Lab Report - Basic
Customer: ABC Company
Location: Anytown, USA
Application/Process: Unit #3 Baghouse
Reason for Investigation: In-service Evaluation
Contact Person: John and Jane Doe
E-Mail: [email protected] and [email protected]
Date: 7/12/19
BWF America, Inc.
1800 Worldwide Blvd.
Hebron, KY 41048
T +1 800 733 2043
F +1 859 282 4555
www.bwf-envirotec.com
LA-No.: 19-1000
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 3
Summary
Overview Samples
Conclusions
Basic Information
customer ABC Company (Anytown, USA)
reason for investigation In-service Evaluation
SAP no. 2058
application | process Unit #3 Baghouse
dust collector ID Boiler
dust collector OEM Hamon Research Cottrell
no. of bags 980 bags per 12 compartments 11,760 total
previous investigation #18-1233 and #17-1456
analyzed by D. Cornelius
no. bag ID supplier material service life
1 Compartment #1-R5, B3 BWF PPS/PPS 604 MPS CS31 Installed April 2017
2 Compartment #3 R17, B20 BWF PPS/PPS 604 MPS CS31 Installed April 2017
3
4
5
6
7
8
Both filter bags had areas of hardened agglomerated dust throughout the entire length of the bag on the exterior
side. The interior side of both bags was relatively free of dust with rust marks on the cage wire impressions and
loose rust. All issues indicate excess moisture was present in the process.
John Smith 859-282-4550 [email protected]
Sales Person Phone Email
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 4
Basic Information
type
application
place of sampling
form of dust
bulk density (g/cm3)
pH-value
Tendency to
agglomerate
Dust Characteristics
Comments
Electrostatic Chargeability
rod
flask
(of watery solution)
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 5
Particle Size Analysis
Cumulative Line
Differential Distribution
Solvent: Water
Median : The size of particle where the cumulative line crosses the 50th percentile.
Modal :The size of particle that is most often seen.
Mean Value : The average size of the particles.Std Dev ( Standard Deviation ) : The amount of variance, in microns, between each trial. Cum Q3 ( % ) = Cumulative % : The percent of particles below that micron size.Diff q3 ( % ) = Differential Distribution : The percent of particles at that micron size.
19-1000
12/7/19 14:28:09
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 6
Particle Size Analysis
Cumulative Line
Differential Distribution
Solvent: Water
Median : The size of particle where the cumulative line crosses the 50th percentile.
Modal :The size of particle that is most often seen.
Mean Value : The average size of the particles.Std Dev ( Standard Deviation ) : The amount of variance, in microns, between each trial. Cum Q3 ( % ) = Cumulative % : The percent of particles below that micron size.Diff q3 ( % ) = Differential Distribution : The percent of particles at that micron size.
19-1000
12/7/19 14:28:09
Dust Sample
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 7
Basic Information
part no. 241-011-01
supplier BWF
service life Installed April 2017 - 2 Years
description PPS/PPS 604 MPS CS31, a 17.7 oz/yd2 scrim-supported, glazed PPS felt with
MPS (micro-pore-size) high efficiency fibers and Code 31 bath treatment.
Visual Impression / Physical Damage
Filter Bag Results
There was no physical damage present on this filter bag. However, there were areas of hardened
agglomerated dust throughout the length of the bag on the exterior side and rust marks on the cage wire
impressions and loose rust on the interior side.
Area Weight, Air Permeability
There was an 8% increase in weight of the top section after air pulse cleaning verses original specification
(17.7 oz/yd2).
The permeability of the top section after air pulse cleaning was 12.55 cfm, representing a 16% loss in
permeability verses original specification (15 cfm).
Strength Analysis
The Mullen Burst strength of the top section was 800 psi, representing no loss in strength versus original
specification (600 psi).
Tensile Strength
Attack
chemical Not evident.
hydrolytic Not relevant for PPS fibers.
Sample No. 1
Dimension & Details
length 315-1/2” bag design top loader
wide flat 7-13/16” tubesheet hole 3.062” x 6.625” oval
surface finish glazed cuff 2-3/4”
treatment cs31 bath treatment seam
scrim multifilament wear strip 5-3/4”
sewing thread disc design double oval
(first bottom seam to
top of snap ring)
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 8
MeasurementsMeasurements
22.1
19.2817.7
0
5
10
15
20
25
top middle bottom original
Are
a W
eigh
t [o
z./y
d2]
Area Weight
as received pulse jet cleaned original
7.63
12.5515
25
0
5
10
15
20
25
30
top middle bottom original min original max
Air
Per
m.[
cfm
] at
∆P
= ½
” w
ater
gau
ge
Air Permeability
as received pulse jet cleaned original
Sample No. 1
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 9
MeasurementsMeasurements
800
600
0
200
400
600
800
1000
top middle bottom original
Mu
llen
Bu
rst
(psi
)
Mullen Burst
psi original
Sample No. 1
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 10
MeasurementsMeasurements
0
1
length (vert.) cross (horz.)
Elo
nga
tio
n a
t B
reak
[%
]
Elongation at Break
% percentage original
0
200
length (vert.) cross (horz.)
Ten
sile
Str
engt
h [
lbf]
Tensile Strength
lbf original
Sample No. 1
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 11
Bottom Section Clean Sample
Dust Penetration
Top Section Middle Section
Photographs
Dust Side
Clean Gas Side Magnification: 25X
Dust Side
Clean Gas Side Magnification: 25X
Dust Side
Clean Gas Side Magnification: 25X
Dust Side
Clean Gas Side Magnification: 25X
Sample No. 1
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 12
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Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 13
Basic Information
part no. 241-011-01
supplier BWF
service life Installed April 2017 - 2 Years
description PPS/PPS 604 MPS CS31, a 17.7 oz/yd2 scrim-supported, glazed PPS felt with
MPS (micro-pore-size) high efficiency fibers and Code 31 bath treatment.
Visual Impression / Physical Damage
Filter Bag Results
There was no physical damage present on this filter bag. However, there were areas of hardened
agglomerated dust throughout the length of the bag on the exterior side and rust marks on the cage wire
impressions and loose rust on the interior side.
Area Weight, Air Permeability
There was a 13% increase in weight of the top section after air pulse cleaning verses original specification
(17.7 oz/yd2).
The permeability of the top section after air pulse cleaning was 15.94 cfm, representing no loss in permeability
verses original specification (15 cfm).
Strength Analysis
The Mullen Burst strength of the top section was 900 psi, representing no loss in strength versus original
specification (600 psi).
Tensile Strength
Attack
chemical Not evident.
hydrolytic Not relevant for PPS fibers.
Sample No. 2
Dimension & Details
length 315-1/2” bag design top loader
wide flat 7-13/16” tubesheet hole 3.062” x 6.625” oval
surface finish glazed cuff 2-3/4”
treatment cs31 bath treatment seam
scrim multifilament wear strip 5-3/4”
sewing thread disc design double oval
(first bottom seam to
top of snap ring)
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 14
MeasurementsMeasurements
20.11 19.98
17.7
0
5
10
15
20
25
top middle bottom original
Are
a W
eigh
t [o
z./y
d2]
Area Weight
as received pulse jet cleaned original
9.17
15.94 15
25
0
5
10
15
20
25
30
top middle bottom original min original max
Air
Per
m.[
cfm
] at
∆P
= ½
” w
ater
gau
ge
Air Permeability
as received pulse jet cleaned original
Sample No. 2
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 15
MeasurementsMeasurements
900
600
0
200
400
600
800
1000
top middle bottom original
Mu
llen
Bu
rst
(psi
)
Mullen Burst
psi original
Sample No. 2
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 16
MeasurementsMeasurements
0
1
length (vert.) cross (horz.)
Elo
nga
tio
n a
t B
reak
[%
]
Elongation at Break
% percentage original
0
200
length (vert.) cross (horz.)
Ten
sile
Str
engt
h [
lbf]
Tensile Strength
lbf original
Sample No. 2
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 17
Bottom Section Clean Sample
Dust Penetration
Top Section Middle Section
Photographs
Dust Side
Clean Gas Side Magnification: 25X
Dust Side
Clean Gas Side Magnification: 25X
Dust Side
Clean Gas Side Magnification: 25X
Dust Side
Clean Gas Side Magnification: 32X
Sample No. 2
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 18
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Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 19
Image Description
Additional
Image Description
Photographs
Photograph #1:
Dust Side view of Sample #1 as received
for analysis. This photograph is also
representative of Sample #2.
Dust Side Sample #1
Photograph #2:
Dust Side view of Sample #1 showing
hardened agglomerated dust on the lap
seam of the filter bag. Areas of hardened
agglomerated dust were evident the entire
length of the bag and indicate excess
moisture in the process. This photograph is
also representative of Sample #2.
Hardened
Agglomerated
Dust
Sample #1Dust Side
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 20
Additional
Image Description
Photographs
Clean Gas Side Sample #1
Loose Rust
Rust Marks
Photograph #3:
Clean Gas Side view of Sample #1 showing
loose rust and rust marks on the cage wire
impressions at the bottom of the filter bag.
Both indicate corrosion of the supporting
metal cage. This photograph is also
representative of Sample #2.
Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 21
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Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 22
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Basic Investigation | LA-No.: 19-1000BWF Envirotec, USA Page 23
● indicates what is included
○ included only if failure or issue is discovered
● included only if customer supplies
Lab Analysis Packages
basic standard advanced
comprehensive report ● ● ●
sketch for manufacturing (test in cell plate) ● ● ●
fabric identification (surface finish, fabric material, fabric weight) ● ● ●
area weight/air permeability – as received & cleaned (top) ● ● ●
area weight/air permeability – as received & cleaned (mid) ● ●
area weight/air permeability – as received & cleaned (btm) ●
mullen burst (top) ● ● ●
mullen burst (mid) ● ●
mullen burst (btm) ●
flex test – fiberglass only – warp & fill direction (mid) ● ●
tensile strength – warp & fill direction (mid) ●
dust particle size (from bag) ● ●
dust particle size (from sample) ●
agglomeration ●
static dust charge ●
bulk density ●
dust pH ●
Lab Testing
basic standard advanced
as received ● ● ●
top cuff - comment ○ ○
top cuff - picture ○
bottom disc ○ ○
inside overview ○ ○
inside cage impressions ○ ○
seam ○
stitching - comment ●
membrane under microscope ● ●
failure/concern areas - comment ○ ● ●
failure/concern areas - investigated ● ●
fabric cross section / dust penetration (top) ● ● ●
fabric cross section / dust penetration (mid) ● ●
fabric cross section / dust penetration (btm) ●
Filter Pictures
BWF America, Inc.
1800 Worldwide Blvd.
Hebron, KY 41048
T +1 800 733 2043
F +1 859 282 4555
www.bwf-envirotec.com
