In a process pump tender, the mechanical seal is where a lot of bids quietly fail. API 682 governs the seal category, arrangement, and flush plan, and the buyer specifies them to match the fluid, the temperature, and the emissions limits. A seal arrangement or flush plan that does not suit the service, a single seal where the fluid demands a dual pressurized arrangement, the wrong Plan for a flashing or dirty fluid, is a technical deviation the evaluator will mark even when the pump itself is ideal.
How Seal Choice Decides the Bid
API 682 defines seal categories (1, 2, 3) for increasing severity, arrangements (1, 2, 3 for single, dual unpressurized, dual pressurized), and the piping plans that support them (Plan 11, 21, 32, 52, 53A/B/C, 62 and others). The buyer chooses these for a reason: a hazardous or volatile fluid demands a dual arrangement and a barrier-fluid plan; a hot fluid needs flush and quench; a dirty fluid needs flushing or an external source. Offer the wrong category or plan and you have offered a seal the service will not tolerate, which the evaluator scores as non-compliant.
Why Seal Requirements Get Missed
The pump datasheet draws the eye to the hydraulics, while the seal category, arrangement, and plan sit in the seal datasheet and the API 682 references, sometimes with a piping plan schematic in an annex. A bidder focused on flow and head can carry over a default seal configuration without matching it to the fluid properties and emissions limits the tender specifies. The mismatch is invisible on the hydraulic side and fatal on the seal side.
How an AI Bid Response Agent Checks the Seal Plan
An AI bid response agent reads the pump and seal datasheets together with the fluid properties and emissions limits, and confirms the specified API 682 category, arrangement, and flush plan against the seal you intend to offer. It flags a mismatch, a single seal against a fluid that demands a dual pressurized arrangement, a Plan that will not handle the service, before you submit. You offer the seal the fluid actually requires, not the default that fails the evaluation.
You can see the full workflow running, the requirements check, the Go or No-Go read, the draft assembled from past winning bids, and the red-team score, in our AI bid response agent demo for oil and gas equipment tenders. The same AI bid response agent runs for any oil and gas equipment supplier, against any tender they are eligible to pursue.