Main product image: ASME B16.5 stainless steel slip-on flange

Slip-On Flanges

Certification standards

ASME B16.5
ISO 7005
INTRO

The Slip-On Flange is designed to accommodate lower pressure and temperature applications, featuring a central bore that matches the outside diameter of the pipe. This allows for easy pipe insertion and secure fillet welding on both the interior and exterior sides.

The absence of a weld bevel offers flexibility in adjusting pipe length relative to the flange”s position.

Available in large sizes, Slip-On Flanges are ideal for connecting big-bore piping to storage tank nozzles. Typically forged with a hub, they can also be fabricated without one in a ring style for applications with limited space.

Standard：
GB/T9119-2010
HG/T20592-2009
HG/T20615-2009
DIN
ASME
BS
JISMaterial：
304：F304 S30408 S30408II S30408III S30400
304L：S30403 S30403II 30403 30403II
316L：31603 31603II 31603III
2507（F53）
2205（F51）
TP310S（06Cr5Ni20）
TP321（06Cr18Ni11）
S22053III=2205III
T321-32168=321

///CLASS 150///

Nominal size Steel Pipe outer diameter Connection size flange thickness flange inner diameter flange neck big end flange height
DN NPS A Flange outer diameter D Central circle diameter K Bolt hole diameter L Number of bolt holes n Bolt Th C B N H
15 1/2 21.3 90 60.3 16 4 M14 9.6 22.5 30 14
20 3/4 26.9 100 69.9 16 4 M14 11.2 27.5 38 14
25 1 33.7 110 79.4 16 4 M14 12.7 34.5 49 16
32 1 1/4 42.4 115 88.9 16 4 M14 14.3 43.5 59 19
40 1 1/2 48.3 125 98.4 16 4 M14 15.9 49.5 65 21
50 2 60.3 150 120.7 18 4 M16 17.5 61.5 78 24
65 2 1/2 76.1 180 139.7 18 4 M16 20.7 77.6 90 27
80 3 88.9 190 152.4 18 4 M16 22.3 90.5 108 29
100 4 114.3 230 190.5 18 8 M16 22.3 116.0 135 32
125 5 139.7 255 215.9 22 8 M20 22.3 143.5 164 35
150 6 168.3 280 241.3 22 8 M20 23.9 170.5 192 38
200 8 219.1 345 298.5 22 8 M20 27.0 221.5 246 43
250 10 273.0 405 362 26 12 M24 28.6 276.5 305 48
300 12 323.9 485 431.8 26 12 M24 30.2 328.0 365 54
350 14 355.6 535 476.3 30 12 M27 33.4 360.0 400 56
400 16 406.4 595 539.8 30 16 M27 35.0 411.0 457 62
450 18 457 635 577.9 33 16 M30 38.1 462.0 505 67
500 20 508 700 635 33 20 M30 41.3 513.5 559 71
600 24 610 815 749.3 36 20 M33 46.1 616.5 663 81

///CLASS 300///

Nominal size Steel Pipe outer diameter Connection size flange thickness flange inner diameter flange neck big end flange height
DN NPS A Flange outer diameter D Central circle diameter K Bolt hole diameter L Number of bolt holes n Bolt Th C B N H
15 1/2 21.3 95 66.7 16 4 M14 12.7 22.5 38 21
20 3/4 26.9 115 82.6 18 4 M16 14.3 27.5 48 24
25 1 33.7 125 88.9 18 4 M16 15.9 34.5 54 25
32 1 1/4 42.4 135 98.4 18 4 M16 17.5 43.5 64 25
40 1 1/2 48.3 155 114.3 22 4 M20 19.1 49.5 70 29
50 2 60.3 165 127 18 8 M16 20.7 61.5 84 32
65 2 1/2 76.1 190 149.2 22 8 M20 23.9 77.6 100 37
80 3 88.9 210 168.3 22 8 M20 27 90.5 117 41
100 4 114.3 255 200 22 8 M20 30.2 116 146 46
125 5 139.7 280 235 22 8 M20 33.4 143.5 178 49
150 6 168.3 320 269.9 22 12 M20 35 170.5 206 51
200 8 219.1 380 330.2 26 12 M24 39.7 221.5 260 60
250 10 273 445 387.4 30 16 M27 46.1 276.5 321 65
300 12 323.9 520 450.8 33 16 M30 49.3 328 375 71
350 14 355.6 585 514.4 33 20 M30 52.4 360 425 75
400 16 406.4 650 571.5 36 20 M33 55.6 411 483 81
450 18 457 710 628.6 36 24 M33 58.8 462 533 87
500 20 508 775 685.8 36 24 M33 62 513.5 587 94
600 24 610 915 812.8 42 24 M39X3 68.3 616.5 702 105

///CLASS 600///

Nominal size Steel Pipe outer diameter Connection size flange thickness flange inner diameter flange neck big end flange height
DN NPS A Flange outer diameter D Central circle diameter K Bolt hole diameter L Number of bolt holes n Bolt Th C B N H
15 1/2 21.3 95 66.7 16 4 M14 14.3 22.5 38 22
20 3/4 26.9 115 82.6 18 4 M16 15.9 27.5 48 25
25 1 33.7 125 88.9 18 4 M16 17.5 34.5 54 27
32 1 1/4 42.4 135 88.4 18 4 M16 20.7 43.5 64 29
40 1 1/2 48.3 155 114.3 22 4 M20 22.3 49.5 70 32
50 2 60.3 165 127 18 8 M16 25.4 61.5 84 37
65 2 1/2 76.1 190 149.2 22 8 M20 28.6 77.6 100 41
80 3 88.9 210 168.3 22 8 M20 31.8 90.5 117 46
100 4 114.3 275 215.9 26 8 M24 38.1 116 152 54
125 5 139.7 330 266.7 30 8 M27 44.5 143.5 189 60
150 6 168.3 355 292.1 30 12 M27 47.7 170.5 222 67
200 8 219.1 420 349.2 33 12 M30 55.6 221.5 273 76
250 10 273 510 431.8 36 16 M33 63.5 276.5 343 86
300 12 323.9 560 489 36 20 M33 66.7 328 400 92
350 14 355.6 605 527 39 20 M36X3 69.9 360 432 94
400 16 406.4 685 603.2 42 20 M39X3 76.2 411 495 106
450 18 457 745 654 45 20 M42X3 82.6 462 546 117
500 20 508 815 723.9 45 24 M42X3 88.9 513.5 610 127
600 24 610 940 838.2 51 24 M48X3 101.6 616.5 718 140

///CLASS 900///

Nominal size Steel Pipe outer diameter Connection size flange thickness flange inner diameter flange neck big end flange height
DN NPS A Flange outer diameter D Central circle diameter K Bolt hole diameter L Number of bolt holes n Bolt Th C B N H
15 1/2 21.3 120 82.6 22 4 M20 22.3 22.5 38 32
20 3/4 26.9 130 88.9 22 4 M20 25.4 27.5 44 35
25 1 33.7 150 101.6 26 4 M24 28.6 34.5 52 41
32 1 1/4 42.4 160 111.1 26 4 M24 28.6 43.5 64 41
40 1 1/2 48.3 180 123.8 30 4 M27 31.8 49.5 70 44
50 2 60.3 215 165.1 26 8 M24 38.1 61.5 105 57
65 2 1/2 76.1 245 190.5 30 8 M27 41.3 77.6 124 64
80 3 88.9 240 190.5 26 8 M24 38.1 90.5 127 54
100 4 114.3 290 235 33 8 M30 44.5 116 159 70
125 5 139.7 350 279.4 36 8 M33 50.8 143.5 190 79
150 6 168.3 380 317.5 33 12 M30 55.6 170.5 235 86
200 8 219.1 470 393.7 39 12 M36X3 63.5 221.5 298 102
250 10 273 545 469.9 39 16 M36X3 69.9 276.5 368 108
300 12 323.9 610 533.4 39 20 M36X3 79.4 328 419 117
350 14 355.6 640 558.8 42 20 M39X3 85.8 360 451 130
400 16 406.4 705 616 45 20 M42X3 88.9 411 508 133
450 18 457 785 685.8 51 20 M48X3 101.6 462 565 152
500 20 508 855 749.3 55 20 M52X3 108 513.5 622 159
600 24 610 1040 901.7 68 20 M64X3 139.7 616.5 749 203

///CLASS 1500///

Nominal size Steel Pipe outer diameter Connection size flange thickness flange inner diameter flange neck big end flange height
DN NPS A Flange outer diameter D Central circle diameter K Bolt hole diameter L Number of bolt holes n Bolt Th C B N H
15 1/2 21.3 120 82.6 22 4 M20 22.3 22.5 38 32
20 3/4 26.9 130 88.9 22 4 M20 25.4 27.5 44 35
25 1 33.7 150 101.6 26 4 M24 28.6 34.5 52 41
32 1 1/4 42.4 160 111.1 26 4 M24 28.6 43.5 64 41
40 1 1/2 48.3 180 123.8 30 4 M27 31.8 49.5 70 44
50 2 60.3 215 165.1 26 8 M24 38.1 61.5 105 57
65 2 1/2 76.1 245 190.5 30 8 M27 41.3 77.6 124 64

Frequently Asked Questions (FAQs)

Are slip-on flanges appropriate for underground sewage systems?

Slip-on flanges are not recommended for underground sewage systems. This is due to the required welding process in such a context. According to experts, it is better to use flange adapters. Looking for other more suitable flanges may also work.

Is any specific surface preparation needed before welding slip-on flanges?

For better results, you may thoroughly clean slip-on flange surfaces. This practice ensures that the flange is free of debris or contaminants before welding.

Are slip-on flanges suitable for steam systems?

You may use slip-on flanges for steam piping systems. However, remember that their suitability still depends on the specific pressure and temperature conditions. Before buying slip-on flanges for steam systems, first, verify the application requirements. Consulting relevant standards may also help.

Do slip-on flanges provide a leak-proof connection?

When properly installed and welded, slip-on flanges can provide a secure connection that minimizes the risk of leaks.

What standards govern the use of slip-on flanges?

The installation and testing of slip-on flanges are governed by standards such as ASME B16.5 and ASME B31.3, which specify requirements for dimensions, materials, and pressure ratings

 

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