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Steber Steel Solutions

Lapped Joint Flange

Lapped Joint Flange

Table of Contents

Refer Connection Types of LJRF Flange

Connection Types
Socket Weld (SW) Connection Butt Weld (BW) Connection
Lap Joint (LJ) Connection Slip-On (SO) Connection
Threaded (THD) Connection Ring Type Joint (RTJ) Connection
 

LJF flange are available in Raised and Flat Face Types

  • Male And Female
  • Tongue And Groove
  • Lap Joint
  • Raised Face
  • Flat Face
  • Ring Joint
 

Lap Joint Flanges Are Manufactured According to ASME B16.5 Standards

Manufacturing Techniques
Plate
Forged
Cast
 

Lap Joint Flange Types

Lap Joint Flange Types

Lapped Joint Flange American Standards

  • ASME B16.47
  • ASME B16.5
Pressure Rating range of SS Lap Joint Flange is between 150# to 2500#
Service Temperature (°F) 2500# Pressure Rating (psi) 1500# Pressure Rating (psi) 900# Pressure Rating (psi) 600# Pressure Rating (psi) 300# Pressure Rating (psi) 150# Pressure Rating (psi)
100 6160 3700 2220 1480 720 275
950 3215 1925 1155 770 385 35
200 5080 3050 1830 1220 610 235
900 3375 2025 1215 810 405 50
300 4550 2730 1635 1090 545 210
850 3410 2050 1230 820 410 65
400 4125 2475 1485 990 495 190
800 3450 2075 1245 830 415 80
500 3830 2300 1380 920 460 170
750 3450 2075 1245 830 415 95
600 3625 2175 1305 870 435 140
700 3500 2100 1260 840 420 110
650 3580 2150 1290 860 430 125
 
Lap Joint Pipe Flange are widely used in low-pressure Applications
SS Lap Joint Applications  

Lap Joint Flange Welding Process

Welding Process Technique
Material Specific Welding MIG or TIG
Welding Stub End to Lap Joint Flange Fillet Weld : MIG or TIG
Welding Stub End to Pipe Butt Weld : TIG, SMAW , MIG
Post Weld Heat Treatment PWHT
Inspection NDT or Visual
 

Lap Joint Flange Installation

Lap Joint Flange Installation  

ANSI B16.5 Lap Joint Flangs BS Standard

  • BS 10
  • BS 4504 (PN 40 to PN 2.5 )

Lap Joint Flange Raised Face DIN Standard

  • DIN 2655 PN25
  • DIN 2642 PN10
  • DIN 2656 PN40
  • DIN 2653 PN10
  • DIN 2642

Lap Joint Flange ANSI B16.5 Bolt Chart

Size in Inch RF Stud Length No of Bolts
1 1/2 110 4
12 220 20
1 90 4
5 165 8
1 1/4 95 4
8 190 12
2 110 8
14 235 20
2 1/2 120 8
18 275 20
3 125 8
24 330 24
3 1/2 140 8
4 145 8
16 255 20
6 170 12
20 285 24
10 215 16
 

JIS Standards of Lap Joint Pipe Flange

  • UNI 2299
  • UNI 6088
  • UNI 2300
  • UNI 6090
  • UNI 6089

PN16 Loose Joint Flange Weight

Size In Millimeter Normal Size Of Steel Pipe In Inches ASME B16.5 Lap Joint Flange
Wall Thickness Of
(D)
In (M)		 ASME B16.5 Lap Joint Flange
Outer Daimeter (O.D.) In
(MM)
 ASME B16.5 Lap Joint Pipe Flange
100 4 23.9 228.6 5.3
15 1/2 11.2 88.9 0.4
300 12 31.8 482.6 26.2
20 3/4 12.7 98.6 0.6
350 14 35.1 533.4 34.6
25 1 14.2 108 0.8
400 16 36.6 596.9 44.8
32 1 1/4 15.7 117.3 1
200 8 28.4 342.9 12.1
40 1 1/2 17.5 127 1.3
450 18 39.6 635 48.9
50 2 19.1 152.4 2.1
65 2 1/2 22.4 177.8 3.3
250 10 30.2 406.4 16.5
80 3 23.9 190.5 3.9
150 6 25.4 279.4 7.5
90 3 1/2 23.9 215.9 4.8
500 20 42.9 698.5 61.9
125 5 23.9 254 6.1
 

Lapped Joint Flange UNI Standard

  • KS1503
  • JIS B2220
  • KS B1522
  • KS B1543
  • JIS B2312
  • JIS B2311
  • KS B1541

SS Lap Joint Flange Dimensions Class 150t

Normal Size Of Steel Pipe in MM Normal Size Of Steel Pipe In Inch (WT) O.D. Inner Daimeter Lapped Thickness LJ Bolts Number Lap Joint Radius Length Of Machine Bolt Bolts Size In UNC Lap Joint Flange Bolts Hole Size Length Of (RF) Stud
B A D C
100 4 135 230 116.8 33 8 11 75 5/8 3/4 90
15 1/2 30 90 22.9 16 4 3 50 1/2 5/8 55
250 10 305 405 277.4 49 12 13 100 7/8 1 115
20 3/4 38 100 28.2 16 4 3 50 1/2 5/8 65
125 5 164 255 144.4 36 8 11 85 3/4 7/8 95
400 16 457 595 411.2 87 16 13 115 1 1 1/8 135
25 1 49 110 34.9 17 4 3 55 1/2 5/8 65
350 14 400 535 360.2 79 12 13 115 1 1 1/8 135
32 1 1/4 59 115 43.7 21 4 5 55 1/2 5/8 70
300 12 365 485 328.2 56 12 13 100 7/8 1 120
40 1 1/2 65 125 50 22 4 6 65 1/2 5/8 70
450 18 505 635 462.3 97 16 13 125 1 1/8 1 1/4 145
50 2 78 150 62.5 25 4 8 70 5/8 3/4 85
500 20 559 700 514.4 103 20 13 140 1 1/8 1 1/4 160
65 2 1/2 90 180 75.4 29 4 8 75 5/8 3/4 90
200 8 246 345 222.2 44 8 13 90 3/4 7/8 110
80 3 108 190 91.4 30 4 10 75 5/8 3/4 90
600 24 663 815 616 111 20 13 150 1 1/4 1 3/8 170
90 3 1/2 122 215 104.1 32 8 11 75 5/8 3/4 90
150 6 192 280 171.4 40 8 13 85 3/4 7/8 100
 

Lap Joint Pipe Flange Dimensions Class 300

Normal Size Of Steel Pipe In Inch Normal Size Of Steel Pipe in MM (WT) O.D. Inner Daimeter Lapped Thickness PCD LJ Bolts Number Lap Joint Radius Lapped Thickness Length Of Machine Bolt Lap Joint Flange Bolts Hole Size Bolts Size In UNC ISO Stud Size Length Of (RF) Stud Weight In Kilogram (KG)
B A D C E G
10 250 321 445 277.4 95 387.4 16 13 47.7 140 1 1/8 1 M27 160 36
3/4 20 48 115 28.2 25 82.6 4 3 15.9 65 3/4 5/8 M16 75 1.4
6 150 206 320 171.4 52 269.9 12 13 36.6 110 7/8 3/4 M20 120 17.7
24 600 702 915 616 153 812.8 24 13 69.9 205 1 5/8 1 1/2 M39 230 216
1 25 54 125 34.9 27 88.9 4 3 17.5 65 3/4 5/8 M16 75 1.4
14 350 425 585 360.2 111 514.4 20 13 54 160 1 1/4 1 1/8 M30 180 75
2 50 84 165 62.5 33 127 8 8 22.3 75 3/4 5/8 M16 90 3.2
16 400 483 650 411.2 121 571.5 20 13 57.2 165 1 3/8 1 1/4 M33 190 86
3 80 117 210 91.4 43 168.3 8 10 28.6 90 7/8 3/4 M20 110 5.9
18 450 533 710 462.3 130 628.6 24 13 60.4 170 1 3/8 1 1/4 M33 195 113
4 100 146 255 116.8 48 200 8 11 31.8 95 7/8 3/4 M20 115 10
20 500 587 775 514.4 140 685.8 24 13 63.5 185 1 3/8 1 1/4 M33 205 143
5 125 178 280 144.4 51 235 8 11 35 110 7/8 3/4 M20 120 12.7
8 200 260 380 222.2 62 330.2 12 13 41.3 120 1 7/8 M24 140 26
12 300 375 520 328.2 102 450.8 16 13 50.8 145 1 1/4 1 1/8 M30 170 52