Metal Structured Packing RFQs: What Information Separates a Budget Price from a Fabrication-Ready Offer?
A supplier can provide a budget price for metal structured packing from only:
tower diameter, packing type, material, and total volume.
A fabrication-ready quotation requires much more.
This distinction is important because structured packing is not simply purchased as loose material.
It must be manufactured to fit a specific tower.
Tower Inside Diameter Is Essential
Structured packing elements must fit the vessel.
Therefore, the quotation should eventually be based on the actual tower ID rather than only the nominal vessel size.
For retrofit projects, field-confirmed diameter may be preferable where shell distortion is possible.
Packing Model Must Be Defined
A request such as “250Y” provides useful guidance but may not fully define:
corrugation geometry, sheet thickness, surface treatment, perforation, or supplier-specific design.
The supplier should therefore provide technical data for the offered packing.
Total Bed Height
Total packed height determines:
number of layers and packing volume.
The buyer should identify whether one continuous bed or several beds are required.
If bed heights are different, each bed should be listed separately.
Element Height
Supplier standard element height may be acceptable.
If the project requires a special layer height, that should be defined before final quotation.
Otherwise, the supplier may calculate a different layer count from the purchaser.
Manway Information
This is one of the biggest differences between budgetary and fabrication-ready RFQs.
Without the manway clear opening, the supplier cannot finalize:
segment size, number of sections, and installation arrangement.
For large towers, this information is critical.
Material and Sheet Thickness
The RFQ should state:
alloy and required sheet thickness if already fixed.
If sheet thickness remains supplier-specific, the supplier should declare what is included in the quotation.
Support and Other Internals
The buyer should clarify whether the quotation is for:
structured packing only,
or a package including:
support grid, bed limiter, distributor, collector, or other internals.
“Complete packing system” is too vague unless the included components are listed.
Installation Hardware and Marking
For sectional packing, pricing may also depend on:
edge reinforcement, bands, clips, identification tags, and installation marking.
These should be part of the technical scope.
Documentation
Large EPC projects may require:
GA drawings, fabrication drawings, material certificates, dimensional reports, packing plans, and installation instructions.
These requirements should appear before final commercial negotiation.
Freight Dimensions
Structured packing is bulky and can be vulnerable to deformation.
The supplier should state the expected packaging volume and crate arrangement where freight is part of the commercial evaluation.
Engineering Takeaway
A budgetary structured packing quotation can be generated from limited information.
A fabrication-ready quotation requires tower geometry, bed configuration, access limitations, material construction, segmentation, scope boundaries, and documentation requirements.
Procurement should clearly distinguish between these stages.