How to compare two steel pipe mill offers

Two quotations can describe the same diameter and grade yet cover very different purchases. One may include coating, inspection and export preparation; the other may price only bare pipe at the factory. Comparing their headline price per tonne can conceal both cost and technical gaps.

A useful comparison starts with a common purchase specification, a named manufacturing works and an agreed delivery scope. The aim is to establish what each supplier will deliver, what remains for the buyer to arrange and which conditions must be resolved before an order can be placed.

This guide applies to project enquiries for large-diameter welded steel pipe, including HSAW / SSAW and LSAW. The required standard, design basis and project specification determine which manufacturing routes are acceptable.

1. Give both suppliers the same enquiry

Issue one controlled revision of the pipe schedule, specifications, drawings and delivery requirements. Ask each bidder to identify compliance and list deviations explicitly. A blank field is an unanswered question, not confirmation of compliance.

The starting package should identify:

• Product standard and edition, steel grade and required delivery condition.
• Outside diameter, wall thickness, quantity, lengths and dimensional tolerances.
• Service conditions and any project restrictions on manufacturing route.
• Pipe ends, joints, fittings and fabricated accessories.
• Internal lining, external coating, cutbacks and field-restoration materials.
• Inspection, testing, traceability and certificate requirements.
• Destination, delivery sequence, required dates and quotation basis.

Use the large-diameter pipe RFQ checklist to assemble the enquiry before approaching mills.

2. Compare the named manufacturing line

Ask where the pipe will be formed, welded, tested and coated. Confirm the proposed works and line can meet the actual combination of diameter, wall, grade, length and testing. A broad catalogue range does not establish capability for a particular order.

An HSAW offer and an LSAW offer may both merit consideration when the purchase specification permits both. They are not automatically interchangeable. Record route acceptance before using price to rank the offers. See HSAW vs LSAW: how to choose the manufacturing route.

Distinguish the contracting supplier from the manufacturer. A project supplier can coordinate several parts of the package, but the quotation should still identify the proposed manufacturing source and the responsibilities of each party.

3. Use a line-by-line comparison table

Copy the table below into the bid evaluation. Replace each dash with a quotation reference, written clarification or explicit exclusion. Keep the buyer's required basis in the same document.

Technical non-compliance should remain a qualification issue. Do not turn an unacceptable deviation into an invented price adjustment to make an offer appear comparable.

4. Reconcile testing and documents before comparing price

Confirm the specified tests, acceptance criteria, sampling or test units, reporting and inspection participation. The applicable requirements depend on the product standard and project specification; do not assume one universal test package applies to every pipe order.

A statement such as “standard inspection included” needs clarification. Ask which activities are included, who performs them, whether purchaser or third-party attendance is allowed and how inspection notice will be managed.

Treat certificates and third-party inspection as separate lines in the evaluation. See the MTC 3.1 / 3.2 guide when writing the document requirement. Request a document index and confirm how heat and item identity will be retained through cutting, coating and packing.

5. Compare readiness dates and arrival dates separately

“Delivery in eight weeks” is incomplete unless the starting event and finishing milestone are defined. Does the period start at the purchase order, deposit, drawing approval or availability of steel? Does it end at completion of pipe manufacture, coating, final release or arrival at destination?

Request a schedule covering material procurement, forming and welding, tests, coating or lining, inspection release, document approval, packing, inland transport and shipment. Identify which dates are committed and which depend on a vessel booking or unresolved approvals.

For phased projects, compare the delivery sequence as well as the total completion date. A complete final shipment does not compensate for missing the first installation batch.

6. Bring both offers to the same delivery and cost basis

Record the full Incoterms expression, including the version and precise named port or place. A quotation for FOB at origin and a quotation for delivery to a destination cannot be compared by subtracting an assumed freight amount.

For some Incoterms rules, the destination to which carriage is paid differs from the point where risk transfers. Confirm both responsibilities rather than treating payment for transport as equivalent to risk remaining with the seller. The ICC guidance on incorporating Incoterms rules explains why the named place and version matter.

Build a cost bridge from each quoted price to one defined comparison point:

Quoted scope + required excluded items + buyer-arranged transport and handling + applicable import costs = comparable acquisition cost at the agreed point.

Use documented estimates, consistent currency assumptions and the same quantity basis. Mark unquoted items as unresolved instead of assigning zero. Avoid double-counting freight or handling already included in the offer. List recoverable taxes separately where relevant and confirm the treatment with the buyer's import and finance advisers.

For large-diameter or long pipe, obtain handling and transport confirmation for the actual dimensions and shipment plan. Port access, storage, lifting and final-road constraints can affect execution even when ocean freight is available.

7. Close the comparison with a short clarification register

Before selection, list each open issue, responsible party, required answer and deadline. Obtain revised quotations or written clarifications linked to the enquiry revision. Retain a clear record of accepted deviations and included scope.

The preferred offer should meet the technical requirement, provide an executable schedule and make the complete commercial scope understandable. A lower price is meaningful only after those conditions are aligned.

Send two offers for a structured review

Share your pipe schedule, governing specifications, destination, required dates and both quotations. Twelve Mill can help structure the questions needed to compare proposed manufacturing routes, inspection scope and delivery responsibilities.

Send your steel pipe RFQ and supporting documents.