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ASME B16.47 flange manufacturer in Dubai

How do you solve the manufacturing problems associated with an ASME B16.47 flange?

This American standard covers flanges from NPS 26 to 60 and states materials, dimensions, marking, testing, etc. Our company is an ASME B16.47 series B flange supplier in UAE with stringent quality control to enforce compliance and a custom portfolio.

We source products per tolerance norms to optimise the series B weld neck flange performance. The gasket thickness gets measured across the metallic region, excluding fillers.

How does the size of an ASME B16.47 series B flange affect its pressure rating?

Industrial clients acquire these flanges to handle ratings of 75 to 900. An ASME B16.47 Series B slip on flange should use the stated number of bolts and specified diameters.

Note: As the rating increases, the thickness, diameters, and bolting requirements go up.

No need to pay extra, when you can buy ASME B16.47 lap joint flange stockist with exact sizes

How does the installation of bolts affect the performance of an ASME B16.47 series A flange?

These flanges are heftier and take more load without leaks. An ASME B16.47 series A flange has larger bolt circle diameters than Series B. So, for instance, you need 28 bolts of 11/4” diameter for a 30-inch flange for ANSI B16.47 series A class 150 flanges.

Buy ASME B16.47 series A RTJ flange at factory price directly from a supplier in Dubai

Table of content

Specialized in manufacturing

ASME B16.47 Flange

ASME B16.47 is a standard for large diameter pipe flanges sized from NPS 26 through NPS 60.

Size

NPS 26 to NPS 60

Class

150 to 900

ASTM

A182, A105

ASME

B16.47

Technical Data

Dimension

ASME B16.47 Series A (MSS SP-44) & Series B (API 605)

Face Type

Flat Face (FF), Raise Face (RF), Ring Joint (RJT)

Coating

Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated.

ANSI B16.47 Flange Specification

Specifications	ASME B16.47 Flange
Certificate	ISO
Testing	Hydrostatic testing machine Magnetic particle detector Direct-reading Spectrograph UI trasonic flaw detector
Pressure Class	150 To 900
Methods Of Forging	Casting Forging Rolling Cutting
Size	NPS 1⁄₂" To NPS 48”
Supporting Material For Flanges	Gasket/ Ring Joint/ Flanges Bolts
Schedule	SCH 5S To XXS
Equipment	Pushing Machine Press machine electric bevelling machine
Available Packing	Packing In Plywood Box And Plywood Pallet

ASME B16.47 Flange Price List

Description	Price In US ($)
2 Inch, 600#, BL RF, ASME B16.47, SERIES A	US $1988.17 Per KG
4 Inch, 600#, BL, RF, ASME B16.47, SERIES A	US $331.39 Per KG
CL.150 ,SERIES B, B16.47, 750MM-30 DOUBLE FLANGED	US $11369.69 Per KG
CL.300, 900MM-36 DOUBLE FLANGED, ASME B16.47	US $26732.31 Per KG
150#, RF, SCH.STD, WNRF, ANSI B16.47/B	US $1243.55 Per KG
ASME B16.47, SERIES B, WNRF	US $1456.43 Per KG
CL.600, SERIES B, ASME B16.47, 750MM-30 DOUBLE FLANGED	US $279479.27 Per KG
CL.300, SERIES B, B16.47, 900MM-36 DOUBLE FLANGED	US $24153.85 Per KG
CL.300, B16.47, SERIES B. 750MM-30 DOUBLE FLANGE	US $45067.09 Per KG
CL.150, SERIES B, 1200MM-48 DOUBLE FLANGED	US $29821.41 Per KG
ASME B16.47. CL.600. SERIES B. 750MM-30H DOUBLE FLANGED	US $34391.94 Per KG
CL.600, SERIES B, ANSI B16.47, 800MM-32H DOUBLE FLANGED	US $39821.35 Per KG
SERIES B, B16.47, CL.600, 800MM-32H DOUBLE FLANGED	US $119464.04 Per KG
CL.600, SERIES A, ASME B16.47, 750MM-30H DOUBLE FLANGED	US $104001.96 Per KG
ASME B16.47, CL.300, SERIES B 900MM-36 DOUBLE FLANGED	US $26732.31 Per KG

Special price offer on series a and b flanges stock and several sizes available for purchase

Types Of ASME B16.47 Large Diameter Steel Flanges

ASME B16.47 Blind Flange

ASME B16.47 Slip On Flange

ASME B16.47 Weld Neck Flange

ASME B16.47 Series A Socket Weld Flanges

ASME B16.47 Series A Plate Flanges

ASME B16.47 Lap Joint Flanges

ANSI B16.47 RTJ Flanges

ASME B16.47 Series A Flanges

ASME B16.47 Series B Flanges

ASME B16.47 Series A RTJ Flanges

ASME B16.47 Series A Slip On Flanges

ASME B16.47 Large Diameter Flanges

Also check ASME B16.47 series b slip on flange dimensions and weight chart in FF, RTJ, RF face types

ASME B16 47 Series A Flange Dimensions

NPS	O.D.	(D)	(B) (WNRF)	(B) (BLRF)	(H)	(A)
26	660.4	870	66.7 68.3	66.7 68.3	119 120.6	676
28	711.2	925	69.9 71.5	69.9 71.5	124 125.6	727
30	762	985	73.1 74.7	73.1 74.7	135 136.6	781
32	812.8	1060	79.4 81	79.4 81	143 144.6	832
34	863.6	1110	81 82.6	81 82.6	148 149.6	883
36	914.4	1170	88.9 90.5	88.9 90.5	156 157.6	933
38	965.2	1240	85.8 87.4	85.8 87.4	156 157.6	991
40	1016	1290	88.9 90.5	88.9 90.5	162 163.6	1041
42	1066.8	1345	95.3 96.9	95.3 96.9	170 171.6	1092
44	1117.6	1405	100.1 101.7	100.1 101.7	176 177.6	1143
46	1168.4	1455	101.6 103.2	101.6 103.2	184 185.6	1197
48	1219.2	1510	106.4 108	106.4 108	191 192.6	1248
50	1270	1570	109.6 111.2	109.6 111.2	202 203.6	1302
52	1320.8	1625	114.3 115.9	114.3 115.9	208 209.6	1353
54	1371.6	1685	119.1 120.7	119.1 120.7	214 215.6	1403
56	1422.4	1745	122.3 123.9	122.3 123.9	227 228.6	1457
58	1473.2	1805	127 128.6	127 128.6	233 234.6	1508
60	1524	1855	130.2 131.8	130.2 131.8	238 239.6	1559

ANSI B16.47 Series A Class 150 Flanges Dimensions

NPS	O.D.	Wall Thickness (Minimum) Of (WNRF) (TF)	Wall Thickness (Minimum) Of (BLRL)) (TF)	Through Hub Length Of (Y)	Hub Base Diameter (X)	Top Hub Diameter (A	Diameter Of (R/F) (R)	Diameter Of Bolt Circle and Drilling	Bolts Holes Number
26	34.25	2.63	2.63	4.69	26.62	26	29.5	31.75	24
28	36.5	2.75	2.75	4.88	28.62	28	31.5	34	28
30	38.75	2.88	2.88	5.32	30.75	30	33.75	36	28
32	41.75	3.13	3.13	5.63	32.75	32	36	38.5	28
34	43.75	3.19	3.19	5.82	34.75	34	38	40.5	32
36	46	3.5	3.5	6.13	36.75	36	40.25	42.75	32
38	48.75	3.38	3.38	6.13	39	38	42.25	45.25	32
40	50.75	3.5	3.5	6.38	41	40	44.25	47.25	36
42	53	3.75	3.75	6.69	43	42	47	49.5	36
44	55.25	3.94	3.94	6.94	45	44	49	51.75	40
46	57.25	4	4	7.25	47.12	46	51	53.75	40
48	59.5	4.19	4.19	7.5	49.12	48	53.5	56	44
50	61.75	4.32	4.32	7.94	51.25	50	55.5	58.25	44
52	64	4.5	4.5	8.19	53.25	52	57.5	60.5	44
54	66.25	4.69	4.69	8.44	55.25	54	59.5	62.75	44
56	68.75	4.82	4.82	8.94	57.38	56	62	65	48
58	71	5	5	9.19	59.38	58	64	67.25	48
60	73	5.13	5.13	9.38	61.38	60	66	69.25	52

ASME B16.47 Series A Gasket Dimensions

NPS	Gasket Inner Diameter Of (D1)	Gasket Outer Diameter Of (D2)
NPS	Gasket Inner Diameter Of (D1)	Class 150	Class 300	Class 400	Class 600
26	660	775	835	832	867
28	711	832	899	892	914
30	762	883	953	946	972
32	813	940	1006	1003	1022
34	864	991	1057	1054	1073
36	914	1048	1118	1118	1130
38	965	1111	1054	1073	1105
40	1016	1162	1114	1127	1156
42	1067	1219	1165	1178	1219
44	1118	1276	1219	1232	1270
46	1168	1327	1273	1289	1327
48	1219	1384	1324	1346	1391
50	1270	1435	1378	1403	1448
52	1321	1492	1429	1454	1499
54	1372	1549	1492	1518	1556
56	1422	1607	1543	1568	1613
58	1473	1664	1594	1619	1664
60	1524	1715	1645	1683	1721

ASME B16.47 Series A RTJ Flange Dimensions

Ring Type Joint Size in (Inch)	Ring Type Joint Size in (MM)	Outer Diameter Of RTJ	WT Of Ring Type Joint	Outer Diameter Of Hub	Outer Diameter Of WNRF	Lengths Of Weld Neck	Diameter Of R/F	Height Of R/F	PCD	Diametr Of RTJ Pitch	Depth Of Ring Type Joint	RTJ Width
(A)	(B)	(C)	(D)	(E)	(F)	(G)	(H)	(I)	(J)	(K)	(L)	-
1/2	15	90	9.6	30	21.3	46	N/A	N/A	60.3	N/A	N/A	N/A
3/4	20	100	11.2	38	26.7	51	N/A	N/A	69.9	N/A	N/A	N/A
1	25	110	12.7	49	33.4	54	63.5	6.35	79.4	47.63	6.35	8.74
1 1/4	32	115	14.3	59	42.2	56	73	6.35	88.9	57.15	6.35	8.74
1 1/2	40	125	15.9	65	48.3	60	82.5	6.35	98.4	65.07	6.35	8.74
2	50	150	17.5	78	60.3	62	102	6.35	120.7	82.55	6.35	8.74
2 1/2	65	180	20.7	90	73	68	121	6.35	139.7	101.6	6.35	8.74
3	80	190	22.3	108	88.9	68	133	6.35	152.4	114.3	6.35	8.74
3 1/2	90	215	22.3	122	101.6	70	154	6.35	177.8	131.78	6.35	8.74
4	100	230	22.3	135	114.3	75	171	6.35	190.5	149.23	6.35	8.74
5	125	255	22.3	164	141.3	87	194	6.35	215.9	171.45	6.35	8.74
6	150	280	23.9	192	168.3	87	219	6.35	241.3	193.68	6.35	8.74
8	200	345	27	246	219.1	100	273	6.35	298.5	247.65	6.35	8.74
10	250	405	28.6	305	273	100	330	6.35	362	304.8	6.35	8.74
12	300	485	30.2	365	323.8	113	406	6.35	431.8	381	6.35	8.74
14	350	535	33.4	400	355.6	125	425	6.35	476.3	396.88	6.35	8.74
16	400	595	35	457	406.4	125	483	6.35	539.8	454.03	6.35	8.74
18	450	635	38.1	505	457.2	138	546	6.35	577.9	517.53	6.35	8.74
20	500	700	41.3	559	508	143	597	6.35	635	558.8	6.35	8.74
24	600	815	46.1	663	610	151	711	6.35	749.3	673.1	6.35	8.74

ASME B16 47 Series A Flange Weight

Normal Pipe Size	150 LB		300 LB		600 LB		900 LB
Normal Pipe Size	(Weld Neck (WN))	(Blind (BL)	(Weld Neck (WN))	(Blind (BL)	(Weld Neck (WN))	(Blind (BL)	(Weld Neck (WN))	(Blind (BL)
22	109	162	204	284	310	437	-	-
26	154	321	291	477	450	777	890	1100
28	175	380	352	584	506	909	1055	1350
30	204	450	405	685	575	1074	1230	1610
32	254	560	465	793	642	1253	1480	1940
34	273	625	523	919	705	1427	1750	2310
36	321	760	580	1072	800	1665	1997	2660
38	358	830	324	900	674	1509	2000	2690
40	386	925	391	1066	725	1695	2161	2950
42	442	1080	428	1206	895	2028	2379	3280
44	491	1230	485	1378	951	2246	3321	3810
46	525	1345	559	1570	1055	2543	3224	4430
48	580	1520	597	1745	1247	2951	3500	4860
50	624	1668	674	1983	1423	3381	-	-
52	689	1867	728	2194	1493	3682	-	-
54	760	2088	871	2538	1637	4091	-	-
56	845	2308	921	2728	1843	4585	-	-
58	923	2554	968	2975	1954	4986	-	-
60	971	2765	1032	3250	2353	5750	-	-

ASME B16 47 Slip On Flange Dimensions

NPS	I.D.	O.D.	Bolts Circle	Raised	R/F	Hight (H)	WT Of R/F	(T1)	Thickness2 (F/F)	Bolts Holes	No. Of Bolt Hole
1/2	0.88	3.50	2.38	1.38	.063	1.19	.62	.38	.56	.62	4
3/4	1.09	3.88	2.75	1.69	.063	1.50	.62	.44	.56	.62	4
1	1.36	4.25	3.12	2.00	.063	1.94	.69	.50	.63	.62	4
1-1/4	1.70	4.62	3.50	2.50	.063	2.31	.81	.56	.75	.62	4
1-1/2	1.97	5.00	3.88	2.88	.063	2.56	.88	.62	.82	.62	4
2	2.44	6.00	4.75	3.62	.063	3.06	1.00	.69	.94	.75	4
2-1/2	2.94	7.00	5.50	4.12	.063	3.56	1.12	.82	1.06	.75	4
3	3.57	7.50	6.00	5.00	.063	4.25	1.19	.88	1.13	.75	4
3-1/2	4.07	8.50	7.00	5.50	.063	4.81	1.25	.88	1.19	.75	8
4	4.57	9.00	7.50	6.19	.063	5.31	1.31	.88	1.25	.75	8
5	5.66	10.00	8.50	7.31	.063	6.44	1.44	.88	1.38	.88	8
6	6.72	11.00	9.50	8.50	.063	7.56	1.56	.94	1.50	.88	8
8	8.72	13.50	11.75	10.62	.063	9.69	1.75	1.06	1.69	.88	8
10	10.88	16.00	14.25	12.75	.063	12.00	1.94	1.13	1.88	1.00	12
12	12.88	19.00	17.00	15.00	.063	14.38	2.19	1.19	2.13	1.00	12
14	14.14	21.00	18.75	16.25	.063	15.75	2.25	1.32	2.19	1.12	12
16	16.16	23.50	21.25	18.50	.063	18.00	2.50	1.38	2.44	1.12	16
18	18.18	25.00	22.75	21.00	.063	19.88	2.69	1.50	2.63	1.25	16
20	20.20	27.50	25.00	23.00	.063	22.00	2.88	1.63	2.83	1.25	20
22	22.22	29.50	27.25	25.25	.063	24.25	3.13	1.75	3.07	1.38	20
24	24.25	32.00	29.50	27.25	.063	26.12	3.25	1.82	3.19	1.38	20

ASME B16 47 Blind Flange Dimensions

NPS In Inch	Outside Diameter Of (A)	WT Of (B)	Dai. Of R/F (C)	Bolts Circle Of D	# Bolts Holes	Daimeter Of Bolts Holes	Weight As Per Kilogram
1/2	3-1/2	7/16	1-3/8	2-3/8	4	5/8	2
3/4	3-7/8	1/2	1-11/16	2-3/4	4	5/8	2
1	4-1/4	9/16	2	3-1/8	4	5/8	2
1-1/4	4-5/8	5/8	2-1/2	3-1/2	4	5/8	3
1-1/2	5	11/16	2-7/8	3-7/8	4	5/8	3
2	6	3/4	3-5/8	4-3/4	4	3/4	4
2-1/2	7	7/8	4-1/8	5-1/2	4	3/4	7
3	7-1/2	15/16	5	6	4	3/4	9
3-1/2	8-1/2	15/16	5-1/2	7	8	3/4	13
4	9	15/16	6-3/16	7-1/2	8	3/4	17
5	10	15/16	7-5/16	8-1/2	8	7/8	20
6	11	1	8-1/2	9-1/2	8	7/8	27
8	13-1/2	1-1/8	10-5/8	11-3/4	8	7/8	47
10	16	1-3/16	12-3/4	14-1/4	12	1	67
12	19	1-1/4	15	17	12	1	123
14	21	1-3/8	16-1/4	18-3/4	12	1-1/8	139
16	23-1/2	1-7/16	18-1/2	21-1/4	16	1-1/8	187
18	25	1-9/16	21	22-3/4	16	1-1/4	217
20	27-1/2	1-11/16	23	25	20	1-1/4	283
24	32	1-7/8	27-1/4	29-1/2	20	1-3/8	415

Bolt Length For ASME B16.47 Flange

NPS In Inch	150# In Inches		300# In Inches		400# In Inches		600# In Inches		900# In Inches
NPS In Inch	D	L	D	L	D	L	D	L	D	L
26	3/4	5-1/2	1-1/4	10-1/2	1-3/8	11-1/4	1-5/8	13-3/4	2-1/2	17-1/4
28	3/4	5-3/4	1-1/4	10-1/2	1-1/2	12	1-3/4	14-1/4	2-3/4	19
30	3/4	5-3/4	1-3/8	11-1/4	1-1/2	12-1/2	1-7/8	15-1/4	3	20
32	3/4	5-3/4	1-1/2	12-1/4	1-5/8	13-1/2	2	15-3/4	3	20-1/4
34	7/8	6-1/4	1-1/2	12-1/4	1-5/8	13-3/4	2-1/4	17-1/4	3-1/4	21-3/4
36	7/8	6-3/4	1-5/8	12-1/2	1-3/4	15-1/2	2-1/4	17-3/4	3	21-1/4"s
38	1	7-1/4	1-5/8	13-1/4	-	-	-	-	-	-
40	1	7-1/4	1-5/8	13-1/2	-	-	-	-	-	-
42	1	7-1/2	1-3/4	14	-	-	-	-	-	-
44	1	7-3/4	1-3/4	14-3/4	-	-	-	-	-	-
46	1-1/8	8	1-7/8	15	-	-	-	-	-	-
48	1-1/8	8-1/4	1-7/8	15	-	-	-	-	-	-
50	1-1/8	8-1/2	1-7/8	15-3/4	-	-	-	-	-	-
52	1-1/8	8-3/4	1-7/8	16	-	-	-	-	-	-
54	1-1/8	8-3/4	1-7/8	15-3/4	-	-	-	-	-	-
56	1-1/8	9	2-1/4	17-3/4	-	-	-	-	-	-
58	1-1/4	9-1/4	2-1/4	17-3/4	-	-	-	-	-	-
60	1-1/4	9-1/2	2-1/4	17-1/2	-	-	-	-	-	-

Pressure Rating Of Large Diameter Flange

Temperature (Dedgree C)	Class Of Flanges
Temperature (Dedgree C)	(150#)	(300#)	(400#)	(600#)	(900#)	(1500#)	(2500#)
-29 - 38	19.8	51.7	68.9	103.4	155	259	431
50	19.5	51.7	68.9	103.4	155	259	431
100	17.7	51.5	68.7	103.0	155	258	429
150	15.8	50.2	66.8	100.3	151	251	418
200	13.8	48.6	64.8	97.2	146	243	405
250	12.1	46.3	61.7	92.7	139	232	386
300	10.2	42.9	57.0	85.7	129	214	357
325	9.3	41.4	55.0	82.6	124	207	344
350	8.4	40.0	53.4	80.0	120	200	334
375	7.4	37.8	50.4	75.7	114	189	315
400	6.5	34.7	46.3	69.4	104	174	290
425	5.5	28.8	38.4	57.5	86.3	144	240
450	4.6	23.0	30.7	46.0	69.0	115	192
475	3.7	17.1	22.8	34.2	51.3	85.4	142
500	2.8	11.6	15.4	23.2	34.7	57.9	96.5
538	1.4	5.9	7.9	11.8	17.7	29.5	49.2

ASME B16.47 Series B Flange Dimensions

NPS	Outside Diameter	(D)	(B) (WN)	(B) (BLRF)	(H)	(A)
26	661.9	785	39.8 41.4	43 44.6	87 88.6	684
28	712.7	835	43 44.6	46.2 47.8	94 95.6	735
30	763.5	885	43 44.6	49.3 50.9	98 99.6	787
32	814.3	940	44.6 46.2	52.5 54.1	106 107.6	840
34	865.1	1005	47.7 49.3	55.7 57.3	109 110.6	892
36	915.9	1055	50.9 52.5	57.3 58.9	116 117.6	945
38	968.2	1125	52.5 54.1	62 63.6	122 123.6	997
40	1019	1175	54.1 55.7	65.2 66.8	127 128.6	1049
42	1069.8	1225	57.3 58.9	66.8 68.4	132 133.6	1102
44	1120.6	1275	58.9 60.5	70 71.6	135 136.6	1153
46	1171.4	1340	60.4 62	73.1 74.7	143 144.6	1205
48	1222.2	1390	63.6 65.2	76.3 77.9	148 149.6	1257
50	1273	1445	66.8 68.4	79.5 81.1	152 153.6	1308
52	1323.8	1495	68.4 70	82.7 84.3	156 157.6	1360
54	1374.6	1550	70 71.6	85.8 87.4	160 161.6	1413
56	1425.4	1600	71.6 73.2	89 90.6	165 166.6	1465
58	1476.2	1675	73.1 74.7	91.9 93.5	173 174.6	1516
60	1527	1725	74.7 76.3	95.4 97	178 179.6	1570

ASME B16.47 Series B Class 150 Dimensions

Normal Pipe Size	Outside Diameter	Minimum (Wall Thickness)		O.D. of (R/F)	Diameter Of Hub	Length Of Thru Hub	Weight As Per LBS		Drilling
Normal Pipe Size	Outside Diameter	WNRF	BLRF	O.D. of (R/F)	Diameter Of Hub	WNRF	WNRF	BLRF	Holes Number	Diameter Of Holes	Bolts Circle Dia.
26	30	1.25	1.25	27.75	26.63	2.25	80	255	36	0.75	28.50
28	32	1.25	1.25	29.75	28.63	2.38	85	290	40	0.75	30.50
30	34	1.25	1.25	31.75	30.63	2.50	90	330	44	0.75	32.50
32	36	1.32	1.38	33.75	32.63	2.69	105	390	48	0.75	34.50
34	38	1.32	1.44	35.75	34.63	2.82	110	430	52	0.75	36.50
36	40.69	1.38	1.61	38	36.81	3.32	145	58	40	0.75	39.06
38	42.69	1.44	1.69	40	38.81	3.44	160	595	40	0.88	41.06
40	44.69	1.44	1.69	42	40.81	3.57	170	760	44	0.88	43.06
42	16.69	1.50	1.82	44	42.81	3.69	185	895	48	0.88	45.06
44	49.25	1.63	1.88	46.25	44.88	4.07	230	1065	36	1	47.38
46	51.25	1.69	1.94	48.25	46.88	4.19	245	1185	40	1	49.38
48	53.25	1.75	2.07	50.25	48.88	4.32	270	1315	44	1	51.38
50	55.25	1.82	2.13	52.25	50.94	4.50	290	1505	44	1	53.38
52	57.38	1.82	2.19	54.25	52.94	4.69	310	1665	48	1	55.50
54	59.38	1.88	2.31	56.25	55	4.88	340	1840	48	1	57.50
56	62	1.94	2.38	58.50	57.13	5.25	400	2110	40	1.12	59.88
58	64	2	2.44	60.50	59.13	5.38	430	2300	44	1.12	61.88
60	66	2.13	2.56	62.50	61.13	5.63	475	2500	44	1.12	63.88

ASME B16 47 Series B Flange Weight

Normal Pipe Size	Class 150		Class 300		Class 600
WNF	BLRF	WNF	BLRF	WNF	BLRF	WNF
26	65	165	193	404	260	534
28	75	200	211	457	305	637
30	82	226	258	555	378	793
32	94	263	315	693	436	925
34	113	320	339	765	550	1150
36	128	374	380	858	591	1290
38	153	434	425	1005	668	1481
40	166	489	459	1132	718	1662
42	182	560	514	1280	888	1989
44	195	626	567	1466	942	2188
46	229	709	666	1657	1046	2458
48	248	799	687	1772	1237	2859
50	268	899	797	2029	1412	3280
52	284	985	806	2230	1481	3573
54	309	1081	840	2310	1623	3949
56	329	1181	1117	2891	1829	4423
58	391	1322	1194	3093	1939	4791
60	414	1430	1215	3213	2336	5533

What types of gaskets are used with ASME B16.47 series B slip on flange?

Often used in refurbished systems, an ASME B16.47 series B slip on flange has a smaller bolt circle diameter. It reduces post-installation movement. Generally, these compact flanges get preferred for lower criticality.

Customers can use spiral wound or jacketed gaskets. The manufacturer must use appropriate tolerances for the outside/inside diameters and the centering ring. For example, for NPS 26 to 34, the level for the inner diameter is ±0.03”. Notably, ring type joints are unavailable for Series B.

What is the recommended procedure for inspecting a B16.47 series B blind flange?

Blind flanges can seal piping sections for repair and maintenance actions. A B16.47 series B blind flange is usually not subject to non-destructive inspection, or NDI. The standard procedure is only a precautionary measure of the thickness.

How are large diameter flanges tested and certified for use in various applications?

Integrated testing of large diameter flanges ensures leaks, defects, contamination, corrosion, etc., are absent. Manufacturers perform radiography and ultrasonic testing to ascertain the quality. They also assess the mechanical properties via tension and hardness tests.

Customers should verify the quality through the MTC and Raw Materials Certificate or issue a third-party examination.