Laser Tip3 Pipe Strains
1
Before the suction and discharge flanges are broken - take a "null" reading with the Rotalign ® Pro. That is, take a reading which will leave all zeros in the results screen. You do this by setting up the Pro as you normally would - then press and then the soft key but do not turn the shafts at all! Next press the soft key after which the Pro will tell you "This measurement is questionable!" Ignore the note & press the soft key & then press the yellow results key and you will have an all zero “null” alignment! Now start the “Move” mode by pressing the soft key. Next, observe what changes occur when the suction and discharge flanges are broken. The changes you see are exactly what the pipe strain is doing to the alignment at the coupling as you are monitoring the shaft centerlines! You might find 2 mils (.002”) to be a very tight tolerance for pipe strain on some applications. Some industrial plants have relaxed that to 5 mils (.005”) which might be a better starting point. As the people get where they accept the 5 mils they themselves will tighten the tolerances. Have a Grand Day! Norm Voelzow Start sweep M © Voelzow & Company, Inc. • Wingate, NC 2004 Pipe Strain 02/13/2004 V oelzow & Company, Inc. P. O. Box 158 • Wingate, NC 28174 Phone: 704-233-9222 • Fax: 704-233-9211 E-Mail: [email protected] Web: http://www.LaserAlignment.net/ Pipe Strain Do Not Loosen the Bolts Yet! Question: Can we check Pipe Strain with our Rotalign ® Pro? Answer: Yes, the Rotalign ® Pro is great for checking Pipe Strain! Pipe Strain Pipe Strain Pipe Strain Pipe Strain
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Laser alignmnt tips dealing with pipe stress
Transcript of Laser Tip3 Pipe Strains
Before the suction and dischargeflanges are broken - take a "null"reading with the Rotalign® Pro. That is,take a reading which will leave all zerosin the results screen. You do this bysetting up the Pro as you normallywould - then press and thenthe soft key but do not turn theshafts at all! Next press the softkey after which the Pro will tell you "This measurement is questionable!"Ignore the note & press the soft key & then press the yellow resultskey and you will have an all zero “null” alignment!
Now start the “Move” mode bypressing the soft key. Next,observe what changes occur whenthe suction and discharge flanges arebroken. The changes you see areexactly what the pipe strain is doing tothe alignment at the coupling as youare monitoring the shaft centerlines!
You might find 2 mils (.002”) to be avery tight tolerance for pipe strain onsome applications. Some industrialplants have relaxed that to 5 mils(.005”) which might be a better startingpoint. As the people get where theyaccept the 5 mils they themselves willtighten the tolerances.
Have a Grand Day!
Norm Voelzow
Startsweep
M
© V
oelz
ow &
Com
pany
, Inc
. • W
inga
te, N
C 2
004
Pipe Strain
02/13/2004
Voelzow & Company, Inc.P. O. Box 158 • Wingate, NC 28174
Phone: 704-233-9222 • Fax: 704-233-9211E-Mail: [email protected]
Web: http://www.LaserAlignment.net/
Pip
e S
trai
n
Do Not Loosenthe Bolts Yet!
Question: Can we check Pipe Strain with our Rotalign® Pro?Answer: Yes, the Rotalign® Pro is great for checking Pipe Strain!
Pipe StrainPipe Strain
Pipe Strain
Pipe Strain
