000			00862nam a2200169 4500
001			0000001744
008			110923
040			_aJMGHQ
090	0	0	_a672.832 _bCOM
245	0	0	_aComparison of corrosion resistance between steel and ductile iron
260			_c1986
300			_a5 p. _bill. _c30 cm
520			_aThe excellent durability of gray cast iron pipe has been achived without the use of heavy duty protective coastings. Older cast iron mains with services records exceeding 100 years were installed without exterior or interior coating. After 1860, most cast iron pipe for water service was dip-coated with a relatively thin bituminous caoting, not for protection of the exterior from soil corrosion but to reduce rusting of the interior by certain types of water.
650		0	_aWater-pipes
650		0	_aCast-iron pipe _xCorrosion
650		0	_aPipe filting
999			_c23081 _d23081