How to Prepare Tower Internals RFQ Documents: Technical Checklist for Engineers

How to Prepare Tower Internals RFQ Documents: Technical Checklist for Engineers

Introduction

Preparing complete RFQ (Request for Quotation) documents is an important step when purchasing tower internals.

A detailed RFQ allows suppliers to understand the project requirements, recommend suitable designs and provide accurate quotations.

Incomplete technical information may lead to incorrect proposals, quotation delays or unsuitable equipment selection.

DAIER Separation supports customers with customized tower internals including liquid distributors, packing supports, hold down grids and mist eliminators for industrial separation equipment.

Why Are Complete RFQ Documents Important?

Tower internals are usually customized components.

Unlike standard products, their design depends on:

• Tower dimensions

• Operating conditions

• Installation requirements

• Material specifications

• Performance targets

Providing complete information helps suppliers evaluate:

• Design requirements

• Manufacturing feasibility

• Material selection

• Delivery schedule

• Cost estimation

Basic Equipment Information Required

1. Tower Details

Provide:

• Tower diameter

• Tower height

• Shell inside diameter

• Manway size

• Internal access information

These details determine the available installation space.

2. Process Operating Data

Important parameters include:

Gas Side

• Gas flow rate

• Gas composition

• Operating pressure

• Operating temperature

Liquid Side

• Liquid flow rate

• Liquid composition

• Density

• Viscosity

These factors affect internal design and material selection.

3. Tower Internals Type Required

Clearly identify the required components.

Common tower internals include:

Liquid Distributor

Information required:

• Distributor type

• Liquid flow rate

• Material

• Installation position

Packing Support

Information required:

• Packing type

• Packing weight

• Support structure

• Load requirement

Hold Down Grid

Information required:

• Packing type

• Packing density

• Operating conditions

Mist Eliminator

Information required:

• Gas velocity

• Droplet removal requirement

• Material

• Thickness

• Density

4. Material Requirements

Material selection should consider:

• Corrosion resistance

• Temperature

• Mechanical strength

Common materials:

Stainless Steel

• SS304

• SS316

• SS316L

Suitable for chemical processing and high temperature applications.

Plastic Materials

• PP

• PE

• PVDF

Suitable for corrosive environments.

Special Materials

Used for:

• Strong corrosion conditions

• Special process requirements

5. Installation Requirements

Important information:

• Manway size

• Maximum single-piece dimension

• Segmentation requirement

• Installation direction

• Site assembly requirement

Large tower internals often need segmented manufacturing.

Recommended Tower Internals RFQ Checklist

Before sending an RFQ, prepare:

✅ Equipment drawing
✅ Tower diameter
✅ Internal dimensions
✅ Operating temperature
✅ Operating pressure
✅ Gas flow rate
✅ Liquid flow rate
✅ Process medium
✅ Material requirement
✅ Installation limitation
✅ Quantity requirement

Common RFQ Mistakes

Sending Only Product Names

Example:

“Please quote liquid distributor.”

This is usually insufficient.

Missing Operating Conditions

Without process data, suppliers cannot confirm suitable materials and design.

Ignoring Existing Equipment Conditions

Replacement projects require checking existing dimensions and installation limitations.

Conclusion

A complete tower internals RFQ document helps suppliers provide accurate engineering solutions and quotations.

The more detailed the project information, the easier it is to select suitable internals and avoid problems during installation and operation.

DAIER Separation provides engineering support and customized tower internals solutions for industrial separation projects.

Related Products

• Liquid Distributor

• Packing Support Grid

• Hold Down Grid

• Mist Eliminator

• Tower Packing