JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 45

Focus
Year of construction 2008 - 2009 Pipe length 12.612 km Pressure class PN 1 Diameter DN 800 – DN 2000 Stiffness class SN 15000 Installation method open cut Application SewerLine® Client City of Yiwu Advantages low weight, high stiffness, simple cost-effective installation also in large depths, absolute leak tightness, corrosion resistance

efficient installation in great depths and weak soils. The project required a maximum trench depth of 18 m with an average depth of 7 m. The extra-strong pipe proved to be an intelligent and flexible solution that also ensures longterm stability.

Obvious advantages
The municipality of Yiwu opted for Hobas centrifugally-cast glass fibre-reinforced pipe systems for a number of reasons: 1) the above-mentioned weak soil conditions, for instance, would have complicated the use of heavy equipment. However, because CC-GRP pipes are significantly lighter than other materials, they are easily installed without special equipment. 2) The presence of a road near the pipeline route meant that installation had to be quick, space-saving and flexible at this location to avoid any traffic disruptions; here again, the challenge could be met by using composites pipes, which are easily handled. 3) Leak tightness was another important criterion for the choice of material due to the risk of groundwater contamination. GRP pipes and couplings have been subjected to stringent short- and long-term tests and are provably leak tight. 4) Pipes are often exposed to external influences, especially in coastal areas, so corrosion resistance was yet another
HOBAS gravity pipes SN 15000 enabled a cost efficient installation in great depths and weak soils.

crucial factor in the decision-making process. Hobas’ highly corrosion-resistant pipe systems can easily withstand environmental influences.

Full package service
This demanding project started in July 2008 and the pipeline went into service in early 2009. Hobas is the sole provider of centrifugally cast GRP pipe systems in the Chinese market, supplying clients with both the material and the required planning and installation expertise. For this project, the package is already yielding its fruit for all parties involved, who are highly satisfied with the product choice and the cooperation. More information: www.hobas.com Contact: info@hobas.com

Trenches up to 18 m depth were excavated for the project.

2.9 km of pipes sized DN 800 to 2000; and for the third and longest part, 7.4 km of pipes sized DN 800 to 2000. The complete line was built with gravity pipes and a stiffness of SN 15000. This enabled a cost-

No57 May 2010 / jec composites magazine

45


http://www.hobas.com

JEC COMPOSITES MAGAZINE - Issue #57 - May 2010

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #57 - May 2010

Cover
Editorial
Market Place
Advertisers
Index
Contents
NEWS WORLDWIDE
- Companies
- Agenda of events
- Equipment
BUSINESS
- Market survey
- Trends
- Niche Market
- Human Capital
FEATURE - AUTOMATION
- 3D X-ray
- Process
- CNC
- Control
- FCS
- Filament winding
- Robotics
USERS' PLATFORM
- Composites in the world
- Successful Partners
- Application
KNOW-HOW
- Preform Control
- Thermoplastics
- Mould
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - Cover
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 2
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - Editorial
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - Market Place
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - Index
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - Contents
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 7
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Companies
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Equipment
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 11
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 12
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 13
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 14
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Market survey
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 17
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Trends
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 19
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 20
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 21
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 22
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Niche Market
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Human Capital
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - FEATURE - AUTOMATION
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - 3D X-ray
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 27
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Process
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 29
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 30
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - CNC
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Control
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 33
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 34
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - FCS
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 36
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Filament winding
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Robotics
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - USERS' PLATFORM
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 41
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Successful Partners
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 43
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Application
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 45
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 46
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 47
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 48
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Preform Control
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 51
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 52
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Thermoplastics
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 54
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 55
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - - Mould
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 57
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 58
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 59
JEC COMPOSITES MAGAZINE - Issue #57 - May 2010 - 60
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