Plug Valve Bid Review: Service, Operator and Pressure Boundaries

Review a plug-valve bid in a fixed sequence

A plug-valve offer can look complete while several answers describe different assemblies. One sheet names the body, another illustrates an actuator, and a third mentions sour service without identifying the seals. A useful purchasing review follows one configuration through those documents. It does not calculate a well's safe operating conditions or replace the manufacturer's operating instructions.

Begin with the intended task. Is the request for a complete isolation valve, an actuator change, or internals for an existing serial-numbered assembly? Assign each task its own line. Combining them into one price encourages the reviewer to mistake a replacement kit for a complete alternative, or to assume retained equipment has already been checked.

Establish a single configuration record

The TechnipFMC Flowline catalogue, printed page 8 provides a useful contrast. Weco ULT 150 P537789 is listed as nominal 2-inch standard service, with 1502 ends, 15,000 psi CWP and 84 lb weight. Weco ULT 100 P501010 is a nominal 3-inch manual sour-service row, with 1502 ends, 10,000 psi CWP and 231 lb weight. The common end figure has not made the complete assemblies equivalent.

Use those rows to establish how an offer should be identified, not as a prescribed choice for the buyer's duty. Do not infer a low-temperature option when the selected row has no LT number. Do not decode a working pressure from a model suffix when the catalogue provides the explicit rating column.

Close independent review lines

Give each unresolved line an owner and an expected document. A global statement of compliance should not overwrite a specific missing answer. Commercial comparison can continue, but technical approval should remain tied to the unresolved items.

Diagnose an inconsistent quotation without repairing it yourself

Consider a fictional bid naming a manual sour-service valve while its attached drawing shows a standard-service hydraulic assembly. Ask the bidder to identify which document governs and return one coordinated revision. Do not keep the preferred material from one page and the preferred operator from another; that would create a combination that neither document actually offers.

Next inspect the pressure vocabulary. CWP in the reference table is cold working pressure. If a bidder supplies a higher test number, request its purpose, medium, procedure and record independently. The catalogue examples do not provide a complete pressure-temperature curve or authorize the buyer to calculate an elevated-temperature rating.

For spares, trace the installed assembly before comparing kit prices. Request its maker, assembly number, serial marking and current parts-list reference. Ask which retained components remain in service and which will be replaced. An apparently matching plug or segment should not be treated as interchangeable solely because it comes from a similarly named valve family.

Keep desk review separate from field work

TechnipFMC's catalogue warnings, printed page 88, prohibit work on pressurized connections, substituting other manufacturers' components into its products, and exposing standard-service products to sour fluids. These restrictions are not a field maintenance procedure. Route installation, isolation, depressurization and repair questions to qualified personnel following the applicable maker's instructions and site controls.

Record the final evidence list beside the selected configuration: issued drawing, service and seal basis, operator schedule, inspection requirements and agreed test documentation. A document title alone does not prove a completed test or current certification.

Use the high-pressure plug-valve product reference for the retained catalogue rows. Submit the completed review sheet and unresolved questions through the RFQ Builder, making clear whether substitution is permitted. The category illustration is not evidence of the selected model or its internal mechanism.