The American Petroleum Institute – API – represents more than 400 members involved in the oil and natural gas industry. API Spec 6D is the API Specification for Pipeline Valves.
This International Standard specifies requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for application in pipeline systems. The specification covers both the design, manufacture, testing and documentation standards. API Specification 6D is an adoption of ISO 14313: 1999, Petroleum and Natural Gas Industries-Pipeline Transportation Systems-Pipeline Valves.
Flow and Control Engineering offers several valves that are designed and tested in accordance with the API 6D Spec:
API 6D Ball Valves:
“Ball valves shall have a spherical obturator that rotates on an axis perpendicular to the direction of flow.”*
Walworth Trunion Mounted Ball Valves – 2″ to 60″, 150#-2500#, RF, RTJ or BW, Bolted or Welded Body
API 6D Plug Valves:
“Plug valves shall have a cylindrical or conical obturator that rotates about an axis perpendicular to the direction of flow.”*
Walworth Steel Lubricated Plug Valves Bottom entry in Short, Regular or Venturi Pattern. Top Entry in Short, Regular or Venturi Pattern. Gas Service Steel Plug Valve in Short Pattern.
API 6D Gate Valves:
“Gate valves shall have an obturator that moves in a plane perpendicular to the direction of flow. The gate can be constructed of one piece for slab-gate valves or of two or more pieces for expanding-gate valves. Gate valves shall be provided with a back seat or secondary stem sealing feature in addition to the primary stem seal. “*
Walworth Slab Gate Valves – 2″-48″, 150#-1500#, RF, RTJ or BW
Walworth Expanding Gate Valves – 2″48″, 150#-2500#, RF, RTJ or BW
* API-6D Standards
Please visit http://www.api.org/publications-standards-and-statistics to search for and order API Standards Documents.
Want more information? You can read API-6D Specification for Pipeline Valves at law.resource.org