AM-LINERII

1
AM-LINERII
INSTALLATION PROCEDURE

• Charles A. Munson

2
Introduction

• This presentation is intended to give an
  overview of the procedures and techniques used to
  install the AM-LINERII PVC pipeline
  rehabilitation system.

3
SEQUENCE OF EVENTS

• Pre-Installation closed circuit television
  inspection
• Pre-installation pipeline preparation
• Installation technique
• Post-installation closed circuit television
  inspection
• Reinstatement of service connections

4
PRE-INSTALLATION CLOSED CIRCUIT TELEVISION
INSPECTION

• Identify any conditions in the pipeline that
  could impede or prevent the proper installation
  of the liner
• Provide a record of the pre-lined condition of
  the pipe
• Accurately record the position of all service
  connections

5
PRE-INSTALLATION CLOSED CIRCUIT TELEVISION
INSPECTION

• A highly trained operator uses a remotely
  controlled CCTV camera to assess the condition of
  the pipeline.
• As the camera passes through the pipeline, images
  from the camera are monitored by the operator and
  recorded either in DVD or VHS format.
• The operator makes a record of the position of
  all service connections and defects in the
  pipeline.

6
PIPELINE PREPARATION

• Typical pipeline conditions that must be
  remediated prior to lining
• Roots
• Large quantities of groundwater infiltration
• Collapsed pipe
• Dropped Joints or offsets of more than 12.5 of
  the inside pipe diameter
• Protruding taps

7
PIPELINE PREPARATION
ROOTS

• Roots must be removed from the pipeline prior
  to installing the liner. Roots may be removed by
  using a chemical root treatment or by mechanical
  means such as chain flails.

8
PIPELINE PREPARATION
INFILTRATION

• Large quantities of cold ground water
  flowing into the pipeline, can act as a heat sink
  and prevent the PVC liner material from reaching
  the temperature needed to form properly.
• Infiltration may be eliminated either by
  chemical grouting or installing a patch prior to
  lining.

9
PIPELINE PREPARATION

• Collapsed pipe, dropped or offset joints that
  reduce the inside circumference of the pipeline
  to less than the outside circumference of the
  pipe liner will not allow the liner to form
  properly. This condition is usually presented as
  a longitudinal rib after the liner is installed.
• To avoid ribs in the liner, sections of
  pipeline containing collapsed pipe, dropped or
  offset joints should be point repaired prior to
  lining.

COLLAPSED PIPE
10
PIPELINE PREPARATION
PROTRUDING TAPS

• Service taps that protrude into the pipeline
  more than 12.5 or 1-inch should be cut off using
  a chain flail or remotely controlled grinder.

11
PIPELINE PREPARATION
CLEANING

• Prior to insertion of the liner, the pipeline
  is cleaned using a high pressure water jet to
  remove any debris in the pipeline.

12
LINER INSTALLATION

• Heating the coil of liner
• Attaching the liner to the pulling cable
• Insertion of the liner into the host pipe
• Stress Relief
• Processing the liner

13
LINER INSTALLATION
The coil of AM-LINERII is brought to the jobsite
and loaded into an enclosed trailer to be heated.
14
LINER INSTALLATION
Preparing Pulling Nose
The pulling nose is made by folding the flat
liner in half longitudinally, drilling holes
perpendicularly through the folded liner, then
weaving a cable or chain through the holes. The
entire section is then wrapped with duct tape.
The end of the liner is heated to make it pliable.
15
LINER INSTALLATION

• The coil of liner is heated by steam in the
  trailer.
• The liner is heated until it is as pliable as wet
  leather.
• Heating time will vary depending on ambient
  temperature, altitude and steam quality.

16
LINER INSTALLATION
A cable that has been strung from a winch at the
downstream manhole, through the pipeline to the
upstream manhole is attached to the pulling nose.
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LINER INSTALLATION
The liner is pulled into the host pipe either
directly as shown in the picture on the left or
through the patented shaping device shown on the
right.
18
LINER INSTALLATION
The speed at which the liner is inserted into the
pipeline is coordinated using two way radio.
19
LINER INSTALLATION

• The liner is pulled to above ground level at the
  downstream manhole.
• When the liner reaches the maximum above ground
  length allowed by the pulley system the winch is
  locked in that position.

20
LINER INSTALLATION
STRESS RELIEF

• The liner is cut off above ground level at the
  upstream manhole.
• A flow through plug with the steam hose attached
  is inserted into the end of the liner.
• Steam under low pressure is forced into the
  liner.
• As the liner material heats induced stress is
  relieved, this is indicated by movement of the
  liner.
• This process continues until no movement of the
  liner is observed.

21
LINER INSTALLATION
STRESS RELIEF

• After all movement has ceased at the upstream
  end, the excess liner is trimmed and the process
  plug installed.
• The brake on the winch at the downstream manhole
  is released.
• Steam is applied to the liner through the plug at
  the upstream manhole.
• The stress relief process is repeated for the
  downstream end of the liner until all movement
  has stopped.

Upstream manhole
Downstream manhole
22
LINER INSTALLATION
Processing

• After the stress relief process is complete, the
  excess liner material is cut away and a
  flow-through plug installed.
• The hose from the plug is connected to the
  downstream exhaust manifold.
• The steam temperature and pressure is monitored
  and controlled at this process station.

23
LINER INSTALLATION
Processing

• The liner is heated using low pressure steam
  supplied by a boiler at the upstream end.
• Heating time is determined by the length, and SDR
  of the liner.
• Additional heating time may be added by the
  installer if warranted by conditions within the
  host pipe.

24
LINER INSTALLATION
Forming and Cooling

• At the end of the heating time the process is
  switched from steam to compressed air.
• The operator at the downstream manifold quickly
  increases the internal pressure of the liner
  causing it to expand and conform tightly to the
  interior of the host pipe.
• Internal pressure is maintained until the exhaust
  air temperature has reached a predetermined
  temperature.
• Water may be induced into the compressed air
  during the cooling process to reduce the cooling
  time.

25
POST INSTALLATION CCTV INSPECTION

• After the liner has been cooled, the flow through
  plugs are removed and the liner is inspected
  using CCTV.
• The operator inspects the liner to make sure that
  the it has formed properly and that there are no
  defects in the liner.

26
REINSTATEMENT OF SERVICE CONNECTIONS
Services are reconnected using a remotely
controlled robotic cutter
27
REINSTATEMENT OF SERVICE CONNECTIONS
CCTV Camera
Robotic Cutter
Cutter Operator
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REINSTATEMENT OF SERVICE CONNECTIONS

• In most cases the service connection is located
  by means of a pronounced dimple in the liner.
• When the dimple is not clearly visible, the
  cutter operator refers to the pre-installation
  inspection tape and the previously recorded
  position of all the service connections.

29
REINSTATEMENT OF SERVICE CONNECTIONS

• Service connections are reinstated using a
  remotely controlled cutting device.
• When reinstated the hole for the connection must
  be smooth and conform to the inside shape of the
  old opening.
• The hole must be a maximum of 105 and a minimum
  of 90 of the service pipe diameter.

30
FINISHING TOUCHES
The ends of the liner are neatly trimmed leaving
one to one and one half inches of liner extending
into the manhole.
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AM-LINERII
Installation advantages

• No refrigeration required for storage and
  transportation
• No hazardous chemicals to mix
• No noxious odors
• The liner is manufactured in a controlled
  environment not in the ground under unstable
  conditions
• The installation process does not change the
  physical properties of the liner material
• Simple installation procedure