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2. Cross-linked polyethylene - Wikipedia

   en.wikipedia.org/wiki/Cross-linked_polyethylene

   A cross-linked polyethylene (PEX) pipe. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links.It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats.

3. Insulated pipe - Wikipedia

   en.wikipedia.org/wiki/Insulated_pipe

   Insulated pipes are commonly used for transport of hot water from district heating plants to district heating networks and for distribution of hot water inside district heating networks. Thermal insulation material usually used is polyurethane foam or similar, with a thermal conductivity λ 50 of about 0.024–0.033 W/(m·K).

4. Plastic pipework - Wikipedia

   en.wikipedia.org/wiki/Plastic_pipework

   Plastic Pipe lengths manufactured in Australia by extruding HDPE material.. Plastic pipe is a tubular section, or hollow cylinder, made of plastic.It is usually, but not necessarily, of circular cross-section, used mainly to convey substances which can flow—liquids and gases (fluids), slurries, powders and masses of small solids.

5. Natural gas pipeline system in the United States - Wikipedia

   en.wikipedia.org/wiki/Natural_gas_pipeline...

   Meanwhile, manufactured gas was more commonly used than natural gas in the early 19th century, first introduced in Baltimore in 1816 with underground pipes laid starting in 1851. [6] Gas plants could be sited within cities, and many major U.S. cities such as New York, Chicago, San Francisco had gas distribution lines for manufactured gas by the ...

6. Underground Service Alert - Wikipedia

   en.wikipedia.org/wiki/Underground_Service_Alert

   Underground Service Alert (USA) is a non-profit mutual benefit organization that links the excavation community and the owners of underground lines. Underground Service Alert has two separate call centers for California : Underground Service Alert of Northern California (USA North) and Underground Service Alert of Southern California (USA South ...

7. After decades of failure, California dusts off controversial ...

   www.aol.com/news/decades-failure-california...

   Here we go again. Gov. Gavin Newsom’s administration revived the Delta tunnel project Wednesday, unveiling a downsized version of the controversial, multibillion-dollar plan to re-engineer the ...