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Slip-On Flanges Dimensions & Weights (ASME B16.5)

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The article shows the ASME B16.5 dimensions of Slip-On Flanges Classes from 150 to 2500 (NPS, ID, OD, Thickness, and bolting details, tolerances) – in millimeters.

ASME SLIP-ON FLANGE DIMENSIONS & WEIGHTS

The article shows the ASME B16.5 dimensions and weights for slip-on flanges.

SLIP-ON FLANGE SIZES IN MILLIMETERS

SLIP-ON CLASS 150

slip on flanges dimensions ASME B165 copia
Slip on flanges dimensions ASME B1.65
NPSDNOD (mm)Flange Thick.Hub ODFlange LengthRF Dia.RF HeightPCDSocket BoreBolts
#
Bolt Size UNCMachine Bolt LengthRF Stud LengthHole SizeMetric StudsWeight in kg
  ABCDEFGH       
1/215909.6301434.9260.322.241/250555/8M140.8
3/42010011.2381442.9269.927.741/250655/8M140.9
12511012.7491650.8279.434.541/255655/8M140.9
1 1/43211514.3591963.5288.943.241/255705/8M141.4
1 1/24012515.9652173298.449.541/265705/8M141.4
25015017.5782492.12120.761.945/870853/4M162.3
2 1/26518020.79027104.82139.774.645/875903/4M163.2
38019022.3108291272152.490.745/875903/4M163.7
3 1/29021522.312230139.72177.8103.485/875903/4M165
410023022.313532157.22190.5116.185/875903/4M165.9
512525522.316435185.72215.9143.883/485957/8M206.8
615028023.919238215.92241.3170.783/4851007/8M208.6
82003452724643269.92298.5221.583/4901107/8M2013.7
1025040528.630548323.82362276.2127/81001151M2419.5
1230048530.2365543812431.8327127/81001201M2429
1435053533.440056412.82476.3359.21211151351 1/8M2741
164005953545762469.92539.8410.51611151351 1/8M2754
1845063538.150567533.42577.9461.8161 1/81251451 1/4M3059
2050070041.355971584.22635513.1201 1/81401601 1/4M3075
2460081546.166381692.22749.3616201 1/41501701 3/8M33100

SLIP-ON CLASS 300

slip on flanges dimensions ASME B165 copia

NPSDNOD (mm)Flange Thick.Hub ODFlange LengthRF Dia.RF HeightPCDSocket BoreBolts
#
Bolt Size UNCMachine Bolt LengthRF Stud LengthHole SizeMetric StudsWeight in kg
  ABCDEFGH       
1/2159512.7382134.9266.722.241/255655/8M141.2
3/42011514.3482442.9282.627.745/865753/4M161.4
12512515.9542550.8288.934.545/865753/4M161.4
1 1/43213517.5642563.5298.443.245/870853/4M161.8
1 1/24015519.17029732114.349.543/475907/8M202.7
25016520.7843292.1212761.985/875903/4M163.2
2 1/26519023.910037104.82149.274.683/4851007/8M204.6
38021027117411272168.390.783/4901107/8M205.9
3 1/29023028.613343139.72184.2103.483/4951107/8M207.7
410025530.214646157.22200116.883/4951157/8M2010
512528033.417849185.72235144.483/41101207/8M2012.7
61503203520651215.92269.9171.4123/41101207/8M2017.7
820038039.726060269.92330.2222.2127/81201401M2426
1025044546.132165323.82387.4277.41611401601 1/8M2736
1230052049.3375713812450.8328.2161 1/81451701 1/4M3052
1435058552.442575412.82514.4360.2201 1/81601801 1/4M3075
1640065055.648381469.92571.5411.2201 1/41651901 3/8M3386
1845071058.853387533.42628.6462.3241 1/41701951 3/8M33113
205007756258794584.22685.8514.4241 1/41852051 3/8M33143
2460091568.3702105692.22812.8616241 1/2205

SLIP-ON CLASS 400

slip on flanges dimensions ASME B165 copia

NPSDNOD (mm)Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreBolts
#
Bolt Size UNCRF Stud LengthHole SizeMetric StudsWeight in kg
  ABCDEFGH      
1/2159514.3382234.9766.722.241/2755/8M141.3
3/42011515.9482542.9782.627.745/8903/4M161.5
12512517.5542750.8788.934.545/8903/4M161.8
1 1/43213520.7642963.5798.443.245/8953/4M162.3
1 1/24015522.37032737114.349.543/41107/8M203.2
25016525.4843792.1712761.985/81103/4M164.1
2 1/26519028.610041104.87149.274.683/41207/8M205.9
38021031.8117461277168.390.783/41257/8M207.3
41002553514651157.27200116.187/81401M2411.8
512528038.117854185.77235143.887/81451M2414.1
615032041.320657215.97269.9170.7127/81501M2420
820038047.726068269.97330221.51211701 1/8M2731
102504455432173323.87387.4276.2161 1/81901 1/4M3042
1230052057.2375793817450.8327161 1/42051 3/8M3359
1435058560.442584412.87514.4359.2201 1/42101 3/8M3382
1640065063.548394469.97571.5410.5201 3/82201 1/2M36107
1845071066.753398533.47628.6461.8241 3/82301 1/2M36130
2050077569.9587102584.27685.8513.1241 1/22401 3/4M39157
2460091576.2702114692.27812.8616241 3/42651 7/8M45232

SLIP-ON CLASS 600

slip on flanges dimensions ASME B165 copia

NPSDNOD (mm)Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreBolts
#
Bolt Size UNCRF Stud LengthHole SizeMetric StudsWeight in kg
  ABCDEFGH      
1/2159514.3382234.9766.722.241/2755/8M141.3
3/42011515.9482542.9782.627.745/8903/4M161.4
12512517.5542750.8788.934.545/8903/4M161.8
1 1/43213520.7642963.5798.443.245/8953/4M162.3
1 1/24015522.37032737114.349.543/41107/8M203.2
25016525.4843792.1712761.985/81103/4M164.1
2 1/26519028.610041104.87149.274.683/41207/8M205.9
38021031.8117461277168.390.783/41257/8M207.3
410027538.115254157.27215.9116.187/81451M2416.8
512533044.518960185.77266.7143.8811651 1/8M2729
615035547.722267215.97292.1170.71211701 1/8M2736
820042055.627376269.97349.2221.5121 1/81901 1/4M3052
1025051063.534386323.87431.8276.2161 1/42151 3/8M3377
1230056066.7400923817489327201 1/42201 3/8M3391
1435060569.943294412.87527359.2201 3/82351 1/2M36105
1640068576.2495106469.97603.2410.5201 1/22551 5/8M39150
1845074582.6546117533.47654461.8201 5/82751 3/4M42182
2050081588.9610127584.27723.9513.1241 5/82851 3/4M42232
24600940101.6718140692.27838.2616241 7/83302M48332

SLIP-ON CLASS 900

slip on flanges dimensions ASME B165 copia

NPSDNOD (mm)Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreBolts
#
Bolt Size UNCRF Stud LengthHole SizeMetric StudsWeight in kg
  ABCDEFGH      
1/21512022.3383234.9782.622.243/41107/8M201.8
3/42013025.4443542.9788.927.743/41157/8M202.3
12515028.6524150.87101.634.547/81251M243.6
1 1/43216028.6644163.57111.143.247/81251M244.1
1 1/24018031.87044737123.849.5411401 1/8M275.5
25021538.11055792.17165.161.987/81451M2411.5
2 1/26524541.312464104.87190.574.6811601 1/8M2716.5
38024038.1127541277190.590.787/81451M2412
410029044.515970157.27235116.181 1/81701 1/4M3024
512535050.819079185.77279.4143.881 1/41901 3/8M3338
615038055.623586215.97317.5170.7121 1/81901 1/4M3050
820047063.5298102269.97393.7221.5121 3/82201 1/2M3678
1025054569.9368108323.87469.9276.2161 3/82351 1/2M36112
1230061079.44191173817533.4327201 3/82551 1/2M36148
1435064085.8451130412.87558.8359.2201 1/22751 5/8M39182
1640070588.9508133469.97616410.5201 5/82851 3/4M42193
18450785101.6565152533.47685.8461.8201 7/83252M48258
20500855108622159584.27749.3513.12023502 1/8M52317
246001040139.7749203692.27901.7616202 1/24402 5/8M64608

SLIP-ON CLASS 1500

slip on flanges dimensions ASME B165 copia

NPSDNOD (mm)Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreBolts
#
Bolt Size UNCRF Stud LengthHole SizeMetric StudsWeight in kg
  ABCDEFGH      
1/21512022.3383234.9782.622.243/41107/8M201.8
3/42013025.4443542.9788.927.743/41157/8M202.3
12515028.6524150.87101.634.547/81251M243.7
1 1/43216028.6644163.57111.143.247/81251M244.1
1 1/24018031.87044737123.849.5411401 1/8M275.5
25021538.11055792.17165.161.987/81451M249.8
2 1/26524541.312464104.87190.574.6811601 1/8M2716.4

SLIP-ON FLANGE TOLERANCE

ASME B16.5 provides specific tolerances for slip-on flanges across various dimensions to ensure proper fit, alignment, and sealing capability within piping systems. While it’s important to refer directly to the ASME B16.5 standard for comprehensive and specific tolerance values due to variations across different flange sizes and pressure classes, below are general examples of tolerances for slip-on flanges as outlined in the standard:

Diameter of Bolt Circle (P):

The tolerance for the diameter of the bolt circle is typically ±1.6 mm (±1/16 inch) for flanges up to and including NPS 24.

Diameter of Bolt Holes (Q):

The diameter of bolt holes is generally oversized to allow for ease of alignment and assembly, with a common tolerance of +3 mm (1/8 inch) on the nominal bolt hole size.

Flange Thickness (T):

Tolerance for flange thickness can vary, but a general guideline for flanges up to NPS 24 is ±3 mm (±1/8 inch), depending on the pressure class and size of the flange.

Hub Length (Length through Hub, Y):

For slip-on flanges, the hub length tolerance can be important, especially for alignment during welding. Tolerances can vary but might be around ±1.6 mm (±1/16 inch) for smaller sizes.

Outside Diameter (O):

Tolerance for the outside diameter of a slip-on flange might be around ±1.6 mm (±1/16 inch) for sizes up to NPS 24, ensuring the flange fits within standardized fittings and equipment.

Bore Diameter (B):

The tolerance of the bore diameter ensures the flange does not restrict flow or create turbulence. Tolerances vary by size and class but could be in the range of -0 mm/+3 mm (-0 inch/+1/8 inch) for smaller flanges.

Facing Finish:

The surface finish of the flange face where the gasket seats is critical for ensuring a proper seal. ASME B16.5 specifies the surface finish in terms of Ra (Roughness Average), with specific values depending on the type of gasket and sealing surface.

It’s important to consult the latest edition of the ASME B16.5 standard or work with a qualified engineer to obtain the exact tolerance values for the specific slip-on flanges being used in a project. Adherence to these tolerances is critical for the safety, reliability, and efficiency of piping systems.

SLIP-ON FLANGE WEIGHTS

SLIP-ON FLANGE WEIGHT in KGS.

The table shows the ASME B16.5 slip-on flange weights in Kgs. by Flange NPS and Class (carbon/alloy steel materials; for higher grades, consider adjusting weight using the delta-specific weight carbon/other grades)

NPSClass
150
Class
300
Class
400
Class
600
Class
900
Class 1500
 1/20.50.90.90.92.72.7
 3/40.91.41.41.42.72.7
1   0.91.41.61.83.43.6
1.4222.34.54.5
1.42.92.93.26.36.3
2   2.33.23.64.19.911.3
3.64.55.45.913.916.2
3   4.15.96.87.216.221.6
47.79.59.5  
4   5.910.611.716.723.932.9
5   6.81313.928.437.459.4
6   8.617.619.83649.574.3
8   13.526.130.251.877.4117
10   19.436.54079.7110.3196.2
12   28.851.858.596.8146.7300.2
14   40.574.385116.6180423
16   47.794.5113.9164.7206.6562.5
18   58.5113.9139.5214.2291.2731.3
20   74.3141.8170.1275.4356.4922.5
22   83.3166.5182.3265.5  
24   99220.5242.6394.26661271

SLIP-ON FLANGE WEIGHT in LBS.

The table shows the ASME B16.5 slip-on flange weights in Lbs. by Flange NPS and Class (carbon/alloy steel materials; for higher grades, consider adjusting weight using the delta-specific weight carbon/other grades)

CLASS 150Nominal Pipe SizeSlip On Weight in Lbs./unit
 ½1
 ¾2
 12
 3
 3
 25
 8
 39
 11
 413
 515
 619
 830
 1043
 1264
 1490
 16106
 18130
 20165
 22185
 24220
CLASS 300Nominal Pipe SizeSlip On Weight in Lbs./unit
 ½2
 ¾3
 13
 4.5
 6.5
 27
 10
 313
 17
 423.5
 529
 639
 858
 1081
 12115
 14165
 16210
 18253
 20315
 22370
 24490
CLASS 400Nominal Pipe SizeSlip On Weight in Lbs./unit
 ½2
 ¾3
 13.5
 4.5
 6.5
 28
 12
 315
 21
 426
 531
 644
 867
 1091
 12130
 14191
 16253
 18310
 20378
 22405
 24539
CLASS 600Nominal Pipe SizeSlip On Weight in Lbs./unit
 ½2
 ¾3
 14
 5
 7
 29
 13
 316
 21
 437
 563
 680
 8115
 10177
 12215
 14259
 16366
 18476
 20612
 22590
 24876
CLASS 900Nominal Pipe SizeSlip On Weight in Lbs./unit
 ½6
 ¾6
 17.5
 10
 14
 222
 31
 336
 453
 583
 6110
 8172
 10245
 12326
 14400
 16459
 18647
 20792
 241480
CLASS 1500Nominal Pipe SizeSlip On Weight in Lbs./unit
 ½6
 ¾6
 18
 10
 14
 225
 36
 348
 473
 5132
 6165
 8260
 10436
 12667
 14940
 161250
 181625
 202050
 242825

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The information provided in this blog post is intended for general informational purposes only and should not be construed as professional advice. While we strive to provide accurate and up-to-date information, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability, or availability of the content contained herein. Any reliance you place on the information presented in this blog post is strictly at your own risk. We disclaim any liability for any loss or damage, including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from reliance on information contained in this blog post. We encourage readers to verify the accuracy and relevance of any information presented here with other sources and seek professional advice or guidance where appropriate. Links to third-party websites or resources provided in this blog post are for convenience only and do not imply endorsement or approval of the content, products, services, or opinions expressed on those websites. We have no control over the nature, content, and availability of those sites and assume no responsibility for their accuracy, legality, or decency. We reserve the right to modify, update, or remove any content in this blog post at any time without prior notice. By accessing and using this blog post, you acknowledge and agree to these terms and conditions. If you do not agree with these terms, please refrain from accessing or using the information provided herein.

About the Author

Projectmaterials Team

Projectmaterials Team

Blog.projectmaterials.com is an online resource dedicated to providing in-depth information, analysis, and educational content related to the fields of project materials management, engineering, and procurement, particularly within the oil & gas, construction, shipbuilding, energy, and renewable energy sectors. It aims to serve professionals and enthusiasts in these industries by offering valuable insights into materials, equipment, and techniques used in various projects, focusing on the selection, application, and maintenance of these resources. Key features of the blog include: * Educational Articles: Comprehensive posts that cover topics ranging from the technical aspects of piping products (pipes, valves, fittings, flanges, gaskets, bolts, instrumentation) to structural steel and process equipment (including oil extraction systems, drilling rigs, wellheads, pumps, compressors, and separation systems). * Industry Insights: Updates on the latest trends, technologies, and regulatory changes affecting the industries covered. * Guides and How-Tos: Practical advice on selecting the right materials and equipment for specific applications, as well as tips on installation, maintenance, and troubleshooting. * Safety and Standards: Information on safety equipment for production sites, risk mitigation procedures, and an overview of relevant industry standards and regulatory frameworks. The website is designed to support the professional development of engineers, procurement specialists, project managers, and other stakeholders involved in project plant businesses, by disseminating critical know-how and best practices. Whether readers are new to the field or seasoned professionals, blog.projectmaterials.com offers resources to enhance their understanding and performance in managing project materials effectively.

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