Steel Pipe Instal Transportation, Handling & Storage

Steel Pipe Installation

1. Transportation, Handling &
Storage
20 November 2001

2. Packaging for Transportation
•Bolsters are to be padded using rubber, carpet or felt
padding
•Bolsters for large diamater pipes are to be scalloped
or wedged to suit the pipe OD to prevent chaffing of
coatings in transit
•Bolsters should be at least 150mm wide, with a
minimum of two bolsters per layer
•When securing loads you must comply with all local
Transport Authority regulations
•Webbing straps should be used not chains

3. Pipe being sea freighted to Dunedin City Council via Pacifica. Note
the strapping and dunnage used with the flat rack configuration.

4. Packing for road transport of Wellington Regional Council
Orongorongo pipes. Pipe packaged into fours for heli-lift on site.

5. Recommended Handling Practices
•When using a fork hoist, ensure forks are padded
to protect the pipe coatings
•If using a crane, use web slings at least 150mm
wide with no chains or hooks
•If using a crane to handle pipes, guide ropes
should be used to control the pipe during the lift
•Lifting pipes on site requires either twin slings
(spreader bar optional) or a single choked sling if
pipe steel gauge permits

6. Pipe being offloaded a flat rack at storage site. Entire pack is strong
enough to conduct a single lift with appropriate lifting equipment.

7. Storage Guidelines
•Pipes should be stored on site on sand bags or on
padded dunnage
•All dunnage should keep the pipe at least 50mm
clear of the ground
•Dunnage must be a minimum 150mm wide
•If stored for long periods of time, pipe must be
covered to protect coating from UV damage

8. Concrete Lined Steel Pipe
Installation Presentation
20 November 2001

9. Introduction
•Joint Types
•Trench Excavation
•Bedding
•Installation of HSJ Pipe
•Installation of RRJ Pipe
•Backfilling

10. Joint Types
•Hemispherical Slip In Joint (HSJ)
•Welding Band Joints
•Butt Welded Joints
•Flanged Joints
•Rubber Ring Joints (RRJ)
•Gibault Joints

11. Trench Excavation
•All trenches should be excavated to the minimum dimensions
specified within the contract
•Each joint requires a bell hole (jointing pit) with at least
300mm clearance around the pipe for welding and repairing
•Trench depth and dimensions dependent on Transit NZ or
Local Body regulations
•Shoring (reinforcement) of trenches may be required
depending of the trench depth, soil strength, vibration,
placement of spoil adjacent to trench or water inflows - OSH
requirements must be adhered to during trenching

12. Example of trench excavation with
bell holes shown in foreground on a
recent Dunedin City Council
contract where 345mm Ø pipe is
being laid.
The depth and direction of the
trench is controlled through laser
and yardstick measurements.

13. Bedding Guidelines
•Bedding materials used must give continuous
bearing and prevent uneven settlement
•Check bottom of trench for line and level
•Under carriageways, approximately 50mm of
consolidated depth of locally approved materials
shall be used as a bedding
•Cross country, bedding is generally not used
•Bedding material shall not exceed PAP 7 and be
granulised eg. sand

14. Installing HSJ Pipe
•Conduct a test fit to measure entry and maximum
possible deflection
•Check pipe for coating damage and repair
•Check pipe ends for cleaniness and damage
•Mark entry point on socket end and feather in the
internal epoxy mortar repair

15. The epoxy mortar is feathered away from internal lining and slightly
over the entry mark.

16. Installing HSJ Pipe
•Conduct a test fit to measure entry and maximum
possible deflection
•Check pipe for coating damage and repair
•Check pipe ends for cleaniness and damage
•Mark entry point on socket end and feather in the
internal epoxy mortar repair
•Enter spigot of new pipe into socket of laid pipe
and push home with digger and wooden prop

17. This photo shows the new pipe being pushed into the laid pipe using
the digger on the end of the pipe using a wooden prop as protection.

18. Installing HSJ Pipe (cont’)
•Check entry against mark (remember test hole)
•Ensure even entry for joint and complete weld
•Ensure welder has appropriate welder qualifications
•If pipe > 600ø, internal weld optional…test hole
•Complete external repair using approved primer
and wrapping system that is compatible with
Polyken products

19. The above HSJ pipe joint has been pushed together with a deflection of
3° prior to welding.

20. Example of our Hemispherical Slip in Joint. The joint has been welded
but the coating has not yet been reinstated.

21. Example of a welded joint
preceding a fabricated special using
a welding band. The joint has also
been welded but the coating has not
yet been reinstated.
Notice the test points where the
weld can be nitrogen tested after an
internal weld has been completed.

22. Pipe joint has been welded and allowed to cool. The external joint
repair is complete with primer and hi-tack single wrap tape.

23. Installing RRJ Pipe
•Conduct a test fit to measure entry and maximum
possible deflection
•Check pipe for coating damage and repair
•Check pipe ends for cleaniness and damage
•Mark entry point on spigot end and fit rubber in
socket groove
•Lubricate both spigot and socket ends well

24. Installing RRJ Pipe (cont’)
•Fit spigot end into socket ensuring the rubber is
not displaced during entry
•Use comealong with choked nylon strops to gently
draw in pipe until witness mark reached
•Check that rubber ring has not been pinched using
feeler gauges
•Install next pipe prior to releasing comealong

25. Example of our Rubber Ring joint. Note the witness line and the
excess lubricant which enables a smooth entry.

26. An example of a 650ø bend being installed using two gibaults into a
sewer rising main for Watercare Services.

27. Back Fill
•Backfill material shall be such that the external
Polyken wrapping system is not damaged during
compaction
•Backfill can be either material excavated when
laying cross-country or imported material PAP
size 7-20 under carriageways (no angular material)
•Compaction and reinstatement should be specified
by the contract

28. Questions and Answers