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DP-1340 General Layout Assembly concepts, Criteria for design selection …
DP-1340
General Layout
Assembly concepts
Case only Designs
(No outer cylinder) stamped/formed
X axis split
Tailored/fitted geometry (see above)
Cylindrical
Z axis split
Tailored/fitted geometry (see above)
Cylindrical
Y axis spit
Cylindrical
Tailored/fitted geometry
cons
PED unknown - Difficult to simulate
Pros
Modular construction
Ease of assembly
Outer Cylinder (Pipe) Designs
Without Pan/Case
Concentric flow splitter
Weld neck reducer + Flow splitter end cap
Large diameter flow splitter end cap
:
outer cylinder, split down middle
easier to get PED approval
potentially inefficient use of space
'Cassette' type design to slide over brazed assy
Eccentric flow splitter
Large diameter eccentric flow splitter end cap
Large diameter eccentric weld flow splitter end cap
With Pan/Case
Solid case (Machined)
Like the ECUP
Different assembly method for larger size meters with larger tube profiles
longer installation length for size 50 and 80??
Optional secondary containment - different casing
Criteria for design selection
Function
Pressure (PED)
Temperature stability
Stiffness/stability
Form
Assembly efficiency
Number of conponents
Scalability
Aesthetics
Volume manufacturing
Parts reuse
Materials usage
Fit
Repeatability
Manfacuring processes
Assembly accuracy
cost
Risk
