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19.08.2013
Live Mains Insertion: Trenchless Gas Main Renewal
The cast iron mains replacement technique that offers maximum operational flexibility with the ability to upgrade the pressure. Live Mains Insertion is similar to dead insertion of polyethylene pipe (PE) into a cast iron main with one very beneficial difference. By using a special gland box, the old main is kept live throughout the insertion process and can therefore maintain gas supplies to customers via the annular space until it is operationally convenient to transfer the services to the new PE main. www.plcsusa.com
 
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