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A lap joint flange is a type of flange that is used to connect two pipes or tubes together. It consists of a flat face flange with a stub end, which is welded to the pipe or tube. The stub end is then connected to the mating flange using bolts. The advantage of using a lap joint flange is that it allows for easy alignment of the piping system and can be easily disassembled for maintenance or repair. It is commonly used in applications where the piping system may need to be modified or adjusted in the future.
Lap joint flange (simplified as LTF flange) shape is similar to slip on flange, it has a curved radius at the bore, which can connect with a stub end fittings and slide over the pipe. In this form, the pipe is usually welded to this stub end so the lap joint flange can rotate freely around the stub end.
The advantage of this combination that it will be easy with alignment for the bolt hole, easy to install and uninstall, much more convenient to do examinations and maintenance.
  Lap joint flange |
  Stainless steel Stub End |
  Lap Joint Flange with Lap Joint Stub End |
表中的内容：
- Lap Joint Flanges规格
- Types of Lap Joint Flanges
- Advantages of Lap Joint Flanges
- Lap Joint Flanges Applications
- Lap Joint Flanges Materials and Grades
- Lap Joint Flanges Dimensions
- Lap Joint Flanges Dimensions Tolerance
- ASME B16 5 Lap Joint Flange Pressure Rating
- Lap Joint Flanges Price List
- Differences between lap joint flange and slip on flange
Lap Joint Flanges 规格
| ap Joint Flanges Standards | ANSI/ASME B16.5, B16.47 A系列 & 乙, B16.48, BS4504, 学士 10, EN-1092, 从, 美标法兰, ASME法兰, 英标法兰, 德标法兰, 和法兰, GOST法兰, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JIS B2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| ASME B16.5 Lap Joint Flanges Size Chart | 1/2″ (15 注意) 至 48″ (1200注意) |
| Lap Joint Flanges Pressure Rating ANSI | 班级 150 位置服务, 300 位置服务, 600 位置服务, 900 位置服务, 1500 位置服务, 2500 LBS Lap Joint Flanges |
| 涂层 | 油黑漆, 防锈漆, 镀锌, 黄色透明, Cold and Hot Dip Galvanized Lap Joint Flanges |
| Test Certificates | EN 10204/3.1B
Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, ETC |
| Most common types of Lap Joint Flanges | 锻造 / 螺纹式 / 拧紧 / 盘子 |
| 连接型/法兰面型 | 凸面 (射频), 环形接头 (RTJ), 平面 (FF), 大公母 (LMF), 搭接面 (陆家丰), 小公母 (单模光纤), 小舌头, 大舌头 & 槽, 槽 |
| 生产工艺 | · 锻造, 热处理和机加工 |
| 测试 | 直读光谱仪, 水压试验机, X射线探测器, UI超声探伤仪, 磁粉检测仪 |
| 设备 | 压机, 折弯机, 推料机, 电动坡口机, 喷砂机等 |
| Lap Joint Flanges Uses & 应用 | · 沥青升级剂.
· 重油炼油厂. · 核电 (大部分是无缝的). · 石化产品和酸. |
Types of Lap Joint Flanges
| ANSI B16.5 Lap Joint Flanges | Lap Joint Flange Dimensions |
| Lap Joint Raised Face Flange | Raised Faced Lap Joint Flanges |
| ASME B16.5 Loose Flanges | ANSI B16.5 Class 150 Lap Joint Flanges |
| ASME B16.47 Lap Joint Flange | JIS Lap Joint flange |
| Lap Joint Flange Flat Face | ASME B16.47 Series A and B Loose Flanges Exporter |
| ANSI B16.5 class 150 Loose Flange | ANSI 150 活套法兰 |
| Lap Joint Flange Class 300 | High Quality Loose Flanges |
| JIS Loose Flange | JIS 10K Lap Joint Flange |
| JIS 16K Lap Joint Flange | Lap Joint Flanges EN 1092-1 |
| Lap Joint flange High Temperature | Flat Faced Lap Joint Flanges Stockist |
| 36 Inch Lap joint flange | 30 Inch Lap Joint flange |
| Lap Joint Flange UNI 6090 | Metric Lap Joint flange |
| ASME B16.47 Series A and B Loose Flanges | Lap Joint Flanges ANSI |
Advantages of Lap Joint Flanges
Lap Joint Flanges Lap Joint flanges have certain special advantages over other flanges. These are as follows:
- Lap Joint flanges have the freedom to swivel around the pipe. This facilitates the lining up of opposing flange bolt holes.
- Lack of contact with the fluid inside the pipe leads to the greater durability of these flanges.
- In piping systems which corrode or erode quickly, the lap joint flanges may be salvaged for re-use.
- The pressure-holding capacity of lap joint flanges is little. But it is better than that of slip-on flanges.
- The Lap Joint works as a backing ring on the stub.
- The main advantage of lap joint flange is that the bolt holes can be aligned with the matching flange after the welds have been completed.
- They allow rotational alignment capability.
Lap Joint Flanges Applications
- 食品加工行业
- 气体加工行业
- 发电行业
- 化肥工业
- 石化工业
- 油 & 天然气工业
- 化学工业
- 制糖业
Lap Joint Flanges Materials and Grades
| Stainless Steel Lap Joint Flange |
| 美国材料试验协会 182, A 240 F 304, 304L, 304H, 316, 316L, 316的, 310, 310S, 321, 321H, 317, 347, 347H,904L |
| Carbon Steel Lap Joint Flange |
| 美国材料试验协会 / ASME有限公司 105 美国材料试验协会 / ASME A 350 , 美国材料试验协会 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52 |
| Low Temperature Lap Joint Flange |
| ASTM A350 LF2, LF3, LF6 |
| Alloy Steel Lap Joint Flange |
| 美国材料试验协会 / ASME有限公司 182 & A 387 F1, F5, F9, F11, F12, F22, F91 |
| 复式 & Super Duplex Steel Lap Joint Flange |
| 美国材料试验协会 / ASME有限公司 182 F 44, F 45, F51, F 53, F 55, F 60, F 61 |
| Nickel Alloy Lap Joint Flange |
| 我们 10276 (哈氏合金C 276), 我们 6625 (铬镍铁合金 625), 我们 6601 (铬镍铁合金 601), 我们 6600 (铬镍铁合金 600), 我们 8825 (铬镍铁合金 825), 我们 8020 (合金 20 / 20 CB 3), 我们 4400 (蒙乃尔合金 400), 我们 2201 (镍 201), 美国材料试验协会 / 美国机械工程师学会SB 336 我们 2200 (镍 200) |
| High Yield Lap Joint Flanges |
| ASTM A694 F42, F52, F60, F65, F70 |
Lap Joint Flanges Dimensions
活套法兰尺寸图
LAP JOINT FLANGE DIMENSIONS CLASS 150, 150 LB LAP JOINT FLANGE
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | Machine Bolt Length | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | ||||||||||
| 1/2 | 15 | 90 | 30 | 16 | 22.9 | 60.3 | 11.2 | 3 | 4 | 1/2 | 50 | 55 | 5/8 | M14 | 0.8 |
| 3/4 | 20 | 100 | 38 | 16 | 28.2 | 69.9 | 12.7 | 3 | 4 | 1/2 | 50 | 65 | 5/8 | M14 | 0.9 |
| 1 | 25 | 110 | 49 | 17 | 34.9 | 79.4 | 14.3 | 3 | 4 | 1/2 | 55 | 65 | 5/8 | M14 | 0.9 |
| 1 1/4 | 32 | 115 | 59 | 21 | 43.7 | 88.9 | 15.9 | 5 | 4 | 1/2 | 55 | 70 | 5/8 | M14 | 1.4 |
| 1 1/2 | 40 | 125 | 65 | 22 | 50 | 98.4 | 17.5 | 6 | 4 | 1/2 | 65 | 70 | 5/8 | M14 | 1.4 |
| 2 | 50 | 150 | 78 | 25 | 62.5 | 120.7 | 19.1 | 8 | 4 | 5/8 | 70 | 85 | 3/4 | M16 | 2.3 |
| 2 1/2 | 65 | 180 | 90 | 29 | 75.4 | 139.7 | 22.3 | 8 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 3.2 |
| 3 | 80 | 190 | 108 | 30 | 91.4 | 152.4 | 23.9 | 10 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 3.7 |
| 3 1/2 | 90 | 215 | 122 | 32 | 104.1 | 177.8 | 23.9 | 11 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 5 |
| 4 | 100 | 230 | 135 | 33 | 116.8 | 190.5 | 23.9 | 11 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 5.9 |
| 5 | 125 | 255 | 164 | 36 | 144.4 | 215.9 | 23.9 | 11 | 8 | 3/4 | 85 | 95 | 7/8 | M20 | 6.8 |
| 6 | 150 | 280 | 192 | 40 | 171.4 | 241.3 | 25.4 | 13 | 8 | 3/4 | 85 | 100 | 7/8 | M20 | 8.6 |
| 8 | 200 | 345 | 246 | 44 | 222.2 | 298.5 | 28.6 | 13 | 8 | 3/4 | 90 | 110 | 7/8 | M20 | 13.7 |
| 10 | 250 | 405 | 305 | 49 | 277.4 | 362 | 30.2 | 13 | 12 | 7/8 | 100 | 115 | 1 | M24 | 19.5 |
| 12 | 300 | 485 | 365 | 56 | 328.2 | 431.8 | 31.8 | 13 | 12 | 7/8 | 100 | 120 | 1 | M24 | 29 |
| 14 | 350 | 535 | 400 | 79 | 360.2 | 476.3 | 35 | 13 | 12 | 1 | 115 | 135 | 1 1/8 | M27 | 41 |
| 16 | 400 | 595 | 457 | 87 | 411.2 | 539.8 | 36.6 | 13 | 16 | 1 | 115 | 135 | 1 1/8 | M27 | 54 |
| 18 | 450 | 635 | 505 | 97 | 462.3 | 577.9 | 39.7 | 13 | 16 | 1 1/8 | 125 | 145 | 1 1/4 | M30 | 59 |
| 20 | 500 | 700 | 559 | 103 | 514.4 | 635 | 42.9 | 13 | 20 | 1 1/8 | 140 | 160 | 1 1/4 | M30 | 75 |
| 24 | 600 | 815 | 663 | 111 | 616 | 749.3 | 47.9 | 13 | 20 | 1 1/4 | 150 | 170 | 1 3/8 | M33 | 100 |
The dimensions are in millimeters
Source : ASME B16.5 – 2007
LAP JOINT FLANGE CLASS 300 方面, 300 LB LAP JOINT FLANGE
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | Machine Bolt Length | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | ||||||||||
| 1/2 | 15 | 95 | 38 | 22 | 22.9 | 66.7 | 14.3 | 3 | 4 | 1/2 | 55 | 65 | 5/8 | M14 | 1.2 |
| 3/4 | 20 | 115 | 48 | 25 | 28.2 | 82.6 | 15.9 | 3 | 4 | 5/8 | 65 | 75 | 3/4 | M16 | 1.4 |
| 1 | 25 | 125 | 54 | 27 | 34.9 | 88.9 | 17.5 | 3 | 4 | 5/8 | 65 | 75 | 3/4 | M16 | 1.4 |
| 1 1/4 | 32 | 135 | 64 | 27 | 43.7 | 98.4 | 19.1 | 5 | 4 | 5/8 | 70 | 85 | 3/4 | M16 | 1.8 |
| 1 1/2 | 40 | 155 | 70 | 30 | 50 | 114.3 | 20.7 | 6 | 4 | 3/4 | 75 | 90 | 7/8 | M20 | 2.7 |
| 2 | 50 | 165 | 84 | 33 | 62.5 | 127 | 22.3 | 8 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 3.2 |
| 2 1/2 | 65 | 190 | 100 | 38 | 75.4 | 149.2 | 25.4 | 8 | 8 | 3/4 | 85 | 100 | 7/8 | M20 | 4.6 |
| 3 | 80 | 210 | 117 | 43 | 91.4 | 168.3 | 28.6 | 10 | 8 | 3/4 | 90 | 110 | 7/8 | M20 | 5.9 |
| 3 1/2 | 90 | 230 | 133 | 44 | 104.1 | 184.2 | 30.2 | 11 | 8 | 3/4 | 95 | 110 | 7/8 | M20 | 7.7 |
| 4 | 100 | 255 | 146 | 48 | 116.8 | 200 | 31.8 | 11 | 8 | 3/4 | 95 | 115 | 7/8 | M20 | 10 |
| 5 | 125 | 280 | 178 | 51 | 144.4 | 235 | 35 | 11 | 8 | 3/4 | 110 | 120 | 7/8 | M20 | 12.7 |
| 6 | 150 | 320 | 206 | 52 | 171.4 | 269.9 | 36.6 | 13 | 12 | 3/4 | 110 | 120 | 7/8 | M20 | 17.7 |
| 8 | 200 | 380 | 260 | 62 | 222.2 | 330.2 | 41.3 | 13 | 12 | 7/8 | 120 | 140 | 1 | M24 | 26 |
| 10 | 250 | 445 | 321 | 95 | 277.4 | 387.4 | 47.7 | 13 | 16 | 1 | 140 | 160 | 1 1/8 | M27 | 36 |
| 12 | 300 | 520 | 375 | 102 | 328.2 | 450.8 | 50.8 | 13 | 16 | 1 1/8 | 145 | 170 | 1 1/4 | M30 | 52 |
| 14 | 350 | 585 | 425 | 111 | 360.2 | 514.4 | 54 | 13 | 20 | 1 1/8 | 160 | 180 | 1 1/4 | M30 | 75 |
| 16 | 400 | 650 | 483 | 121 | 411.2 | 571.5 | 57.2 | 13 | 20 | 1 1/4 | 165 | 190 | 1 3/8 | M33 | 86 |
| 18 | 450 | 710 | 533 | 130 | 462.3 | 628.6 | 60.4 | 13 | 24 | 1 1/4 | 170 | 195 | 1 3/8 | M33 | 113 |
| 20 | 500 | 775 | 587 | 140 | 514.4 | 685.8 | 63.5 | 13 | 24 | 1 1/4 | 185 | 205 | 1 3/8 | M33 | 143 |
| 24 | 600 | 915 | 702 | 153 | 616 | 812.8 | 69.9 | 13 | 24 | 1 1/2 | 205 | 230 | 1 5/8 | M39 | 216 |
The dimensions are in millimeters
Source : ASME B16.5 – 2007
LAP JOINT FLANGE DIMENSIONS CLASS 400
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | |||||||||
| 1/2 | 15 | 95 | 38 | 22 | 22.9 | 66.7 | 14.3 | 3 | 4 | 1/2 | 75 | 5/8 | M14 | 1.3 |
| 3/4 | 20 | 115 | 48 | 25 | 28.2 | 82.6 | 15.9 | 3 | 4 | 5/8 | 90 | 3/4 | M16 | 1.5 |
| 1 | 25 | 125 | 54 | 27 | 34.9 | 88.9 | 17.5 | 3 | 4 | 5/8 | 90 | 3/4 | M16 | 1.8 |
| 1 1/4 | 32 | 135 | 64 | 29 | 43.7 | 98.4 | 20.7 | 5 | 4 | 5/8 | 95 | 3/4 | M16 | 2.3 |
| 1 1/2 | 40 | 155 | 70 | 32 | 50 | 114.3 | 22.3 | 6 | 4 | 3/4 | 110 | 7/8 | M20 | 3.2 |
| 2 | 50 | 165 | 84 | 37 | 62.5 | 127 | 25.4 | 8 | 8 | 5/8 | 110 | 3/4 | M16 | 4.1 |
| 2 1/2 | 65 | 190 | 100 | 41 | 75.4 | 149.2 | 28.6 | 8 | 8 | 3/4 | 120 | 7/8 | M20 | 5.9 |
| 3 | 80 | 210 | 117 | 46 | 91.4 | 168.3 | 31.8 | 10 | 8 | 3/4 | 125 | 7/8 | M20 | 7.3 |
| 3 1/2 | 90 | 230 | 133 | 49 | 104.1 | 184.2 | 35 | 10 | 8 | 7/8 | 140 | 1 | M24 | 9.6 |
| 4 | 100 | 255 | 146 | 51 | 116.8 | 200 | 35 | 11 | 8 | 7/8 | 140 | 1 | M24 | 11.8 |
| 5 | 125 | 280 | 178 | 54 | 144.5 | 235 | 38.1 | 11 | 8 | 7/8 | 145 | 1 | M24 | 14.1 |
| 6 | 150 | 320 | 206 | 57 | 171.4 | 269.9 | 41.3 | 13 | 12 | 7/8 | 150 | 1 | M24 | 20 |
| 8 | 200 | 380 | 260 | 68 | 222.2 | 330 | 47.7 | 13 | 12 | 1 | 170 | 1 1/8 | M27 | 31 |
| 10 | 250 | 445 | 321 | 102 | 277.4 | 387.4 | 54 | 13 | 16 | 1 1/8 | 190 | 1 1/4 | M30 | 42 |
| 12 | 300 | 520 | 375 | 108 | 328.2 | 450.8 | 57.2 | 13 | 16 | 1 1/4 | 205 | 1 3/8 | M33 | 59 |
| 14 | 350 | 585 | 425 | 117 | 360.2 | 514.4 | 60.4 | 13 | 20 | 1 1/4 | 210 | 1 3/8 | M33 | 82 |
| 16 | 400 | 650 | 483 | 127 | 411.2 | 571.5 | 63.5 | 13 | 20 | 1 3/8 | 220 | 1 1/2 | M36 | 107 |
| 18 | 450 | 710 | 533 | 137 | 462.3 | 628.6 | 66.7 | 13 | 24 | 1 3/8 | 230 | 1 1/2 | M36 | 130 |
| 20 | 500 | 775 | 587 | 146 | 514.4 | 685.8 | 69.9 | 13 | 24 | 1 1/2 | 240 | 1 3/4 | M39 | 157 |
| 24 | 600 | 915 | 702 | 159 | 616 | 812.8 | 76.2 | 13 | 24 | 1 3/4 | 265 | 1 7/8 | M45 | 232 |
LAP JOINT FLANGE DIMENSIONS CLASS 600
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | |||||||||
| 1/2 | 15 | 95 | 38 | 22 | 22.9 | 66.7 | 14.3 | 3 | 4 | 1/2 | 75 | 5/8 | M14 | 1.3 |
| 3/4 | 20 | 115 | 48 | 25 | 28.2 | 82.6 | 15.9 | 3 | 4 | 5/8 | 90 | 3/4 | M16 | 1.4 |
| 1 | 25 | 125 | 54 | 27 | 34.9 | 88.9 | 17.5 | 3 | 4 | 5/8 | 90 | 3/4 | M16 | 1.8 |
| 1 1/4 | 32 | 135 | 64 | 29 | 43.7 | 98.4 | 20.7 | 5 | 4 | 5/8 | 95 | 3/4 | M16 | 2.3 |
| 1 1/2 | 40 | 155 | 70 | 32 | 50 | 114.3 | 22.3 | 6 | 4 | 3/4 | 110 | 7/8 | M20 | 3.2 |
| 2 | 50 | 165 | 84 | 37 | 62.5 | 127 | 25.4 | 8 | 8 | 5/8 | 110 | 3/4 | M16 | 4.1 |
| 2 1/2 | 65 | 190 | 100 | 41 | 75.4 | 149.2 | 28.6 | 8 | 8 | 3/4 | 120 | 7/8 | M20 | 5.9 |
| 3 | 80 | 210 | 117 | 46 | 91.4 | 168.3 | 31.8 | 10 | 8 | 3/4 | 125 | 7/8 | M20 | 7.3 |
| 3 1/2 | 90 | 230 | 133 | 49 | 104.1 | 184.2 | 35 | 11 | 8 | 7/8 | 140 | 1 | M24 | 9.6 |
| 4 | 100 | 275 | 152 | 54 | 116.8 | 215.9 | 38.1 | 11 | 8 | 7/8 | 145 | 1 | M24 | 16.8 |
| 5 | 125 | 330 | 189 | 60 | 144.4 | 266.7 | 44.5 | 11 | 8 | 1 | 165 | 1 1/8 | M27 | 29 |
| 6 | 150 | 355 | 222 | 67 | 171.4 | 292.1 | 47.7 | 13 | 12 | 1 | 170 | 1 1/8 | M27 | 36 |
| 8 | 200 | 420 | 273 | 76 | 222.2 | 349.2 | 55.6 | 13 | 12 | 1 1/8 | 190 | 1 1/4 | M30 | 52 |
| 10 | 250 | 510 | 343 | 111 | 277.4 | 431.8 | 63.5 | 13 | 16 | 1 1/4 | 215 | 1 3/8 | M33 | 77 |
| 12 | 300 | 560 | 400 | 117 | 328.2 | 489 | 66.7 | 13 | 20 | 1 1/4 | 220 | 1 3/8 | M33 | 91 |
| 14 | 350 | 605 | 432 | 127 | 360.2 | 527 | 69.9 | 13 | 20 | 1 3/8 | 235 | 1 1/2 | M36 | 105 |
| 16 | 400 | 685 | 495 | 140 | 411.2 | 603.2 | 76.2 | 13 | 20 | 1 1/2 | 255 | 1 5/8 | M39 | 150 |
| 18 | 450 | 745 | 546 | 152 | 462.3 | 654 | 82.6 | 13 | 20 | 1 5/8 | 275 | 1 3/4 | M42 | 182 |
| 20 | 500 | 815 | 610 | 165 | 514.4 | 723.9 | 88.9 | 13 | 24 | 1 5/8 | 285 | 1 3/4 | M42 | 232 |
| 24 | 600 | 940 | 718 | 184 | 616 | 838.2 | 101.6 | 13 | 24 | 1 7/8 | 330 | 2 | M48 | 332 |
LAP JOINT FLANGE DIMENSIONS CLASS 900
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | |||||||||
| 1/2 | 15 | 120 | 38 | 32 | 22.9 | 82.6 | 22.3 | 3 | 4 | 3/4 | 110 | 7/8 | M20 | 1.8 |
| 3/4 | 20 | 130 | 44 | 35 | 28.2 | 88.9 | 25.4 | 3 | 4 | 3/4 | 115 | 7/8 | M20 | 2.3 |
| 1 | 25 | 150 | 52 | 41 | 34.9 | 101.6 | 28.6 | 3 | 4 | 7/8 | 125 | 1 | M24 | 3.6 |
| 1 1/4 | 32 | 160 | 64 | 41 | 43.7 | 111.1 | 28.6 | 5 | 4 | 7/8 | 125 | 1 | M24 | 4.1 |
| 1 1/2 | 40 | 180 | 70 | 44 | 50 | 123.8 | 31.8 | 6 | 4 | 1 | 140 | 1 1/8 | M27 | 5.5 |
| 2 | 50 | 215 | 105 | 57 | 62.5 | 165.1 | 38.1 | 8 | 8 | 7/8 | 145 | 1 | M24 | 11.5 |
| 2 1/2 | 65 | 245 | 124 | 64 | 75.4 | 190.5 | 41.3 | 8 | 8 | 1 | 160 | 1 1/8 | M27 | 16.5 |
| 3 | 80 | 240 | 127 | 54 | 91.4 | 190.5 | 38.1 | 10 | 8 | 7/8 | 145 | 1 | M24 | 12 |
| 4 | 100 | 290 | 159 | 70 | 116.8 | 235 | 44.5 | 11 | 8 | 1 1/8 | 170 | 1 1/4 | M30 | 24 |
| 5 | 125 | 350 | 190 | 79 | 144.4 | 279.4 | 50.8 | 11 | 8 | 1 1/4 | 190 | 1 3/8 | M33 | 38 |
| 6 | 150 | 380 | 235 | 86 | 171.4 | 317.5 | 55.6 | 13 | 12 | 1 1/8 | 190 | 1 1/4 | M30 | 50 |
| 8 | 200 | 470 | 298 | 114 | 222.2 | 393.7 | 63.5 | 13 | 12 | 1 3/8 | 220 | 1 1/2 | M36 | 78 |
| 10 | 250 | 545 | 368 | 127 | 277.4 | 469.9 | 69.9 | 13 | 16 | 1 3/8 | 235 | 1 1/2 | M36 | 112 |
| 12 | 300 | 610 | 419 | 143 | 328.2 | 533.4 | 79.4 | 13 | 20 | 1 3/8 | 255 | 1 1/2 | M36 | 148 |
| 14 | 350 | 640 | 451 | 156 | 360.2 | 558.8 | 85.8 | 13 | 20 | 1 1/2 | 275 | 1 5/8 | M39 | 182 |
| 16 | 400 | 705 | 508 | 165 | 411.2 | 616 | 88.9 | 13 | 20 | 1 5/8 | 285 | 1 3/4 | M42 | 193 |
| 18 | 450 | 785 | 565 | 190 | 462.3 | 685.8 | 101.6 | 13 | 20 | 1 7/8 | 325 | 2 | M48 | 258 |
| 20 | 500 | 855 | 622 | 210 | 514.4 | 749.3 | 108 | 13 | 20 | 2 | 350 | 2 1/8 | M52 | 317 |
| 24 | 600 | 1040 | 749 | 267 | 616 | 901.7 | 139.7 | 13 | 20 | 2 1/2 | 440 | 2 5/8 | M64 | 608 |
LAP JOINT FLANGE DIMENSIONS CLASS 1500
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | |||||||||
| 1/2 | 15 | 120 | 38 | 32 | 22.9 | 82.6 | 22.3 | 3 | 4 | 3/4 | 110 | 7/8 | M20 | 1.8 |
| 3/4 | 20 | 130 | 44 | 35 | 28.2 | 88.9 | 25.4 | 3 | 4 | 3/4 | 115 | 7/8 | M20 | 2.3 |
| 1 | 25 | 150 | 52 | 41 | 34.9 | 101.6 | 28.6 | 3 | 4 | 7/8 | 125 | 1 | M24 | 3.7 |
| 1 1/4 | 32 | 160 | 64 | 41 | 43.7 | 111.1 | 28.6 | 5 | 4 | 7/8 | 125 | 1 | M24 | 4.1 |
| 1 1/2 | 40 | 180 | 70 | 44 | 50 | 123.8 | 31.8 | 6 | 4 | 1 | 140 | 1 1/8 | M27 | 5.5 |
| 2 | 50 | 215 | 105 | 57 | 62.5 | 165.1 | 38.1 | 8 | 8 | 7/8 | 145 | 1 | M24 | 9.8 |
| 2 1/2 | 65 | 245 | 124 | 64 | 75.4 | 190.5 | 41.3 | 8 | 8 | 1 | 160 | 1 1/8 | M27 | 16.4 |
| 3 | 80 | 265 | 133 | 73 | 91.4 | 203.2 | 47.7 | 10 | 8 | 1 1/8 | 180 | 1 1/4 | M30 | 21.8 |
| 4 | 100 | 310 | 162 | 90 | 116.8 | 241.3 | 54 | 11 | 8 | 1 1/4 | 195 | 1 3/8 | M33 | 33 |
| 5 | 125 | 375 | 197 | 105 | 144.4 | 292.1 | 73.1 | 11 | 8 | 1 1/2 | 250 | 1 5/8 | M39 | 59 |
| 6 | 150 | 395 | 229 | 119 | 171.4 | 317.5 | 82.6 | 13 | 12 | 1 3/8 | 260 | 1 1/2 | M36 | 75 |
| 8 | 200 | 485 | 292 | 143 | 222.2 | 393.7 | 92.1 | 13 | 12 | 1 5/8 | 290 | 1 3/4 | M42 | 118 |
| 10 | 250 | 585 | 368 | 178 | 277.4 | 482.6 | 108 | 13 | 12 | 1 7/8 | 335 | 2 | M48 | 198 |
| 12 | 300 | 675 | 451 | 219 | 328.2 | 571.5 | 123.9 | 13 | 16 | 2 | 375 | 2 1/8 | M52 | 264 |
| 14 | 350 | 750 | 495 | 241 | 360.2 | 635 | 133.4 | 13 | 16 | 2 1/4 | 405 | 2 3/8 | M56 | 341 |
| 16 | 400 | 825 | 552 | 260 | 411.2 | 704.8 | 146.1 | 13 | 16 | 2 1/2 | 445 | 2 5/8 | M64 | 454 |
| 18 | 450 | 915 | 597 | 276 | 462.3 | 774.7 | 162 | 13 | 16 | 2 3/4 | 495 | 2 7/8 | M72 | 590 |
| 20 | 500 | 985 | 641 | 292 | 514.4 | 831.8 | 177.8 | 13 | 16 | 3 | 540 | 3 1/8 | M76 | 792 |
| 24 | 600 | 1170 | 762 | 330 | 616 | 990.6 | 203.2 | 13 | 16 | 3 1/2 | 615 | 3 5/8 | M90 | 1248 |
LAP JOINT FLANGE DIMENSIONS CLASS 2500
| Size in Inch | Size in mm | 外径 | Flange Thick. | Lapped Thick. | Lapped ID | PCD | Lapped Thick. | Lapped Radius | No of Bolts | Bolt Size UNC | RF Stud Length | Hole Size | ISO Stud Size | Weight in kg |
| A | 乙 | C | D | 乙 | G | |||||||||
| 1/2 | 15 | 135 | 43 | 40 | 22.9 | 88.9 | 30.2 | 3 | 4 | 3/4 | 120 | 7/8 | M20 | 3.2 |
| 3/4 | 20 | 140 | 51 | 43 | 28.2 | 95.2 | 31.8 | 3 | 4 | 3/4 | 125 | 7/8 | M20 | 3.7 |
| 1 | 25 | 160 | 57 | 48 | 34.9 | 108 | 35 | 3 | 4 | 7/8 | 140 | 1 | M24 | 5 |
| 1 1/4 | 32 | 185 | 73 | 52 | 43.7 | 130.2 | 38.1 | 5 | 4 | 1 | 150 | 1 1/8 | M27 | 7.5 |
| 1 1/2 | 40 | 205 | 79 | 60 | 50 | 146 | 44.5 | 6 | 4 | 1 1/8 | 170 | 1 1/4 | M30 | 10 |
| 2 | 50 | 235 | 95 | 70 | 62.5 | 171.4 | 50.9 | 8 | 8 | 1 | 180 | 1 1/8 | M27 | 17.5 |
| 2 1/2 | 65 | 265 | 114 | 79 | 75.4 | 196.8 | 57.2 | 8 | 8 | 1 1/8 | 195 | 1 1/4 | M30 | 23 |
| 3 | 80 | 305 | 133 | 92 | 91.4 | 228.6 | 66.7 | 10 | 8 | 1 1/4 | 220 | 1 3/8 | M33 | 37.8 |
| 4 | 100 | 355 | 165 | 108 | 116.8 | 273 | 76.2 | 11 | 8 | 1 1/2 | 255 | 1 5/8 | M39 | 57 |
| 5 | 125 | 420 | 203 | 130 | 144.4 | 323.8 | 92.1 | 11 | 8 | 1 3/4 | 300 | 1 7/8 | M45 | 95 |
| 6 | 150 | 485 | 235 | 152 | 171.4 | 368.3 | 108 | 13 | 8 | 2 | 345 | 2 1/8 | M52 | 148 |
| 8 | 200 | 550 | 305 | 178 | 222.2 | 438.2 | 127 | 13 | 12 | 2 | 380 | 2 1/8 | M52 | 221 |
| 10 | 250 | 675 | 375 | 229 | 277.4 | 539.8 | 165.1 | 13 | 12 | 2 1/2 | 490 | 2 5/8 | M64 | 425 |
| 12 | 300 | 760 | 441 | 254 | 328.2 | 619.1 | 184.2 | 13 | 12 | 2 3/4 | 540 | 2 7/8 | M72 | 500 |
Lap Joint Flanges Price List
| Lap Joint Flanges type | Lap Joint Flanges Price in USD |
| Stainless Steel Lap Joint Flanges | 美元 $ 22.42 /公斤 |
| Carbon steel Lap Joint Flanges | 美元 $16.56 /公斤 |
| Alloy steel Lap Joint Flanges | 美元 $ 20.08 /公斤 |
| ANSI b16 5 Lap Joint Flanges | 美元 $ 25.22 /公斤 |
| ASME b16.47 Lap Joint Flanges | 美元 $ 19.28 /公斤 |
Differences between lap joint flange and slip on flange
Slip on flange is essentially a ring placed over the pipe end. And the flange face extending a sufficient distance from the pipe end, so as to apply a weld on the inner diameter. The outer diameter of slip on flange can also be welded to the rear side of flange. Comparing to weld neck flange, slip on flange has lower material cost and easier to align.
The lap flange is very similar to a slip on flange. From the outside, it almost looks like the same. But you look on the backside, the holes and faces of lap joint flange has a curved radius to accommodate the lap joint stub end.
If type B or type C stub end is used, the slip on flange can be used as the lap joint flange.
