Sawsan311
Chemical
- Jun 21, 2019
- 303
Dear All,
As there are various types of pump suction strainers such as basket, Tee and Y type strainers which vary with respect to the need for automated flushing through blowdown, tolerance for heavy fouling services etc. What is the typical maximum allowable pressure drop which a designer need to account for a Tee strainer in determining the pump's NPSHA at the early design stage. Knowing that Crane considered around 35 D equivalent length for a suction Tee strainer, however when I compared such consideration to actual pump suction strainer vendor's pressure drop as 0.4 barg, I see that if the designer relies on specifying the strainer as a normal fitting without accounting for higher pressure drop contingency, there could be significant difference in the suction pressure calculated.
Therefore, for a typical low emulsion crude application, what should be the pressure drop contingency to be considered for suction Tee type strainer of a pump?
Appreciate your valuable views.
As there are various types of pump suction strainers such as basket, Tee and Y type strainers which vary with respect to the need for automated flushing through blowdown, tolerance for heavy fouling services etc. What is the typical maximum allowable pressure drop which a designer need to account for a Tee strainer in determining the pump's NPSHA at the early design stage. Knowing that Crane considered around 35 D equivalent length for a suction Tee strainer, however when I compared such consideration to actual pump suction strainer vendor's pressure drop as 0.4 barg, I see that if the designer relies on specifying the strainer as a normal fitting without accounting for higher pressure drop contingency, there could be significant difference in the suction pressure calculated.
Therefore, for a typical low emulsion crude application, what should be the pressure drop contingency to be considered for suction Tee type strainer of a pump?
Appreciate your valuable views.
