| 摘要 |
1311394 Laying pipes RORKONSULT FOR FJARRVARME I OREBRO AB 8 Nov 1971 [19 Nov-1970 28 May 1971] 51732/71 Heading F2P In a method of laying piping 1, 10 to carry either a hot or a cold fluid, the piping is heated or cooled respectively to a temperature above or below the normal ambient temperature and fixed in position at the elevated or depressed temperature. The temperature at which the piping is fixed in position lies between the maximum and minimum temperatures of the fluid to be carried in the piping such that the piping may withstand the expansion and contraction stresses developed. As shown for a main pipe 1 and a branch pipe 10 layed underground, the pipes may be attached, e.g. by wings, flanges or the like 11, 13 welded to the pipes, to concrete foundation members 6, 9 and earth is replaced along the piping trench. The pressure of the earth may be the sole fixing agent and the attachments to the concrete foundations may be ommitted. The Figure also shows a fluid consumer 12 and shut-off valves 2' 3 in inspection shafts 4, 5. |
