ANSI/ASME B16.5 class 2500 lap joint flange

2019-06-25 14:04:13 Views:1224 ANSI/ASME B16.5 Flange / Flange Standards / Lap Joint Flange

ANSI/ASME B16.5 standard covers pressure,temperature,ratings,materials,dimensions,tolerances, marking, testing,and methods of designating openings for pipe flanges and flanged fittings.Lap joint flange dimensions are covered in ANSI/ASME B16.5 class 2500 for size NPS ½” to 12″.

A lap joint flange(loose flange) consist two parts,the backing flange and the stud end,the stub end will be butt welded to the pipe,and the lap joint flange will be slip around the stub end.The lap joint flange is not connected to the pipe and stub end directly,so it could be rotated,it is convenient to install the flange connection if there is some misalignment between the bolt holes.

Dimensions of ANSI/ASME B16.5 class 2500 lap joint flange:

ANSI ASME B16.5 Class 2500 Lap Joint Flange Dimensions

Pipe		Flange Data				Lap	Hub	Drilling Data			Weight
Nominal Pipe Size		A	B	C	D	R	F	H	I	J
	Outside Diameter	Overall Diameter	Inside Diameter	Flange Thickness min	Overall Length	Lap Radius	Hub Diameter	Number of Holes	Bolt Hole Diameter	Diameter of Circle of Holes	kg/piece
	in mm	in mm	in mm	in mm	in mm	in mm	in mm		in mm	in mm	kg/piece
½	0.840 21.30	5.255 133.4	0.900 22.90	1.190 30.20	1.560 39.60	0.120 3.000	1.690 42.90	4	0.880 22.40	3.500 88.90	2.92
¾	1.050 26.70	5.500 139.7	1.110 28.20	1.250 31.75	1.690 42.90	0.120 3.000	2.000 50.80	4	0.880 22.40	3.750 95.30	3.40
1	1.315 33.40	6.250 158.8	1.380 35.10	1.380 35.10	1.880 47.80	0.120 3.000	2.250 57.15	4	1.000 25.40	4.250 108.0	4.77
1¼	1.660 42.20	7.250 184.2	1.720 43.70	1.500 38.10	2.060 52.30	0.190 4.800	2.880 73.15	4	1.120 28.40	5.120 130.0	7.08
1½	1.900 48.30	8.000 203.2	1.970 50.00	1.750 44.50	2.380 60.45	0.250 6.400	3.120 79.25	4	1.250 31.75	5.750 146.1	9.93
2	2.375 60.30	9.250 235.0	2.460 62.50	2.000 50.80	2.750 69.85	0.310 7.900	3.750 95.30	8	1.120 28.40	6.750 171.5	14.7
2½	2.875 73.00	10.50 266.7	2.970 75.40	2.250 57.15	3.120 79.25	0.310 7.900	4.500 114.3	8	1.250 31.75	7.750 196.9	21.3
3	3.500 88.90	12.00 304.8	3.600 91.40	2.620 66.55	3.620 91.90	0.380 9.700	5.250 133.4	8	1.380 35.10	9.000 228.6	32.3
4	4.500 114.3	14.00 355.6	4.600 116.8	3.000 76.20	4.250 108.0	0.440 11.20	6.500 165.1	8	1.620 41.10	10.75 273.1	52.5
5	5.563 141.3	16.50 419.1	5.690 114.5	3.620 91.90	5.120 130.0	0.440 11.20	8.000 203.2	8	1.880 47.80	12.75 323.9	82.6
6	6.625 168.3	19.00 482.6	6.750 171.5	4.250 108.0	6.000 152.4	0.500 12.70	9.250 235.0	8	2.120 53.80	14.50 368.3	127
8	8.625 219.1	21.75 552.5	8.750 222.3	5.000 127.0	7.000 177.8	0.500 12.70	12.00 304.8	12	2.120 53.80	17.25 438.2	186
10	10.75 273.0	26.50 673.1	10.92 277.4	6.500 165.1	9.000 228.6	0.500 12.70	14.75 374.7	12	2.620 66.55	21.25 539.8	352
12	12.75 323.8	30.00 762.0	12.92 328.2	7.250 184.2	10.00 254.0	0.500 12.70	17.38 441.5	12	2.880 73.15	24.38 619.3	501

Notes: Weights are based on manufacturer’s data and are approximate.

Specifications of ANSI/ASME B16.5 flange:

Types of ANSI/ASME B16.5 forged flanges:

ANSI ASME B16.5 weld neck flange drawing	Weld neck flange(WN flange) is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography.The bores of both pipe and flange match,which reduces turbulence and erosion inside the pipeline.The weld neck is therefore favoured in critical applications.
ANSI ASME B16.5 blind flange drawing	Blind flange is used to blank off pipelines,valves and pumps,it can also be used as an inspection cover.It is sometimes referred to as a blank flange.
ANSI ASME B16.5 slip on flange drawing	Slip on flange(SO flange) is slipped over the pipe and then fillet welded.Slip-on flanges are easy to use in fabricated applications.
ANSI ASME B16.5 lap joint flange drawing	Lap joint flange(LJ flange) is always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it.This means the stub end or taft always makes the face.The lap joint is favoured in low pressure applications because it is easily assembled and aligned.To reduce cost these flanges can be supplied without a hub and/or in treated,coated carbon steel.
ANSI ASME B16.5 socket weld flange drawing	Socket weld flange(SW flange) is counter bored to accept the pipe before being fillet welded.The bore of the pipe and flange are both the same therefore giving good flow characteristics.
ANSI ASME B16.5 threaded flange drawing	Threaded flange is referred to as either threaded or screwed.It is used to connect other threaded components in low pressure,non-critical applications.No welding is required.
ANSI ASME B16.5 ring type joint flange drawing	Ring type joint is a method of ensuring leak proof flange connection at high pressures.A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal.This jointing method can be employed on weld neck flanges,slip on flange and blind flanges.

Materials of ANSI/ASME B16.5 class 2500 lap joint flange:

Carbon steel ANSI/ASME B16.5 lap joint flange:

ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn,etc.

Stainless steel ANSI/ASME B16.5 lap joint flange:

ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.

Alloy steel ANSI/ASME B16.5 lap joint flange:

ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22,etc.

Related:

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