Structured Packing RFQ Checklist: What Information Engineers Need Before Quotation
A structured packing inquiry often begins with a simple request:
Please quote structured packing.
However, this information is usually not enough for an accurate engineering quotation.
Structured packing is not a universal product that can be selected only by quantity.
The correct solution depends on:
- tower dimensions
- process conditions
- packing requirements
- installation limitations
- operating objectives
A complete RFQ helps suppliers provide:
- correct packing selection
- accurate pricing
- suitable material recommendation
- realistic delivery planning
The quality of the quotation depends heavily on the quality of the information provided.
Why a complete RFQ matters
Two customers may request the same product:
250Y structured packing
But the correct solution may be different.
Because the tower conditions may differ:
Customer A:
- clean distillation service
- high temperature
- stainless steel requirement
Customer B:
- corrosive scrubber
- lower temperature
- plastic packing requirement
The packing model alone does not define the complete solution.
Basic tower information required
The first section of a structured packing RFQ should include tower data.
Tower diameter
Required because it determines:
- packing volume
- module arrangement
- hydraulic behavior
Packed height
Required because it affects:
- separation capability
- number of packing sections
- installation planning
Available installation opening
Important information:
- manway size
- access limitation
This affects:
- module size
- segmentation
Tower drawings
If available, drawings help confirm:
- internal dimensions
- support arrangement
- distributor position
A simple dimension mistake can create installation problems later.
Process information required
Structured packing performance depends on operating conditions.
Important process data include:
Application
Examples:
- distillation
- absorption
- stripping
- scrubbing
Operating pressure
Pressure affects:
- gas volume
- hydraulic behavior
- packing selection
Temperature
Temperature affects:
- material selection
- fluid properties
Gas and liquid flow rates
Required for:
- capacity evaluation
- pressure-drop estimation
- flooding analysis
Fluid information is critical
The packing contacts process fluids directly.
Provide:
Gas composition
Examples:
- air
- CO₂
- H₂S
- VOC
- solvent vapor
Liquid composition
Examples:
- water
- amine
- caustic solution
- organic solvent
Corrosion information
Important for selecting:
- SS304
- SS316L
- PP
- PVDF
- ceramic
Packing specification information
If the customer already has a requirement:
Provide:
Packing type
Examples:
- 125Y
- 250Y
- 350Y
- 500Y
Material
Examples:
- stainless steel
- plastic
- ceramic
Surface area
Important for:
- efficiency
- pressure drop
Quantity
Usually required as:
- m³
- sections
- layers
Performance requirements
A good RFQ should explain the purpose.
Examples:
New tower
Need:
- complete packing recommendation
Retrofit project
Need:
- replacement evaluation
Capacity increase
Need:
- higher throughput analysis
Efficiency improvement
Need:
- higher separation performance
The supplier needs to understand the goal, not only the product name.
Existing tower problems should be included
For replacement projects, provide:
Current problem
Examples:
- high pressure drop
- low purity
- flooding
- insufficient capacity
Operating history
Useful information:
- previous performance
- maintenance records
- shutdown inspection
Existing packing information
Include:
- manufacturer
- model
- material
- service time
This helps identify whether the issue is:
- packing
- internals
- operation
Drawings and photos improve quotation accuracy
Useful attachments:
- tower drawing
- internal layout
- packing support drawing
- photos
Photos can reveal:
- corrosion
- fouling
- installation limitations
Visual information often prevents misunderstanding.
Packaging and logistics information
For export projects, also consider:
- destination
- delivery term
- required shipping method
Structured packing volume can be large but lightweight.
Transport planning depends on:
- module size
- packaging method
- container utilization
Common RFQ mistakes
Mistake 1:
Only providing packing model.
Problem:
No process basis.
Mistake 2:
Only providing tower diameter.
Problem:
Cannot evaluate performance.
Mistake 3:
Ignoring installation limitations.
Problem:
Packing may not fit through access opening.
Mistake 4:
Comparing quotations without technical details.
Problem:
Different products may appear cheaper but are not equivalent.
Minimum RFQ checklist
Before requesting quotation, prepare:
✅ Application✅ Tower diameter✅ Packed height✅ Gas flow✅ Liquid flow✅ Pressure✅ Temperature✅ Fluid composition✅ Material requirement✅ Packing type requirement✅ Quantity✅ Delivery destination
Better RFQ creates better engineering solutions
Structured packing is a process component, not a simple commodity.
A supplier can provide much better support when the RFQ includes:
- process information
- equipment information
- project objective
The result is:
- more accurate quotation
- fewer technical misunderstandings
- lower project risk
A good RFQ is the first step toward a successful packed column design.