I. Valve Design: Valve Bonnet Requirements
What type of bonnet is specified for steel Gate, Globe & Check valves in Hydrocarbon and utility service up to 600# rating and 2″ and larger size?
Explanation: Up to 600# rating, 2″ and larger size steel Gate, Globe & Check valves in Hydrocarbon and utility service shall have bolted bonnets.
II. Flange Requirement for Flanged End Valves in Valve Design
What is the requirement for flanges on flanged end valves?
Explanation: Flanged end valves shall have flanges cast/forged integral with the body. Welded on flanges are not permitted.
III. End Requirements for Socket Weld Valves in Valve Design
What standard is referenced for the ends of socket weld valves?
Explanation: The ends of socket weld valves shall be in accordance with ASME B16.11.
IV. Valve Port Design
What design is specified for all valves?
Explanation: All valves shall be of Full port design.
V. Locking Arrangement in Valve Design
What provision must be supplied with all valves, and what is the locking pad requirement based on?
Explanation: All valves shall be supplied with the provision of Locking arrangement, and the Locking pad requirement will be as per the Latest P & I drawings.
VI. Valve Stem Material while Valve Design
What materials are specified for valve stems?
Explanation: Valve stems shall be one-piece design and made from Forged or Bar material.
VII. Handwheel Selection in Valve Design
How are handwheels selected, and what are the specified limits for operating forces?
Explanation: Handwheels shall be selected to limit the normal operating forces to less than 80 pounds and the seating/unseating forces to less than 120 pounds at the rim of the handwheel. Handwheels shall not exceed 24 inches outside diameter.
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