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GRP PIPING FOR TRENCHLESS TECHNOLOGY INSTALLATION
By Lee Skinner
C.Eng B.Eng (hons) MICE
TT-GRP PIPING SYSTEMS
INTRODUCTION
TT-GRP PIPING SYSTEMS INTRODUCTION TO SABAS:
• SABAS GRP Technology Company
• In the field of trenchless GRP pipelines for over a
decade
• GRP products installed in India since 2000
• Offer injection moulded GRP Sewer liners
• GRP Jacking/Tunneling Pipe
• FW piping systems for general application
TT-GRP PIPING SYSTEMS GENERAL APPLICATION AREAS:
• Water transmission (both raw and potable)
• Sewerage collection and outfalls
• Storm water systems
• Seawater intake and cooling water outfall lines
• Blowdown lines and water circulation for power
stations
• Industrial effluents
TT-GRP PIPING SYSTEMS HISTORY:
• GRP was first commercially applied by Owen’s corning in 1942
• The first buried underground GRP fuel storage tank was installed in Chicago in 1964. In 1985 sample coupons were cut from the tank and analyzed. The tank was found to be in good condition, meeting all requirements as if it has been installed today; the tank remains in service.
• The first GRP pipes were produced in the 1960’s.
CNC controlled winding plant
FULLY AUTOMATED PLANT
CNC controlled winding plant
AUTOMATED PRODUCTION
Controlled curing
CONTROLLED CURING
CNC controlled winding plant
HIGH-QUALITY OUTPUT PRODUCT
TT-GRP PIPING SYSTEMS
ADVANTAGES OF GRP PIPE
TT-GRP PIPING SYSTEMS FEATURES AND BENEFITS:
• Designed for minimum 50 year service life
– Designed for service in corrosive environments
– Flexible material
A Flexible Material!
A Flexible Material!
TT-GRP PIPING SYSTEMS FEATURES AND BENEFITS:
• Designed for minimum 50 year service life
– Designed for service in corrosive environments
– Flexible material
• Lightweight compared to other materials
• Economical (performance driven)
• Over 40 years industry service
• Low friction factors – low OPEX
Dense polymer mortar core
• Dissipates heat during curing
• Allows for the casting of thicker laminates
• Provides material cost savings
• Adds stiffness
High strength glass reinforced layers
• Efficient design through bespoke fibre design
• Orientation tailored for specific application.
Resin rich anti corrosion layer
• Formed from flexible corrosion resistant gel-coats
• Designed for specific environment
• Layer regulated and reinforced with chopped
strands, synthetic & glass fibre tissue
SABAS pipes and liners are made from a high-strength composite
material that is formed from a new and innovative closed-mold
process.
It is this unique process and resultant material that gives the system its
great strengths:
SABAS Injection Moulded Composite
THE BALANCED COMPOSITE
Yields I-Beam Effect
Most Efficient Use of Materials
Stiff Lower-Cost Core
High-Cost Reinforcing
High-Cost Reinforcing
Bending Moment Diagram
TYPE II LINING MATERIALS - SHORT TERM FLEXURAL MODULUS
-
500,000
1,000,000
1,500,000
2,000,000
2,500,000
SABAS 1 CIPP PVCu PP 1 Polyethelene
Materials as per WRc SRM, Manufacturer Data & Efunda
Es (
psi)
SABAS GRP Lining System Material Es -
Design Range
TYPE II LINING MATERIALS - LONG TERM FLEXURAL MODULUS
0
2000
4000
6000
8000
10000
12000
SABAS 1 CIPP PVCu PP 1 Polyethelene
Materials as per WRc SRM, Manufacturer Data & Efunda
EL (
MP
a)
SABAS GRP Lining System
Material EL - Design Range
TYPE II LINING MATERIALS - ULTIMATE BENDING STRENGTH
0
50
100
150
200
250
300
350
400
450
SABAS 1 CIPP PVCu PP 1 Polyethelene
Materials as per WRc SRM, Manufacturer Data & Efunda
Ss (
MP
a)
SABAS GRP Lining System
Material Ss - Design Range
TT-GRP PIPING SYSTEMS HISTORY:
• GRP was first commercially applied by Owen’s corning in 1942
• The first buried underground GRP fuel storage tank was installed in Chicago in 1964. In 1985 sample coupons were cut from the tank and analyzed. The tank was found to be in good condition, meeting all requirements as if it has been installed today; the tank remains in service.
• The first GRP pipes were produced in the 1960’s.
TT-GRP PIPING SYSTEMS
TRENCHLESS TECHNOLOGY
APPLICATIONS
TT-GRP PIPING SYSTEMS SEWER AND PIPE LINING INTRODUCTION:TT
• Governed by WRc design and installation rules since
1984
• Ideal for larger diameter lines
• Ideal for non-circular
• Provide very economic solution compared to CIPP
for larger diameters
TT-GRP PIPING SYSTEMS WRc DESIGN PRINCIPLES:
• Governed by WRc design and installation rules since
1984
• Type II Design – liner designed as a flexible
independent structure
• Type I Design – host, annulus grout and liner
designed as composite rigid structure
• GRP IS THE ONLY MATERIAL APPLICABLE UNDER BOTH
DESIGN CODES
PREPARATION - DESILTING
PREPARATION - CCTV SURVEY
3. GROUT VOIDS
A FULLY RENOVATED SEWER WITH A 50 YEAR DESIGN LIFE
1. LOWER & DRIVE HOME
2. GROUT ANNULUS
ONE-PIECE LINING SYSTEM
Bhairon Road - Before
Bhairon Road - After
Raj Ghat - Before
Raj Ghat – After
Gwinnett County, GA
GWINNETT COUNTY, GA
Before After
TT-GRP PIPING SYSTEMS SLIP-LINING OF TUNNELS:
• Casing pipes may be required due to engineering conditions
• Concrete or steep pipes may provide inefective service performance
– Pressure performance
– Corrosion resistance
• GRP pipe can be installed (as with old pipe), to give inner carrier pipe designed against grouting and long-term performance requirements
TT-GRP PIPING SYSTEMS
SUMMARY &
CONCLUSIONS
TT-GRP PIPING SYSTEMS REVIEW OF GRP PIPE CONSIDERATIONS:
• Is corrosion and issue
• Conveyed fluid (eg, hydrocarbon, potable water)
• Does lightweight provide installation advantage
• Review of physical requirements against other
polymer pipes/traditional materials
• Determine competitive envelop
TT-GRP PIPING SYSTEMS TRENCHLESS INSTALLATION APPLICATIONS:
• Sewer Lining
• Storm drain lining
• Potable water transmission main lining
• Tunnel lining
• Jacking and microtunnelling
TT-GRP PIPING SYSTEMS REVIEW OF GRP PIPE CONSIDERATIONS:
• Corrosion resistant
• Flexible piping system
• Lightweight
• Economic
• Smooth bore, improving flow and reducing costs in
pumped systems
• Tried and tested in the field for over 40 years
GRP PIPING FOR TRENCHLESS TECHNOLOGY INSTALLATION
By Lee Skinner
C.Eng B.Eng (hons) MICE
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