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This image presents an overview of the various pipe extraction processes. (Image: Overview of different pipe extraction processes) |
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Preconditions for the application of pipe extraction:
The table below shows the various material option for the old and the new (to be replaced) pipelines. (Table: Pipe extraction - Possible materials of the old and new pipeline [FI-Steina]) |
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The pipe extraction method is used if the condition of the pipe includes the following:
Precondition for the application of pipe extraction: Possibility of installing pulling in rods or winch cables into the pipe to be replaced. (Image: Steel potable water pipe with iron and … |
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Advantages of pipe extraction compared to the open cut method:
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Congratulations! You have successfully finished this lesson. Next you will have the opportunity to review the newly acquired knowledge with an interactive questionnaire. You can of course still navigate back to any point in the lessons if you wish to review a specific point or subject. Stay curious! |
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Nov 04, 2016 This module deals with the trenchless replacement of gas, water, wastewater pipelines by means of the pipe extraction method. The pipe extraction methods with split cone, pull hose, auxiliary pipe, and based on the split and cut method are presented. After completing this module, you will have knowledge of:
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(Image: Reinforced concrete pipe) The quality of the embedment is decisive for the load transfer and for the lifecycle of the pipe system. The following table presents the concrete pipe installation considerations for inspectors and contractors [[FI-American Concrete Pipe Association]]. (Table: Concrete Pipe Installation Considerations) |
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(Image: HDPE pipe) The following table presents the HDPE pipe installation considerations for inspectors and contractors [[FI-American Concrete Pipe Association]]. (Table: HDPE Pipe Installation) |
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(Image: PVC pipe) The Uni-Bell PVC Pipe Association's installation guide for gasketed-joint PVC pressure pipe serves as general guideline for PVC pipe installation. Accordingly, the table below encompasses relevant information. (Table: PVC Pipe Installation Considerations) |
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(Image: Glass fibre reinforced plastic pipe (GRP pipe)) Detailed calculations and comprehensive planning by licensed engineers are needed for the accurate and correct installation of GRP pipes. In addition to the applicable standards and guidelines, the requirements for each installation and the operating conditions for each project shall be evaluated by engineers [[HOBAS GRP Guide]]. The table below presents the most important considerations for … |
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(Image: Centrifugally cast fiberglass-reinforced, polymer mortar (CCFRPM) pipe) Centrifugally Cast Fiberglass-Reinforced, Polymer Mortar (CCFRPM) pipe can be economically designed for non-pressure and pressure service by modifying the quantity, positioning and orientation of the glass fiber-reinforcements [[HOBAS CCFRPM Guide]]. The table below presents major installation considerations related to Centrifugally Cast Fiberglass-Reinforced, Polymer … |
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A correct and proper installation will add to the useful life of ductile iron pipe. The [[DIPRA Installation Guide]] provides information about installation procedures, maintenance, and reccomended safety precautions. However, appropriate standards and specifications must be used according to project requirements. The following table present major installation considerations of ductile iron pipe. (Table: Ductile Iron Pipe Installation Considerations) |
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[[DIPRA Installation Guide]] specifies that "the trench laying condition with respect to the trench bottom is usually specified by the engineer or utility". There are five standard laying conditions described in [[ANSI/AWWA C150/A21.50]]. (Table: Standard laying conditions for Ductile Iron Pipe) |
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Mar 01, 2017 Below is a step-by-step overview of ductile iron pipe installation by the modified method A, as per [[ANSI/AWWA C150/A21.50]], according to [[DIPRA Installation Guide]]. (Video: Step by step installation of modified method A (ANSI/AWWA C150/A21.5) according to [DIPRA] [Image: visaplan GmbH] - Normal dry trench conditions) Video: Step by step installation of modified method A ([ANSI/AWWA C150/A21.50]) according to [DIPRA (2016)] [Image: visaplan GmbH] - … |
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(Image: Vitrified clay pipe) Vitrified clay pipe is the longest lasting sewer pipe available, and it is inherently used for gravity sewer pipe installations. Following are the major aspects of Vitrified Clay Pipe installation considerations. (Table: Vitrified Clay Pipe Installation Considerations) |
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The transportation and positioning of the pipes within the trench should principally be performed using equipment specifically designed for this task. When moving particularly heavy pipe sections, the equipment operating limits should be strictly followed. In principle, only equipment adapted to the pipe (such as pipe grabs, etc.) should be used for transporting and lowering the pipes into the trench. Large concrete pipes usually have built-in lifting … |
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Connection of the individual pipe segments must be performed according to the manufacturer's specifications. In addition:
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The connections of pipes to manholes and structures must be articulated. A concrete seat may also be installed under the connection to provide added support. The same applies if settlement is expected. In addition, when connecting lateral sewer pipes to manholes, flexible watertight connectors should be used, unless otherwise specified in the owner's specifications. (Image: Lateral joint connection – concrete pipe) (Image: Lateral joint connection – … |
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Aug 22, 2016 After establishing the pipe connections, the bedding around the joint area must be carefully compacted. General recommendations and restrictions are given in table 2 in [[ASTM D2321–05]] for the foundation, bedding, initial backfill, embedment and final backfill. (Table: General recommendations for installation and use of soils and aggregates as per [ASTM D 2321-05]) |
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