Table of Contents
What is pump piping system?
The purpose of pump piping is to provide a conduit for the flow of liquid to and from a pump, without adversely affecting the performance or reliability of the pump. However, many pump performance and reliability problems are caused or aggravated by inadequate system piping.
What is 10D rule?
This point of wisdom has been called the Rule of 10D, which means allow yourself a straight pipe of at least 10 times the diameter of pipe used between a plumbing elbow and an external pump.
How do you size a pump and pipe?
To calculate friction loss, divide the total length of pipe by 100 and multiply it by the friction loss factor. For example, 40 gpm through 290 feet of 2-inch pipe will result in a friction loss of 7.7 feet of water (290÷100*2.64). Then add the friction loss to the static head to determine the TDH.
How many types of pipes are there?
Different Types of Pipes Used in Plumbing
| Sr.No. | Different Types of Pipes |
|---|---|
| 1 | Acrylonitrile Butadiene Styrene Pipes (ABS) |
| 2 | Cast Iron Pipe |
| 3 | Chlorinated Poly Vinyl Chloride Pipes (CPVC) |
| 4 | Unplasticized polyvinyl chloride Pipes (uPVC) |
What is pump cavitation?
Cavitation occurs when the liquid in a pump turns to a vapor at low pressure. It occurs because there is not enough pressure at the suction end of the pump, or insufficient Net Positive Suction Head available (NPSHa). When cavitation takes place, air bubbles are created at low pressure.
What is pump curve?
A pump performance curve indicates how a pump will perform in regards to pressure head and flow. A curve is defined for a specific operating speed (rpm) and a specific inlet/outlet diameter. The curve also shows the shut off head or the head that the pump would generate if operating against a closed valve.
What is cavitation in pump?
How do I calculate pipe size?
The equation for pipe diameter is the square root of 4 times the flow rate divided by pi times velocity. For example, given a flow rate of 1,000 inches per second and a velocity of 40 cubic inches per second, the diameter would be the square root of 1000 times 4 divided by 3.14 times 40 or 5.64 inches.
What is the suction side of a pump?
The inlet, or suction side of a pump is the point of lowest pressure in a given pump. For positive displacement pumps, the lowest pressure occurs just prior to rotor meshing; for centrifugal pumps, lowest pressure is near the eye of the impeller.
What size Piping do I need for a suction pump?
PIPE DIAMETER ON SUCTION SIDE SHOULD BE EQUAL OR ONE SIZE LARGER THAN PUMP INLET Suction piping velocities should be limited to 7 to 8 feet per second or less. ELIMINATE ELBOWS MOUNTED ON OR CLOSE TO THE INLET NOZZLE OF THE PUMP Include 5 to 10 pipe diameters of straight run pipe between the pump inlet and elbow.
How can I avoid premature pump failure and pump piping pitfalls?
By following 5 simple rules, you can avoid premature pump failure and related pump piping pitfalls. KEEP SUCTION PIPING AS SHORT AS POSSIBLE Include a straight run pipe length equal to 5 to 10 times the pipe diameter between the pump inlet and any obstruction in the suction line. Note: Obstructions include valves, elbows, “tees”, and etc.
What are the requirements of a suitable pump piping design?
Pump piping should be designed with adequate space to facilitate the removal of the pump for maintenance purposes. Lifting facilities are provided where the weight of the component exceeds 25 kilograms. So it is required to provide space for mobile equipment to deliver damage-free maintenance.
How do you prevent air from getting into a suction pump?
Avoid high pockets in suction piping, which can trap air. Keep all pipe and fitting connections tight in suction vacuum conditions to prevent air from getting into the pump. ENSURE THE PIPING ARRANGEMENT DOES NOT CAUSE STRAIN ON THE PUMP CASING Pumps should never support the suction or discharge piping.