flange thickness
TRANSCRIPT
8/11/2019 Flange Thickness
http://slidepdf.com/reader/full/flange-thickness 1/3
MEMORANDUM SCOPUS ENGINEERING LIMITED
To: All Surveyors From: Scopus QA/QC
Subject: Flange Survey Requirements Date: 31/07/14
Reference: Flange Survey Requirements
There have been instances recently where TP flanges have been calculated incorrectly. In some
cases this has caused Pipework to be fabricated dimensionally incorrect and subsequent rework
required.
Upon investigation the surveyed Flanges have had a thickness of 0mm input during Survey
calculations causing the 3D Asbuilt position of the Flange to be incorrect.
The investigation also revealed that no log file data showing the input Flange thickness of 0mm was
present in the relevant field.
Input of the correct Flange thickness, Interrogating flange survey data and log files, being aware that
some data may be missing and making corrective action prior to formal issue of results is of
paramount importance and the responsibility of both Surveyor and Survey checker.
All Scopus surveyors are therefore reminded that all dimensional control surveys, processing,
finalising and issuing of formal results must be in accordance with Scopus LRQA ISO 9001 2008
accreditation and in house procedure SCOP-DSC-003.
It is of the utmost importance that ALL Survey results are correct at time of issue and any incorrect
input of data identified and corrected pre issue.
Included is a typical example of Flange data input with 0mm thickness which in turn places the
surveyed Flange in an incorrect position- correct input of data also included
Note- the Survey Program Code is currently being modified to prevent a thickness of 0mm being
entered.
However, prior to the issue of the updated Survey Program ALL Surveyors must be aware of the
issues noted above and ensure input of 0mm or incorrect input of Flange thickness are identified and
corrected prior to the formal issue of Survey results.
8/11/2019 Flange Thickness
http://slidepdf.com/reader/full/flange-thickness 2/3
GENERAL REQUIREMENTS FOR MIRRORING A SURVEYED FLANGE
1
0mm
Thickness
entered
When checking survey be aware
that if flange data for thickness is
entered
as
0mm
there
will
be
no
field
for
thickness
in
log
file.
F01 of
surveyed
flange
E.
406419
N. 204776
EL.+24727
C012 ‐ Direction Survey Point
Scripted flange in incorrect position.
When
flange
thickness
is
entered
as
0mm,
the
scripted
position
of
mirrored
flange
is
incorrect.
Flange m01
C014 ‐ Bolt Survey Points
C013 ‐
Face 3 Survey
Points
Incorrect Thickness Entered
8/11/2019 Flange Thickness
http://slidepdf.com/reader/full/flange-thickness 3/3
GENERAL REQUIREMENTS FOR MIRRORING A SURVEYED FLANGE
2
Correct
Thickness
entered
Flange thickness entered as
measured by taping on site.
Scripted flange in correct position.
Mirroring
flange
by
thickness,
raised
face, and
gasket sum.
C013 ‐ Face 3 Survey Points
Flange m01
C014 ‐ Bolt
Survey
Points
F01 of surveyed flange
E.
406454
N.
204776
EL.+24729
Correct Thickness Entered
C012 – Direction Survey Point