Download - ICEC 26

ICEC26-ICMC2016 New Delhi, India
Rossi Mendez
Sales Engineer – HHS
Author: Stefan Schaap
Project Engineer – HHS
March 16
ICEC-ICMC 2016
3
Demaco Design Scope
Demaco Design Scope
TL-SE
SIS100
Distribution Box
DB3
TL-SW
ICEC-ICMC 2016
Distribution Box
DB4
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ICEC-ICMC 2016
TL-FB5
4
TL-NW
4
SIS100 TL
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TL-Design Option 1
TL-Design Option 2
ICEC-ICMC 2016
1. Functional Specifications
2. Design Code
3. Transfer Pipe Dimensions
4. Pipe Configuration
5. TL in ARC-Part SIS100
6. Spool Layout
7. Thermal Expansion
8. Safety Assessment
9. Heat Load
10. Sensors
11. Vacuum
12. Testing
13. Time & Resources
14. Project cost
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Main considerations:
STRAIGHT LINE
Case Scenario 2
• Space constraints
• Process constraints
• Flow constraints
(such as pressure drop)
• Constructability
• Operability
• Manufacturing cost
Case Scenario 1
BENDED LINE
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ICEC-ICMC 2016
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Case Scenario 1
Bended Pipe
Pros
• Evenly distributed forces
• Follow the shape of the building,
optimum use of available space.
Cons
• More expensive
• Complex manufacturing sequence
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ICEC-ICMC 2016
Case Scenario 2
Straight Pipe
Pros
• Easy manufacturing
• Follow the shape of the building
Cons
• Lateral bellow forces
• It requires more space
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Define Protected System
Locate Relief devices
Fail Scenarios
Select relief device
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Acquire Data
50K/80K System – 0.2W/cm²
Demaco common practice
Design Code
4K System - 0.6 W/cm²
(W. Lehmann and G. Zahn)
ICEC-ICMC 2016
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Figure 9.1 Case 1; One safety valve on a transferline with vacuum barriers and multiple vacuum spaces
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ICEC-ICMC 2016
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Case Scenario 1
Vacuum Barrier & Safety Valve
Case Scenario 2
Safety Valves
Case Scenario 1
Valid for all CPP
\
Case Scenario 1
Case Scenario 2
Case Scenario 2
∆P ≤ 3%x Pset
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Design Code
Pressure Safety Valve (PSV)
EN13648-3
AD2000-A2
ICEC-ICMC 2016
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• Demaco recommends to use a straight line, even though a bended line may be
convenient (stress distribution). This type of transfer line is common for manufacturers
of transfer line.
• Straight transfer lines are more economical (30% less) than bended transfer lines.
• Safety assessment- measures are necessary to protect the line from excessive
pressure during Loss of Insulating Vacuum (LIV).
• Safety valve locations in the 4K supply line and 4K suction line are critical (Safety
Assessment – TL-NW) due to pressure loss in the TL.
• Vacuum barriers / safety valves are viable options for protecting transfer lines
against LIV. Demaco recommends use of vacuum barriers with a reduced number of
safety valves.
March 16
ICEC-ICMC 2016
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Multiple Helium transfer lines
XFEL-DESY / Germany
LHe
Multiple Helium transfer lines and Valve Boxes
DESY / Germany
LHe