Guardian piping products
Guardian Flanges
Browse Guardian raised-face flange types in 304 stainless steel, 316 stainless steel, and ASTM A105 carbon steel. Select Class 150 or Class 300, review the supplied Class 150 dimensions, and add multiple sizes to one request for quote.
Raised-face socket-weld flange
Socket-Weld Flange
Socket-weld flange for small-bore piping and applications requiring a recessed pipe socket before fillet welding.
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Flange typeSocket weld, raised face
Available classesClass 150 and Class 300
Available materials304 stainless, 316 stainless, or A105 carbon steel
Stainless material standardASTM A182
Carbon steel material standardASTM A105
Source size range1/2 inch through 12 inches
Displayed dimensionsClass 150 only; confirm Class 300 dimensions before order
Class 150 Socket-Weld Flange Drawing and Dimensions
Dimensions in inches - Class 150 source drawing
Sizes, SKUs and Class 150 dimensions
Scroll table horizontally on smaller screens
Size
304 SKU
316 SKU
CS SKU
A Outside dia.
B Inside dia.
C Thickness
D Height
E Socket dia.
F Hub dia.
G Raised face
H Holes
I Hole dia.
Recommended bolt
J Bolt circle
K Socket depth
Add to quote
1/2"
FLS41RFSW012
FLS61RFSW012
FLCS1RFSW012
3.50
0.62
0.50
0.68
0.88
1.19
1.38
4
0.63
1/2 x 2
2.38
0.38
3/4"
FLS41RFSW034
FLS61RFSW034
FLCS1RFSW034
3.88
0.82
0.56
0.68
1.09
1.50
1.69
4
0.63
1/2 x 2-1/4
2.75
0.44
1"
FLS41RFSW100
FLS61RFSW100
FLCS1RFSW010
4.25
1.05
0.62
0.75
1.36
1.94
2.00
4
0.63
1/2 x 2-1/4
3.12
0.50
1-1/4"
FLS41RFSW114
FLS61RFSW114
FLCS1RFSW114
4.62
1.38
0.68
0.87
1.70
2.31
2.50
4
0.63
1/2 x 2-1/4
3.50
0.56
1-1/2"
FLS41RFSW112
FLS61RFSW112
FLCS1RFSW112
5.00
1.61
0.75
0.94
1.95
2.56
2.88
4
0.63
1/2 x 2-1/2
3.88
0.62
2"
FLS41RFSW200
FLS61RFSW200
FLCS1RFSW200
6.00
2.07
0.81
1.06
2.44
3.06
3.62
4
0.75
5/8 x 2-3/4
4.75
0.69
2-1/2"
FLS41RFSW212
FLS61RFSW212
FLCS1RFSW212
7.00
2.47
0.94
1.18
2.94
3.56
4.12
4
0.75
5/8 x 3
5.50
0.75
3"
FLS41RFSW300
FLS61RFSW300
FLCS1RFSW300
7.50
3.07
1.00
1.25
3.57
4.25
5.00
4
0.75
5/8 x 3
6.00
0.81
3-1/2"
Contact for SKU
Contact for SKU
Contact for SKU
8.50
3.55
1.00
1.31
4.07
4.81
5.50
8
0.75
5/8 x 3
7.00
0.88
4"
FLS41RFSW400
FLS61RFSW400
FLCS1RFSW400
9.00
4.03
1.00
1.37
4.57
5.31
6.19
8
0.75
5/8 x 3
7.50
0.94
5"
FLS41RFSW500
FLS61RFSW500
FLCS1RFSW500
10.00
5.05
1.00
1.50
5.66
6.44
7.31
8
0.87
3/4 x 3-1/4
8.50
0.94
6"
FLS41RFSW600
FLS61RFSW600
FLCS1RFSW600
11.00
6.07
1.06
1.62
6.72
7.56
8.50
8
0.87
3/4 x 3-1/4
9.50
1.06
8"
Contact for SKU
Contact for SKU
FLCS1RFSW800
13.50
7.98
1.18
1.81
8.72
9.69
10.62
8
0.87
3/4 x 3-1/2
11.75
1.25
10"
Contact for SKU
Contact for SKU
FL1RSW10
16.00
10.02
1.25
2.00
10.87
12.00
12.75
12
0.99
7/8 x 3-3/4
14.25
1.31
12"
Contact for SKU
Contact for SKU
FL1RSW12
19.00
12.00
1.31
2.25
12.87
14.38
15.00
12
0.99
7/8 x 4
17.00
1.56
Raised-face butt-weld flange
Weld-Neck Flange
Long tapered hub transfers stress into the pipe and provides a butt-weld connection for demanding piping service.
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Flange typeWeld neck, raised face
Available classesClass 150 and Class 300
Available materials304 stainless, 316 stainless, or A105 carbon steel
Stainless material standardASTM A182
Carbon steel material standardASTM A105
Source size range1/2 inch through 12 inches
Displayed dimensionsClass 150 only; confirm Class 300 dimensions before order
Class 150 Weld-Neck Flange Drawing and Dimensions
Dimensions in inches - Class 150 source drawing
Sizes, SKUs and Class 150 dimensions
Scroll table horizontally on smaller screens
Size
304 SKU
316 SKU
CS SKU
A Outside dia.
B Inside dia.
C Thickness
D Height
E Weld dia.
F Hub dia.
G Raised face
H Holes
I Hole dia.
Recommended bolt
J Bolt circle
Add to quote
1/2"
FLS41RFWN012
FLS61RFWN012
FLCS1RFWN012
3.50
0.62
0.44
1.88
0.84
1.19
1.38
4
0.63
1/2 x 2
2.38
3/4"
FLS41RFWN034
FLS61RFWN034
FLCS1RFWN034
3.88
0.82
0.50
2.06
1.05
1.50
1.69
4
0.63
1/2 x 2-1/4
2.75
1"
FLS41RFWN100
FLS61RFWN100
FLCS1RFWN010
4.25
1.05
0.56
2.19
1.32
1.94
2.00
4
0.63
1/2 x 2-1/4
3.12
1-1/4"
FLS41RFWN114
FLS61RFWN114
FLCS1RFWN114
4.62
1.38
0.62
2.25
1.66
2.31
2.50
4
0.63
1/2 x 2-1/4
3.50
1-1/2"
FLS41RFWN112
FLS61RFWN112
FLCS1RFWN112
5.00
1.61
0.69
2.44
1.90
2.56
2.88
4
0.63
1/2 x 2-1/2
3.88
2"
FLS41RFWN200
FLS61RFWN200
FLCS1RFWN200
6.00
2.07
0.75
2.50
2.38
3.06
3.62
4
0.75
5/8 x 2-3/4
4.75
2-1/2"
FLS41RFWN212
FLS61RFWN212
FLCS1RFWN212
7.00
2.47
0.88
2.75
2.88
3.56
4.12
4
0.75
5/8 x 3
5.50
3"
FLS41RFWN300
FLS61RFWN300
FLCS1RFWN300
7.50
3.07
0.94
2.75
3.50
4.25
5.00
4
0.75
5/8 x 3
6.00
3-1/2"
Contact for SKU
Contact for SKU
FLCS1RFWN350
8.50
3.55
0.94
2.81
4.00
4.81
5.50
8
0.75
5/8 x 3
7.00
4"
FLS41RFWN400
FLS61RFWN400
FLCS1RFWN400
9.00
4.03
0.94
3.00
4.50
5.31
6.19
8
0.75
5/8 x 3
7.50
5"
FLS41RFWN500
FLS61RFWN500
FLCS1RFWN500
10.00
5.05
0.94
3.50
5.56
6.44
7.31
8
0.87
3/4 x 3-1/4
8.50
6"
FLS41RFWN600
FLS61RFWN600
FLCS1RFWN600
11.00
6.07
1.00
3.50
6.63
7.56
8.50
8
0.87
3/4 x 3-1/4
9.50
8"
Contact for SKU
Contact for SKU
FLCS1RFWN800
13.50
7.98
1.12
4.00
8.63
9.69
10.62
8
0.87
3/4 x 3-1/2
11.75
10"
Contact for SKU
Contact for SKU
FL1RWN10
16.00
10.02
1.19
4.00
10.75
12.00
12.75
12
0.99
7/8 x 3-3/4
14.25
12"
Contact for SKU
Contact for SKU
FL1RWN12
19.00
12.00
1.25
4.50
12.75
14.38
15.00
12
0.99
7/8 x 4
17.00
14"
Contact for SKU
Contact for SKU
FL1RWN14
16"
Contact for SKU
Contact for SKU
FL1RWN16
18"
Contact for SKU
Contact for SKU
FL1RWN18
20"
Contact for SKU
Contact for SKU
FL1RWN20
24"
Contact for SKU
Contact for SKU
FL1RWN24
Raised-face threaded flange
Threaded Flange
Threaded flange provides a mechanical pipe connection where field welding is not preferred or practical.
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Flange typeThreaded, raised face
Available classesClass 150 and Class 300
Available materials304 stainless, 316 stainless, or A105 carbon steel
Stainless material standardASTM A182
Carbon steel material standardASTM A105
Source size range1/2 inch through 12 inches
Displayed dimensionsClass 150 only; confirm Class 300 dimensions before order
Class 150 Threaded Flange Drawing and Dimensions
Dimensions in inches - Class 150 source drawing
Sizes, SKUs and Class 150 dimensions
Scroll table horizontally on smaller screens
Size
304 SKU
316 SKU
CS SKU
A Outside dia.
C Thickness
D Height
Thread length
F Hub dia.
G Raised face
H Holes
I Hole dia.
Recommended bolt
J Bolt circle
Add to quote
1/2"
FLS41RFTHD012
FLS61RFTHD012
FLCS1RFTHD012
3.50
0.50
0.62
0.62
1.19
1.38
4
0.63
1/2 x 2
2.38
3/4"
FLS41RFTHD034
FLS61RFTHD034
FLCS1RFTHD034
3.88
0.56
0.62
0.62
1.50
1.69
4
0.63
1/2 x 2-1/4
2.75
1"
FLS41RFTHD100
FLS61RFTHD100
FLCS1RFTHD010
4.25
0.62
0.69
0.69
1.94
2.00
4
0.63
1/2 x 2-1/4
3.12
1-1/4"
FLS41RFTHD114
FLS61RFTHD114
FLCS1RFTHD114
4.62
0.68
0.81
0.81
2.31
2.50
4
0.63
1/2 x 2-1/4
3.50
1-1/2"
FLS41RFTHD112
FLS61RFTHD112
FLCS1RFTHD112
5.00
0.75
0.88
0.88
2.56
2.88
4
0.63
1/2 x 2-1/2
3.88
2"
FLS41RFTHD200
FLS61RFTHD200
FLCS1RFTHD200
6.00
0.81
1.00
1.00
3.06
3.62
4
0.75
5/8 x 2-3/4
4.75
2-1/2"
FLS41RFTHD212
FLS61RFTHD212
FLCS1RFTHD212
7.00
0.94
1.12
1.12
3.56
4.12
4
0.75
5/8 x 3
5.50
3"
FLS41RFTHD300
FLS61RFTHD300
FLCS1RFTHD300
7.50
1.00
1.19
1.19
4.25
5.00
4
0.75
5/8 x 3
6.00
3-1/2"
Contact for SKU
Contact for SKU
FLCS1RFTHD350
8.50
1.00
1.25
1.25
4.81
5.50
8
0.75
5/8 x 3
7.00
4"
FLS41RFTHD400
FLS61RFTHD400
FLCS1RFTHD400
9.00
1.00
1.31
1.31
5.31
6.19
8
0.75
5/8 x 3
7.50
5"
FLS41RFTHD500
FLS61RFTHD500
FLCS1RFTHD500
10.00
1.00
1.44
1.44
6.44
7.31
8
0.87
3/4 x 3-1/4
8.50
6"
FLS41RFTHD600
FLS61RFTHD600
FLCS1RFTHD600
11.00
1.06
1.56
1.56
7.56
8.50
8
0.87
3/4 x 3-1/4
9.50
8"
Contact for SKU
Contact for SKU
FLCS1RFTHD800
13.50
1.18
1.75
1.75
9.69
10.62
8
0.87
3/4 x 3-1/2
11.75
10"
Contact for SKU
Contact for SKU
FL1RT10
16.00
1.25
1.94
1.94
12.00
12.75
12
0.99
7/8 x 3-3/4
14.25
12"
Contact for SKU
Contact for SKU
FL1RT12
19.00
1.31
2.19
2.19
14.38
15.00
12
0.99
7/8 x 4
17.00
Raised-face blind flange
Blind Flange
Solid flange used to close a piping end, nozzle, or flanged opening while retaining bolted access for future service.
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Flange typeBlind, raised face
Available classesClass 150 and Class 300
Available materials304 stainless, 316 stainless, or A105 carbon steel
Stainless material standardASTM A182
Carbon steel material standardASTM A105
Source size range1/2 inch through 12 inches
Displayed dimensionsClass 150 only; confirm Class 300 dimensions before order
Class 150 Blind Flange Drawing and Dimensions
Dimensions in inches - Class 150 source drawing
Sizes, SKUs and Class 150 dimensions
Scroll table horizontally on smaller screens
Size
304 SKU
316 SKU
CS SKU
A Outside dia.
C Thickness
G Raised face
H Holes
I Hole dia.
Recommended bolt
J Bolt circle
Add to quote
1/2"
FLS41RFBL012
FLS61RFBL012
FLCS1RFBL012
3.50
0.44
1.38
4
0.63
1/2 x 2
2.38
3/4"
FLS41RFBL034
FLS61RFBL034
FLCS1RFBL034
3.88
0.50
1.69
4
0.63
1/2 x 2-1/4
2.75
1"
FLS41RFBL100
FLS61RFBL100
FLCS1RFBL010
4.25
0.56
2.00
4
0.63
1/2 x 2-1/4
3.12
1-1/4"
FLS41RFBL114
FLS61RFBL114
FLCS1RFBL114
4.62
0.62
2.50
4
0.63
1/2 x 2-1/4
3.50
1-1/2"
FLS41RFBL112
FLS61RFBL112
FLCS1RFBL112
5.00
0.69
2.88
4
0.63
1/2 x 2-1/2
3.88
2"
FLS41RFBL200
FLS61RFBL200
FLCS1RFBL200
6.00
0.75
3.62
4
0.75
5/8 x 2-3/4
4.75
2-1/2"
FLS41RFBL212
FLS61RFBL212
FLCS1RFBL212
7.00
0.88
4.12
4
0.75
5/8 x 3
5.50
3"
FLS41RFBL300
FLS61RFBL300
FLCS1RFBL300
7.50
0.94
5.00
4
0.75
5/8 x 3
6.00
3-1/2"
Contact for SKU
Contact for SKU
FLCS1RFBL350
8.50
0.94
5.50
8
0.75
5/8 x 3
7.00
4"
FLS41RFBL400
FLS61RFBL400
FLCS1RFBL400
9.00
0.94
6.19
8
0.75
5/8 x 3
7.50
5"
FLS41RFBL500
FLS61RFBL500
FLCS1RFBL500
10.00
0.94
7.31
8
0.87
3/4 x 3-1/4
8.50
6"
FLS41RFBL600
FLS61RFBL600
FLCS1RFBL600
11.00
1.00
8.50
8
0.87
3/4 x 3-1/4
9.50
8"
FLS41RFBL800
FLS61RFBL800
FLCS1RFBL800
13.50
1.12
10.62
8
0.87
3/4 x 3-1/2
11.75
10"
Contact for SKU
FLS61RFBL1000
FLCS1RFBL1000
16.00
1.19
12.75
12
0.99
7/8 x 3-3/4
14.25
12"
Contact for SKU
Contact for SKU
FL1RB12
19.00
1.25
15.00
12
0.99
7/8 x 4
17.00
14"
Contact for SKU
Contact for SKU
FL1RB14
16"
Contact for SKU
Contact for SKU
FL1RB16
18"
Contact for SKU
Contact for SKU
FL1RB18
20"
Contact for SKU
Contact for SKU
FL1RB20
24"
Contact for SKU
Contact for SKU
FL1RB24
Raised-face slip-on flange
Slip-On Flange
Slip-on flange slides over the pipe and is secured with inside and outside fillet welds for straightforward fit-up.
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Flange typeSlip on, raised face
Available classesClass 150 and Class 300
Available materials304 stainless, 316 stainless, or A105 carbon steel
Stainless material standardASTM A182
Carbon steel material standardASTM A105
Source size range1/2 inch through 12 inches
Displayed dimensionsClass 150 only; confirm Class 300 dimensions before order
Class 150 Slip-On Flange Drawing and Dimensions
Dimensions in inches - Class 150 source drawing
Sizes, SKUs and Class 150 dimensions
Scroll table horizontally on smaller screens
Size
304 SKU
316 SKU
CS SKU
A Outside dia.
B Inside dia.
C Thickness
D Height
F Hub dia.
G Raised face
H Holes
I Hole dia.
Recommended bolt
J Bolt circle
Add to quote
1/2"
FLS41RFSO012
FLS61RFSO012
FLCS1RFSO012
3.50
0.88
0.50
0.62
1.19
1.38
4
0.63
1/2 x 2
2.38
3/4"
FLS41RFSO034
FLS61RFSO034
FLCS1RFSO034
3.88
1.09
0.56
0.62
1.50
1.69
4
0.63
1/2 x 2-1/4
2.75
1"
FLS41RFSO100
FLS61RFSO100
FLCS1RFSO010
4.25
1.36
0.62
0.69
1.94
2.00
4
0.63
1/2 x 2-1/4
3.12
1-1/4"
FLS41RFSO114
FLS61RFSO114
FLCS1RFSO114
4.62
1.70
0.68
0.81
2.31
2.50
4
0.63
1/2 x 2-1/4
3.50
1-1/2"
FLS41RFSO112
FLS61RFSO112
FLCS1RFSO112
5.00
1.95
0.75
0.88
2.56
2.88
4
0.63
1/2 x 2-1/2
3.88
2"
FLS41RFSO200
FLS61RFSO200
FLCS1RFSO200
6.00
2.44
0.81
1.00
3.06
3.62
4
0.75
5/8 x 2-3/4
4.75
2-1/2"
FLS41RFSO212
FLS61RFSO212
FLCS1RFSO212
7.00
2.94
0.94
1.12
3.56
4.12
4
0.75
5/8 x 3
5.50
3"
FLS41RFSO300
FLS61RFSO300
FLCS1RFSO300
7.50
3.57
1.00
1.19
4.25
5.00
4
0.75
5/8 x 3
6.00
3-1/2"
Contact for SKU
Contact for SKU
FLCS1RFSO350
8.50
4.07
1.00
1.25
4.81
5.50
8
0.75
5/8 x 3
7.00
4"
FLS41RFSO400
FLS61RFSO400
FLCS1RFSO400
9.00
4.57
1.00
1.31
5.31
6.19
8
0.75
5/8 x 3
7.50
5"
FLS41RFSO500
FLS61RFSO500
FLCS1RFSO500
10.00
5.66
1.00
1.44
6.44
7.31
8
0.87
3/4 x 3-1/4
8.50
6"
FLS41RFSO600
FLS61RFSO600
FLCS1RFSO600
11.00
6.72
1.06
1.56
7.56
8.50
8
0.87
3/4 x 3-1/4
9.50
8"
FLS41RFSO800
FLS61RFSO800
FLCS1RFSO800
13.50
8.72
1.18
1.75
9.69
10.62
8
0.87
3/4 x 3-1/2
11.75
10"
Contact for SKU
FLS61RFSO1000
FLCS1RFSO1000
16.00
10.88
1.25
1.94
12.00
12.75
12
0.99
7/8 x 3-3/4
14.25
12"
Contact for SKU
FLS61RFSO1200
FL1RSO12
19.00
12.88
1.31
2.19
14.38
15.00
12
0.99
7/8 x 4
17.00
14"
Contact for SKU
Contact for SKU
FL1RSO14
16"
Contact for SKU
Contact for SKU
FL1RSO16
18"
Contact for SKU
Contact for SKU
FL1RSO18
20"
Contact for SKU
Contact for SKU
FL1RSO20
24"
Contact for SKU
Contact for SKU
FL1RSO24
Lap-joint backing flange
Lap-Joint Flange
Loose backing flange used with a stub end, allowing bolt-hole rotation during alignment and reducing alloy content in selected assemblies.
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Flange typeLap joint
Available classesClass 150 and Class 300
Available materials304 stainless, 316 stainless, or A105 carbon steel
Stainless material standardASTM A182
Carbon steel material standardASTM A105
Source size range1/2 inch through 12 inches
Displayed dimensionsClass 150 only; confirm Class 300 dimensions before order
Class 150 Lap-Joint Flange Drawing and Dimensions
Dimensions in inches - Class 150 source drawing
Sizes, SKUs and Class 150 dimensions
Scroll table horizontally on smaller screens
Size
304 SKU
316 SKU
CS SKU
A Outside dia.
B Inside dia.
C Thickness
D Height
F Hub dia.
R Radius
H Holes
I Hole dia.
Recommended bolt
J Bolt circle
Add to quote
1/2"
FLS41RFLJ012
FLS61RFLJ012
FLCS1RFLJ012
3.50
0.89
0.44
0.62
1.19
0.12
4
0.63
1/2 x 2
2.38
3/4"
FLS41RFLJ034
FLS61RFLJ034
FLCS1RFLJ034
3.88
1.10
0.50
0.62
1.50
0.12
4
0.63
1/2 x 2-1/4
2.75
1"
FLS41RFLJ100
FLS61RFLJ100
FLCS1RFLJ010
4.25
1.37
0.56
0.69
1.94
0.12
4
0.63
1/2 x 2-1/4
3.12
1-1/4"
FLS41RFLJ114
FLS61RFLJ114
FLCS1RFLJ114
4.62
1.71
0.62
0.81
2.31
0.19
4
0.63
1/2 x 2-1/4
3.50
1-1/2"
FLS41RFLJ112
FLS61RFLJ112
FLCS1RFLJ112
5.00
1.95
0.69
0.88
2.56
0.25
4
0.63
1/2 x 2-1/2
3.88
2"
FLS41RFLJ200
FLS61RFLJ200
FLCS1RFLJ200
6.00
2.45
0.75
1.00
3.06
0.31
4
0.75
5/8 x 2-3/4
4.75
2-1/2"
FLS41RFLJ212
FLS61RFLJ212
FLCS1RFLJ212
7.00
2.96
0.88
1.12
3.56
0.31
4
0.75
5/8 x 3
5.50
3"
FLS41RFLJ300
FLS61RFLJ300
FLCS1RFLJ300
7.50
3.58
0.94
1.19
4.25
0.38
4
0.75
5/8 x 3
6.00
3-1/2"
Contact for SKU
Contact for SKU
FLCS1RFLJ350
8.50
4.09
0.94
1.25
4.81
0.38
8
0.75
5/8 x 3
7.00
4"
FLS41RFLJ400
FLS61RFLJ400
FLCS1RFLJ400
9.00
4.59
0.94
1.31
5.31
0.44
8
0.75
5/8 x 3
7.50
5"
FLS41RFLJ500
FLS61RFLJ500
FLCS1RFLJ500
10.00
5.68
0.94
1.44
6.44
0.50
8
0.87
3/4 x 3-1/4
8.50
6"
FLS41RFLJ600
FLS61RFLJ600
FLCS1RFLJ600
11.00
6.74
1.00
1.56
7.56
0.50
8
0.87
3/4 x 3-1/4
9.50
8"
FLS41RFLJ800
Contact for SKU
FLCS1RFLJ800
13.50
8.74
1.12
1.75
9.69
0.50
8
0.87
3/4 x 3-1/2
11.75
10"
Contact for SKU
Contact for SKU
FL1RLJ10
16.00
10.90
1.19
1.94
12.00
0.50
12
0.99
7/8 x 3-3/4
14.25
12"
Contact for SKU
Contact for SKU
FL1RLJ12
19.00
12.90
1.25
2.19
14.38
0.50
12
0.99
7/8 x 4
17.00
14"
Contact for SKU
Contact for SKU
FL1RLJ14
16"
Contact for SKU
Contact for SKU
FL1RLJ16
18"
Contact for SKU
Contact for SKU
FL1RLJ18
20"
Contact for SKU
Contact for SKU
FL1RLJ20
24"
Contact for SKU
Contact for SKU
FL1RLJ24
Specification sheet
