Short Description

Model No.: UNS-S31600-Spectacle-Blind-Flange-Ring-Type-Joint-4"-CL1500

China Figure-8 Blank Flange Manufacturer www.pipelinedubai.com offers ASME B16.48 A182 UNS S31600 Spectacle Blind Flange Ring-Type Joint, 4″, CL1500.

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Key Specifications / Features

Type: UNS S31600 Spectacle Blind Flange
Size: DN100 (4″)
Class Rate: 1500#
Material: 316 (S31600/1.4401)
Standard: ASME B16.48

China Figure-8 Blank Flange Manufacturer www.pipelinedubai.com offers ASME B16.48 A182 UNS S31600 Spectacle Blind Flange Ring-Type Joint, 4″, CL1500.


20200828005606 34071 - ASME B16.48 A182 UNS S31600 Spectacle Blind Flange Ring-Type Joint 4" CL1500

Chemical Composition and Mechanical Property For 316

Steel Grade

Chemical Composition

Mechanical Performance

C(Max)

Si(Max)

Mn(Max)

P(Max)

S(Max)

Ni

Cr

Mo

N

Tensile Strength
(Min)

Yield Strength
(Min)

Mpa

Mpa

316

0.08

0.75

2.00

0.045

0.03

10.0–14.0

16.0–18.0

2.00–3.00

0.1

515

205

What is a spectacle blind flange?

If the spade is put in between the flanges, it stops the fluid’s passage; Spectacle blind flange, also known as figure 8 flange which is combination of the two that can be rotated to function as single bind or a ring spacer. This kind of flange is generally a piece of metal than is cut to fit between two pipe flanges and usually sandwiched between two gaskets a spectacle blind is often made from two metal discs that are attached to each other by a small section of steel. The Sharp is similar to a pair of glasses or spectacles – hence the name spectacle blind flange. One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance. They are generally installed as a permanent device to separate process piping system.
The whole idea of a spectacle blind Flange is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just by passed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valve off and pressure relieved prior to loosening flange bolts and swinging the blind.
Spectacle Blind Flange may have a different type of joint face (RF Raised Face, FF Flat Face, RTJ Ring Joint), depending the type of flange.
Spectacle Blind Flange  is usually used on the oil line with two different functions:

  • If the spacer is put in between the flanges, the passage of the fluid is allowed.

The Spectacle Blind is inserted between two flanges: in order to guarantee a perfect  waterlight two gaskets are normally mounted , one on each side of spectacle blind.

asme b16.48 fig 8 bl frtj 1 - ASME B16.48 A182 UNS S31600 Spectacle Blind Flange Ring-Type Joint 4" CL1500

Technical drawing for the female ring-joint facing (F/RTJ) figure-8 blank (spectacle blind flange) made in accordance with ASME B16.48. A: centerline distance; O: outside diameter of blank flange; B: inside diameter of the open end; T: blank thickness; W: web width; t: thickness of the tie bar.
The female ring-joint groove dimensions shall be in accordance with ASME B16.5. Size of the hole on the tie bar (where required due to bolt spacing) shall be the same as the flange bolt hole and located such that it will not interfere with bolting between two flanges. The thickness of the tie bar dimension t, shall be capable of supporting the weight of the blank in all orientations without permanent deformation to the tie bar.

Dimensions & Weights of ASME B16.48 F/RTJ) Figure-8 Blank (spectacle blind flange)

Basic dimensions for ASME B16.48 Class 150 figure-8 blanks (spectacle blind flanges) with female ring-joint facing (F/RTJ)

NPS O A T W B
1 64 80 19.1 51 34
1-1/4 73 90 19.1 51 42
1-1/2 83 100 19.1 57 48
2 102 120 19.1 57 61
2-1/2 121 140 22.4 57 73
3 133 150 22.4 57 89
3-1/2 154 175 22.4 64 102
4 172 190 22.4 64 114
5 194 215 25.4 70 141
6 219 240 25.4 83 168
8 273 300 28.4 95 219
10 330 360 31.8 102 273
12 406 430 35.1 121 324
14 426 475 35.1 127 356
16 483 540 38.1 127 406
18 546 580 41.1 127 457
20 597 635 41.1 127 508
24 711 750 47.8 152 610

Basic dimensions for ASME B16.48 Class 300 figure-8 blanks (spectacle blind flanges) with female ring-joint facing (F/RTJ)

NPS O A T W B
1/2 51 65 15.7 38 21
3/4 64 80 19.1 45 27
1 70 90 19.1 51 34
1-1/4 79 100 22.4 51 42
1-1/2 90 115 22.4 57 48
2 108 125 25.4 57 61
2-1/2 127 150 28.4 57 73
3 146 170 28.4 57 89
3-1/2 159 185 28.4 64 102
4 175 200 31.8 64 114
5 210 235 35.1 70 141
6 241 270 35.1 83 168
8 302 330 41.1 95 219
10 356 385 44.5 102 273
12 413 450 50.8 121 324
14 457 515 53.8 127 356
16 508 570 57.2 127 406
18 575 630 60.5 127 457
20 635 685 69.9 127 508
24 749 810 79.2 152 610

Basic dimensions for ASME B16.48 Class 600 figure-8 blanks (spectacle blind flanges) with female ring-joint facing (F/RTJ)

NPS O A T W B
1/2 51 65 19.1 38 21
3/4 64 80 22.4 45 27
1 70 90 22.4 51 34
1-1/4 79 100 22.4 51 42
1-1/2 90 115 22.4 57 48
2 108 125 28.4 57 61
2-1/2 127 150 31.8 57 73
3 146 170 31.8 57 89
3-1/2 159 185 35.1 64 102
4 175 215 35.1 64 114
5 210 265 38.1 70 141
6 241 290 44.5 83 168
8 302 350 50.8 95 219
10 356 430 57.2 102 273
12 413 490 63.5 121 324
14 457 525 66.5 127 356
16 508 605 73.2 127 406
18 575 655 79.2 127 457
20 635 725 88.9 127 508
24 749 840 104.6 152 610

Basic dimensions for ASME B16.48 Class 900 figure-8 blanks (spectacle blind flanges) with female ring-joint facing (F/RTJ)

NPS O A T W B
1/2 61 80 22.4 38 21
3/4 67 90 22.4 45 27
1 71 100 22.4 51 34
1-1/4 81 110 25.4 51 42
1-1/2 92 125 25.4 64 48
2 124 165 31.8 51 61
2-1/2 137 190 35.1 67 73
3 155 190 35.1 67 89
4 181 235 41.1 73 114
5 216 280 44.5 73 141
6 241 315 47.8 73 168
8 308 395 57.2 80 219
10 362 470 63.5 121 273
12 419 535 73.2 121 324
14 467 560 82.6 121 356
16 524 615 91.9 127 406
18 594 685 101.6 133 457
20 648 750 111.3 127 508
24 772 900 133.4 140 610

Basic dimensions for ASME B16.48 Class 1500 figure-8 blanks (spectacle blind flanges) with female ring-joint facing (F/RTJ)

NPS O A T W B
1/2 61 80 22.4 38 21
3/4 67 90 25.4 45 27
1 71 100 25.4 54 34
1-1/4 81 110 25.4 54 42
1-1/2 92 125 28.4 57 48
2 124 165 35.1 54 61
2-1/2 137 190 38.1 57 73
3 168 205 44.5 73 89
4 194 240 47.8 76 114
5 229 290 53.8 76 141
6 248 315 60.5 79 168
8 318 395 73.2 86 219
10 371 480 82.5 133 273
12 438 570 101.6 133 324
14 489 635 111.3 140 356
16 546 705 124.0 146 406
18 613 775 133.0 152 457
20 673 830 142.7 165 508
24 794 990 168.1 178 610

Basic dimensions for ASME B16.48 Class 2500 figure-8 blanks (spectacle blind flanges) with female ring-joint facing (F/RTJ)

NPS O A T W B
1/2 65 90 25.4 38 21
3/4 73 95 28.4 45 27
1 83 110 28.4 54 34
1-1/4 102 130 35.1 54 42
1-1/2 114 145 38.1 61 48
2 133 170 41.1 57 61
2-1/2 149 195 47.8 61 73
3 168 230 50.8 76 89
4 203 270 63.5 83 114
5 241 325 73.2 89 141
6 279 370 82.6 95 168
8 340 440 98.6 95 219
10 425 540 117.3 91 273
12 495 620 133.4 152 324

Weights for spectacle blinds in sizes NPS 1/2″ through 24″ of Class 150, 300 & 600

NPS 150# 300# 600#
1/2 0.11 0.24 0.36
3/4 0.16 0.37 0.55
1 0.22 0.44 0.70
1-1/4 0.47 0.54 1.19
1-1/2 0.61 0.73 1.59
2 0.92 1.40 2.24
2-1/2 1.02 1.90 3.47
3 1.53 2.51 4.67
3-1/2 2.88 3.77 6.20
4 3.38 4.54 8.64
5 4.17 7.61 14.72
6 6.40 10.14 20.22
8 9.79 20.31 34.32
10 16.89 30.37 61.83
12 29.10 45.22 91.09
14 35.32 68.44 111.71
16 52.91 98.16 164.91
18 65.45 128.33 201.95
20 87.34 164.02 287.92
24 133.62 258.63 429.73

Weights for spectacle blinds in sizes NPS 1/2″ through 24″ of Class 900, 1500 & 2500

NPS 900# 1500# 2500#
1/2 0.44 0.45 0.69
3/4 0.58 0.76 0.85
1 0.77 1.00 1.14
1-1/4 1.31 1.34 2.06
1-1/2 1.66 2.00 3.04
2 3.82 3.88 4.70
2-1/2 5.00 5.96 7.20
3 6.42 8.13 11.34
4 10.99 13.04 19.63
5 17.42 22.68 32.65
6 25.95 33.07 47.98
8 51.34 57.73 90.35
10 84.77 104.42 164.42
12 125.66 175.32 257.53
14 150.30 235.47
16 200.37 326.04
18 367.65 439.22
20 347.27 546.48
24 594.27 899.45

Pressure Ratings of ASME B16.48 Spectacle Blind Flange

Flanges pressure rating in psig for Spectacle Blind Flange ASME
Temperature (F°) 150# 300# 400# 600# 900# 1500# 2500#
-20 to 100 285 740 985 1480 2220 3705 6170
200 260 680 905 1360 2035 3395 5655
300 230 655 870 1310 1965 3270 5450
400 200 635 845 1265 1900 3170 5280
500 170 605 805 1205 1810 3015 5025
600 140 570 755 1135 1705 2840 4730
650 125 550 730 1100 1650 2745 4575
700 110 530 710 1060 1590 2655 4425
750 95 505 675 1015 1520 2535 4230
800 80 410 550 825 1235 2055 3430
850 65 320 425 640 955 1595 2655
900 50 230 305 460 690 1150 1915
950 35 135 185 275 410 685 1145
1000 20 85 115 170 255 430 715



Summary
asme b16 48 a182 uns s31600 spectacle blind flange ring type joint 4 cl1500 - ASME B16.48 A182 UNS S31600 Spectacle Blind Flange Ring-Type Joint 4" CL1500
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Brand Name
Yaang
Name
ASME B16.48 A182 UNS S31600 Spectacle Blind Flange Ring-Type Joint 4" CL1500
USD 1-9999
Product Availability
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