County-wide central heating network replacement, with PU pre-insulated steel pipe supplied in batches.
The Shouyang heating source-replacement project renews the existing network, with the urban trunk lines and branch lines laid in batches.
PU prefabricated directly-buried insulated pipe was used; insulation thickness and jacket specification were set by the design temperature and burial depth. Delivery was staged and joint closures were supplied with the pipe so the network was closed before the heating season.
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