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State the governing standard and edition, material grade, permitted manufacturing route, outside diameter, nominal wall thickness, quantity, individual piece lengths and dimensional tolerances. If HSAW, SSAW or LSAW is mandatory or prohibited, say so and identify the controlling project clause.
Describe the service conditions
Give the application, design and operating pressure, temperature range, conveyed medium or structural duty, corrosion allowance and design-life assumptions. Add fatigue, sour-service, low-temperature, potable-water or other special requirements where applicable.
Separate base pipe from the complete project package
List end preparation, joint design, bends, tees, reducers, flanges, pile accessories and other fabricated items. Define internal lining, external coating, cutbacks, field-joint materials and repair systems as individual deliverables rather than hiding them inside a general note.
Write the inspection route into the enquiry
Identify mandatory NDT, hydrostatic testing, dimensional inspection, supplementary mechanical or corrosion tests, third-party involvement, hold and witness points, and the required EN 10204 certificate type. Ask each bidder to identify the proposed mill and any subcontracted coating or lining facility.
Make logistics comparable
State the destination, preferred Incoterm when known, required delivery date, permissible split shipments, maximum transport length and any port or site restrictions. Require the offer to identify packing, end protection, inland transport, port handling and ocean-freight inclusions or exclusions.
Use one comparison table for every bidder
Compare the named manufacturing works, manufacturing route, qualified size and grade, raw-material source, testing plan, coating or lining location, certificate route, production schedule, deviations, exclusions and delivered basis. A market-wide catalogue range or a price per tonne is not a technically complete offer.
Copy this minimum RFQ data set
Standard and edition; grade; HSAW, SSAW or LSAW route; OD; wall; lengths; quantity; service; pressure and temperature; ends and joints; fittings; lining; coating; inspection and tests; EN 10204 certificate; documentation language and format; destination; Incoterm; delivery sequence; required date; approved-vendor restrictions.
Send the package for mill mapping
Attach the MTO or pipe schedule, governing specifications, drawings and inspection requirements. Twelve Mill can convert them into a controlled comparison of qualified manufacturing routes. Send the RFQ package, review large-diameter welded pipe supply, or compare HSAW / SSAW with LSAW pipe.
This article is general guidance. The project specification, current standard edition and qualified engineering review remain controlling.