Slip on flange dimensions are covered in ASME B16.5 – which covers Pipe Flanges and Flanged Fittings for size NPS ½” to 24” for above NPS 26” to 60” it should be as per ASME B16.47.

During a dimensional inspection of slip on flange, you should check for

  • Outer & Inner Diameter of body
  • Bolt Circle & Bolt Hole Diameter
  • Length of the Hub
  • Straightness and alignment of the bolt hole
slip on flange dimensions

Class 150 Slip-on Flange Dimensions

Size in InchSize in mmOuter Dia.Flange Thick.Hub ODFlange LengthRF Dia.RF HeightPCDSocket BoreNo of BoltsBolt Size UNCMachine Bolt LengthRF Stud LengthHole SizeISO Stud SizeWeight 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

Class 300 Slip-on Flange Dimensions

Size in InchSize in mmOuter Dia.Flange Thick.Hub ODFlange LengthRF Dia.RF HeightPCDSocket BoreNo of BoltsBolt Size UNCMachine Bolt LengthRF Stud LengthHole SizeISO Stud SizeWeight 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 1/22052301 5/8M39216
Piping Courses

Class 400 Slip-on Flange Dimensions

Size in InchSize in mmOuter Dia.Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreNo of BoltsBolt Size UNCRF Stud LengthHole SizeISO Stud SizeWeight 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

Class 600 Slip-on Flange Dimensions

Size in InchSize in mmOuter Dia.Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreNo of BoltsBolt Size UNCRF Stud LengthHole SizeISO Stud SizeWeight 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

Class 900 Slip-on Flange Dimensions

Size in InchSize in mmOuter Dia.Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreNo of BoltsBolt Size UNCRF Stud LengthHole SizeISO Stud SizeWeight 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

Class 1500 Slip-on Flange Dimensions

Size in InchSize in mmOuter Dia.Flange ThicknessHub ODFlange LengthRF Dia.RF HeightPCDSocket BoreNo of BoltsBolt Size UNCRF Stud LengthHole SizeISO Stud SizeWeight 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

Disclaimer –  Please check with ASME B16.5 Before using.

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