Spectacle & Line Blinds

We offer a wide range of spectacle blinds, spacers and blanks manufacture to API standards and B31.3 specifications. We are capable of handling size ranges from 1″ – 150 lbs class to 36″ – 2500 lbs class.702. We also manufacture bleed rings and lateral joints also.

Types of Line Blinds
Line Blinds come in three basic forms with different names. These names include Spectacle Blinds, Figure Eights, Paddle Blinds, Skillet Blinds, Spades, and so on. These names describe particular devices used to isolate or “turn off” portions of piping systems. Line blinds can be used together with a valve or instead of a valve. At the right, we see an installed spectacle blind in the “open” position.Open spectacle blind

Spectacle Blinds

Spectacle & Line Blinds
Spectacle & Line Blinds

The line blind shown in use on the right is a spectacle blind or figure 8. In the small picture on the left you can see one of these blinds by itself. The name spectacle blind or figure 8 is due to it’s shape. The spectacle blind has both an open and a closed position. The spectacle blind is sometimes sold split into it’s two parts, the line blank, and the ring spacer.


Line BlanksFlange spreader with a line blank and two gasket

By itself, the solid side of the spectacle blind is called a line blank, skillet blind, paddle blank, paddle blind, or spade. Whether as half a spectacle blind or used by itself, the line blank forms a positive shut-off. The line is a “wafer style” device, meaning it fits inside the bolt hole circle. To the right you can see a flange spreader being used to prepare a pair of flanges to accept a line blank and two gaskets. In order to maintain the spacing of the flanges when the line is open, a ring spacer is used.

Ring SpacerFigure 8 open position spec blind
Ring spacers also fit “wafer style” but have a hole, or bore, to allow free flow of the material inside the pipe. The ring spacer is simply there to maintain the gap between the flanges when the line blank is not present.

There are three places in 29 CFR where line blinds are specifically noted as a safety device.

1) Permit-required confined spaces (1910.146) “…Blanking or blinding means the absolute closure of a pipe, line, or duct by the fastening of a solid plate (such as a spectacle blind or a skillet blind) that completely covers the bore and that is capable of withstanding the maximum pressure of the pipe, line, or duct with no leakage beyond the plate. ….”

2) Electric Power Generation, Transmission, and Distribution. (1910.269) “…Energy isolating device. A physical device that prevents the transmission or release of energy,
including, but not limited to, the following: a manually operated electric circuit breaker, a disconnect switch, a manually operated switch, a slide gate, a slip blind, a line valve, blocks, and any similar device with a visible indication of the position of the device. (Push buttons, selector switches, and other control-circuit-type devices are not energy isolating devices.) . …”

3) The control of hazardous energy (lockout/tagout) (1910.147) “…Lockout device. A device that utilizes a positive means such as a lock, either key or combination type, to hold an energy isolating device in the safe position and prevent the energizing of a machine or equipment. Included are blank flanges and bolted slip blinds. …”

Most spectacle blinds provided by SWECO® are defined by ASME Standard B16.48. B16.48 replaces API Standard 590* which is now obsolete. Additionally, line blinds are defined under other standards such as ASME B31.1, ASME B31.3, and Section VIII, Div 1, UG-34.

Thickness, outside diameter and bore diameter of B16.48 line blinds exactly match the pressure ratings and sizes of ASME B16.5 flanges which cover the Nominal Pipe Size (NPS) range from 1/2 inch through 24 inch. The pressure ratings are all defined and the line blinds are defined in raised face as well as both male and female RTJ configurations.

Ordering Information

Quantity, Figure Number, Size and Flange rating, Facing finish, Design Pressure, and temperature, or thickness, Delivery required.



Design Specifications

Paddle blanks, spacers and spectacle blinds may be purchased using carbon steel, 304 SS, 316 SS or any material which the customer may specify. Also several finishes are available as follows: smooth mill machined or serrated finish. All of our blanks are produced according to the thickness required in the ASME Code, B31.3-1987 edition. Regarding blanks section 304.5.3 specifies that the plate thickness shall be equal to
where d = inside diameter of gasket, P = design pressure, SE = allowable stress. Our blanks are designed to withstand any pressure-temperature combination listed in the ASA B16.5 flange design specifications. All ring joint dimensions and tolerances are in accordance with ASA B16.5 and B16.20. Octagonal rings are furnished unless oval rings are specified on male ring joint blanks. All blanks may be ordered with an eye-bolt welded to one end of the spectacle blind for support during installation.

Please contact our engineering department for custom design blanks. Our computerized stress analysis programs are always ready to meet our client needs.

Materials:
Normally A 285 Gr C plate is furnished for carbon steel up to and sometimes through 2″ thickness; A 515 Gr 70 plate, A 181 Class I or II forging, and A 105 Class I or II forging are normally furnished for high pressures or large line blinds.
Other carbon steel, low-alloy steel, stainless steel, or practically any alloy can be furnished.

Delivery:
Advise delivery required because sometimes plate can be used for a 2 to 4 week delivery. Forgings for say a 8 week delivery at a lower price than plate can be supplied, particularly on blinds 2″ and over in thickness.

Notes:
• Practically any alloy or special line blind can be furnished
• Carbon steel blinds have one shop coat of paint
• Tie bar and handle thickness is one half of blind thickness (minimum approximately)
• On all alloy blinds, handles and tie bars are carbon steel unless specifically requested.
• All blinds and spacers shown fit ASA B16.5 flanges. J dimension on male octagonal blind is 1/16″ more than half of the height of an octagonal ring joint gasket
• Sizes 1/2″ through 48″ and larger can be furnished

Class 150 – Female Ring Type Joint (F-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
10.75R-151.8750.560.500.3131.322.503.122.000.6341322
1 1/40.75R-172.2500.560.500.3131.662.883.502.000.6341322
1 1/20.75R-192.5630.560.500.3131.903.253.882.250.6341432
20.75R-223.2500.560.500.3132.384.004.752.250.7541543
2 1/20.88R-254.0000.560.500.3132.884.755.502.250.7541864
30.88R-294.5000.560.500.3133.505.256.002.250.75411074
3 1/20.88R-335.1880.560.500.3134.006.067.002.500.75411285
40.88R-365.8750.560.500.3134.506.757.502.500.754115106
51.00R-406.7500.560.500.3135.567.628.502.750.885120147
61.00R-437.6250.560.500.3136.628.629.503.250.885125188
81.12R-489.7500.560.500.3138.6210.7511.753.750.8851413011
101.25R-5212.0000.560.500.31310.7513.0014.254.001.0051654916
121.38R-5615.0000.560.500.31312.7516.0017.004.751.0061.51128131
141.38R-5915.6250.560.500.31314.0016.7518.755.001.1361.51188927
161.50R-6417.8750.560.500.31316.0019.0021.255.001.1361.516412437
181.62R-6820.3750.560.500.31318.0021.5022.755.001.2561.522417152
201.62R-7222.0000.560.500.31320.0023.5025.005.001.2571.526220457
241.88R-7626.5000.560.500.31324.0028.0029.506.001.3871.542833690

Class 300 – Female Ring Type Joint (F-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
10.75R-162.0000.560.500.3131.322.753.502.000.7541322
1 1/40.88R-182.3750.560.500.3131.663.123.882.000.7541432
1 1/20.88R-202.6880.560.500.3131.903.564.502.250.8841543
21.00R-233.2500.560.500.4382.384.255.002.250.7541854
2 1/21.12R-264.0000.690.630.5002.885.005.882.250.88411275
31.12R-314.8750.690.630.4383.505.756.622.250.88411596
3 1/21.12R-345.1880.690.630.4384.006.257.252.500.884117117
41.25R-375.8750.690.630.4384.506.887.882.500.885122149
51.38R-417.1250.690.630.4385.568.259.252.750.8851342213
61.38R-458.3130.690.630.4386.629.5010.623.250.8851452916
81.62R-4910.6250.690.630.4388.6211.8813.003.751.0051785326
101.75R-5312.7500.690.630.43810.7514.0015.254.001.13511137933
122.00R-5715.0000.690.630.43812.7516.2517.754.751.2561.517012147
142.12R-6116.5000.690.630.43814.0018.0020.255.001.2561.522515763
162.25R-6518.5000.690.630.43816.0020.0022.505.001.3861.528620575
182.38R-6921.0000.690.630.43818.0022.6224.755.001.3871.5385277102
202.75R-7323.0000.750.690.50020.0025.0027.005.001.3871.5539391141
243.12R-7727.2500.880.811.00024.0029.5032.006.001.6371.5838617209

Class 600 – Female Ring Type Joint (F-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
10.88R-162.0000.560.500.3131.322.753.502.000.7541432
1 1/40.88R-182.3750.560.500.3131.663.123.882.000.7541432
1 1/20.88R-202.6880.560.500.3131.903.564.502.250.8841543
21.12R-233.2500.560.500.4382.384.255.002.250.7541964
2 1/21.25R-264.0000.690.630.5002.885.005.882.250.88411386
31.25R-314.8750.690.630.4383.505.756.622.250.884116107
3 1/21.38R-345.1880.690.630.4384.006.257.252.501.004120138
41.38R-375.8750.690.630.4384.506.888.502.501.005125169
51.50R-417.1250.690.630.4385.568.2510.502.751.1351392414
61.75R-458.3130.690.630.4386.629.5011.503.251.1351573719
82.00R-4910.6250.690.630.4388.6211.8813.753.751.2561986531
102.25R-5312.7500.690.630.43810.7514.0017.004.001.386114810142
122.50R-5715.0000.690.630.43812.7516.2519.254.751.3861.521715159
142.62R-6116.5000.690.630.43814.0018.0020.755.001.5061.527919477
162.88R-6518.5000.690.630.43816.0020.0023.755.001.6371.537126295
183.12R-6921.0000.690.630.43818.0022.6225.755.001.7571.5508363134
203.50R-7323.0000.750.690.50020.0025.0028.505.001.7571.5692498180
244.12R-7727.2500.880.811.00024.0029.5033.006.002.0081.51113815276

Class 900 – Female Ring Type Joint (F-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
3/40.88R-141.7500.560.500.3131.052.623.501.750.8851422
10.88R-162.0000.560.500.3131.322.814.002.001.0051432
1 1/41.00R-182.5630.560.500.3131.663.194.382.001.0051533
1 1/21.00R-202.6880.560.500.3131.903.624.882.501.1351643
21.25R-243.7500.690.630.4382.384.886.502.001.00511386
2 1/21.38R-274.2500.690.630.4382.885.387.502.621.136118107
31.38R-314.8750.690.630.4383.506.127.502.621.006122139
41.62R-375.8750.690.630.4384.507.129.252.881.2561332012
51.75R-417.1250.690.630.4385.568.5011.002.881.3861493017
61.88R-458.3130.690.630.4386.629.5012.502.881.2561634021
82.25R-4910.6250.690.630.4388.6212.1215.503.121.50711197638
102.50R-5312.7500.690.630.43810.7514.2518.504.751.507117911651
122.88R-5715.0000.690.630.43812.7516.5021.004.751.5071.526717973
143.25R-6216.5000.880.810.62514.0018.3822.004.751.6371.5369250106
163.62R-6618.5000.880.810.62516.0020.6224.255.001.7571.5506350140
184.00R-7021.0001.000.940.75018.0023.3827.005.252.0081.5719497203
204.38R-7423.0001.000.940.75020.0025.5029.505.002.1381.5919647250
245.25R-7826.5001.311.251.00024.0030.3835.505.502.6381.515541101414

Class 1500 – Female Ring Type Joint (F-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
3/41.00R-141.7500.560.500.3131.052.623.501.750.8851332
11.00R-162.0000.560.500.3131.322.814.002.121.0051432
1 1/41.00R-182.3750.560.500.3131.663.194.382.121.0051533
1 1/21.12R-202.6880.560.500.3131.903.624.882.251.1351743
21.38R-243.7500.690.630.4382.384.886.502.121.00511487
2 1/21.50R-274.2500.690.630.4382.885.387.502.251.136119118
31.75R-355.3750.690.630.4383.506.628.002.881.2561321814
41.88R-396.3750.690.630.4384.507.629.503.001.3861442617
52.12R-447.6250.690.630.4385.569.0011.503.001.6361674025
62.38R-468.3130.750.690.5006.629.7512.503.121.5061845229
82.88R-5010.6250.880.810.6258.6212.5015.503.381.757116410355
103.25R-5412.7500.880.810.62510.7514.6219.005.252.0081.525015973
124.00R-5815.0001.131.060.87512.7517.2522.505.252.1381.5423271124
144.38R-6316.5001.311.251.00014.0019.2525.005.502.3891.5580369175
164.88R-6718.5001.441.381.12516.0021.5027.755.752.6391.5788513229
185.25R-7121.0001.441.381.12518.0024.1230.506.002.88101.51055694308
205.62R-7523.0001.561.501.12520.0026.5032.756.503.13101.51344897387
246.62R-7927.2501.751.631.37524.0031.2539.007.003.63101.521691468603

Class 2500 – Female Ring Type Joint (F-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/21.00R-131.6880.560.500.3130.842.563.501.500.8851422
3/41.12R-162.0000.560.500.3131.052.883.751.750.8851533
11.12R-182.3750.560.500.3131.323.254.252.121.0051643
1 1/41.38R-212.8440.690.630.4381.664.005.122.121.13511065
1 1/21.50R-233.2500.690.630.4381.904.505.752.381.25511587
21.62R-264.0000.690.630.4382.385.256.752.251.135120119
2 1/21.88R-284.3750.750.690.5002.885.887.752.381.2561291612
32.00R-325.0000.750.690.5003.506.629.003.001.3861382115
42.50R-386.1880.880.810.6254.508.0010.753.251.6371673726
52.88R-427.5001.000.940.7505.569.5012.753.501.88711076040
63.25R-479.0001.000.940.7506.6211.0014.503.752.13811589058
83.88R-5111.0001.131.060.8758.6213.3817.253.752.138126615993
104.62R-5513.5001.441.381.12510.7516.7521.253.582.6391.5488295174
125.25R-6016.0001.561.501.25012.7519.5024.386.002.8891.5742454260

Class 150 – Male Ring Type Joint (M-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
10.25R-151.8750.560.500.3131.322.193.122.000.6341211
1 1/40.25R-172.2500.560.500.3131.662.563.502.000.6341211
1 1/20.25R-192.5630.560.500.3131.902.883.882.250.6341221
20.25R-223.2500.560.500.3132.383.564.752.250.7541222
2 1/20.38R-254.0000.560.500.3132.884.315.502.250.7541864
30.38R-294.5000.560.500.3133.504.816.002.250.75411074
3 1/20.38R-335.1880.560.500.3134.005.507.002.500.75411285
40.38R-365.8750.560.500.3134.506.197.502.500.754115106
50.50R-406.7500.560.500.3135.567.068.503.000.885120147
60.50R-437.6250.560.500.3136.627.949.503.250.885125188
80.63R-489.7500.560.500.3138.6210.0611.753.750.8851413011
100.75R-5212.0000.560.500.31310.7512.3114.254.001.0051654916
120.88R-5615.0000.560.500.31312.7515.3117.004.751.0061.51128131
140.88R-5915.6250.560.500.31314.0015.9418.755.001.1361.51188927
161.00R-6417.8750.560.500.31316.0018.1921.255.001.1361.516412437
181.12R-6820.3750.560.500.31318.0020.6922.755.001.2561.522417152
201.12R-7222.0000.560.500.31320.0022.3125.005.001.2571.526220457
241.38R-7626.5000.560.500.31324.0026.8129.506.001.3871.542833690

Class 300 – Male Ring Type Joint (M-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
10.38R-162.0000.560.500.3131.322.313.502.000.7541222
1 1/40.38R-182.3750.560.500.3131.662.693.882.000.7541332
1 1/20.38R-202.6880.560.500.3131.903.004.502.250.8841443
20.50R-233.2500.560.500.4382.383.695.002.250.7541754
2 1/20.62R-264.0000.690.630.5002.884.505.882.250.88411175
30.62R-314.8750.690.630.4383.505.316.622.250.88411496
3 1/20.75R-345.1880.690.630.4384.005.637.252.500.884117117
40.62R-375.8750.690.630.4384.506.317.882.500.885122149
50.75R-417.1250.690.630.4385.567.569.252.750.8851342213
60.88R-458.3130.690.630.4386.628.7510.623.250.8851442916
81.00R-4910.6250.690.630.4388.6211.0613.003.751.0051785326
101.12R-5312.7500.690.630.43810.7513.1915.254.001.13511127933
121.38R-5715.0000.690.630.43812.7515.4417.754.751.2561.517012147
141.50R-6116.5000.690.630.43814.0016.9420.255.001.2561.522415763
161.62R-6518.5000.690.630.43816.0018.9422.505.001.3861.528520575
181.75R-6921.0000.690.630.43818.0021.4424.755.001.3871.5385277102
202.00R-7323.0000.750.690.50020.0023.5027.005.001.3871.5538391141
242.25R-7727.2500.880.811.00024.0028.2532.006.001.6371.5837617209

Class 600 – Male Ring Type Joint (M-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
10.38R-162.0000.560.500.3131.322.313.502.000.7541432
1 1/40.38R-182.3750.560.500.3131.662.693.882.250.7541432
1 1/20.38R-202.6880.560.500.3131.903.004.502.250.8841543
20.50R-233.2500.560.500.4382.383.695.002.000.7541964
2 1/20.62R-264.0000.690.630.5002.884.505.882.250.88411386
30.62R-314.8750.690.630.4383.505.316.622.620.884116107
3 1/20.75R-345.1880.690.630.4384.005.637.252.621.004120138
40.75R-375.8750.690.630.4384.506.318.502.881.005125169
50.88R-417.1250.690.630.4385.567.5610.502.881.1351392414
61.12R-458.3130.690.630.4386.628.7511.502.881.1351573719
81.38R-4910.6250.690.630.4388.6211.0613.753.251.2561986531
101.62R-5312.7500.690.630.43810.7513.1917.004.751.386114810142
121.88R-5715.0000.690.630.43812.7515.4419.254.751.3861.521715159
142.00R-6116.5000.690.630.43814.0016.9420.754.751.5061.527919477
162.25R-6518.5000.690.630.43816.0018.9423.755.001.6371.537126295
182.50R-6921.0000.690.630.43818.0021.4425.755.251.7571.5508363134
202.75R-7323.0000.750.690.50020.0023.5028.505.001.7571.5692498180
243.25R-7727.2500.880.811.00024.0028.2533.006.002.0081.51113815276

Class 900 – Male Ring Type Joint (M-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
3/40.38R-141.7500.560.500.3131.052.063.501.750.8841422
10.38R-162.0000.560.500.3131.322.314.002.001.0041432
1 1/40.50R-182.5630.560.500.3131.662.884.382.121.0041533
1 1/20.50R-202.6880.560.500.3131.903.004.882.121.1341643
20.62R-243.7500.690.630.4382.384.196.502.001.00411386
2 1/20.75R-274.2500.690.630.4382.884.697.502.121.134118107
30.75R-314.8750.690.630.4383.505.317.502.621.004122139
41.00R-375.8750.690.630.4384.506.319.252.881.2551.5332012
51.12R-417.1250.690.630.4385.567.5611.002.881.3851.5493017
61.25R-458.3130.690.630.4386.628.7512.502.881.2551.5634021
81.62R-4910.6250.690.630.4388.6211.0615.503.121.5051.51197638
101.88R-5312.7500.690.630.43810.7513.1918.504.751.5051.517911651
122.25R-5715.0000.690.630.43812.7515.4421.004.751.5051.526717973
142.38R-6216.5000.880.810.62514.0017.1322.004.751.6361.5369250106
162.75R-6618.5000.880.810.62516.0019.1324.255.001.7561.5506350140
183.00R-7021.0001.000.940.75018.0021.7527.005.252.0061.5719497203
203.38R-7423.0001.000.940.75020.0023.7529.505.002.1361.5919647250
243.88R-7826.5001.311.251.00024.0028.2535.506.002.6361.515541101414

Class 1500 – Male Ring Type Joint (M-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
3/40.38R-141.7500.560.500.3131.052.063.501.750.8841432
10.50R-162.0000.560.500.3131.322.314.002.121.0041432
1 1/40.50R-182.3750.560.500.3131.662.694.382.121.0041533
1 1/20.62R-202.6880.560.500.3131.903.004.882.251.1341743
20.75R-243.7500.690.630.4382.384.196.502.121.00411587
2 1/20.88R-274.2500.690.630.4382.884.697.502.251.134119118
31.12R-355.3750.690.630.4383.505.818.002.881.2541321814
41.25R-396.3750.690.630.4384.506.819.503.001.3851.5442617
51.50R-447.6250.690.630.4385.568.0611.503.001.6351.5684025
61.62R-468.3130.750.690.5006.628.8112.503.121.5051.5855229
82.00R-5010.6250.880.810.6258.6211.2515.503.381.7551.516410355
102.50R-5412.7500.880.810.62510.7513.3819.005.252.0051.525015973
122.88R-5815.0001.131.060.87512.7515.8822.505.252.1351.5423271124
143.12R-6316.5001.311.251.00014.0017.5025.005.502.3861.5580369175
163.50R-6718.5001.441.381.12516.0019.6327.755.752.6361.5789513229
183.88R-7121.0001.441.381.12518.0022.1330.506.002.8861.51056694308
204.25R-7523.0001.561.501.12520.0024.1332.756.503.1361.51345897387
245.00R-7927.2501.751.631.37524.0028.6339.007.003.6361.521691468603

Class 2500 – Male Ring Type Joint (M-RTJ)

NPStRingPTOvalTOctagARingBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.50R-131.6880.560.500.3130.842.003.501.620.8841422
3/40.62R-162.0000.560.500.3131.052.313.751.880.8841533
10.62R-182.3750.560.500.3131.322.694.252.121.0041643
1 1/40.75R-212.8440.690.630.4381.663.285.122.121.13411065
1 1/20.88R-233.2500.690.630.4381.903.695.752.381.25411587
21.00R-264.0000.690.630.4382.384.446.752.251.134120119
2 1/21.12R-284.3750.750.690.5002.884.887.752.381.2541291612
31.25R-325.0000.750.690.5003.505.509.003.001.3841382115
41.50R-386.1880.880.810.6254.506.8110.753.251.6351.5673726
51.88R-427.5001.000.940.7505.568.2512.753.501.8851.51076040
62.25R-479.0001.000.940.7506.629.7514.503.752.1351.51589058
82.75R-5111.0001.131.060.8758.6211.8817.253.752.1351.526615993
103.25R-5513.5001.441.381.12510.7514.6321.253.752.6351.5488295174
123.88R-6016.0001.561.501.25012.7517.2524.386.002.8851.5742454260

Class 150 – Raised Face (RF)

NPStBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.120.621.752.381.500.6341111
3/40.120.822.122.751.500.6341111
10.121.052.503.121.500.6341111
1 1/40.251.662.883.501.500.6341211
1 1/20.251.903.253.881.500.6341221
20.252.384.004.752.000.7541222
2 1/20.252.884.755.502.000.7541322
30.253.505.256.002.500.7541332
3 1/20.384.006.257.002.500.7541643
40.384.506.757.502.500.7541753
50.385.567.628.503.000.8841863
60.506.628.629.503.000.88411394
80.508.6210.8811.753.000.884119146
100.6210.7513.2514.254.001.005134269
120.7512.7516.0017.004.001.0051.5604517
140.7514.0017.6218.754.251.1361.5735420
160.8816.0020.1221.254.251.1361.51128231
181.0018.0021.5022.754.501.2561.513710632
201.1220.0023.7525.004.751.2561.518614443
241.2524.0028.1229.505.501.3861.528622562

Class 300 – Raised Face (RF)

NPStBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.250.622.002.621.500.6341111
3/40.250.822.503.251.500.7541211
10.251.052.753.501.500.7541211
1 1/40.251.663.123.881.500.7541221
1 1/20.251.903.624.501.500.8841222
20.382.384.255.002.000.7541432
2 1/20.382.885.005.882.000.8841532
30.383.505.756.622.500.8841643
3 1/20.504.006.387.252.500.8841864
40.504.507.007.882.500.88411074
50.625.568.389.253.000.884116117
60.626.629.7510.623.000.884122148
80.888.6212.0013.003.001.0041443015
101.0010.7514.1215.254.001.1351654620
121.1212.7516.5017.754.001.2551.5987029
141.2514.0019.0020.254.251.2551.515010348
161.5016.0021.1222.504.251.3851.521815366
181.6218.0023.3824.754.501.3851.528420283
201.7520.0025.6227.004.751.3861.5364262103
242.0024.0030.3832.005.501.6361.5577420158

Class 600 – Raised Face (RF)

NPStBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.250.622.002.621.500.6341111
3/40.250.822.503.251.500.7541211
10.251.052.753.502.250.7541211
1 1/40.381.683.123.882.250.7541222
1 1/20.381.903.624.502.620.8841322
20.382.164.255.002.250.7541432
2 1/20.502.645.005.882.620.8841643
30.503.265.756.622.620.8841754
3 1/20.623.766.257.253.001.00411065
40.624.267.508.503.001.00411496
50.755.309.3810.503.381.1341261611
60.886.3610.3811.503.381.1351643729
81.128.3312.5013.753.751.2551634123
101.3810.4215.6217.004.121.3851.51207743
121.6212.3917.8819.254.121.3851.518011962
141.7513.6219.2520.754.501.5051.522214875
162.0015.6222.1223.754.881.6361.5334223112
182.1217.6224.0025.755.251.7561.5406278129
202.5019.5626.7528.505.251.7561.5596407190
242.8823.5031.0033.006.002.0061.5896629268

Class 900 – Raised Face (RF)

NPStBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.250.622.383.251.500.8851211
3/40.250.822.623.501.620.8851211
10.251.053.004.002.251.0051221
1 1/40.381.443.384.382.251.0051322
1 1/20.381.683.754.882.621.1351322
20.502.165.506.502.251.0051744
2 1/20.502.646.387.502.621.1351965
30.623.266.507.502.621.00511175
40.754.268.009.253.001.255120129
50.885.309.6211.003.381.3851321914
61.006.3611.2512.503.381.2551493021
81.388.3314.0015.503.751.50511026241
101.6210.4217.0018.504.121.5051.517410767
121.8812.3919.5021.004.121.5051.526016398
142.1213.6220.3822.004.501.6361.5311201112
162.3815.6222.5024.254.881.7561.5416274143
182.6217.6225.0027.005.252.0061.5560373188
202.8819.5627.3829.505.252.1361.5731491241
243.5023.5032.8835.506.002.6361.51280860421

Class 1500 – Raised Face (RF)

NPStBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.250.622.383.251.500.8851211
3/40.380.822.623.501.620.8851222
10.381.053.004.002.201.0051222
1 1/40.381.383.384.382.501.0051322
1 1/20.501.613.754.882.751.1351432
20.502.075.506.502.751.0051744
2 1/20.622.476.387.503.001.13611276
30.753.076.758.003.001.25611597
40.884.038.129.503.501.3861241411
51.125.059.8811.503.501.6361442619
61.386.0611.0012.503.501.5061653927
81.627.9813.7515.504.001.75711177147
102.0010.0217.0019.004.502.0081.521813287
122.3811.9420.3822.504.502.1381.5373225148
142.6213.1222.6225.005.002.3891.5507305203
163.0015.0025.1227.755.252.6391.5707431277
183.3816.8827.6230.505.752.88101.5953586368
203.7518.8129.6232.756.003.13101.51193748447
244.3822.6235.3839.007.003.63101.519811245737

Class 2500 – Raised Face (RF)

NPStBOAWBolt HolePaddle/SpacerWeight
LHFig 8PaddleSpacer
1/20.380.622.623.501.500.8851222
3/40.380.822.883.751.620.8851222
10.381.053.254.252.501.0051322
1 1/40.501.384.005.122.501.1351433
1 1/20.621.614.505.752.751.2551643
20.622.075.626.752.751.1351955
2 1/20.752.476.507.753.001.25611487
30.883.077.629.003.001.3861231311
41.124.039.1210.753.501.6371392218
51.385.0510.8812.753.501.8871673830
61.626.0612.3814.503.502.1381.51005744
82.127.8115.1217.254.002.1381.519211182
102.629.7518.6221.254.502.6391.5357207151
123.1211.3721.5024.384.502.8891.5564328237

Class 150 – B16.47 SERIES A

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
26285 psi-20 to 100A516-7030.3726.0031.751.38377 lb
28285 psi-20 to 100A516-7032.6228.0034.001.38428 lb
30285 psi-20 to 100A516-7034.6230.0036.001.50519 lb
32285 psi-20 to 100A516-7036.8832.0038.501.63638 lb
34285 psi-20 to 100A516-7038.8834.0040.501.75760 lb
36285 psi-20 to 100A516-7041.1336.0042.751.88902 lb
38285 psi-20 to 100A516-7043.6338.0045.251.881013 lb
40285 psi-20 to 100A516-7045.6340.0047.252.001175 lb
42285 psi-20 to 100A516-7047.8842.0049.502.251447 lb
44285 psi-20 to 100A516-7050.1344.0051.752.251588 lb
46285 psi-20 to 100A516-7052.1346.0053.752.251700 lb
48285 psi-20 to 100A516-7054.3848.0056.002.381952 lb
50285 psi-20 to 100A516-7056.3750.0058.252.502199 lb
52285 psi-20 to 100A516-7058.6252.0060.502.632491 lb
54285 psi-20 to 100A516-7060.8754.0062.752.632683 lb
56285 psi-20 to 100A516-7063.1256.0065.002.632886 lb
58285 psi-20 to 100A516-7065.3758.0067.252.883378 lb
60285 psi-20 to 100A516-7067.3760.0069.252.883570 lb

Class 300 – B16.47 SERIES A

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
26740 psi-20 to 100A516-7032.7526.0034.502.25773 lb
28740 psi-20 to 100A516-7035.2528.0037.002.25896 lb
30740 psi-20 to 100A516-7037.3730.0039.252.381057 lb
32740 psi-20 to 100A516-7039.5032.0041.502.751349 lb
34740 psi-20 to 100A516-7041.5034.0043.502.751473 lb
36740 psi-20 to 100A516-7043.8836.0046.003.001787 lb
38740 psi-20 to 100A516-7041.3838.0043.003.001373 lb
40740 psi-20 to 100A516-7043.7540.0045.503.251676 lb
42740 psi-20 to 100A516-7045.7542.0047.503.501949 lb
44740 psi-20 to 100A516-7047.8744.0049.753.502143 lb
46740 psi-20 to 100A516-7050.0046.0052.003.752498 lb
48740 psi-20 to 100A516-7052.0048.0054.003.752692 lb
50740 psi-20 to 100A516-7054.1350.0056.254.003110 lb
52740 psi-20 to 100A516-7056.1352.0058.254.253524 lb
54740 psi-20 to 100A516-7058.6254.0061.004.253902 lb
56740 psi-20 to 100A516-7060.6256.0063.004.504378 lb
58740 psi-20 to 100A516-7062.6258.0065.004.754904 lb
60740 psi-20 to 100A516-7064.6260.0067.004.755200 lb

Class 600 – B16.47 SERIES A

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
261480 psi-20 to 100A516-7034.0026.0036.002.881129 lb
281480 psi-20 to 100A516-7035.8828.0038.003.131335 lb
301480 psi-20 to 100A516-7038.1330.0040.253.381612 lb
321480 psi-20 to 100A516-7040.1232.0042.503.631907 lb
341480 psi-20 to 100A516-7042.1234.0044.503.882206 lb
361480 psi-20 to 100A516-7044.3836.0047.003.882466 lb
381480 psi-20 to 100A516-7043.3738.0045.754.252352 lb
401480 psi-20 to 100A516-7045.3740.0047.754.502691 lb
421480 psi-20 to 100A516-7047.8842.0050.504.753197 lb
441480 psi-20 to 100A516-7049.8844.0052.505.003607 lb
461480 psi-20 to 100A516-7052.1346.0054.755.254107 lb
481480 psi-20 to 100A516-7054.6248.0057.505.504779 lb
501480 psi-20 to 100A516-7056.8850.0060.005.755435 lb
521480 psi-20 to 100A516-7058.8852.0062.005.755789 lb
541480 psi-20 to 100A516-7061.1354.0064.256.006474 lb
561480 psi-20 to 100A516-7063.3756.0066.756.257279 lb
581480 psi-20 to 100A516-7065.3758.0068.756.507986 lb
601480 psi-20 to 100A516-7068.1360.0071.756.759118 lb

Class 75 – B16.47 SERIES B

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
26285 psi-20 to 100A516-7027.7526.0028.501.00194 lb
28285 psi-20 to 100A516-7029.7528.0030.501.00224 lb
30285 psi-20 to 100A516-7031.7530.0032.501.13284 lb
32285 psi-20 to 100A516-7033.7532.0034.501.13315 lb
34285 psi-20 to 100A516-7035.7534.0036.501.25395 lb
36285 psi-20 to 100A516-7038.1836.0039.061.25457 lb
38285 psi-20 to 100A516-7040.2038.0041.081.38557 lb
40285 psi-20 to 100A516-7042.1840.0043.061.38608 lb
42285 psi-20 to 100A516-7044.1842.0045.061.50718 lb
44285 psi-20 to 100A516-7046.3844.0047.381.50801 lb
46285 psi-20 to 100A516-7048.3846.0049.381.63941 lb
48285 psi-20 to 100A516-7050.3848.0051.381.751092 lb
50285 psi-20 to 100A516-7052.3850.0053.381.751172 lb
52285 psi-20 to 100A516-7054.5052.0055.501.881362 lb
54285 psi-20 to 100A516-7056.5054.0057.501.881463 lb
56285 psi-20 to 100A516-7058.7656.0059.882.001697 lb
58285 psi-20 to 100A516-7060.7658.0061.882.001807 lb
60285 psi-20 to 100A516-7062.7660.0063.882.252158 lb

Class 150 – B16.47 SERIES B

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
26285 psi-20 to 100A516-7028.4326.0029.311.38297 lb
28285 psi-20 to 100A516-7030.4328.0031.311.38338 lb
30285 psi-20 to 100A516-7032.4330.0033.311.50408 lb
32285 psi-20 to 100A516-7034.5632.0035.441.63499 lb
34285 psi-20 to 100A516-7036.6934.0037.691.75612 lb
36285 psi-20 to 100A516-7038.7536.0039.751.75672 lb
38285 psi-20 to 100A516-7041.0038.0042.121.88816 lb
40285 psi-20 to 100A516-7043.0040.0044.122.00947 lb
42285 psi-20 to 100A516-7045.0042.0046.122.131098 lb
44285 psi-20 to 100A516-7047.0044.0048.122.251259 lb
46285 psi-20 to 100A516-7049.3146.0050.562.251394 lb
48285 psi-20 to 100A516-7051.3148.0052.562.381585 lb
50285 psi-20 to 100A516-7053.3150.0054.562.501796 lb
52285 psi-20 to 100A516-7055.3152.0056.562.632027 lb
54285 psi-20 to 100A516-7057.5054.0058.752.752288 lb
56285 psi-20 to 100A516-7059.5056.0060.752.752439 lb
58285 psi-20 to 100A516-7062.0658.0063.443.002927 lb
60285 psi-20 to 100A516-7064.0660.0065.443.003108 lb

Class 300 – B16.47 SERIES B

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
26740 psi-20 to 100A516-7030.2426.0031.622.25607 lb
28740 psi-20 to 100A516-7032.3728.0033.752.25689 lb
30740 psi-20 to 100A516-7034.7530.0036.252.38836 lb
32740 psi-20 to 100A516-7036.8832.0038.502.751085 lb
34740 psi-20 to 100A516-7039.0034.0040.622.751198 lb
36740 psi-20 to 100A516-7041.1336.0042.883.001449 lb
38740 psi-20 to 100A516-7043.1338.0044.883.001582 lb
40740 psi-20 to 100A516-7045.1340.0046.883.251856 lb
42740 psi-20 to 100A516-7047.1242.0049.003.502159 lb
44740 psi-20 to 100A516-7049.1244.0051.003.502333 lb
46740 psi-20 to 100A516-7051.7546.0053.753.752798 lb
48740 psi-20 to 100A516-7053.7548.0055.753.753002 lb
50740 psi-20 to 100A516-7055.6550.0057.654.003386 lb
52740 psi-20 to 100A516-7057.7552.0059.754.253861 lb
54740 psi-20 to 100A516-7060.1254.0062.124.254185 lb
56740 psi-20 to 100A516-7062.6256.0065.004.504878 lb
58740 psi-20 to 100A516-7065.0658.0067.444.755564 lb
60740 psi-20 to 100A516-7067.0660.0069.444.755870 lb

Class 600 – B16.47 SERIES B

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
261480 psi-20 to 100A516-7030.0026.0031.753.00811 lb
281480 psi-20 to 100A516-7032.1228.0034.003.25995 lb
301480 psi-20 to 100A516-7034.5030.0036.503.501241 lb
321480 psi-20 to 100A516-7036.6332.0038.753.751489 lb
341480 psi-20 to 100A516-7039.1234.0041.504.001836 lb
361480 psi-20 to 100A516-7041.1236.0043.504.002004 lb

Class 900 – B16.47 SERIES B

Material: Carbon Steel
NOTE: Thickness is calculated per B16.31, serrated finish is per B16.5 finish specification.
NOTE: SWECO does not recommend spectacle blinds in this size range, but recommends paddle spacer
sets instead.
NOTE: SWECO cannot guarantee that the web of these blinds can resist cantilevered forces in all
orientations.

Nom SizeWorking PressureTemperature RangeMaterialODIDCCtEstimated Weight
26285 psi-20 to 100A516-7032.8826.0035.503.631366 lb
28285 psi-20 to 100A516-7035.3728.0038.253.881695 lb
30285 psi-20 to 100A516-7037.6330.0040.754.132040 lb
32285 psi-20 to 100A516-7039.8832.0043.004.382387 lb
34285 psi-20 to 100A516-7042.1234.0045.504.632818 lb
36285 psi-20 to 100A516-7044.1336.0047.254.883143 lb
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