November 13, 2007

2 Pumps Load Case

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Let’s say we have 2 pumps as attached iso.One pump are working and the rest is standby.How can we setup pump load case by using caesar II

Input data:

Operating Temperature = 45 °C
Design Temperature = 80 °C
Operating Pressure = 7.5 Kg/cm2 g
Design Pressure = 15.0 Kg/cm2 g

 

 

Mat. A106 Gr.B #150 Lbs
Pipe Size 4″, Sch.Std
Corrosion Allowance 1.5mm
None Insulation
Density = 1000 (kg/m3)
2 pumps iso metric drawing
LOAD CASE DEFINITION KEY ( 2 PUMPS )

CASE 1 (HYD) WW+HP (without friction)
CASE 2 (OPE) W+T1+P1 (with friction)
CASE 3 (OPE) W+T1+P1 (without friction)
CASE 4 (OPE) W+T2+P1 (with friction)
CASE 5 (OPE) W+T3+P1 (with friction)
CASE 6 (OPE) W+T4+P1 (without friction)
CASE 7 (SUS) W+P1 (with friction)
CASE 8 (SUS) W+P1 (without friction)
CASE 9 (OCC) U1 (without friction)
CASE 10 (OCC) U2 (without friction)
CASE 11 (OCC) L11=L9+L10 (without friction)
CASE 12 (OCC) L12=L11+L8 (without friction)
CASE 13 (EXP) L13=L2-L7 (with friction)
CASE 14 (EXP) L14=L3-L8 (without friction)
CASE 15 (EXP) L15=L6-L8 (without friction)
CASE 16 (EXP) L16=L14+L15 (without friction)

Explain

Hydro Test Case

Case1: Hydro Test case, none-friction with WW=Water Filled Weight, HP=Hydro Pressure

Operation Case

Case2: Operating case with friction at operating temperature (T1=80°C), 2 pumps working
Case3: Operating case none-friction at operating temperature (T1=80°C), 2 pumps working
Case4: Operating case with friction, pumpA and (T2=80°C), pump B standby (T2=21°C)
Case5: Operating case with friction, pumpB working (T3=80°C), pump A standby (T3=21°C)
Case6: Operating case none-friction at TAMIN = 16°C ( For Stress Range Purpose ), 2 pumps at T4=16°C

Sustain Case

Case7: Sustain case with friction
Case8: Sustain case none- friction

Occational Case

Case9: Seismic Load ( X direction), none- friction
Case10: Seismic Load ( Z direction), none- friction
Case11: Seismic Load combined, none- friction
Case12: Sustain Case + Occational due to seismic, none- friction

Expansion Case

Case13:Expansion Case check with friction at operating temperature (T1=80°C)
Case14:Expansion Case check none- friction at operating temperature (T1=80°C)
This is stress check at maximum temperature, none- friction
Case15:Expansion Case check none- friction at mininum temperature (T4=16°C)
This is stress check at maximum temperature, none- friction
Case16:This case for stress range purpose, none- friction
[ minimum stress check(case15)+maximum stress check(case14)]

Please click link below to see videos about above tutorials

http://www.azpiping.com/tutorials/temperature-2pumps.htm
http://www.azpiping.com/tutorials/loads-2pumps.htm

 

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