Pipe In-situ Replacement System—Expansion Method
I. Overview
The expansion method for in-place replacement utilizes specialized
expander to generate controlled radial expansion forces within
existing pipes. This uniformly enlarges or splits the old pipe
diameter while simultaneously pulling new pipe into the expanded
cavity. This single-pass process completes pipe rehabilitation by
“expanding and replacing” without excavation or additional working
pits.
II. Technical Advantages (Compared to Pipe Bursting)
Gentle Force Application: Utilizes radial expansion force rather
than axial tension, subjecting manhole walls to minimal reaction
forces and causing zero structural damage to chambers.
No Pipe Accumulation: Completely eliminates “pile-up” phenomena,
ensuring smooth construction without pipe jamming risks.
Flexible Replacement: Supports both same-diameter replacement and
one-size-up pipe diameter expansion (Up-size) to enhance flow
capacity.
III. Equipment Features
Main System
- Automatic threaded tie rod traction enables one-button push/pull
operation, reducing labor intensity by 70%.
- Lightweight quick-install locking kit at the manhole end allows
single-person installation in 1 minute without heavy lifting.
Hydraulic Power Unit
Features automatic directional switching and pressure self-locking
with dual overload and leakage protection.
Equipped with manual/automatic integrated solenoid valves and
standard wireless remote control, enabling operators to work safely
and efficiently away from the shaft opening.
Lightweight Quick-Install Locking Kit at Shaft Entry End
Frequently Asked Questions
What is your delivery time?
Our standard production time is approximately 20 days. For items in
stock, we can ship within 3 business days.
How do you ensure product quality?
We conduct rigorous quality inspections and performance tests on
every drill rod prior to shipment to guarantee reliability and
durability.
Do you accept sample orders?
Yes, we welcome sample orders as an opportunity for you to evaluate
our product quality before committing to larger quantities.
Are your drill pipes heat-treated?
Yes, all our drill pipes and casings undergo professional heat
treatment to enhance their structural strength and operational
performance.
Do your drill pipes have anti-rust protection?
Yes, each drill pipe and casing receives anti-rust paint or
anti-corrosion oil coating before shipping. Galvanized options are
available upon request.
Contact:Mrs. Tina Zhao
Whatsapp/Wechat:+86 13507065529
