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Pressure classes, schedules and weights of pipes for threaded & socket welded fittings. Pipe Schedule and Designation Pressure Class2000300060009000 Threaded Fittings80/XS160XXS Socket-welded Fittings80/XS160XXS Standard (STD), Extra Strong (XS) and Double Extra Strong (XXS) ...
Plastics are used mainly in pipes, waterproof coating and PP fibres for the tunnel lining. Environmental impact hotspots in the construction phases The construction phases directly related to the RMR index (excavation and support) are responsible for the differences in environmental impact among the ...