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Spectacle Blind · Class 2500 Family: Spectacle BlindsReference: Spectacle blind · Class 2500Standard: ASME B16.48
Dimensions according to ASME B16.48-2020. All dimensional values are in mm . DN and NPS are nominal designations; NPS retains its inch designation.
RF · Female RTJ · Male RTJ
RF · For raised face flanges Dimensioned drawing Click the drawing to enlarge. B: inside diameter · O: outside diameter · A: centre-to-centre distance · t: thickness · W: bridge width.
The clearance hole, where required, shall have the same diameter as the flange bolt hole and shall not interfere with the bolts. Bridge thickness Wt is determined in accordance with Section 4.1 of the standard. The raised face shown is optional; see Section 4.3.1.
Class 2500 · RF Dimensions in mm. DN / NPS nominal sizes in bold.
DN NPS B · Bore Ø O · Outside Ø A · Centre to centre t · Thickness W · Bridge 15 1/2″ 16 67 90 9,7 38 20 3/4″ 21 73 95 9,7 41 25 1″ 27 83 110 9,7 64 32 1 1/4″ 35 102 130 12,7 64 40 1 1/2″ 41 114 145 15,7 70 50 2″ 53 143 170 15,7 70 65 2 1/2″ 63 165 195 19,1 76 80 3″ 78 194 230 22,4 76 100 4″ 102 232 275 28,4 89 125 5″ 128 276 325 35,1 89 150 6″ 154 314 370 41,1 89 200 8″ 198 384 440 53,8 102 250 10″ 248 473 540 66,5 114 300 12″ 289 546 620 79,2 114
DN 15 · NPS 1/2″ DN 15
NPS 1/2″
B · Bore Ø 16
O · Outside Ø 67
A · Centre to centre 90
t · Thickness 9,7
W · Bridge 38
DN 20 · NPS 3/4″ DN 20
NPS 3/4″
B · Bore Ø 21
O · Outside Ø 73
A · Centre to centre 95
t · Thickness 9,7
W · Bridge 41
DN 25 · NPS 1″ DN 25
NPS 1″
B · Bore Ø 27
O · Outside Ø 83
A · Centre to centre 110
t · Thickness 9,7
W · Bridge 64
DN 32 · NPS 1 1/4″ DN 32
NPS 1 1/4″
B · Bore Ø 35
O · Outside Ø 102
A · Centre to centre 130
t · Thickness 12,7
W · Bridge 64
DN 40 · NPS 1 1/2″ DN 40
NPS 1 1/2″
B · Bore Ø 41
O · Outside Ø 114
A · Centre to centre 145
t · Thickness 15,7
W · Bridge 70
DN 50 · NPS 2″ DN 50
NPS 2″
B · Bore Ø 53
O · Outside Ø 143
A · Centre to centre 170
t · Thickness 15,7
W · Bridge 70
DN 65 · NPS 2 1/2″ DN 65
NPS 2 1/2″
B · Bore Ø 63
O · Outside Ø 165
A · Centre to centre 195
t · Thickness 19,1
W · Bridge 76
DN 80 · NPS 3″ DN 80
NPS 3″
B · Bore Ø 78
O · Outside Ø 194
A · Centre to centre 230
t · Thickness 22,4
W · Bridge 76
DN 100 · NPS 4″ DN 100
NPS 4″
B · Bore Ø 102
O · Outside Ø 232
A · Centre to centre 275
t · Thickness 28,4
W · Bridge 89
DN 125 · NPS 5″ DN 125
NPS 5″
B · Bore Ø 128
O · Outside Ø 276
A · Centre to centre 325
t · Thickness 35,1
W · Bridge 89
DN 150 · NPS 6″ DN 150
NPS 6″
B · Bore Ø 154
O · Outside Ø 314
A · Centre to centre 370
t · Thickness 41,1
W · Bridge 89
DN 200 · NPS 8″ DN 200
NPS 8″
B · Bore Ø 198
O · Outside Ø 384
A · Centre to centre 440
t · Thickness 53,8
W · Bridge 102
DN 250 · NPS 10″ DN 250
NPS 10″
B · Bore Ø 248
O · Outside Ø 473
A · Centre to centre 540
t · Thickness 66,5
W · Bridge 114
DN 300 · NPS 12″ DN 300
NPS 12″
B · Bore Ø 289
O · Outside Ø 546
A · Centre to centre 620
t · Thickness 79,2
W · Bridge 114
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Female RTJ · Ring joint groove Dimensioned drawing Click the drawing to enlarge. B: inside diameter · O: outside diameter · A: centre-to-centre distance · t: thickness · W: bridge width.
The clearance hole, where required, shall have the same diameter as the flange bolt hole and shall not interfere with the bolts. Bridge thickness Wt is determined in accordance with Section 4.1 of the standard. The RTJ groove is dimensioned according to ASME B16.5.
Class 2500 · FEMALE RTJ Dimensions in mm. DN / NPS nominal sizes in bold.
DN NPS B · Bore Ø O · Outside Ø A · Centre to centre t · Thickness W · Bridge 15 1/2″ 21 65 90 25,4 38 20 3/4″ 27 73 95 28,4 45 25 1″ 34 83 110 28,4 54 32 1 1/4″ 42 102 130 35,1 54 40 1 1/2″ 48 114 145 38,1 61 50 2″ 61 133 170 41,1 57 65 2 1/2″ 73 149 195 47,8 61 80 3″ 89 168 230 50,8 76 100 4″ 114 203 270 63,5 83 125 5″ 141 241 325 73,2 89 150 6″ 168 279 370 82,6 95 200 8″ 219 340 440 98,6 95 250 10″ 273 425 540 117,3 91 300 12″ 324 495 620 133,4 152
DN 15 · NPS 1/2″ DN 15
NPS 1/2″
B · Bore Ø 21
O · Outside Ø 65
A · Centre to centre 90
t · Thickness 25,4
W · Bridge 38
DN 20 · NPS 3/4″ DN 20
NPS 3/4″
B · Bore Ø 27
O · Outside Ø 73
A · Centre to centre 95
t · Thickness 28,4
W · Bridge 45
DN 25 · NPS 1″ DN 25
NPS 1″
B · Bore Ø 34
O · Outside Ø 83
A · Centre to centre 110
t · Thickness 28,4
W · Bridge 54
DN 32 · NPS 1 1/4″ DN 32
NPS 1 1/4″
B · Bore Ø 42
O · Outside Ø 102
A · Centre to centre 130
t · Thickness 35,1
W · Bridge 54
DN 40 · NPS 1 1/2″ DN 40
NPS 1 1/2″
B · Bore Ø 48
O · Outside Ø 114
A · Centre to centre 145
t · Thickness 38,1
W · Bridge 61
DN 50 · NPS 2″ DN 50
NPS 2″
B · Bore Ø 61
O · Outside Ø 133
A · Centre to centre 170
t · Thickness 41,1
W · Bridge 57
DN 65 · NPS 2 1/2″ DN 65
NPS 2 1/2″
B · Bore Ø 73
O · Outside Ø 149
A · Centre to centre 195
t · Thickness 47,8
W · Bridge 61
DN 80 · NPS 3″ DN 80
NPS 3″
B · Bore Ø 89
O · Outside Ø 168
A · Centre to centre 230
t · Thickness 50,8
W · Bridge 76
DN 100 · NPS 4″ DN 100
NPS 4″
B · Bore Ø 114
O · Outside Ø 203
A · Centre to centre 270
t · Thickness 63,5
W · Bridge 83
DN 125 · NPS 5″ DN 125
NPS 5″
B · Bore Ø 141
O · Outside Ø 241
A · Centre to centre 325
t · Thickness 73,2
W · Bridge 89
DN 150 · NPS 6″ DN 150
NPS 6″
B · Bore Ø 168
O · Outside Ø 279
A · Centre to centre 370
t · Thickness 82,6
W · Bridge 95
DN 200 · NPS 8″ DN 200
NPS 8″
B · Bore Ø 219
O · Outside Ø 340
A · Centre to centre 440
t · Thickness 98,6
W · Bridge 95
DN 250 · NPS 10″ DN 250
NPS 10″
B · Bore Ø 273
O · Outside Ø 425
A · Centre to centre 540
t · Thickness 117,3
W · Bridge 91
DN 300 · NPS 12″ DN 300
NPS 12″
B · Bore Ø 324
O · Outside Ø 495
A · Centre to centre 620
t · Thickness 133,4
W · Bridge 152
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Male RTJ · Integral ring Dimensioned drawing Click the drawing to enlarge. B: inside diameter · A: centre-to-centre distance · t: thickness · W: bridge width.
The clearance hole, where required, shall have the same diameter as the flange bolt hole and shall not interfere with the bolts. Bridge thickness Wt is determined in accordance with Section 4.1 of the standard. Oval or octagonal rings are permitted. Their dimensions correspond to ASME B16.20, with Th = T + t; T is the ring height.
Class 2500 · MALE RTJ Dimensions in mm. DN / NPS nominal sizes in bold.
DN NPS B · Bore Ø A · Centre to centre t · Thickness W · Bridge 15 1/2″ 21 90 12,7 41 20 3/4″ 27 95 15,7 48 25 1″ 34 110 15,7 54 32 1 1/4″ 42 130 19,1 54 40 1 1/2″ 48 145 22,4 61 50 2″ 61 170 25,4 57 65 2 1/2″ 73 195 28,4 61 80 3″ 89 230 31,8 76 100 4″ 114 270 38,1 83 125 5″ 141 325 47,8 89 150 6″ 168 370 57,2 95 200 8″ 219 440 69,9 95 250 10″ 273 540 82,6 95 300 12″ 324 620 98,6 152
DN 15 · NPS 1/2″ DN 15
NPS 1/2″
B · Bore Ø 21
A · Centre to centre 90
t · Thickness 12,7
W · Bridge 41
DN 20 · NPS 3/4″ DN 20
NPS 3/4″
B · Bore Ø 27
A · Centre to centre 95
t · Thickness 15,7
W · Bridge 48
DN 25 · NPS 1″ DN 25
NPS 1″
B · Bore Ø 34
A · Centre to centre 110
t · Thickness 15,7
W · Bridge 54
DN 32 · NPS 1 1/4″ DN 32
NPS 1 1/4″
B · Bore Ø 42
A · Centre to centre 130
t · Thickness 19,1
W · Bridge 54
DN 40 · NPS 1 1/2″ DN 40
NPS 1 1/2″
B · Bore Ø 48
A · Centre to centre 145
t · Thickness 22,4
W · Bridge 61
DN 50 · NPS 2″ DN 50
NPS 2″
B · Bore Ø 61
A · Centre to centre 170
t · Thickness 25,4
W · Bridge 57
DN 65 · NPS 2 1/2″ DN 65
NPS 2 1/2″
B · Bore Ø 73
A · Centre to centre 195
t · Thickness 28,4
W · Bridge 61
DN 80 · NPS 3″ DN 80
NPS 3″
B · Bore Ø 89
A · Centre to centre 230
t · Thickness 31,8
W · Bridge 76
DN 100 · NPS 4″ DN 100
NPS 4″
B · Bore Ø 114
A · Centre to centre 270
t · Thickness 38,1
W · Bridge 83
DN 125 · NPS 5″ DN 125
NPS 5″
B · Bore Ø 141
A · Centre to centre 325
t · Thickness 47,8
W · Bridge 89
DN 150 · NPS 6″ DN 150
NPS 6″
B · Bore Ø 168
A · Centre to centre 370
t · Thickness 57,2
W · Bridge 95
DN 200 · NPS 8″ DN 200
NPS 8″
B · Bore Ø 219
A · Centre to centre 440
t · Thickness 69,9
W · Bridge 95
DN 250 · NPS 10″ DN 250
NPS 10″
B · Bore Ø 273
A · Centre to centre 540
t · Thickness 82,6
W · Bridge 95
DN 300 · NPS 12″ DN 300
NPS 12″
B · Bore Ø 324
A · Centre to centre 620
t · Thickness 98,6
W · Bridge 152
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