How Do Engineers Control Changes After Approving Tower Packing Specifications?
In industrial tower projects, approving technical specifications is not the end of the engineering process.
During manufacturing and project execution, changes may occur due to:
- Customer requirements
- Process modifications
- Material availability
- Installation conditions
- Engineering improvements
Without proper change control, even a small modification may create risks such as:
- Manufacturing errors
- Incorrect shipment
- Installation problems
- Performance deviation
Therefore, engineers use change control procedures to ensure all project information remains consistent.
Why Is Change Control Important for Tower Packing Projects?
Tower packing and tower internals are usually manufactured according to approved documents.
These documents may include:
- Technical specifications
- Drawings
- Datasheets
- Material requirements
- Inspection requirements
Once approved, these documents become the reference for:
- Manufacturing
- Quality inspection
- Customer approval
- Installation
Any uncontrolled change may cause different teams to work with different information.
What Types of Changes Require Engineering Control?
1. Product Specification Changes
Examples:
- Packing type change
- Packing size change
- Material change
- Quantity change
Example:
Original requirement:
PP Pall Ring 50 mm
Change:
PP Pall Ring 38 mm
Engineers should evaluate:
- Performance impact
- Hydraulic impact
- Customer approval
2. Material Changes
Material changes require careful review.
Examples:
- PP → PVDF
- SS304 → SS316L
- Ceramic → Metal
Engineers evaluate:
- Corrosion resistance
- Temperature capability
- Mechanical performance
- Cost impact
3. Dimension Changes
For tower internals, dimensions are critical.
Changes may include:
- Diameter
- Height
- Segment size
- Connection position
These changes may affect:
- Installation
- Fit-up
- Tower performance
4. Drawing Revisions
Engineering drawings may change due to:
- Customer comments
- Site information updates
- Design improvements
Engineers should control:
- Revision number
- Approval status
- Effective date
5. Scope of Supply Changes
Changes may involve:
- Adding components
- Removing components
- Changing responsibility
Examples:
Original scope:
Mist eliminator mesh pad only
Updated scope:
Mesh pad + support frame
The supplier and customer should clearly confirm the change.
How Do Engineers Manage Specification Changes?
Step 1: Identify the Change
Engineers record:
- What changed?
- Why was it changed?
- Who requested the change?
Step 2: Evaluate Technical Impact
Engineers review:
- Performance impact
- Material impact
- Manufacturing impact
- Installation impact
Step 3: Update Documents
Relevant documents should be revised:
- Technical specification
- Drawings
- Datasheets
- Purchase documents
Step 4: Obtain Approval
Depending on the project:
Approval may involve:
- Customer engineer
- EPC contractor
- Supplier engineering team
- Project manager
Step 5: Communicate the Final Revision
All involved teams should use the same approved version.
Including:
- Engineering
- Production
- Quality control
- Logistics
What Documents Should Be Controlled During Changes?
Technical Specification
Controls:
- Product requirements
- Material
- Performance parameters
Drawings
Controls:
- Dimensions
- Assembly details
- Installation information
Purchase Documents
Controls:
- Scope
- Quantity
- Delivery requirements
Inspection Documents
Controls:
- Quality requirements
- Acceptance criteria
What Problems Can Occur Without Change Control?
Manufacturing Based on Old Information
Results:
- Wrong product
- Rework
- Production delay
Customer and Supplier Using Different Versions
Results:
- Approval problems
- Responsibility disputes
Late Changes During Production
Results:
- Additional cost
- Extended delivery time
Unrecorded Verbal Changes
Results:
- Information loss
- Project confusion
How Do Engineers Reduce Change Risks?
1. Use Revision Numbers
Each document should clearly show:
- Revision level
- Date
- Status
2. Confirm Changes Before Production
Manufacturing should start only after:
- Final approval
- Document confirmation
3. Keep Change Records
Records should include:
- Previous version
- New version
- Reason for change
4. Communicate Across Departments
Changes should reach:
- Engineering team
- Production team
- Quality team
- Customer
What Information Helps Effective Change Management?
Customers should provide:
Project Documents
- Approved specifications
- Drawings
- Technical requirements
Change Information
- Reason for change
- Required modification
- Expected timing
Approval Requirements
- Review process
- Responsible persons
How DAIER Supports Engineering Change Management
DAIER supports tower projects through:
- Technical document control
- Drawing revision management
- Specification confirmation
- Engineering communication
Products include:
- Random Packing
- Structured Packing
- Liquid Distributor
- Redistributor
- Packing Support Grid
- Hold-down Grid
- Mist Eliminator
- Customized Tower Internals
For customized projects, DAIER follows engineering-based communication to ensure approved requirements are correctly transferred from design to fabrication and delivery.
Specs and test data available upon request.