Steel Flange & Pipe Flange Blind Flange

Short Description:

1.Types: Slip-On, Welding Neck, Blind, Socket Welding, Threaded, Lap Joint and Plate etc;
2.Standard:
(1) ANSI B16.5, A105 150LB / 300LB / 600LB / 900LB / 1500LB / 2500LB
(2) DIN 2573 PN6 / DIN 2576 PN10 / DIN2502 PN16 / DIN2503 P25-40 / DIN2566 PN16 / DIN2631-2635 RST37.2 OR C22.8
(3) JIS SS400 OR SF440 5K / 10K / 16K / 20K / 30K
(4) UNI 2276 / 2277 / 2278 / 6084 / 6089 / 6090 / 2544 / 2282 / 6091-6093
(5) EN1092 PN6 / PN10 / PN16 / PN25 / PN40 / TYPE1 TYPE2 TYPE 5 TYPE 12 TYPE 13
(6) BS4504 SANI1123 1000/3, 1600/3, 2500/3, T/D, T/E, T/F carbon steel flange
(7) AS2129 TABLE D / TABLE H / TABLE E carbon steel flange
(8) GOST 12820-80 / 12821-80 carbon steel flange
3.Wall Thickness: Sch10, Sch20 , Sch30, STD, Sch40, XS,Sch80, Sch100, Sch120, Sch140, XXS;
4.Pressure Rating: Class 150LBS, 300LBS, 600LBS, 900LBS, 1500LBS, 2000LBS, 3000LBS, 6000LBS, 9000 LBS;
5.Size: 1/2″ – 24″;
6.Surface treatment: Anti-rust oil, black / yellow / transparent / electric galvanized / hot galvanized.

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forged steel flange dimensions class150

BLIND FLANGE (1)

	Nominal size	Outside diam. of flange	Thick. of flange	Diam. of raised face	No. of holes	Diam. of holes	Diam. of bolts	Diam. of bolt circle	Approx. weight pounds Kg
		O	C	R
in.	1/2"	3.5	0.44	1.38	4	0.62	1/2	2.38	1
mm.		88.9	11.2	35.1		15.7	12.7	60.5	0.5
in.	3/4"	3.88	0.5	1.69	4	0.62	1/2	2.75	2
mm.		98.6	12.7	42.9		15.7	12.7	69.9	1
in.	1"	4.25	0.56	2	4	0.62	1/2	3.12	2
mm.		108	14.2	50.8		15.7	12.7	79.2	1
in.	1 1/4"	4.62	0.62	2.5	4	0.62	1/2	3.5	3
mm.		117.3	15.7	63.5		15.7	12.7	88.9	1
in.	1 1/2"	5	0.69	2.88	4	0.62	1/2	3.88	4
mm.		127	17.5	73.2		15.7	12.7	98.6	2
in.	2"	6	0.75	3.62	4	0.75	5/8	4.75	5
mm.		152.4	19.1	91.9		19.1	15.9	120.7	2
in.	2 1/2"	7	0.88	4.12	4	0.75	5/8	5.5	7
mm.		177.8	22.4	104.6		19.1	15.9	139.7	3
in.	3"	7.5	0.94	5	4	0.75	5/8	6	9
mm.		190.5	23.9	127		19.1	15.9	152.4	4
in.	3 1/2"	8.5	0.94	5.5	8	0.75	5/8	7	13
mm.		215.9	23.9	139.7		19.1	15.9	177.8	6
in.	4"	9	0.94	6.19	8	0.75	5/8	7.5	17
mm.		228.6	23.9	157.2		19.1	15.9	190.5	8
in.	5"	10	0.94	7.31	8	0.88	3/4	8.5	20
mm.		254	23.9	185.7		22.4	19.1	215.9	9
in.	6"	11	1	8.5	8	0.88	3/4	9.5	26
mm.		279.4	25.4	215.9		22.4	19.1	241.3	12
in.	8"	13.5	1.12	10.62	8	0.88	3/4	11.75	45
mm.		342.9	28.4	269.7		22.4	19.1	298.5	20
in.	10"	16	1.19	12.75	12	1	7/8	14.25	70
mm.		406.4	30.2	323.9		25.4	22.2	362	32
in.	12"	19	1.25	15	12	1	7/8	17	110
mm.		482.6	31.8	381		25.4	22.2	431.8	50
in.	14"	21	1.38	16.25	12	1.12	1	18.75	140
mm.		533.4	35.1	412.8		28.4	25.4	476.3	64
in.	16"	23.5	1.44	18.5	16	1.12	1	21.25	180
mm.		596.9	36.6	469.9		28.4	25.4	539.8	82
in.	18"	25	1.56	21	16	1.25	1 1/8	22.75	220
mm.		635	39.6	533.4		31.8	28.6	577.9	100
in.	20"	27.5	1.69	23	20	1.25	1 1/8	25	285
mm.		698.5	42.9	584.2		31.8	28.6	635	129
in.	24"	32	1.88	27.25	20	1.38	1 1/4	29.5	430
mm.		812.8	47.8	692.2		35.1	31.8	749.3	195

forged steel flange dimensions class300

BLIND FLANGE (1)

	Nominal size	Outside diam. of flange	Thick. of flange	Diam. of raised face	No. of holes	Diam. of holes	Diam. of bolts	Diam. of bolt circle	Approx. weight pounds Kg
		O	C	R
in.	1/2"	3.75	0.56	1.38	4	0.62	1/2	2.62	2
mm.		95.3	14.2	35.1		15.7	12.7	66.5	1
in.	3/4"	4.62	0.62	1.69	4	0.75	5/8	3.25	3
mm.		117.3	15.7	42.9		19.1	15.9	82.6	1
in.	1"	4.88	0.69	2	4	0.75	5/8	3.5	3
mm.		124	17.5	50.8		19.1	15.9	88.9	1
in.	1 1/4"	5.25	0.75	2.5	4	0.75	5/8	3.88	4
mm.		133.4	19.1	63.5		19.1	15.9	98.6	2
in.	1 1/2"	6.12	0.81	2.88	4	0.88	3/4	4.5	6
mm.		155.4	20.6	73.2		22.4	19.1	114.3	3
in.	2"	6.5	0.88	3.62	8	0.75	5/8	5	8
mm.		165.1	22.4	91.9		19.1	15.9	127	4
in.	2 1/2"	7.5	1	4.12	8	0.88	3/4	5.88	12
mm.		190.5	25.4	104.6		22.4	19.1	149.4	5
in.	3"	8.25	1.12	5	8	0.88	3/4	6.62	16
mm.		209.6	28.4	127		22.4	19.1	168.1	7
in.	3 1/2"	9	1.19	5.5	8	0.88	3/4	7.25	21
mm.		228.6	30.2	139.7		22.4	19.1	184.2	10
in.	4"	10	1.25	6.19	8	0.88	3/4	7.88	27
mm.		254	31.8	157.2		22.4	19.1	200.2	12
in.	5"	11	1.38	7.31	8	0.88	3/4	9.25	35
mm.		279.4	35.1	185.7		22.4	19.1	235	16
in.	6"	12.5	1.44	8.5	12	0.88	3/4	10.62	50
mm.		317.5	36.6	215.9		22.4	19.1	269.7	23
in.	8"	15	1.62	10.62	12	1	7/8	13	81
mm.		381	41.1	269.7		25.4	22.2	330.2	37
in.	10"	17.5	1.88	12.75	16	1.12	1	15.25	124
mm.		444.5	47.8	323.9		28.4	25.4	387.4	56
in.	12"	20.5	2	15	16	1.25	1 1/8	17.75	185
mm.		520.7	50.8	381		31.8	28.6	450.9	84
in.	14"	23	2.12	16.25	20	1.25	1 1/8	20.25	250
mm.		584.2	53.8	412.8		31.8	28.6	514.4	113
in.	16"	25.5	2.25	18.5	20	1.38	1 1/4	22.5	295
mm.		647.7	57.2	469.9		35.1	31.8	571.5	134
in.	18"	28	2.38	21	24	1.38	1 1/4	24.75	395
mm.		711.2	60.5	533.4		35.1	31.8	628.7	179
in.	20"	30.5	2.5	23	24	1.38	1 1/4	27	505
mm.		774.7	63.5	584.2		35.1	31.8	685.8	229
in.	24"	36	2.75	27.25	24	1.62	1 1/2	32	790
mm.		914.4	69.9	692.2		41.1	38.1	812.8	358

forged steel flange dimensions class600

BLIND FLANGE (1)

	Nominal size	Outside diam. of flange	Thick. of flange	Diam. of raised face	No. of holes	Diam. of holes	Diam. of bolts	Diam. of bolt circle	Approx. weight pounds Kg
		O	C	R
in.	1/2"	3.75	0.56	1.38	4	0.62	1/2	2.62	2
mm.		95.3	14.2	35.1		15.7	12.7	66.5	1
in.	3/4"	4.62	0.62	1.69	4	0.75	5/8	3.25	3
mm.		117.3	15.7	42.9		19.1	15.9	82.6	1
in.	1"	4.88	0.69	2	4	0.75	5/8	3.5	4
mm.		124	17.5	50.8		19.1	15.9	88.9	2
in.	1 1/4"	5.25	0.81	2.5	4	0.75	5/8	3.88	5
mm.		133.4	20.6	63.5		19.1	15.9	98.6	2
in.	1 1/2"	6.12	0.88	2.88	4	0.88	3/4	4.5	8
mm.		155.4	22.4	73.2		22.4	19.1	114.3	4
in.	2"	6.5	1	3.62	8	0.75	5/8	5	10
mm.		165.1	25.4	91.9		19.1	15.9	127	5
in.	2 1/2"	7.5	1.12	4.12	8	0.88	3/4	5.88	15
mm.		190.5	28.4	104.6		22.4	19.1	149.4	7
in.	3"	8.25	1.25	5	8	0.88	3/4	6.62	20
mm.		209.6	31.8	127		22.4	19.1	168.1	9
in.	3 1/2"	9	1.38	5.5	8	1	7/8	7.25	29
mm.		228.6	35.1	139.7		25.4	22.2	184.2	13
in.	4"	10.75	1.5	6.19	8	1	7/8	8.5	41
mm.		273.1	38.1	157.2		25.4	22.2	215.9	19
in.	5"	13	1.75	7.31	8	1.12	1	10.5	68
mm.		330.2	44.5	185.7		28.4	25.4	266.7	31
in.	6"	14	1.88	8.5	12	1.12	1	11.5	86
mm.		355.6	47.8	215.9		28.4	25.4	292.1	39
in.	8"	16.5	2.19	10.62	12	1.25	1 1/8	13.75	140
mm.		419.1	55.6	269.7		31.8	28.6	349.3	64
in.	10"	20	2.5	12.75	16	1.38	1 1/4	17	230
mm.		508	63.5	323.9		35.1	31.8	431.8	104
in.	12"	22	2.62	15	20	1.38	1 1/4	19.25	295
mm.		558.8	66.5	381		35.1	31.8	489	134
in.	14"	23.75	2.75	16.25	20	1.5	1 3/8	20.75	355
mm.		603.3	69.9	412.8		38.1	34.9	527.1	161
in.	16"	27	3	18.5	20	1.62	1 1/2	23.75	495
mm.		685.8	76.2	469.9		41.1	38.1	603.3	225
in.	18"	29.25	3.25	21	20	1.75	1 5/8	25.75	630
mm.		743	82.6	533.4		44.5	41.3	654.1	286
in.	20"	32	3.5	23	24	1.75	1 5/8	28.5	810
mm.		812.8	88.9	584.2		44.5	41.3	723.9	367
in.	24"	37	4	27.25	24	2	1 7/8	33	1250
mm.		939.8	101.6	692.2		50.8	47.6	838.2	567

Blind flange introduction

Blind flange is used in the two flange connection to block the pipeline equipment, such as a solid plate, or commonly used steel plate. The purpose is the test pressure of the pipeline equipment, leak testing, sealing the pipeline.
Product pipe size range of ½" to 96", flange grade range of 150 # to 10,000 #. Blind flange products feature a convex or annular tongue and groove joint liner surface. Blind flange products are available in A (MSS SP44) or B (API 605) series and meet ASME/ANSI B16.5 and B16.47 specifications.
The four main production processes are forging, casting, cutting and coiling.

Casting flange
Casting flange, the shape and size of the blank is accurate, the processing volume is small and the cost is low; the advantage is that it can make a more complex shape.

Forged flanges
Forging flange generally contains less carbon than casting flange is not easy to rust, forging streamline good, dense organization, mechanical properties better than casting flange.

Cut Flanges
The inner and outer diameter and thickness of the flange are cut directly on the middle plate, and then the bolt holes and waterline are processed. The flange produced in this way is called cut flange, and the maximum diameter of such flange is limited to the width of the plate.

Rolled flange
The process of cutting strips from the plate and then rolled into a circle is called rolling, mostly used in the production of some large flanges. After the successful rolling, welding, then flattening, and then the waterline and bolt hole processing.

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