External Chambers
Sealed or Flanged Top
Technical
Reference
Manual
T A B L E
O F
C O N T E N T S
Design Construction Comparison ...................................................................................................................................2
Dimensional Information
Head Flange Type ....................................................................................................................................................3
Probe Length ...........................................................................................................................................................3
Physical Specifications ...................................................................................................................................................4
Model Number ............................................................................................................................................................4-5
Dimensional Specifications
Slip-On Flanged Chamber Design - Commercial Construction .................................................................................6
Slip-On Flanged Chamber Design - ANSI B31.3 Construction..................................................................................7
Slip-On Flanged Chamber Design - ANSI B31.1 Construction..................................................................................7
Weldneck Flanged Chamber Design - Commercial Construction..............................................................................8
Weldneck Flanged Chamber Design - ANSI B31.3 Construction ..............................................................................9
Weldneck Flanged Chamber Design - ANSI B31.1 Construction .......................................................................10-11
Sealed Chamber Design - Commercial Construction..............................................................................................12
Sealed Chamber Design - ANSI B31.3 Construction ..............................................................................................13
Sealed Chamber Design - ANSI B31.1 Construction ..............................................................................................14
D E S I G N
C O N S T R U C T I O N
C O M P A R I S O N
Comm
B31.3
•
•
•
B31.1
•
•
NACE
•
•
•
ASME grade and NACE listed materials
Slip-on head and process flanges
Certificate of Conformance on materials
Weld neck head and slip-on process flanges
Weld neck head and process flanges
Pipe to pipe branch connections
Bonney type fittings
ASME Section IX welding procedures
Welding by ASME qualified welders per ASME Section IX procedures
Full penetration chamber branch welds
Full penetration circumferential welds
100% visual inspection of circumferential welds for full penetration
Hydrostatic test at 1.5
×
rated pressure
Certified ten minute hydrostatic test at 1.5
×
rated pressure
≤1500#
≤300#
3" 1500#
5000 psi
≥600#
•
•
•
•
•
•
≤600#
•
≥900#
≤600#
≥900#
•
≥1500#
≥600#
≥1500#
≥600#
•
•
•
CS
SS
•
•
•
•
•
•
•
•
•
Five percent radiographic examination of full penetration circumferential welds
Post weld heat treatment
Annealing, if required for hardness
Hardness testing of welds and adjacent heat affected zones
Flanged or sealed chambers
Stress limits per design code
Unless weldneck process flanges are specified in model number
Except 3" 1500# cage
Except 2" 1500# cage
2
D I M E N S I O N A L
H E A D
F L A N G E
T Y P E
I N F O R M A T I O N
Design Standard
(third digit)
Chamber Rating
(fifth digit)
150# (A)
300# (B)
Process Connection Type (seventh digit)
NPT
(A, G)
Socket Weld
(B, H)
Slip-on RF
(D, K)
Weldneck RF
(E, L)
Weldneck RTJ
(F, M)
Commercial
(1, 5)
600# (C)
900# (D)
1500# (E)
5000 psi (F)
150# (A)
300# (B)
Slip-on raised face
ASME B31.3
(4, 7)
600# (C)
900# (D)
1500# (E)
5000 psi (F)
150# (A)
300# (B)
Weldneck raised face
Slip-on raised face
*
n/a
Weldneck raised face
ASME B31.1
(3)
600# (C)
900# (D)
1500# (E)
5000 psi (F)
Weldneck raised face
n/a
*
1500# ASME B31.3 will have a slip-on head flange on 2" cage and weldneck head flange on 3" cage
P R O B E
L E N G T H
If utilizing a sealed top chamber, go to pages 13 & 14 for ‘A’ dimension.
To properly size your sensing element when mounting in a flange top chamber, it is necessary to determine the dimension from
the face of the head flange to the centerline of the upper process connection. To determine this dimension:
1. Use the third, fifth & seventh digits of your chamber model number and the above chart to verify the type of head flange on
your chamber.
2. On pages 6–12, locate the ‘A’ dimension of your chamber according to the chamber pressure rating, head flange type, design
standard, chamber size & process connection size.
3. Go to the formulas on page 4 for probe or cable lengths. Using your ‘A’ dimension and measuring range (customer
designated), determine your required probe length.
A
A
A
Measuring
Range
Measuring
Range
Measuring
Range
1" NPT drain
1" NPT drain
Sealed Chamber
Slip-on head flange
Weldneck head flange
3
P H Y S I C A L
Measuring span length
Eclipse probe length
sealed cage
flanged cage
Kotron probe length
sealed cage
S P E C I F I C A T I O N S
From 12 to 240 inches (30-610 cm)
Measuring range
+ A + 5 inches (13 cm) (rounded down to nearest inch)
Measuring range
+ A + 6 inches (15 cm) (rounded down to nearest inch)
Measuring range
+ A + 3 inches (7 cm) (rounded down to nearest inch)
flanged cage
Displacer cable length (min.)
Materials of Construction
Sensor Connections
Process Connection Sizes
Process Connection Ratings
Process Connection Types
Connection Configurations
Process Pressures
Process Temperatures
Measuring range
+ A + 4 inches (10 cm) (rounded down to nearest inch)
Measuring range
+ A + 6 inches (15 cm) (rounded up to nearest foot)
Carbon steel or 316 stainless steel
(head flange bolting ASTM A193 GrB7 regardless of chamber material)
3
⁄
4
" or 2" NPT, 2" or 3" flange from 150# to 2500# ANSI
⁄
4
", 1", 1
1
⁄
2
" or 2"
150#, 300#,600#, 900#, 1500# or 2500# ANSI
threaded, socketweld, slip-on RF flanges,
weldneck RF flanges, weldneck RTJ flanges
Side-side, side-bottom
Up to 5000 psi (345 bar)
Up to +750° F (+399° C)
3
See bulletin 57-101 for Eclipse transmitter and probe part numbers.
Measuring range is last three digits of chamber model number.
See bulletin 50-125 for Kotron probe part numbers.
See bulletin 45-115 for top mounted displacer switch part numbers and allowable high level
dimension with respect to face of mounting flange.
Must be used in 3" flanged cage.
Maximum pressure rating of cage with 2500# flanges is 5000 psi @ 100° F (345 bar @ 38° C).
M O D E L
MOUNTING
S
F
N U M B E R
Sealed external chamber (NPT sensor connection)
Flanged top external chamber
NOMINAL CHAMBER DIAMETER
2
3
3 inch
2 inch
If sealed chamber,
3
⁄
4
" NPT sensor connection
If sealed chamber, 2" NPT sensor connection
If flanged chamber, flanged sensor connection same size as chamber
If flanged chamber, flanged sensor connection same size as chamber
Displacer switches require 3" cage.
DESIGN STANDARD
1
3
4
5
7
ASME B31.3 Certified
Commercial Construction and NACE certified
ASME B31.3 Certified and NACE certified
Commercial Construction
ASME B31.1 Certified
Level switch/transmitter must also be specified to required code, if applicable.
ASME B31.1, 5000 psi chambers not available in carbon steel.
4
M O D E L
N U M B E R
C O N T I N U E D
MATERIALS OF CONSTRUCTION
1
4
Process connection materials will match chamber materials
Carbon Steel, measuring range in inches
316/316L Stainless Steel, measuring range in inches
CHAMBER RATING
11
A
B
C
D
E
F
150# ANSI class
300# ANSI class
600# ANSI class
900# ANSI class
1500# ANSI class
5000 psi (process flanges will be 2500# ANSI)
1
1
Process flange, if applicable, will match chamber rating, except as indicated
PROCESS CONNECTION SIZE
1
2
3
4
⁄
4
"
1"
1
1 ⁄
2
"
2"
3
PROCESS CONNECTION TYPE AND CONFIGURATION
12
A
B
D
E
F
G
H
K
L
M
Side/Side Configurations
NPT
SW
Slip-on RF Flange
14
Weldneck RF Flange
Head Flange Type
Slip-on or weldneck
13
Weldneck
Chamber rating codes A, B & C only
Weldneck RJ Flange
Chamber rating codes C, D, E & F only
Side/Bottom Configurations
NPT
SW
Slip-on RF Flange
14
Weldneck RF Flange
Weldneck RJ Flange
12
13
14
Slip-on or weldneck
13
Chamber rating codes A, B & C only
Chamber rating codes C, D, E & F only
Weldneck
Process connection materials will match chamber materials
See page 3 to determine type of head flange
Cannot use slip-on flanges on 2" or 3", 5000 psi for B31.3, nor on 2" or 3",
≥600#
for B31.1
MEASURING RANGE
12 to 240 inches
Example: 12 inches = 012
5
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