About Trenchless Technology
Trenchless pipe replacement is a method of replacing old pipe with new, with
the same, or larger inner diameter. This is accomplished by pulling a hardened steel
splitting head through the old pipe. The new pipe is attached to the back of the splitting
head and is pulled in as the old pipe is split and expanded. The new pipe
follows the path of the old one and lies in its rubble. The method of pipe
replacement is NOT "slip lining".
Here is how it works....
| Access holes are dug at each end
of the pipe to be replaced. |
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The location of these access
holes are chosen for the minimal impact. |
| The replacement Polyethylene
(PE) pipe is attached to the splitting head. |
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At the other end the splitting
head and replacement pipe are pulled through the existing pipe. |
| The existing pipe, whether steel, cast iron, or porous
material is broken to form a bed for the replacement pipe. |
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Advantages
- Lower cost for pipe replacement than existing open trench methods
- No interruption of existing landscape, roadway, or
structure
- Replacement, not just pipe liner
High-density
polyethylene pipe is used worldwide for pressure water and natural gas
utilities. PE
pipe is not new in its various applications. It has a wide range of
uses in pipe bursting, boring, directional drilling, slip lining,
direct burial and trenchless replacement. In fact, PE pipe has
been used successfully for over 35 years.
PE pipe is
joined by heat fusion. The ends of the pipe are melted while being held together and allowed to cool. The result is a
seamless connection that provides the same strength as any other part
of the pipe. Normal
pipe couplings can be used for attachment to existing plumbing.
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