For these distances 4 tph can be done in a 4 inch line with approx 1000m3/hr@ 200-250 mbar vac. giving a solid loading ratio of around 5 and a pick up velocity of about 23 m/s and exit velocity of 31 m/s.

Keep the velocity to a minimum because soap will smear on the pipe walls and smearing increases with increase in velocity. Your pressure drop calculation of 50-mbar vac. is bit low it should be around 150- 200 mbar mark. ■

Kowie baat nahie Ahsan Shaab Pleasure is all mine. Just out of curiosity how are you indenting to check the values. ■

I would be concerned about the conveying process you have choosen. I am not saying that it is wrong, but you might have a lot of problems when you run it for the first few weeks.

What about product damage? I am assuming (may be incorrectly) that this product would have a friable structure and slamming it into elbows at 100 kpm would really cause a mess.

The earlier tread warned about smearing in the pipes. We might vene go one step farther to say possible blockages. This might be especially the case if this material can cling to itself in the pipes almost similar to conveying carbon black.

Be careful with this system and good luck.

Contact me if you would like any personal advise of help with your project. ■