1. Engineering
  2. Mechanical Engineering
  3. 1 using the nomogram and charts figures 1 and 2...

Question: 1 using the nomogram and charts figures 1 and 2...

Question details

1. Using the nomogram and charts (FIGURES 1 and 2) on pages 4 and 5, determine the diameter of a suitable air main for the distribution of 6 m3 min1 FAD. System pressure is 6 bar, the length of the pipe run is 175 metres, and a maximum pressure drop of 0.3 bar is allowed. The distribution main must also include the following .4 bends (2d) .2 elbow fittings .6 tee connectors 2 diaphragm valves 2. Describe the relevant advantages and disadvantages of using steel, copper or plastic pipe for a distribution main

Equivalent pipe length in m Types of fitting Inner pipe diameter in mm 25 40 50 80 100 125 150 Sear valve 3-6 5-10 7-15 10-2515-30 20-5025-60 2 2.0 3.04.5810 0.3 0.50.7 10 1.5 2.0 2.5 15 2.53.5 57 1O 15 0.3 0.50610 1.5 20 2.5 150.25 03 0.5 08 1 15 2 3 4 7 10 1 20 0.5 0.71.0 20 25 3.5 4.0 Diaphragnm valve Gate valve Elbow Bend rad Bend r-2d Hose conne- ction Tpiece DAI Reducer FIG. 2 Table of equivalent pipe lengths for valves and fittings as used on air distribution systems

Internal dia Flow of free of pipe air in di s hrough pipe Air pressure in mbarm in bar 90 1000 60 500 20 200 10 32 35 100 5.0 4.0 3.0 25 10 10 15 1.0 Medium weighi steel pipe to BS 1387 FIG. I Pipe sizing nomogram

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution