ASME/ANSI B16.5 150 Class Lap Joint Flange/Standards, Dimensions & Weight

Lap Joint Flanges, also known as Loose flanges, are utilized in piping systems where lapped pipes or lap joint stub ends are fitted. These items come with a higher initial cost when compared to welding neck flanges, but their combined cost is only approximately one-third higher. Their pressure-holding ability is similar to slip-on flanges and their fatigue life is much less than that of welding neck flanges.heir ability to swivel flanges and align bolt holes considerably simplifies the erection of large diameter or rigid piping. Lap Joint flanges have some unique benefits. The ability to swivel around the pipe enables the opposing flange bolt holes to be lined up easily. Furthermore, the lack of contact with fluid in the pipe often permits the use of inexpensive carbon steel flanges with corrosion-resistant pipes. In systems that corrode or erode quickly, these flanges can be salvaged for reuse.

  • Our company is a manufacturer of ASME/ANSI B16.5 150LB Lap Joint Flange, which is precisely engineered in accordance with international quality standards. For detailed dimensions of 150 Class Lap Joint flange, kindly check the table below. Also, you can download the datasheet.
150 Class Lap Joint Flange Drawing ASME/ANSI B16.5
Product Lap Joint Flange
Pressure Rating 150 lb, 150 Class
Dimensional Specification ASME/ANSI B16.5
Size 1/2″ to 24″
Surface Treatment Anti-rust Oil, Paint, Zinc, Hot Dipped Galvanized
Grades 304, 304L, 316L, 321, 347, 904L, Duplex, Carbon Steel, Nickel Alloys
Test Certificates As per EN 10204 3.1
Inspection Videos, Pictures, Inspection Report with Goods
Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diam.
of
Hub		 Diameter of Raised Face Length Hub.Y Bore Corner
Radius
of Bore
of
lapped
Flange		 Diam.
of Bolt
Circle		 Diam.
of Bolt
Holes		 Number
of Bolts		 Diam. of
Bolts
(inch)		 KG LB
inch dn O C X G Y B R BC BH BN BD
1/2″ 15 89.00 11.20 30.20 35.10 15.70 22.90 3.00 60.50 15.80 4 1/2″ 0.4 0.9
3/4″ 20 98.50 12.70 38.10 42.90 15.70 28.20 3.00 69.90 15.80 4 1/2″ 0.7 1.5
1″ 25 108.00 14.20 49.30 50.80 17.50 35.10 3.00 79.30 15.80 4 1/2″ 0.8 1.8
1-1/4″ 32 117.50 15.70 58.70 63.50 20.60 43.70 4.80 88.90 15.80 4 1/2″ 1.1 2.4
1-1/2″ 40 127.00 17.50 65.00 73.20 22.40 50.00 6.40 98.60 15.80 4 1/2″ 1.4 3.1
2″ 50 152.50 19.10 77.70 91.90 25.40 62.50 7.90 120.70 19.10 4 5/8″ 2.2 4.8
2-1/2″ 65 178.00 22.40 90.40 104.60 28.40 75.40 7.90 139.70 19.10 4 5/8″ 3.5 7.7
3″ 80 190.50 23.90 108.00 127.00 30.20 91.40 9.70 152.40 19.10 4 5/8″ 3.8 8.4
3-1/2″ 90 216.00 23.90 122.20 139.70 31.80 104.10 9.70 177.80 19.10 8 5/8″ 5 11
4″ 100 228.50 23.90 134.90 157.20 33.30 116.80 11.20 190.50 19.10 8 5/8″ 5.6 12.3
5″ 125 254.00 23.90 163.60 185.70 36.60 144.50 11.20 215.90 22.40 8 3/4″ 6.5 14.3
6″ 150 279.50 25.40 192.00 215.90 39.60 171.50 12.70 241.30 22.40 8 3/4″ 8.1 18
8″ 200 343.00 28.40 246.10 269.70 44.50 222.30 12.70 298.50 22.40 8 3/4″ 13 28.6
10″ 250 406.50 30.20 304.80 323.90 49.30 277.40 12.70 362.00 25.40 12 7/8″ 18.4 40
12″ 300 482.50 31.80 365.30 381.00 55.60 328.20 12.70 431.80 25.40 12 7/8″ 28.5 63
14″ 350 533.50 35.10 400.10 412.80 79.20 360.20 12.70 476.30 28.50 12 1″ 41.5 91.5
16″ 400 597.00 36.60 457.20 469.90 87.40 411.20 12.70 539.80 28.50 16 1″ 53 117
18″ 450 635.00 39.60 505.00 533.40 96.80 462.30 12.70 577.90 31.80 16 1 1/8″ 59 130
20″ 500 698.50 42.90 558.80 584.20 103.10 514.40 12.70 635.00 31.80 20 1 1/8″ 74 163
24″ 600 813.00 47.80 663.40 692.20 111.30 616.00 12.70 749.30 35.10 20 1 1/4″ 99 218