How do I ensure the quality of the lap joint flanges I purchase?
Source from reputable suppliers or manufacturers with a proven track record.
What is the pressure rating for a stainless steel vanstone flange and how is it determined?
The pressure rating for a stainless steel lap joint flange is determined by the material grade, dimensions, design standards and intended application. The pressure rating for SS lap joint flange is specified by the manufacturer or can be obtained from industry standards.
Can a loose flanges be used with both small and large diameter pipes?
Loose flanges can used with large diameter pipes. They are used in applications where the pipe size exceeds the limitations of standard slip-on or weld neck flanges. Even though it is possible to use a loose flange with a smaller diameter pipe, it may require additional measures. This includes using a reducing adapter or spacer to ensure proper alignment and sealing between the flange and pipe.
Table of content
Lap Joint Flanges
Size
Class
ASTM
ASME
Lapped Joint Flange Specification
Specifications | Lap Joint Flanges |
---|---|
Size | 1/2” to 24” |
Testing | Hydrostatic testing machine Magnetic particle detector Direct-reading Spectrograph UI trasonic flaw detector |
Equipment | Pushing Machine Press machine electric bevelling machine |
Supporting Material For Flanges | Gasket/ Ring Joint/ Flanges Bolts |
Class | Class 150 to Class 2500 |
Transportation In | Air & Ocean and Land |
Methods Of Forging | Casting Forging Rolling Cutting |
Description | Price In US ($) |
---|---|
INC.825, 2 INCH, LAP JOINT FLANGE, 300# | US $1614.41 Per KG |
F316L, 2" LAP JOINT, 1500#, FLANGE | US $188.06 Per KG |
INC.825, 2" LAP JOINT, 150LB | US $1559.44 Per KG |
A350 LF2, 2", LAP JOINT, 2500# | US $2864.28 Per KG |
A350 LF2, 2" LAP JOINT, 300# FLANGE | US $131.16 Per KG |
F316L, 2 1/2", LAP JOINT, 1500# FLANGE | US $2068.65 Per KG |
A105N, 1 1/2, LAP JOINT, 300#, FLANGE | US $50.15 Per KG |
INC.625, 2", LAP JOINT, 300# FLANGE | US $1874.80 Per KG |
A105N, 2" LAP JOINT, 600# FLANGE | US $118.62 Per KG |
INC.825, 2" LAP JOINT, 1500#, FLANGE | US $10731.88 Per KG |
A105N, 1 1/2" LAP JOINT, 150# FLANGE | US $154.30 Per KG |
A350 LF2, 3", LAP JOINT, 600#, FLANGE | US $663.51 Per KG |
F316L, 3", LAP JOINT, CLASS 1500, FLANGE | US $376.11 Per KG |
Types Of Lap Joint Pipe Flanges
Stainless Steel Lap Joint Flanges
Loose Flanges
LJ Flanges
Lapped Joint Flange
Vanstone Flanges
SS 304 Lap Joint Flange
Stainless Steel Vanstone Flange
Raised Face Lap Joint Flange
Carbon Steel Lap Joint Flange
ASTM A105 Lap Joint Flange
Lap Joint Backing Flanges
Flat Face Lap Joint Flanges
ASME B16.5 Lap Joint Flange Dimensions In MM
Class 150 Lap Joint Flanges Dimensions In MM
Size Inches | D In (MM) | X In (MM) | t In (MM) | B3 In (MM) | T3 In (MM) | R° |
---|---|---|---|---|---|---|
1/2 | 89 | 30.2 | 11.2 | 22.9 | 15.7 | 3.0 |
3/4 | 99 | 38.1 | 12.7 | 28.2 | 15.7 | 3.0 |
1 | 108 | 49.3 | 14.2 | 35.1 | 17.5 | 3.0 |
1¼ | 117 | 58.7 | 15.7 | 43.7 | 20.6 | 4.8 |
1½ | 127 | 65.0 | 17.5 | 50.0 | 22.4 | 6.4 |
2 | 152 | 77.7 | 19.1 | 62.5 | 25.4 | 7.9 |
2½ | 178 | 90.4 | 22.4 | 75.4 | 28.4 | 7.9 |
3 | 191 | 108.0 | 23.9 | 91.4 | 30.2 | 9.7 |
3½ | 216 | 122.2 | 23.9 | 104.1 | 31.8 | 9.7 |
4 | 229 | 134.9 | 23.9 | 116.8 | 33.3 | 11.2 |
5 | 254 | 163.6 | 23.9 | 144.5 | 36.6 | 11.2 |
6 | 279 | 192.0 | 25.4 | 171.5 | 39.6 | 12.7 |
8 | 343 | 246.1 | 28.4 | 223.3 | 44.5 | 12.7 |
10 | 406 | 304.8 | 30.2 | 277.4 | 49.3 | 12.7 |
12 | 483 | 365.3 | 31.8 | 328.2 | 55.6 | 12.7 |
14 | 533 | 400.1 | 35.1 | 360.2 | 79.2 | 12.7 |
16 | 597 | 457.2 | 36.6 | 411.2 | 87.4 | 12.7 |
18 | 635 | 505.0 | 39.6 | 462.3 | 96.8 | 12.7 |
20 | 699 | 558.8 | 42.9 | 514.4 | 103.1 | 12.7 |
24 | 813 | 663.4 | 47.8 | 616.0 | 111.3 | 12.7 |
Class 300 Lap Joint Flanges Dimensions In MM
Size Inches | D In (MM) | X In (MM) | t In (MM) | B3 In (MM) | T3 In (MM) | R° |
---|---|---|---|---|---|---|
1/2 | 95 | 38.1 | 14.2 | 22.9 | 22.4 | 3.0 |
3/4 | 117 | 47.8 | 15.7 | 28.2 | 25.4 | 3.0 |
1 | 124 | 53.8 | 17.5 | 35.1 | 26.9 | 3.0 |
1¼ | 133 | 63.5 | 19.1 | 43.7 | 26.9 | 4.8 |
1½ | 155 | 69.9 | 20.6 | 50.0 | 30.2 | 6.4 |
2 | 165 | 84.1 | 22.4 | 62.5 | 33.3 | 7.9 |
2½ | 191 | 100.1 | 25.4 | 75.4 | 38.1 | 7.9 |
3 | 210 | 117.3 | 28.4 | 91.4 | 42.9 | 9.7 |
3½ | 229 | 133.4 | 30.2 | 104.1 | 44.5 | 9.7 |
4 | 254 | 146.1 | 31.8 | 116.8 | 47.8 | 11.2 |
5 | 279 | 177.8 | 35.1 | 144.5 | 50.8 | 11.2 |
6 | 318 | 206.2 | 36.6 | 171.5 | 52.3 | 12.7 |
8 | 381 | 260.4 | 41.1 | 222.3 | 62.0 | 12.7 |
10 | 445 | 320.5 | 47.8 | 277.4 | 66.5 | 12.7 |
12 | 521 | 374.7 | 50.8 | 328.2 | 101.6 | 12.7 |
14 | 584 | 425.5 | 63.8 | 360.2 | 111.3 | 12.7 |
16 | 648 | 482.6 | 57.2 | 411.2 | 120.7 | 12.7 |
18 | 711 | 533.4 | 60.5 | 462.3 | 130.0 | 12.7 |
20 | 775 | 587.2 | 63.5 | 514.4 | 139.7 | 12.7 |
24 | 914 | 701.5 | 69.9 | 616.0 | 152.4 | 12.7 |
Class 600 Lap Joint Flanges Dimensions In MM
Size Inches | D In (MM) | X In (MM) | t In (MM) | B3 In (MM) | T3 In (MM) | R° |
---|---|---|---|---|---|---|
1/2 | 95 | 38.1 | 14.2 | 22.9 | 22.4 | 3.0 |
3/4 | 117 | 47.8 | 15.7 | 28.2 | 25.4 | 3.0 |
1 | 124 | 53.8 | 17.5 | 35.1 | 26.9 | 3.0 |
1¼ | 133 | 63.5 | 20.6 | 43.7 | 28.4 | 4.8 |
1½ | 155 | 69.9 | 22.4 | 50.0 | 31.8 | 6.4 |
2 | 165 | 84.1 | 25.4 | 62.5 | 36.6 | 7.9 |
2½ | 191 | 100.1 | 28.4 | 75.4 | 41.1 | 7.9 |
3 | 210 | 117.3 | 31.8 | 91.4 | 46.0 | 9.7 |
3½ | 229 | 133.4 | 35.1 | 104.1 | 49.3 | 9.7 |
4 | 273 | 152.4 | 38.1 | 116.8 | 53.8 | 11.2 |
5 | 330 | 189.0 | 44.5 | 144.5 | 60.5 | 11.2 |
6 | 356 | 222.3 | 47.8 | 171.5 | 66.5 | 12.7 |
8 | 419 | 273.1 | 55.6 | 222.3 | 76.2 | 12.7 |
10 | 508 | 342.9 | 63.5 | 277.4 | 111.3 | 12.7 |
12 | 559 | 400.1 | 66.5 | 328.2 | 117.3 | 12.7 |
14 | 603 | 431.8 | 69.9 | 360.2 | 127.0 | 12.7 |
16 | 686 | 495.3 | 76.2 | 411.2 | 139.7 | 12.7 |
18 | 743 | 546.1 | 82.6 | 462.3 | 152.4 | 12.7 |
20 | 813 | 609.6 | 88.9 | 514.4 | 165.1 | 12.7 |
24 | 940 | 717.6 | 101.6 | 616.0 | 184.2 | 12.7 |
Class 900 Lap Joint Flanges Dimensions In MM
Size Inches | D In (MM) | X In (MM) | t In (MM) | B3 In (MM) | T3 In (MM) | R° |
---|---|---|---|---|---|---|
1/2 | 121 | 38.1 | 22.4 | 22.9 | 31.8 | 3.0 |
3/4 | 130 | 44.5 | 25.4 | 28.2 | 35.1 | 3.0 |
1 | 149 | 52.3 | 28.4 | 35.1 | 41.1 | 3.0 |
1¼ | 159 | 63.5 | 28.4 | 43.7 | 41.1 | 4.8 |
1½ | 178 | 69.9 | 31.8 | 50.0 | 44.5 | 6.4 |
2 | 216 | 104.6 | 38.1 | 62.5 | 57.2 | 7.9 |
2½ | 244 | 124.0 | 41.1 | 75.4 | 63.5 | 7.9 |
3 | 241 | 127.0 | 38.1 | 91.4 | 53.8 | 9.7 |
4 | 292 | 158.8 | 44.5 | 116.8 | 69.9 | 11.2 |
5 | 349 | 190.5 | 50.8 | 144.5 | 79.2 | 11.2 |
6 | 381 | 235.0 | 55.6 | 171.5 | 85.9 | 12.7 |
8 | 470 | 298.5 | 63.5 | 222.3 | 114.3 | 12.7 |
10 | 546 | 368.3 | 69.9 | 277.4 | 127.0 | 12.7 |
12 | 610 | 419.1 | 79.2 | 328.2 | 142.7 | 12.7 |
14 | 641 | 450.9 | 85.9 | 360.2 | 155.4 | 12.7 |
16 | 705 | 508.0 | 88.9 | 411.2 | 165.1 | 12.7 |
18 | 787 | 565.2 | 101.6 | 42.3 | 190.5 | 12.7 |
20 | 857 | 622.3 | 108.0 | 514.4 | 209.6 | 12.7 |
24 | 1041 | 749.3 | 139.7 | 616.0 | 266.7 | 12.7 |
Class 1500 Lap Joint Flanges Dimensions In Inch
Normal Pipe Size In Inch | ID In Inch | OD In Inch | Bolt Circle In Inch | Raised Face (R) In Inch | R/F In Inch | H In Inch | R/F Thickness (T) In Inch | T1 In Inch | F/F Thickness (T2) In Inch | Bolt Hole (B) In Inch | Number of Bolts Holes |
---|---|---|---|---|---|---|---|---|---|---|---|
1/2 | 0.88 | 4.75 | 3.25 | 1.38 | .250 | 1.50 | 1.50 | 0.88 | 1.25 | 0.88 | 4 |
3/4 | 1.09 | 5.13 | 3.50 | 1.69 | .250 | 1.75 | 1.63 | 1.00 | 1.38 | 0.88 | 4 |
1 | 1.36 | 5.88 | 4.00 | 2.00 | .250 | 2.06 | 1.88 | 1.13 | 1.63 | 1.00 | 4 |
1-1/4 | 1.70 | 6.25 | 4.38 | 2.50 | .250 | 2.50 | 1.88 | 1.13 | 1.63 | 1.00 | 4 |
1-1/2 | 1.95 | 7.00 | 4.88 | 2.88 | .250 | 2.75 | 2.00 | 1.25 | 1.75 | 1.13 | 4 |
2 | 2.44 | 8.50 | 6.50 | 3.63 | .250 | 4.13 | 2.50 | 1.50 | 2.25 | 1.00 | 8 |
2-1/2 | 2.94 | 9.63 | 7.50 | 4.13 | .250 | 4.88 | 2.75 | 1.63 | 2.50 | 1.13 | 8 |
3 | 3.57 | 10.50 | 8.00 | 5.00 | .250 | 5.25 | 3.13 | 1.88 | 2.88 | 1.25 | 8 |
4 | 4.57 | 12.25 | 9.50 | 6.19 | .250 | 6.38 | 3.81 | 2.13 | 3.56 | 1.38 | 8 |
5 | 5.66 | 14.75 | 11.50 | 7.31 | .250 | 7.75 | 4.38 | 2.88 | 4.13 | 1.63 | 8 |
6 | 6.72 | 15.50 | 12.50 | 8.50 | .250 | 9.00 | 4.94 | 3.25 | 4.69 | 1.50 | 12 |
8 | 8.72 | 19.00 | 15.50 | 10.63 | .250 | 11.50 | 5.88 | 3.63 | 5.63 | 1.75 | 12 |
10 | 10.88 | 23.00 | 19.00 | 12.75 | .250 | 14.50 | 6.50 | 4.25 | 6.25 | 2.00 | 12 |
12 | 12.88 | 26.50 | 22.50 | 15.00 | .250 | 17.75 | 7.38 | 4.88 | 7.13 | 2.13 | 16 |
Class 2500 Lap Joint Flanges Dimensions In Inch
Normal Pipe Size In Inch | ID In Inch | OD In Inch | Bolt Circle In Inch | H In Inch | T1 In Inch | T2 In Inch | RA In Inch | Bolt Hole (B) In Inch | Number of Bolts Holes |
---|---|---|---|---|---|---|---|---|---|
1/2 | 0.90 | 5.25 | 3.50 | 1.69 | 1.19 | 1.56 | .12 | 0.88 | 4 |
3/4 | 1.11 | 5.50 | 3.75 | 2.00 | 1.25 | 1.69 | .12 | 0.88 | 4 |
1 | 1.38 | 6.25 | 4.25 | 2.25 | 1.38 | 1.88 | .12 | 1.00 | 4 |
1-1/4 | 1.72 | 7.25 | 5.13 | 2.88 | 1.50 | 2.06 | .19 | 1.13 | 4 |
1-1/2 | 1.97 | 8.00 | 5.75 | 3.13 | 1.75 | 2.38 | .25 | 1.25 | 4 |
2 | 2.46 | 9.25 | 6.75 | 3.75 | 2.00 | 2.75 | .31 | 1.13 | 8 |
2-1/2 | 2.97 | 10.50 | 7.75 | 4.50 | 2.25 | 3.13 | .31 | 1.25 | 8 |
3 | 3.60 | 12.00 | 9.00 | 5.25 | 2.63 | 3.63 | .38 | 1.38 | 8 |
4 | 4.60 | 14.00 | 10.75 | 6.50 | 3.00 | 4.25 | .44 | 1.63 | 8 |
5 | 5.69 | 16.50 | 12.75 | 8.00 | 3.63 | 5.13 | .44 | 1.88 | 8 |
6 | 6.75 | 19.00 | 14.50 | 9.25 | 4.25 | 6.00 | .50 | 2.13 | 8 |
8 | 8.75 | 21.75 | 17.25 | 12.00 | 5.00 | 7.00 | .50 | 2.13 | 12 |
10 | 10.92 | 26.50 | 21.25 | 14.75 | 6.50 | 9.00 | .50 | 2.63 | 12 |
12 | 12.92 | 30.00 | 24.38 | 17.38 | 7.25 | 10.00 | .50 | 2.88 | 12 |
LJ Flanges Temperature Ratings
Temperature (Dedgree C) | Class Of Flanges | ||||||
---|---|---|---|---|---|---|---|
(150#) | (300#) | (400#) | (600#) | (900#) | (1500#) | (2500#) | |
-29 - 38 | 19.8 | 51.7 | 68.9 | 103.4 | 155 | 259 | 431 |
50 | 19.5 | 51.7 | 68.9 | 103.4 | 155 | 259 | 431 |
100 | 17.7 | 51.5 | 68.7 | 103.0 | 155 | 258 | 429 |
150 | 15.8 | 50.2 | 66.8 | 100.3 | 151 | 251 | 418 |
200 | 13.8 | 48.6 | 64.8 | 97.2 | 146 | 243 | 405 |
250 | 12.1 | 46.3 | 61.7 | 92.7 | 139 | 232 | 386 |
300 | 10.2 | 42.9 | 57.0 | 85.7 | 129 | 214 | 357 |
325 | 9.3 | 41.4 | 55.0 | 82.6 | 124 | 207 | 344 |
350 | 8.4 | 40.0 | 53.4 | 80.0 | 120 | 200 | 334 |
375 | 7.4 | 37.8 | 50.4 | 75.7 | 114 | 189 | 315 |
400 | 6.5 | 34.7 | 46.3 | 69.4 | 104 | 174 | 290 |
425 | 5.5 | 28.8 | 38.4 | 57.5 | 86.3 | 144 | 240 |
450 | 4.6 | 23.0 | 30.7 | 46.0 | 69.0 | 115 | 192 |
475 | 3.7 | 17.1 | 22.8 | 34.2 | 51.3 | 85.4 | 142 |
500 | 2.8 | 11.6 | 15.4 | 23.2 | 34.7 | 57.9 | 96.5 |
538 | 1.4 | 5.9 | 7.9 | 11.8 | 17.7 | 29.5 | 49.2 |
Lap Joint Flange Gasket Dimensions
Normal Pipe Size In Inch | (I.D.) Gasket | (O.D.) Gasket | ||||
---|---|---|---|---|---|---|
Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | ||
1/2 | 0.84 | 1.875 | 2.125 | 2.125 | 2.125 | 2.50 |
3/4 | 1.06 | 2.25 | 2.625 | 2.625 | 2.625 | 2.75 |
1 | 1.31 | 2.625 | 2.875 | 2.875 | 2.875 | 3.125 |
1 1/4 | 1.66 | 3 | 3.25 | 3.25 | 3.25 | 3.50 |
1 1/2 | 1.91 | 3.375 | 3.75 | 3.75 | 3.75 | 3.875 |
2 | 2.38 | 4.125 | 4.375 | 4.375 | 4.375 | 5.625 |
2 1/2 | 2.88 | 4.875 | 5.125 | 5.125 | 5.125 | 6.50 |
3 | 3.50 | 5.375 | 5.875 | 5.875 | 5.875 | 6.625 |
4 | 4.50 | 6.875 | 7.125 | 7.00 | 7.625 | 8.125 |
5 | 5.56 | 7.75 | 8.50 | 8.375 | 9.50 | 9.75 |
6 | 6.62 | 8.75 | 9.875 | 9.75 | 10.50 | 11.375 |
8 | 8.62 | 11 | 12.125 | 12.00 | 12.625 | 14.125 |
10 | 10.75 | 13.375 | 14.25 | 14.125 | 15.75 | 17.125 |
Stud Bolt Length For Lap Joint Flange
CLass | 150# | 300# | 600# | 900# | 1500# | 2500# |
Dia. Of (A) | 305 | 321 | 345 | 368 | 368 | 375 |
Dia. Of (D) |
405 | 445 | 510 | 545 | 585 | 675 |
Wall Thickness Of (B) |
30.2 | 47.7 | 63.5 | 69.9 | 108 | 165.1 |
Dia. Of K |
362 | 387.4 | 431.8 | 469.9 | 482.6 | 539.8 |
Hight | 49 | 95 | 111 | 127 | 178 | 229 |
Nimber L |
12 | 16 | 16 | 16 | 12 | 12 |
Dia. L |
25.4 | 28.6 | 34.9 | 38.1 | 50.8 | 66.7 |
Stud Bolts Dia. And Length | ||||||
Dia. In (Inch) |
7/8 | 1 | 1.1/4 | 1.3/8 | 1.7/8 | 2.1/2 |
Length In millimeter |
115 | 160 | 215 | 235 | 335 | 490 |
Facing Types Of Carbon Steel Lap Joint Flange
Facing Types
Stainless Steel Lap Joint Flanges Weight Chart
Nominal Pipe Size | Lap Joint |
---|---|
½ | 1 |
¾ | 2 |
1 | 2 |
1¼ | 3 |
1½ | 3 |
2 | 5 |
2½ | 8 |
3 | 9 |
3½ | 11 |
4 | 13 |
5 | 15 |
6 | 19 |
8 | 30 |
10 | 43 |
12 | 64 |
14 | 105 |
16 | 140 |
18 | 160 |
20 | 195 |
22 | 245 |
24 | 275 |
Size | D1 | D2 | D3 | d | d1 | d2 | H | T | I | n-Øe |
---|---|---|---|---|---|---|---|---|---|---|
2” | 5.99 | 4.77 | 2.99 | 2.01 | 2.37 | 2.39 | 1.69 | 0.19 | 1.50 | |
3” | 7.56 | 5.99 | 4.26 | 3.03 | 3.49 | 3.52 | 2.13 | 1.02 | 1.88 | |
4” | 9.02 | 7.53 | 5.24 | 4.02 | 4.49 | 4.52 | 2.52 | 1.10 | 2.25 | |
6” | 11.19 | 9.50 | 7.53 | 6.15 | 6.62 | 6.66 | 3.35 | 1.26 | 3.00 | |
8” | 13.51 | 11.74 | 9.38 | 8.04 | 8.62 | 8.67 | 4.65 | 1.42 | 4.02 | |
10” | 16.00 | 14.26 | 12.21 | 10.09 | 10.75 | 10.80 | 5.91 | 1.65 | 4.85 |
What are the different sizes and schedule of LJ flange available in the market?
LJ flanges are available in various sizes and schedules to suit various piping system requirements. Common sizes for lapped flange ranges from small diameters like ½" or 1", to larger sizes like 60" or higher. The available schedules include standard options such as Sch 10,40,80 and others.
What are the best practices for testing and inspecting carbon steel lap joint flanges?
Testing and inspecting carbon steel lap joint flanges involves following best practices to ensure their quality and reliability. This includes visual inspections for surface defects, dimensional checks and non-destructive tests. Mechanical tests like hardness testing may also be requested by the client. Adhering to industry standards and guidelines helps ensure proper testing and inspection procedures.
What are the testing requirements for stainless steel lap joint flange?
The testing requirements for stainless steel vanstone flange may vary with industry standards and project specifications. You can consult manufacturer guidelines to determine the specific testing requirements.