Shell-and-tube heat exchangers are opened during petrochemical maintenance so tube bundles can be cleaned, inspected, repaired or replaced. Bundle extraction is the controlled handling stage that connects exchanger preparation with the downstream maintenance work.
This page focuses on extraction equipment and work planning. Qingwei supplies tube bundle extractors; it does not position this page as a general petrochemical maintenance-service offer.
The Role of Bundle Extraction in Heat Exchanger Maintenance
The exchanger must be isolated, opened and prepared before the bundle is moved. The extractor is then aligned with the exchanger centreline and used to apply controlled axial force. As the bundle travels, support and alignment are maintained so the assembly can be transferred to cleaning or inspection.
Coordinate the Turnaround Sequence
- Confirm exchanger isolation, opening and site handover requirements.
- Remove the channel or cover according to the approved lifting plan.
- Position and align the tube bundle extractor.
- Complete the initial pull and monitor breakaway resistance.
- Support the exposed bundle throughout extraction.
- Transfer the bundle for cleaning, inspection or repair.
- Prepare alignment and support for controlled reinsertion.
Data Required Before Equipment Selection
- Bundle weight, length and diameter.
- Exchanger drawing and centreline height.
- Previous extraction history, fouling and corrosion condition.
- Available extraction clearance and pulling direction.
- Ground or platform support condition.
- Lifting arrangement and post-extraction laydown area.
- Diesel or electric power preference.
Prepare for Cleaning and Inspection
The extraction plan should identify where the bundle will be placed and how it will be supported after removal. Cleaning equipment, inspection teams, cranes and transport routes may compete for the same shutdown area, so bundle travel and laydown space should be coordinated before mobilization.
Restricted Space and Elevated Exchangers
Pipe racks, platforms and neighbouring equipment can limit access. Measure the real working envelope and provide current site photos. For elevated work, the extractor may be lifted by crane to the exchanger and aligned at height; this should not be described as a truck-mounted system unless that exact structure is supplied.
Select the Extraction Equipment
Capacity is selected from expected pulling resistance rather than bundle weight alone. Working length, diameter compatibility, centreline height, support, controls, power and transport all affect the configuration. Compare the Diesel range, electric range and Selection Guide.
Request a Project Review
Send the exchanger drawing, bundle data and site photos for preliminary technical selection. Project results, customer names and performance claims are published only when supporting evidence is available.