A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LDC uses internal inspection camera to evaluate, repair line
Significant failures at the butt fusion joints on 2 and 4 inch diameter 3408 polyethylene pipes due to cold fusion forced Southwest Gas, Las Vegas, Nevada, to inspect and repair their plastic distribution system in a save and cost-effective manner with minimal service disruption. To inspect, identify, and locate the suspect cold fusion joints a camera with a 500-ft maximum lineal cable distance supplied by Pearpoint Ltd, Bordon Hampshire, England, was modified and tested. For camera insertion a suitable fitting was developed by modifying a Style 90 Dresser coupling. Using a modified camera gland and a bypass fitting, the camera could be inserted up to 500 ft into an in-service main without disrupting service. The procedures of bypass installation and camera insertion are described. A split coupling to reinforce the cold fusion joints by electrofusion was used to repair the pipes. Reinforcement cost was 5.24 USD/ft compared to 15.57 USD/ft for replacement. For the identification of unknown pipe materials of acquired gas systems by color differences a camera to internally inspect service lines smaller than 0.5 inch CTS was selected from Welch Allyn and Olympus. Similar cost savings could be realized
LDC uses internal inspection camera to evaluate, repair line
Significant failures at the butt fusion joints on 2 and 4 inch diameter 3408 polyethylene pipes due to cold fusion forced Southwest Gas, Las Vegas, Nevada, to inspect and repair their plastic distribution system in a save and cost-effective manner with minimal service disruption. To inspect, identify, and locate the suspect cold fusion joints a camera with a 500-ft maximum lineal cable distance supplied by Pearpoint Ltd, Bordon Hampshire, England, was modified and tested. For camera insertion a suitable fitting was developed by modifying a Style 90 Dresser coupling. Using a modified camera gland and a bypass fitting, the camera could be inserted up to 500 ft into an in-service main without disrupting service. The procedures of bypass installation and camera insertion are described. A split coupling to reinforce the cold fusion joints by electrofusion was used to repair the pipes. Reinforcement cost was 5.24 USD/ft compared to 15.57 USD/ft for replacement. For the identification of unknown pipe materials of acquired gas systems by color differences a camera to internally inspect service lines smaller than 0.5 inch CTS was selected from Welch Allyn and Olympus. Similar cost savings could be realized
LDC uses internal inspection camera to evaluate, repair line
Romero, A. (author)
Pipe Line and Gas Industry ; 82 ; 43-46
1999
4 Seiten, 5 Bilder
Article (Journal)
English
Inspection, Repair and Post-Repair Fatigue Behavior
| British Library Conference Proceedings | 2004