In New Orleans, new 12-in. carrier pipe was placed inside old 20-in. main, which now serves as casing; reducing pipe size at each end of crossing under railroad had little effect on line's ability to handle load; pressure drop was increased only 3 psi at maximum load; for corrosion protection, 3/4 in. reinforced concrete coating over usual coal-tar enamel and asbestos felt wrapping was used; annular space was filled with saturated lime water as rust inhibitor.
Repairing a railroad crossing
Am Gas J
American Gas Journal ; 192 , n 3
1965
2 pages
Article (Journal)
English
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