Send the current compressed air equipment specification, equipment schedules, relevant drawings, and every issued addendum that could affect the equipment or quoted scope. Include referenced requirements for air treatment, receivers, piping connections, electrical service, controls, testing, and startup—not just the page naming the compressor.
A useful compressed air bid invitation specifications package also identifies the document revisions and pricing deadline. If you’re sending selected sections instead of the full project manual, include the table of contents and addendum index so we can help identify missing references. At Process & Power, we need enough context to distinguish what the equipment package must include from what another contractor will furnish or install.
Start With the Equipment Section, Then Follow Its References
Compressed air requirements don’t always appear under the same specification number. Depending on the project, they may be organized with plumbing, mechanical, or process systems. Search the project manual by system name, equipment tag, and section title rather than assuming one section contains the complete scope.
Send these sections when they apply:
Compressed air equipment or packaged air compressor systems: Include the complete section, especially approved manufacturers, performance requirements, package accessories, submittals, and execution requirements.
Dryers, filtration, and condensate management: These may be separate sections or referenced within the compressor specification. They establish whether air treatment and condensate equipment belong in the package.
Air receivers and accessories: Include requirements for storage, instrumentation, drains, and associated package components.
Compressed air piping and specialties: Send requirements affecting equipment connections, connection materials, isolation valves, and the boundary between packaged and field-installed piping.
Controls and instrumentation: Include sequencing, monitoring, alarms, communications, and interfaces with plant or building systems.
Send whole applicable sections, not isolated paragraphs. A product description may identify the equipment, while the execution portion assigns startup, testing, training, or documentation responsibilities that affect pricing.
Include the Supporting Sections That Change the Quote
The compressor section may reference requirements elsewhere in the project manual. Those references can change both the proposed equipment and the work included.
General requirements and procurement instructions
Include applicable Division 01 requirements and bidding instructions covering substitutions, submittals, closeout documents, warranties, delivery restrictions, and supplier qualification. The equipment specification might permit an alternate, while the procurement instructions require a substitution request before the bid deadline.
A supplier’s proposed alternate is not an engineer-approved substitution. Send the required submission procedure, deadline, and any issued acceptance documentation. Acceptance remains subject to the engineer of record and the project approval process.
Electrical, controls, and installation requirements
Send the electrical requirements and drawings identifying the available service and equipment connection scope. Include applicable controls requirements if the package must communicate with another system or participate in coordinated compressor sequencing.
Also include installation requirements affecting supports, access, ventilation, cooling connections, or equipment placement. We can discuss equipment and piping installation needs, but an equipment quotation shouldn’t be read as including installation, electrical work, controls integration, testing, or startup unless those responsibilities are expressly identified.
For startup, clarify whether the request covers equipment startup support, participation in system testing, owner training, or several separate activities. Those aren’t interchangeable scopes.
Send Drawings and Schedules Alongside the Specifications
Specifications describe requirements; drawings show how those requirements fit the project. Include the current equipment schedule, compressed air schematic or piping diagram, equipment-room plan, relevant details, and applicable electrical and controls sheets.
The documents should establish, or flag as unresolved:
Required operating flow and pressure, including where pressure must be maintained.
Air quality, drying, and filtration requirements.
Duty and standby requirements, storage, and package configuration.
Ambient conditions, ventilation or cooling provisions, and service access.
Utility connections and interfaces with existing equipment.
A compressor’s rated discharge pressure alone doesn’t establish pressure available at the point of use. Treatment equipment and distribution losses matter. If drawings and schedules express different requirements, identify the discrepancy for clarification rather than asking suppliers to choose an interpretation silently.
Which Addenda Should Be Included?
Provide the issued addendum register and all addenda affecting the requested scope, including their attachments, replacement sheets, and revised specification pages. If applicability is uncertain, send the complete addendum rather than only the paragraph that mentions compressed air.
An addendum can affect pricing without changing the compressor section. It may revise electrical service, move the equipment room, change owner-furnished equipment, alter delivery requirements, or reassign installation work.
Keep the original documents and issued changes clearly distinguishable. Identify superseded sheets and sections; don’t mix old and new pages in an unlabeled folder. Include formally issued clarifications affecting the quote, with their status identified.
When another addendum arrives after the invitation, forward it promptly and ask whether it changes price, scope, or the ability to meet the quote deadline. Request that the proposal identify its drawing revisions, specification basis, and acknowledged addenda. That creates a usable record for bid comparison.
A Hypothetical Tennessee Bid Comparison
Consider a hypothetical facility expansion in Memphis. An estimator sends the compressor schedule to two suppliers, but a later addendum revises the air-treatment scope and assigns a separate receiver to the equipment supplier.
One supplier receives the addendum through the project portal; the other prices the original schedule. The proposals now cover different equipment, even if both are labeled “compressed air package.”
The next step is to reconcile the document basis—not simply compare totals. Send the same current package to both suppliers and request revised inclusions, exclusions, and addendum acknowledgments.
A Reusable Bid Invitation Cover Note
Use this checklist to make the document package easier to review:
Project: Name, Tennessee project location, and equipment tags being priced.
Pricing request: Preliminary budget or firm equipment proposal; quote deadline and required-on-site date.
Specifications: Applicable section titles, numbers, revision dates, and referenced supporting sections.
Drawings: Sheet index, schedules, plans, schematics, details, and revision dates.
Addenda: Register, applicable complete addenda, attachments, and issued clarifications.
Scope boundaries: Equipment supply, freight, unloading, installation, electrical connections, controls integration, testing, and startup assignments.
Approval requirements: Approved manufacturers, substitution procedure, deadlines, and required quotation documents.
Open items: Missing information, unresolved conflicts, and the estimator or project manager contact for questions.
If documents are incomplete, request budget pricing with stated assumptions. A firm proposal needs a defined document basis and explicit qualifications for unresolved items; a firm deadline doesn’t make incomplete requirements final.
Send a Current Package for Equipment Pricing
Preparing a compressed air bid invitation? Send your project scope, specifications, current drawings and addenda, bid deadline, location, and estimator or project manager contact through our Contractor Bids page. We can discuss the pricing requirements and how to include us in relevant future equipment invitations.
Process & Power, Inc.
901-362-5500
1721 Corporate Avenue, Memphis, TN 38132
