminum
F708 Practice for Design and Installation of Rigid Pipe Hangers
Other DocumentsASME B18.1.1 Small Solid Rivets 7/16 Inch Nominal Diameter and Smaller Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://www.asme.org. AWS D1.1
ICS Number Code 47.020.30 (Piping systems)
UNSPSC Code 25111900(Marine craft systems and subassemblies)
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ASTM F993-21, Standard Specification for Valve Locking Devices, ASTM International, West Conshohocken, PA, 2021, www.astm.orgBack to Top