LIGO Document D047823-v6

D047823- L4C Vacuum Chamber top

Document #:
Document type:
D - Drawings
Other Versions:
30 Apr 2010, 09:18
20 Feb 2010, 12:49
10 Jun 2009, 10:57
Chamber, side port L4-C seismometer
Files in Document:
Other Files:
Notes and Changes:
D047823-v6 L4C Top
- Changed flange flatness tol to .005" from .001"
- Added note 22 for tubing to flange welds.
- Removed note 17 from tubing to flange welds
- Removed Datum C. Tolerance call-outs have be changed to conform to the "simultaneous requirement" condition laid

out in ASME Y14.5. Thus Datum C can be removed without removing the features relationship.
"In the 1994 ASME standard, this is spelled out in paragraph (or of the 2009 edition): "Where

multiple patterns of features are located relative to common datum features not subject to size tolerances, or to

common datum features of size specified on an RFS basis they are considered to be a single pattern."

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