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- Cangzhou, Hebei Province, China
A lap joint flange (LJF flange) is also called loose flange, it has two components, a stub end and a loose backing flange. Stub end is butt welded to the pipe and backing flanges freely moves over the pipe. LJF flange is particularly used for frequent dismantling or hard-to-adjust pipe connection.
Manufactured with advanced CNC equipment and proven processes, our flanges, pipe bends, and fittings deliver accurate dimensions, stable sealing performance, and dependable installation across demanding industrial applications.
Is a solid manufacturer, supplier, stockiest of steel Flanges in China. We can manufacture high quality blind flanges according to international standards, such as ASME/ ANSI B16.5 flanges, ASME/ ANSI B16.47 flanges, JIS flanges, DIN flanges, EN 1092-1 flanges, AWWA flanges, BS 4504 flanges, SABS/ ASNA 1123 flanges, etc., We are an ISO, KR, KS and PED/AD 2000 certified factory and can meet the demanding requirements of the most critical industries.
Dimensions of carbon steel lap joint flanges:
ASME/ANSI: DN 1/2” – DN 24”
DIN: DN 15 – DN 2000
EN1092: DN 15 – DN 2000
JIS: 15A-1500A
UNI: DN 10 – DN 2000
SABS: DN 10-DN 600
GOST: DN 10 – DN 1600
Pressure of carbon steel lapped flanges:
ASME/ANSI: Class 150, 300, 600, 900, 1500 2500lbs
DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
EN1092: PN6, PN10, PN16, PN25, PN40, PN64, PN100
JIS: 1K,2K,5K,10K,16K,20K,30K,40K
UNI: PN6, PN10, PN16, PN25, PN40
SABS: 600KPA,1000,1600,2500,4000
GOST: PN6, PN10, PN16, PN25
Material of steel lap joint flanges:
Carbon steel lapped flanges: A105, SS400, SF440 RST37.2, S235JRG2, P250GH, C22.8, etc.
Stainless Steel lapped flanges: ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L
DIN2642 Vorschweißflansche/Lose Flange
| DIN 2641 PN 6 Lose Flansche Glatte Bunde | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rohranschlussmaße | Flansch | Schrauben | Bund und Bördel | Gewicht KG | |||||||||||||||
| d1 | D | d6 | b | k | e | Anzahl | Gewinde | d2 | d5 | h3 | d4 | h4 | s1 | s2 | r | ||||
| DN | Reihe 1 | Reihe 2 | max. | min. | min. | min | Flansch | Bund | |||||||||||
| 10 | 14,0 | 75 | 16 | 10 | 50 | 2 | 4 | M10 | 11 | 14,5 | 8 | 35 | 9 | 1,8 | 3,0 | 2 | 0.298 | 0.051 | |
| 10 | 17,2 | 75 | 19 | 10 | 50 | 2 | 4 | M10 | 11 | 17,7 | 8 | 35 | 9 | 1,8 | 3,0 | 2 | 0.298 | 0.051 | |
| 15 | 20,0 | 80 | 22 | 10 | 55 | 2 | 4 | M10 | 11 | 21,0 | 8 | 40 | 9 | 2,0 | 3,0 | 2 | 0.337 | 0.063 | |
| 15 | 21,3 | 80 | 24 | 10 | 55 | 2 | 4 | M10 | 11 | 22,0 | 8 | 40 | 9 | 2,0 | 3,0 | 2 | 0.337 | 0.063 | |
| 20 | 25,0 | 90 | 28 | 10 | 65 | 2 | 4 | M10 | 11 | 26,0 | 10 | 50 | 12 | 2,0 | 3,0 | 2 | 0.418 | 0.116 | |
| 20 | 26,9 | 90 | 30 | 10 | 65 | 2 | 4 | M10 | 11 | 27,6 | 10 | 50 | 12 | 2,0 | 3,0 | 2 | 0.418 | 0.116 | |
| 25 | 30,0 | 100 | 33 | 12 | 75 | 3 | 4 | M10 | 11 | 31,0 | 10 | 60 | 15 | 2,0 | 3,0 | 3 | 0.620 | 0.166 | |
| 25 | 33,7 | 100 | 36 | 12 | 75 | 3 | 4 | M10 | 11 | 34,4 | 10 | 60 | 15 | 2,0 | 3,0 | 3 | 0.620 | 0.166 | |
| 32 | 38,0 | 120 | 42 | 12 | 90 | 3 | 4 | M12 | 14 | 39,0 | 10 | 70 | 15 | 2,6 | 3,5 | 3 | 0.874 | 0.213 | |
| 32 | 42,4 | 120 | 46 | 12 | 90 | 3 | 4 | M12 | 14 | 43,1 | 10 | 70 | 15 | 2,6 | 3,5 | 3 | 0.874 | 0.213 | |
| 40 | 44,5 | 130 | 50 | 12 | 100 | 3 | 4 | M12 | 14 | 45,5 | 10 | 80 | 17 | 2,6 | 3,5 | 3 | 1.01 | 0.273 | |
| 40 | 48,3 | 130 | 54 | 12 | 100 | 3 | 4 | M12 | 14 | 49,0 | 10 | 80 | 17 | 2,6 | 3,5 | 3 | 1.01 | 0.273 | |
| 50 | 57,0 | 140 | 62 | 12 | 110 | 3 | 4 | M12 | 14 | 58,1 | 12 | 90 | 23 | 2,6 | 3,5 | 3 | 1.12 | 0.359 | |
| 50 | 60,3 | 140 | 65 | 12 | 110 | 3 | 4 | M12 | 14 | 61,1 | 12 | 90 | 23 | 2,6 | 3,5 | 3 | 1.12 | 0.359 | |
| 65 | 76,1 | 160 | 81 | 12 | 130 | 3 | 4 | M12 | 14 | 77,1 | 12 | 110 | 23 | 2,6 | 3,5 | 3 | 1.35 | 0.468 | |
| 80 | 88,9 | 190 | 94 | 14 | 150 | 3 | 4 | M16 | 18 | 90,3 | 14 | 128 | 23 | 3,2 | 4,0 | 3 | 2.24 | 0.730 | |
| 100 | 108,0 | 210 | 113 | 14 | 170 | 3 | 4 | M16 | 18 | 109,6 | 14 | 148 | 28 | 3,2 | 4,0 | 3 | 2.59 | 0.884 | |
| 100 | 114,3 | 210 | 119 | 14 | 170 | 3 | 4 | M16 | 18 | 115,9 | 14 | 148 | 28 | 3,2 | 4,0 | 3 | 2.59 | 0.884 | |
| 125 | 133,0 | 240 | 138 | 14 | 200 | 3 | 8 | M16 | 18 | 134,8 | 14 | 178 | 30 | 3,2 | 4,0 | 3 | 3.10 | 1.21 | |
| 125 | 139,7 | 240 | 145 | 14 | 200 | 3 | 8 | M16 | 18 | 141,6 | 14 | 178 | 30 | 3,2 | 4,0 | 3 | 3.10 | 1.21 | |
| 150 | 159,0 | 265 | 164 | 14 | 225 | 3 | 8 | M16 | 18 | 161,1 | 14 | 202 | 30 | 3,2 | 4,0 | 3 | 3.52 | 1.34 | |
| 150 | 168,3 | 265 | 173 | 14 | 225 | 3 | 8 | M16 | 18 | 170,5 | 14 | 202 | 30 | 3,2 | 4,0 | 3 | 3.52 | 1.34 | |
| 200 | 219,1 | 320 | 225 | 16 | 280 | 3 | 8 | M16 | 18 | 221,8 | 16 | 258 | 30 | 3,2 | 4,0 | 3 | 4.98 | 2 | |
| 250 | 267,0 | 375 | 273 | 20 | 335 | 3 | 12 | M16 | 18 | 270,2 | 18 | 312 | 30 | 4,0 | 5,0 | 3 | 7.67 | 2.89 | |
| 250 | 273,0 | 375 | 279 | 20 | 335 | 3 | 12 | M16 | 18 | 276,2 | 18 | 312 | 30 | 4,0 | 5,0 | 3 | 7.67 | 2.89 | |
| 300 | 323,9 | 440 | 329 | 24 | 395 | 4 | 12 | M 20 | 22 | 327,6 | 18 | 365 | 35 | 4,0 | 5,0 | 4 | 12.3 | 3.56 | |
| 350 | 355,6 | 490 | 362 | 26 | 445 | 4 | 12 | M 20 | 22 | 359,7 | 18 | 415 | 4 | 15.1 | 4.08 | ||||
| 350 | 368,0 | 490 | 374 | 26 | 445 | 4 | 12 | M 20 | 22 | 372,2 | 18 | 415 | 4 | 15.1 | 4.08 | ||||
| 400 | 406,4 | 540 | 413 | 28 | 495 | 4 | 16 | M 20 | 22 | 411,0 | 20 | 465 | 4 | 17.7 | 4.91 | ||||
| 400 | 419,0 | 540 | 426 | 28 | 495 | 4 | 16 | M 20 | 22 | 423,7 | 20 | 465 | 4 | 17.7 | 4.91 | ||||
| 500 | 508,0 | 521,0 | 645 | 517 | 32 | 600 | 4 | 20 | M 20 | 22 | 513,6 | 22 | 570 | 4 | 25.4 | 7.39 | |||
| 600 | 610,0 | 620,0 | 755 | 618 | 36 | 705 | 4 | 20 | M24 | 26 | 616,6 | 22 | 670 | 4 | 36.3 | 8.60 | |||
| 700 | 711,0 | 720,0 | 860 | 721 | 40 | 810 | 4 | 24 | M24 | 26 | 718,6 | 24 | 775 | 4 | 48.1 | 14 | |||
| 800 | 813,0 | 820,0 | 975 | 824 | 44 | 920 | 4 | 24 | M27 | 30 | 821,5 | 24 | 880 | 4 | 66.5 | 16.8 | |||
| 900 | 914,4 | 1075 | 926 | 48 | 1020 | 4 | 24 | M27 | 30 | 923.5 | 26 | 980 | 4 | 81.3 | 20.1 | ||||
| 1000 | 1016 | 1175 | 1028 | 52 | 1120 | 4 | 28 | M27 | 30 | 1026.7 | 26 | 1080 | 4 | 96.4 | 21.5 | ||||
| 1200 | 1220 | 1405 | 1232 | 60 | 1340 | 5 | 32 | M30 | 33 | 1232.7 | 28 | 1295 | 6 | 158 | 32.6 | ||||
| DIN 2642 PN 10 Lose Flansche Glatte Bunde | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rohranschlussmaße | Flansch | Schrauben | Bund und Bördel | Gewicht KG | |||||||||||||||
| d1 | D | d6 | b | k | e | Anzahl | Gewinde | d2 | d5 | h3 | d4 | h4 | s1 | s2 | r | ||||
| DN | Reihe 1 | Reihe 2 | max. | min. | min. | min | Flansch | Bund | |||||||||||
| 10 | 14,0 | 90 | 16 | 14 | 60 | 3 | 4 | M12 | 14 | 14,5 | 10 | 40 | 9 | 1,8 | 3,0 | 3 | 0.559 | 0.087 | |
| 10 | 17,2 | 90 | 19 | 14 | 60 | 3 | 4 | M 12 | 14 | 17,7 | 10 | 40 | 9 | 1,8 | 3,0 | 3 | 0.559 | 0.087 | |
| 15 | 20,0 | 95 | 22 | 14 | 65 | 3 | 4 | M12 | 14 | 21,0 | 10 | 45 | 9 | 2,0 | 3,0 | 3 | 0.689 | 0.105 | |
| 15 | 21,3 | 95 | 24 | 14 | 65 | 3 | 4 | M 12 | 14 | 22,0 | 10 | 45 | 9 | 2,0 | 3,0 | 3 | 0.689 | 0.105 | |
| 20 | 25,0 | 105 | 28 | 14 | 75 | 3 | 4 | M12 | 14 | 26,0 | 12 | 58 | 12 | 2,0 | 3,0 | 3 | 0.806 | 0.203 | |
| 20 | 26,9 | 105 | 30 | 16 | 75 | 3 | 4 | M 12 | 14 | 27,6 | 12 | 58 | 12 | 2,0 | 3,0 | 3 | 0.806 | 0.203 | |
| 25 | 30,0 | 115 | 33 | 16 | 85 | 4 | 4 | M 12 | 14 | 31,0 | 12 | 68 | 15 | 2,0 | 3,0 | 4 | 1.110 | 0.276 | |
| 25 | 33,7 | 115 | 36 | 16 | 85 | 4 | 4 | M12 | 14 | 34,4 | 12 | 68 | 15 | 2,0 | 3,0 | 4 | 1.110 | 0.276 | |
| 32 | 38,0 | 140 | 42 | 16 | 100 | 4 | 4 | M 16 | 18 | 39,0 | 12 | 78 | 15 | 2,6 | 3,5 | 4 | 1.640 | 0.343 | |
| 32 | 42,4 | 140 | 46 | 16 | 100 | 4 | 4 | M16 | 18 | 43,1 | 12 | 78 | 15 | 2,6 | 3,5 | 4 | 1.640 | 0.343 | |
| 40 | 44,5 | 150 | 50 | 16 | 110 | 4 | 4 | M16 | 18 | 45,5 | 12 | 88 | 17 | 2,6 | 3,5 | 4 | 1.860 | 0.426 | |
| 40 | 48,3 | 150 | 54 | 16 | 110 | 4 | 4 | M16 | 18 | 49,0 | 12 | 88 | 17 | 2,6 | 3,5 | 4 | 1.860 | 0.426 | |
| 50 | 57,0 | 165 | 62 | 16 | 125 | 5 | 4 | M 16 | 18 | 58,1 | 18 | 102 | 23 | 2,6 | 3,5 | 5 | 2.200 | 0.618 | |
| 50 | 60,3 | 165 | 65 | 16 | 125 | 5 | 4 | M16 | 18 | 61,1 | 18 | 102 | 23 | 2,6 | 3,5 | 5 | 2.200 | 0.618 | |
| 65 | 76,1 | 185 | 81 | 16 | 145 | 5 | 4 | M16 | 18 | 77,1 | 18 | 122 | 23 | 2,6 | 3,5 | 5 | 2.620 | 0.786 | |
| 80 | 88,9 | 200 | 94 | 18 | 160 | 5 | 8 | M16 | 18 | 90,3 | 18 | 138 | 23 | 3,2 | 4,0 | 5 | 3.320 | 1.100 | |
| 100 | 108,0 | 220 | 113 | 18 | 180 | 5 | 8 | M 16 | 18 | 109,6 | 18 | 158 | 28 | 3,2 | 4,0 | 5 | 3.670 | 1.310 | |
| 100 | 114,3 | 220 | 119 | 18 | 180 | 5 | 8 | M16 | 18 | 115,9 | 18 | 158 | 28 | 3,2 | 4,0 | 5 | 3.670 | 1.310 | |
| 125 | 133,0 | 250 | 138 | 18 | 210 | 5 | 8 | M16 | 18 | 134,8 | 18 | 188 | 30 | 3,2 | 4,0 | 5 | 4.540 | 1.960 | |
| 125 | 139,7 | 250 | 145 | 18 | 210 | 5 | 8 | M 16 | 18 | 141,6 | 18 | 188 | 30 | 3,2 | 4,0 | 5 | 4.540 | 1.960 | |
| 150 | 159,0 | 285 | 164 | 18 | 240 | 5 | 8 | M 20 | 22 | 161,1 | 22 | 212 | 30 | 3,2 | 4,0 | 5 | 5.600 | 2.180 | |
| 150 | 168,3 | 285 | 173 | 18 | 240 | 5 | 8 | M 20 | 22 | 170,5 | 22 | 212 | 30 | 3,2 | 4,0 | 5 | 5.600 | 2.180 | |
| 200 | 219,1 | 340 | 225 | 20 | 295 | 5 | 8 | M 20 | 22 | 221,8 | 22 | 268 | 30 | 3,2 | 4,0 | 5 | 7.460 | 3.100 | |
| 250 | 267,0 | 395 | 273 | 22 | 350 | 5 | 12 | M 20 | 22 | 270,2 | 22 | 320 | 30 | 4,0 | 5,0 | 5 | 10.300 | 4.220 | |
| 250 | 273,0 | 395 | 279 | 22 | 350 | 5 | 12 | M 20 | 22 | 276,2 | 22 | 320 | 30 | 4,0 | 5,0 | 5 | 10.300 | 4.220 | |
| 300 | 323,9 | 445 | 329 | 26 | 400 | 5 | 12 | M 20 | 22 | 327,6 | 22 | 370 | 35 | 4,0 | 5,0 0 | 5 | 14.000 | 4.850 | |
| 350 | 355,6 | 505 | 362 | 28 | 460 | 6 | 16 | M 20 | 22 | 359,7 | 22 | 430 | 35 | 6 | 18.500 | 6.710 | |||
| 350 | 368,0 | 505 | 374 | 28 | 460 | 6 | 16 | M 20 | 22 | 372,2 | 22 | 430 | 35 | 6 | 18.500 | 6.710 | |||
| 400 | 406,4 | 565 | 413 | 32 | 515 | 6 | 16 | M 24 | 26 | 411,0 | 26 | 482 | 40 | 6 | 25.000 | 8.280 | |||
| 400 | 419,0 | 565 | 426 | 32 | 515 | 6 | 16 | M 24 | 26 | 423,7 | 26 | 482 | 40 | 6 | 25.000 | 8.280 | |||
| 500 | 508,0 | 521,0 | 670 | 517 | 38 | 620 | 6 | 20 | M 24 | 26 | 513,6 | 26 | 585 | 45 | 6 | 37.000 | 11.500 | ||
| 600 | 610,0 | 620,0 | 780 | 618 | 44 | 725 | 7 | 20 | M 27 | 30 | 616,6 | 30 | 685 | 45 | 7 | 56.300 | 15.600 | ||
| 700 | 711,0 | 720,0 | 895 | 721 | 50 | 840 | 7 | 24 | M27 | 30 | 718,6 | 30 | 800 | 45 | 7 | 80.400 | 23.200 | ||
| 800 | 813,0 | 820,0 | 1015 | 824 | 56 | 950 | 7 | 24 | M 30 | 33 | 821,5 | 33 | 905 | 45 | 7 | 113.200 | 29.200 | ||
| 900 | 914,4 | 1005 | 45 | ||||||||||||||||
| 1000 | 1016 | 1105 | 45 | ||||||||||||||||
