The International Society for Trenchless Technology

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... required for the product pipe. During the pilot bore the direction of the drill string is controlled by the orientation of a slanted face to the drill head, eccentric fluid jets or a combination of these, ...
2. Communication & Outreach
(Pages/Generic)
... technology. The CD proceedings containing these papers are distributed to all conference attendees. ISTT makes the full library of technical papers from past No-Dig Conferences available free of charge ...
3. Close-Fit Slip Lining
(News/Guidelines)
... The versatility of thermoplastic pipe has spawned the development of a wide range of innovative close-fit pipe lining systems.  These systems can be classified under one of two generic system types, ...
4. Epoxy & Polyurethane Linings
(News/Guidelines)
... 2 hours. Both liners are thinner than cement mortar liners. However, these liners are more expensive and require careful quality control during application and curing to ensure that the lining is free ...
5. Polyurethane Lining
(News/Guidelines)
... 2 hours. Both liners are thinner than cement mortar liners. However, these liners are more expensive and require careful quality control during application and curing to ensure that the lining is free ...
6. Cement mortar Liner
(News/Guidelines)
... such as cutters and chain flails. Some of these techniques are used in combination to help ensure that the host pipe is descaled, cleaned, and dry prior to application of the spray-on lining.  Cement ...
7. Vacuum Excavation Potholing
(News/Guidelines)
Vacuum excavation systems combine pressurized jetting and suction equipment to support a number of construction and trenchless applications. These systems come in a wide variety of sizes. They may be self ...
8. Mole Ploughing
(News/Guidelines)
... traditional underground construction methods requiring wide trenches. These two techniques use plows, cutter chains, or disc to open a furrow or narrow trench in which a flexible pipe or cable is inserted.  ...
9. Narrow Trench
(News/Guidelines)
... traditional underground construction methods requiring wide trenches. These two techniques use plows, cutter chains, or disc to open a furrow or narrow trench in which a flexible pipe or cable in inserted.  ...
10. Ground Pentrating Radar
(News/Guidelines)
There are a wide range of techniques available to locate buried pipes. Most of these systems use electromagnetic waves or signals transmitted into the ground or from underground utilities. These technologies ...
11. Leak Detection
(News/Guidelines)
... also travels with the product flow. These in-pipe systems provide an accurate location of leaks, since the sensor passes over the leak as it traverses the pipe. The in-pipe systems can be used in both ...
12. Localized Sealing
(News/Guidelines)
... by stainless steel retaining rings or cylinders. The second type of localized seal is used to seal connections between mains and laterals. These seals use a fabric gasket or liner impregnated with resin, ...
13. Potholing
(News/Guidelines)
Vacuum excavation systems combine pressurized jetting and suction equipment to support a number of construction and trenchless applications. These systems come in a wide variety of sizes. They may be self ...
14. Potholing for Local Repair
(News/Guidelines)
Vacuum excavation systems combine pressurized jetting and suction equipment to support a number of construction and trenchless applications. These systems come in a wide variety of sizes. They may be self ...
15. Join ISTT
(Uncategorised Content)
... ISTT members are eligible for membership discounts at ISTT sponsored events when offered. Corporate members may elect to name two individuals to their membership. These members receive all the privileges ...
16. What is ISTT
(Uncategorised Content)
... the years that followed, ISTT affiliated with regional trenchless societies located throughout the world to advance these objectives globally. ISTT has 27 Affiliated Societies. (Click here for list of ...
17. Organization
(Uncategorised Content)
... Executive Director and Membership Secretary who manage and implement the programs and activities of ISTT. (Click here for backgrounds on each of these people)  ...
18. Awards and Recognition
(Uncategorised Content)
... representing more than 40 countries that share this mission. More than a dozen of these societies have been affiliated with ISTT since the early 90s. Seven have been members of ISTT for more than 20 years. ...
19. Disclaimer
(Uncategorised Content)
... by the use of information presented there, only the author of the respective pages might be liable, not the one who has linked to these pages. Furthermore the author is not liable for any postings or messages ...
20. 2011 ISTT No-Dig Award Winners
(Uncategorised Content)
... natural gas transmission pipeline projects in China were used to calibrate the model. The addition of these variables, which included reamer diameter, improved the accuracy of rotational torque estimates, ...
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