Since the invention of Ductile Iron, also known as Spheroidal Graphite Iron or Nodular Cast Iron in 1949, it has become the most preferred pipe material for water supply and pressure sewerage applications around the world.ince the invention of Ductile Iron, also known as Spheroidal Graphite Iron or Nodular Cast Iron in 1949, it has become the most preferred pipe material for water supply and pressure sewerage applications around the world.
The 1994 Federal Register TRI listing of chlorsulfuron (59 FR 1788, January 12, 1994) also cited a slight treatment-related decrease in maternal fertility in the F3 generation observed in a rat chronic toxicity study (Ref.
Å Inorganic chemical production -- which includes titanium dioxide, hydrogen chloride, and sodium and calcium hypochlorites -- accounted for 13% of national chlorine consumption in 1995. Å Direct applications -- such as bleached paper products, water treatment, and metals production - - consumed 11% of national chlorine consumption in 1995.