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ASTM Underground Welding Tube
1.inner carrier pipe
2.middle polyurethane insulation layer
3.outer HDPE protection pipe/GI/GRP
1.district heat and cold supply
2.for liquid transport
3.oil and gas transport
4.chemical and other anti-corrosion
2.built on stilts
1.good insulation properties ,low heat loss
(the 25% of traditional pipes),
3.waterproof and corrosion resistance
4.no trench, be directly buried in ground or water
Self-stressing concrete pipe
Used for water pipeline with working pressure of 0.4~1 mpa.Inner diameter 100~600 mm.Adopt socket and socket joint and circular section rubber ring seal to stop water.This is a kind of reinforced concrete pipe which USES expanded cement to tensify steel bars to produce prestress.
Cast iron pipeUsed for water piping with working pressure not exceeding 1 mpa.There are three kinds of low pressure pipe (less than 0.45 mpa), general pressure pipe (0.45~0.75 mpa) and high pressure pipe (0.75~1 mpa). The pipe diameter can reach 1200 mm.There are continuous casting and sand casting (vertical and centrifugal) two kinds of tube technology.