Doc No: OMM50001243
Rev: C Page 13 of 68
This document and all the information contained herein are the confidential and exclusive property of TechnipFMC,
and may not be reproduced, disclosed, or made public in any manner prior to express written authorization by TechnipFMC.
4.4
Discharge Piping Recommendations
1. Route the discharge piping in as short and direct a route as possible. Use the
same pipe size as the outlet of the pump. In installations where the discharge
piping is in excess of 50 feet (15 meters) it is suggested to use the next larger
size pipe to minimize friction losses downstream of the pump.
Table 1: Pipe Pressure Chart
Allowable Working Pressure For Steel Pipe (PSI @ 100F)
Pipe Size
(inches)
Pipe Schedule Number
40
80
160
XX
3/8
1,700
3,800
1/2
2,300
4,100
7,300
12,300
3/4
2,000
3,500
8,500
10,000
1
2,100
3,500
5,700
9,500
1 1/4
1,800
3,000
4,400
7,900
1 1/2
1,700
2,800
4,500
7,200
2
1,500
2,500
4,600
6,300
2 1/2
1,900
2,800
4,200
6,900
3
1,600
2,600
4,100
6,100
14.5 psi = 1 Bar
CAUTION
Always use pipe or hose that is designed for your particular pressure
requirements. Inadequate pressure ratings can allow hose or pipe to fail,
resulting in equipment damage and possible personal injury.
Normal hose pressure ratings are clearly marked on the outer surface of
the hose. Working pressure ratings of steel pipe can be obtained from
the manufacturer or from the chart shown in Table 1 above.
2. Always use a pressure gauge in the pump discharge line. A properly functioning
gauge mounted at the pump (and before any valves) is required to accurately
determine the operating pressure of a pump and to conduct troubleshooting.
3. Ensure that all piping is supported independently of the pump to reduce vibrations
and strain on the pump. Pulsation dampeners on the discharge are
recommended to reduce pressure pulsation and resulting vibration. The use of
elbows, nipples, unions, or other fittings should be kept to an absolute minimum.
Avoid short radius 90
elbows; use long radius elbows instead. To help isolate
and reduce mechanical and hydraulic vibrations, FMC recommends the use of
flexible pipe couplings between the pump and any rigid piping and the use of
pulsation dampeners.
