Korean Flanges And Gost 12821 Flange Dimensions

Well-known Korean Flanges Manufacturer In India And KS B1503 Flange Pressure Rating.

Korean Standard Flange

Korean Flanges Manufacturer

KS B1503 10k-16k Flanges

Gost Standard Flanges

Gost 12821 Flange

Gost 33259 Flange

Korean Standard Flange Specification
Korean Flanges Dimensions
KS B1503 5k Flange Dimensions
KS B1503 10k Flange Dimensions
KS B1503 16k Flange Dimensions
KS B1503 20k Flange Dimensions

Russian-Standard Flange Dimensions

Gost /гост 12820 PN16 Plane/ Flat Flange Dimensions (1.6mpa)
Gost /гост 12821 PN16 Welding Neck Flange Dimensions (1.6mpa)
Gost /гост 12836 PN16 Blind Flange Dimensions (1.6mpa)

KS B1503 10K-16K Flanges Schedule Chart
Flange Gost 12820 Pressure Rating Class
Gost 33259 Flange Thickness Calculation
Gost 12821 Weld Neck Flange Bolt Chart
Buy Type Of Korean And Gost Standard Flange For Piping Connection

Material Specification Of Korean Standards Flange, We Deliver High Quality Gost 12821 Flange In Mumbai, India.

Rajtilak Metal is a Dominant S B 1503 5K-40K Flange Manufacturers In India. We offer immediate delivery programs for standard size of Stainless Steel Korean Flanges & ks b 1503 flange. Carbon Steel Korean Flanges can be manufactured as per custom size requirements of our customers. We are also known as Ks B 1503 Flanges supplier with high quality raw material in various sizes. Check Korean Weld Neck Flanges dimensions in Mm.

Korean Standard Flange Specification

Material Specification Of :	Korean & Gost Flanges
High Temperature	Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature	Above -29 Degree C (−20°F)
Common Types Of Flanges:	Slip On (SORF), Weld Neck (WNRF), Blind (BLRF), Lap Joint (Loose), Threaded (NPT), Socket-Weld (SWRF)
Special Types Of Flanges :	Nipoflange, Elboflange, Latroflange, Swivel Flanges, Expanding Flanges, Reducing Flanges, Weldoflange
Marking Standard	Name of Manufacturer Schedule Type of Flange Facing Nominal Pipe Size Pressure Class ASME B16 Designation
Standard Cover :	pressure ratings & temperature ratings, materials, marking, dimensions, weight, tolerances, testing
Contact Faces	RTJ (Ring Type Joint), FF (Flat Face), RF (Raised Face), T/G (Tongue And Groove ), M/F (Male And Female)
Size Chart	Normal Pipe Size 1/2 to NPS 24"
Materials	Stainless Steel (Grade 304/L, 316/L), Carbon Steel (ASTM A105 And ASTM A350), Alloy Steel (ASTM A182), Mild Steel, Duplex Steel, Pressure Vessel Steel, Titanium, Super Duplex Steel, Nickel Alloy, Monel, Inconel, Hastelloy, Copper Nickel, Cast Iron, Wrought Iron.
Thickness	Normal Pipe Size ≤ 18
Bore Diameter	Normal Pipe ≤ 10
Flanges Standards	EN 1092-1, JIS, ASME B16.5, ASME B16.47 type A, UNI, DIN
Pressure Rating	Class 150 To Class 2500
Bolt Type	high strength bolts medium strength bolts low strength bolts
European Standard Flanges	JIS B2220 Flanges (5k to 30k) and KS1503 flanges
Russian-Standard Flanges	GOST 12820 / 12821-80, DIN, UNI, EN 1092-1
South African Standard Flanges	SANSflanges And SABS flanges
Surface Finish	smooth, concentric serrated, stock
Gaskets Types	Full Face Gasket Flat Ring Gasket Metallic Ring Gakset
Advantages Of Pipe Flanges	Used to Connect Pipe System Easy Repair Pipe System Assembled Without Welding

Korean Flanges Dimensions

KS B1503 5k Flange Dimensions

Nominal Diameter of Flanges	Outside Diameter of Flanges D	flange Sectional Dimensions												Size Of Bolt	Welding
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside Dia. Of Flange do	Outside Diameter Of Applicable pipe	t	T	Hub Diameter		Radius r	Raised Face f	Hole Diameter Of H	Bolt Holes Number		Welding
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside Dia. Of Flange do	Outside Diameter Of Applicable pipe	t	T	a	b	Radius r	Raised Face f	Hole Diameter Of H	Bolt Holes Number		W1	W2
10	75	55	39	17.8	17.3	9	–	–	–	–	1	12	4	M10	5	2.5
15	80	60	44	22.2	21.7	9	–	–	–	–	1	12	4	M10	5	3
20	85	65	49	27.7	27.2	10	–	–	–	–	1	12	4	M10	5	3
25	95	75	59	34.5	34	10	–	–	–	–	1	12	4	M10	5	3
32	115	90	70	43.2	42.7	12	–	–	–	–	2	15	4	M12	6	3
40	120	95	75	49.1	48.6	12	–	–	–	–	2	15	4	M12	6	3
50	130	105	85	61.1	60.5	14					2	15	4	M12	6	3
65	155	130	110	77.1	76.3	14					2	15	4	M12	6	4
80	180	145	121	90	89.1	14					2	19	4	M16	6	4
90	190	155	131	102.6	101.6	14					2	19	4	M16	6	4
100	200	165	141	115.4	114.3	16					2	19	8	M16	7	4
125	235	200	176	141.2	139.8	16					2	19	8	M16	7	4
150	265	230	206	166.6	165.2	18					2	19	8	M16	7	5
175	300	260	232	192.1	190.7	18					2	23	8	M20	7.5	5
200	320	280	252	218	216.3	20					2	23	8	M20	8.5	6
225	345	305	277	243.7	241.8	20					2	23	12	M20	9	6
250	385	345	317	269.5	267.4	22					2	23	12	M20	10	6
300	430	390	360	321	318.5	22					3	23	12	M20	10	6
350	480	435	403	358.1	355.6	24					3	25	12	M22	12	7
400	540	495	463	409	406.4	24					3	25	16	M22	12	7
450	605	555	523	460	457.2	24	40	495	500	5	3	25	16	M22	12	7
500	655	605	573	511	508	24	40	546	552	5	3	25	20	M22	12	7
550	720	665	630	562	558.8	26	42	597	603	5	3	27	20	M24	12	7
600	770	715	680	613	609.6	26	44	648	654	5	3	27	20	M24	12	7
650	825	770	735	664	660.4	26	48	702	708	5	3	27	24	M24	12	7
700	875	820	785	715	711.2	26	48	751	758	5	3	27	24	M24	12	7
750	945	880	840	766	762	28	52	802	810	5	3	33	24	M30	12	7
800	995	930	890	817	812.8	28	52	854	862	5	3	33	24	M30	13	8
850	1045	980	940	868	863.6	28	54	904	912	5	3	33	24	M30	13	8
900	1095	1030	990	919	914.4	30	56	956	964	5	3	33	24	M30	13	8
1000	1195	1130	1090	1021	1016	32	60	1058	1066	5	3	33	28	M30	14	9
*(1100)	1305	1240	1200	1123	1117.6	32					3	33	28	M30
*1200	1420	1350	1305	1225	1219.2	34			–	–	3	33	32	M30
*1350	1575	1505	1460	–	1371.6	34	–	–	–	–	3	33	32	M30
*1500	1730	1660	1615	–	1524	36	–	–	–	–	3	33	36	M30

KS B1503 10k Flange Dimensions

Nominal Diameter of Flanges	Outside Diameter of Flanges D	flange Sectional Dimensions												Size Of Bolt	Welding
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside DaimeterOf Flange do	O.D. Of Applicable pipe	t	T	Hub Diameter		Radius r	Raised Face f	Hole Diameter Of H	Bolt Holes Number		Welding
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside DaimeterOf Flange do	O.D. Of Applicable pipe	t	T	a	b	Radius r	Raised Face f	Hole Diameter Of H	Bolt Holes Number		W1	W2
10	90	65	46	17.8	17.3	12	–	–	–	–	1	15	4	M12	5	2.5
15	95	70	51	22.2	21.7	12	–	–	–	–	1	15	4	M12	5	3
20	100	75	56	27.7	27.2	14	–	–	–	–	1	15	4	M12	5	3
25	125	90	67	34.5	34	14	–	–	–	–	1	19	4	M16	5	3
32	135	100	76	43.2	42.7	16	–	–	–	–	2	19	4	M16	6	3
40	140	105	81	49.1	48.6	16	–	–	–	–	2	19	4	M16	6	3
50	155	120	96	61.1	60.5	16	–	–	–	–	2	19	4	M16	6	3
65	175	140	116	77.1	76.3	18	–	–	–	–	2	19	4	M16	6.5	4
80	185	150	126	90	89.1	18	–	–	–	–	2	19	8	M16	6.5	4
-90	195	160	136	102.6	101.6	18	–	–	–	–	2	19	8	M16	6.5	4
100	210	175	151	115.4	114.3	18	–	–	–	–	2	19	8	M16	7	4
125	250	210	182	141.2	139.8	20	–	–	–	–	2	23	8	M20	7.5	4
150	280	240	212	166.6	165.2	22	–	–	–	–	2	23	8	M20	8	5
-175	305	265	237	192.1	190.7	22	–	–	–	–	2	23	12	M20	9	5
200	330	290	262	218	216.3	22	–	–	–	–	2	23	12	M20	9	6
-255	350	310	282	243.7	241.8	22	–	–	–	–	2	23	12	M20	9	6
250	400	355	324	269.5	267.4	24	36	288	292	6	2	25	12	M22	10	6
300	445	400	368	321	318.5	24	38	340	346	6	3	25	16	M22	10	6
350	490	445	413	358.1	355.6	26	42	380	386	6	3	25	16	M22	12	7
400	560	510	475	409	406.4	28	44	436	442	6	3	27	16	M24	12	7
450	620	565	530	460	457.2	30	48	496	502	6	3	27	20	M24	14	8
500	675	620	585	511	508	30	48	548	554	6	3	27	20	M24	14	8
550	745	680	640	562	558.8	32	52	604	610	6	3	33	20	M30	15	9
600	795	730	690	613	609.6	32	52	656	662	6	3	33	24	M30	16	10
650	845	780	740	664	660.4	34	56	706	712	6	3	33	24	M30	16	10
700	905	840	800	715	711.2	34	58	762	770	6	3	33	24	M30	17	10
750	970	900	855	766	762	36	62	816	824	6	3	33	24	M30	18	11
800	1020	950	905	817	812.8	36	64	868	876	6	3	33	28	M30	19	12
-850	1070	1000	955	868	863.6	36	66	920	928	6	3	33	28	M30	19	12
900	1120	1050	1005	919	914.4	38	70	971	979	6	3	33	28	M30	22	14
1000	1235	1160	1110	1021	1016	40	74	1073	1081	6	3	39	28	M36	22	14
*(1100)	1345	1270	1220	1123	1117.6	42	–	–	–	–	3	39	28	M36
*1200	1465	1380	1325	1225	1219.2	44	–	–	–	–	3	39	32	M36
*1350	1630	1540	1480	–	1371.6	48	–	–	–	–	3	45	36	M42
*1500	1795	1700	1635	–	1524	50	–	–	–	–	3	45	40	M42

KS B1503 16k Flange Dimensions

Nominal Diameter of Flanges	Outside Diameter of Flanges D	flange Sectional Dimensions												Size Of Bolt
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside DaimeterOf Flange do	O.D. Of Applicable pipe	t	T	Hub Diameter		Radius r	Raised Face f	Hole Diameter Of H	Bolt Holes Number
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside DaimeterOf Flange do	O.D. Of Applicable pipe	t	T	a	b	Radius r	Raised Face f	Hole Diameter Of H	Bolt Holes Number
10	90	65	46	17.8	17.3	12	16	26	28	4	1	15	4	M12
15	95	70	51	22.2	21.7	12	16	30	32	4	1	15	4	M12
20	100	75	56	27.7	27..2	14	20	38	42	4	1	15	4	M12
25	125	90	67	34.5	34	14	20	46	50	4	1	19	4	M16
32	135	100	76	43.2	42.7	16	22	56	60	5	2	19	4	M16
40	140	105	81	49.1	48.6	16	24	62	66	5	2	19	4	M16
50	155	120	96	61.1	60.5	16	24	76	80	5	2	19	8	M16
65	175	140	116	77.1	76.3	18	26	94	98	5	2	19	8	M16
80	200	160	132	90	89.1	20	28	108	112	6	2	23	8	M20
-90	210	170	145	102.6	101.6	20	30	120	124	6	2	23	8	M20
100	225	185	160	115.4	114.3	22	34	134	138	6	2	23	8	M20
125	270	225	195	141.2	139.8	22	34	164	170	6	2	25	8	M22
150	305	260	230	166.6	165.2	24	38	196	202	6	2	25	12	M22
200	350	305	275	218	216.3	26	40	244	252	6	2	25	12	M22
250	430	380	345	269.5	267.4	28	44	304	312	6	2	27	12	M24
300	480	430	395	321	318.5	30	48	354	364	8	3	27	16	M24
350	540	480	440	358.1	355.6	34	52	398	408	8	3	33	16	M30X3
400	605	540	495	409	406.4	38	60	446	456	10	3	33	16	M30X3
450	675	605	560	460	457.2	40	64	504	514	10	3	33	20	M30X3
500	730	660	615	511	508	42	68	558	568	10	3	33	20	M30X3
-550	795	720	670	562	558.8	44	70	612	622	10	3	39	20	M36X3
600	845	770	720	613	609.6	46	74	666	676	10	3	39	24	M36X3
-650	895	820	770	664	660.4	48	77	704	726	10	5	39	24	M36X3
700	960	875	820	715	711.2	50	80	754	776	10	5	42	24	M39X3
-750	1020	935	880	766	762	52	83	806	832	10	5	42	24	M39X3
800	1085	990	930	817	812.8	54	86	865	885	10	5	48	24	M45X3
-850	1135	1040	980	868	863.6	56	89	916	936	10	5	48	24	M45X3
900	1185	1090	1030	919	914.4	58	93	968	986	10	5	48	28	M45X3
1000	1320	1210	1140	1021	1016	62	99	1070	1098	12	5	56	28	M52X3
-1100	1420	1310	1240	1123	1117.6	66	105	1180	1200	12	5	56	32	M52X3
1200	1530	1420	1350	1225	1219.2	70	112	1282	1302	12	5	56	32	M52X3

KS B1503 20k Flange Dimensions

Nominal Diameter of Flanges	Outside Diameter of Flanges D	flange Sectional Dimensions														Reference
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside DaimeterOf Flanges do	O.D. of Steel pipe	t	T	Hub Diameter		Radius r	f	D	Bolt Holes Number	Holes Dia. H	SIZE Of Bolt	S1	M	S2	N	L
		Diameter of Bolt Circle C	Diameter Of raised Face g	Inside DaimeterOf Flanges do	O.D. of Steel pipe	t	T	a	b	Radius r	f	D	Bolt Holes Number	Holes Dia. H	SIZE Of Bolt	S1	M	S2	N	L
10	90	65	46	17.8	17.3	14	20	30	32	4	1	–	4	15	M12	27	4	27	4	–
15	95	70	51	22.2	21.7	14	20	34	36	4	1	–	4	15	M12	31	4	31	4	–
20	100	75	56	27.7	27.2	16	22	40	42	4	1	–	4	15	M12	37	4	37	4	–
25	125	90	67	34.5	34	16	24	48	50	4	1		4	19	M16	44	4	44	4.5	–
32	135	100	76	43.2	42.7	18	26	56	60	5	2	–	4	19	M16	52	4	53	5	–
40	140	105	81	49.1	48.6	18	26	62	66	5	2	–	4	19	M16	58	4	59	5.5	–
50	155	120	96	61.1	60.5	18	26	76	80	5	2	–	8	19	M16	70	4	72	5.5	–
65	175	140	116	77.7	76.3	20	30	100	104	5	2	65.9	8	19	M16	94	6	–	–	6
80	200	160	132	90	89.1	22	34	113	117	6	2	78.1	8	23	M20	107	6	–	–	6
-90	210	170	145	102.6	101.6	24	36	126	130	6	2	90.2	8	23	M20	120	6	–	–	6
100	225	185	160	115.4	114.3	24	36	138	142	6	2	102.3	8	23	M20	132	6	–	–	6
125	270	225	195	141.2	139.8	26	40	166	172	6	2	126.6	8	25	M22	160	7	–	–	6
150	305	260	230	166.6	165.2	28	42	196	202	6	2	151	12	25	M22	186	8	–	–	6
200	350	305	275	218	216.3	30	46	244	252	6	2	199.9	12	25	M22	237	9	–	–	6
250	430	380	345	269.5	267.4	34	52	304	312	6	2	248.8	12	27	M24	290	10	–	–	6
300	480	430	395	321	318.5	36	56	354	364	8	3	297.9	16	27	M24	345	11	–	–	6
350	540	480	440	358.1	355.6	40	62	398	408	8	3	333.4	16	33	M30X3	384	12	–	–	6
400	605	540	495	409	406.4	46	70	446	456	10	3	381	16	33	M30X3	437	13	–	–	7
450	675	605	560	460	457.2	48	78	504	514	10	3	431.8	20	33	M30X3	490	15	–	–	7
500	730	660	615	511	508	50	84	558	568	10	3	482.6	20	33	M30X3	544	16	–	–	7
-550	795	720	670	562	558.8	52	90	612	622	10	3	533.4	20	39	M36X3	595	16	–	–	7
600	845	770	720	613	609.6	54	96	666	676	10	3	584.2	24	39	M36X3	646	18	–	–	7
*650	945	850	790	664	660.4	60					5		24	48	M45X3
*700	995	900	840	715	711.2	64					5		24	48	M45X3
*750	1080	970	900	766	762	68					5		24	56	M52X3
*800	1140	1030	960	817	812.8	72					5		24	56	M52X3
*850	1200	1090	1020	868	863.6	74					5		24	56	M52X3
*900	1250	1140	1070	919	914.4	76					5		28	56	M52X3

Gost /гост 12820 PN16 Plane/ Flat Flange Dimensions (1.6mpa)

Dn, Millimeter	D, Millimeter	D1, Millimeter	dв, Millimeter	b, Millimeter	d, Millimeter	n-￠	Kilogram
15	95	65	19	12	14	4	0,61
20	105	75	26	14	14	4	0,86
25	115	85	33	16	14	4	1,17
32	135	100	39	16	18	4	1,58
40	145	110	46	17	18	4	1,96
50	160	125	59	19	18	4	2,58
65	180	145	78	21	18	4	3,42
80	195	160	91	21	18	4	3,71
100	215	180	110	23	18	8	4,73
125	245	210	135	25	18	8	6,38
150	280	240	161	25	22	8	7,81
200	335	295	222	27	22	12	10,10
250	405	355	273	28	26	12	14,49
300	460	410	325	28	26	12	17,78
350	520	470	377	30	26	16	22,88
400	580	525	426	34	30	16	31,00
500	710	650	530	44	33	20	57,01
600	840	770	630	45	39	20	80,03
800	1 020	950	820	49	39	24	104,41
1000	1255	1170	1 020	58	45	28	179,37
1200	1485	1390	1220	71	52	32	297,78

Gost /гост 12821 PN16 Welding Neck Flange Dimensions (1.6mpa)

Dn, Millimeter	D, Millimeter	D1, Millimeter	d, Millimeter	Dm, Millimeter	Dn, Millimeter	d1, Millimeter	b, Millimeter	h4, Millimeter	n-￠	Kilogram
15	95	65	14	30	19	12	12	33	4	0,68
20	105	75	14	38	26	18	12	36	4	0,87
25	115	85	14	45	33	25	12	38	4	1,05
32	135	100	18	55	39	31	13	40	4	1,54
40	145	110	18	64	46	38	13	42	4	1,85
50	160	125	18	76	58	49	13	45	4	2,28
65	180	145	18	94	77	66	15	47	4	3,19
80	195	160	18	110	90	78	17	50	4	4,21
100	215	180	18	130	110	96	17	50	8	4,90
125	245	210	18	156	135	121	19	57	8	6,75
150	280	240	22	180	161	146	19	57	8	8,30
200	335	295	22	240	222	202	21	58	12	11,79
250	405	355	26	292	278	254	23	65	12	17,36
300	460	410	26	346	330	303	24	66	12	22,76
350	520	470	26	400	382	351	28	70	16	32,04
400	580	525	30	450	432	398	32	75	16	43,00
500	710	650	33	559	535	501	38	90	20	70,97
600	840	770	39	660	636	602	41	90	20	99,30
800	1020	950	39	850	826	792	45	95	24	130,57
1 000	1255	1170	45	1060	1 028	992	49	110	28	203,39
1200	1485	1390	52	1268	1228	1192	51	125	32	284,94

Gost /гост 12836 PN16 Blind Flange Dimensions (1.6mpa)

Normal Pipe Size	Weight In Kilogram	D	D1	Number OF Holes	h	D4	b	D3	D2	h1
15	95	65	45	12	10	14	2	2	4	0.43
20	105	75	58	12	16	14	2	2	4	0.55
25	115	85	68	12	22	14	2	2	4	0.67
32	135	100	78	12	28	18	2	2	4	0.91
40	145	110	88	14	36	18	3	2	4	1.24
50	160	125	102	14	46	18	3	2	4	1.55
65	180	145	122	14	60	18	3	2	4	2.04
80	195	160	138	14	76	18	3	2	4	2.44
100	215	180	158	16	94	18	3	2	8	3.51
125	245	210	188	16	118	18	3	2	8	4.69
150	280	240	212	18	142	23	3	2	8	6.99
200	335	295	268	20	196	23	3	2	12	11.49
250	390	355	320	24	244	27	3	2	12	19.74
300	405	410	378	28	294	27	4	3	12	29.58
350	460	470	438	32	344	27	4	3	16	44.22
400	520	525	490	34	390	30	4	3	16	59.86
500	580	650	610	40	490	33	4	3	20	102.69
600	710	770	720	45	590	40	5	4	20	161.98
800	840	950	900	52	780	40	5	4	24	300.6
1000	1020	1170	1110	63	980	46	5	4	28	542.16
1200	1485	1390	1325	75	1180	52	5	4	32	922.18

(Korean Standards) KS 10k Flange Thickness Calculation For Pressure Vessel And Visit Our Gost 33259 Flange Mill In India.

KS B1503 10K-16K Flanges Schedule Chart

Standard Of Flanges	Class Of Flanges	Diameter Of Flanges	Bolt Circle Diameter Of Flanges	Number of Bolts Of Flanges	Bolt Size Of Flanges	Bolt Hole Diameter
AS4087 Flanges	PN14 Flanges	95	67	4	M12	14
AS 2129 Flange	Table C Flanges	95	67	4	13	14
	Table D Flanges	95	67	4	13	14
	Table E Flanges	95	67	4	13	14
	Table F Flanges	95	67	4	13	14
	Table H Flanges	114	83	4	16	17
	Table J Flanges	114	83	4	16	17
ANSI B16.5 Flanges	ANSI 150 Flanges	89	60	4	13	16
	ANSI 300 Flanges	95	67	4	13	16
	ANSI 600 Flanges	95	67	4	13	16
	ANSI 900 Flanges	121	83	4	19	22
	ANSI 1500 Flanges	121	83	4	19	22
ISO 7005 (DIN) Flange	PN6 Flanges	80	55	4	M10	11
	PN10 Flanges	95	65	4	M12	14
	PN16 Flanges	95	65	4	M12	14
	PN20 Flanges	90	60.5	4	M14	16
	PN25 Flanges	95	65	4	M12	14
	PN40 Flanges	95	65	4	M12	14

Flange Gost 12820 Pressure Rating Class

Gost 12820 Flange Pressure Pressure
Temperature (°C)	Class
Temperature (°C)	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 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

Gost 33259 Flange Thickness Calculation

Gost 33259 Flange Wall Thickness
NPS (Normal Pipe Sizes)	Outside Daimeter (O.D.)	Schedule 10	Schedule 20	Schedule 30	STD Wall	Schedule 40	Schedule 60	EXT Hvy	Schedule 80	Schedule 100	Schedule 120	Schedule 140	Schedule 160	XX Hvy
½	0.84	0.083	...	...	0.109	0.109	...	0.147	0.147	...	...	...	0.188	0.294
¾	1.05	0.083	...	...	0.113	0.113	...	0.154	0.154	...	...	...	0.219	0.308
1	1.315	0.109	...	...	0.133	0.133	...	0.179	0.179	...	...	...	0.25	0.358
1 ¼	1.66	0.109	...	...	0.14	0.14	...	0.191	0.191	...	...	...	0.25	0.382
1 ½	1.9	0.109	...	...	0.145	0.145	...	0.2	0.2	...	...	...	0.281	0.4
2	2.375	0.109	...	...	0.154	0.154	...	0.218	0.218	...	...	...	0.344	0.436
2 ½	2.875	0.12	...	...	0.203	0.203	...	0.276	0.276	...	...	...	0.375	0.552
3	3.5	0.12	...	...	0.216	0.216	...	0.3	0.3	...	...	...	0.438	0.6
3 ½	4	0.12	...	...	0.226	0.226	...	0.318	0.318	...	...	...	...	0.636
4	4.5	0.12	...	...	0.237	0.237	...	0.337	0.337	...	0.438	...	0.531	0.674
5	5.563	0.134	...	...	0.258	0.258	...	0.375	0.375	...	0.5	...	0.625	0.75
6	6.625	0.134	...	...	0.28	0.28	...	0.432	0.432	...	0.562	...	0.719	0.864
8	8.625	0.148	0.25	0.277	0.322	0.322	0.406	0.5	0.5	0.594	0.719	0.812	0.906	0.875
10	10.75	0.165	0.25	0.307	0.365	0.365	0.5	0.5	0.594	0.719	0.844	1	1.125	1
12	12.75	0.18	0.25	0.33	0.375	0.406	0.562	0.5	0.688	0.844	1	1.125	1.312	1
14	14	0.25	0.312	0.375	0.375	0.438	0.594	0.5	0.75	0.938	1.094	1.25	1.406	...
16	16	0.25	0.312	0.375	0.375	0.5	0.656	0.5	0.844	1.031	1.219	1.438	1.594	...
18	18	0.25	0.312	0.438	0.375	0.562	0.75	0.5	0.938	1.156	1.375	1.562	1.781	...
20	20	0.25	0.375	0.5	0.375	0.594	0.812	0.5	1.031	1.281	1.5	1.75	1.969	...
22	22	0.25	...	...	0.375	...	...	0.5	...	...	....	....	....	....
24	24	0.25	0.375	0.562	0.375	0.688	0.969	0.5	1.219	1.531	1.812	2.062	2.344	....
26	26	....	....	....	0.375	....	....	0.5	....	....	....	....	....	....
30	30	0.312	0.5	0.625	0.375	....	....	0.5	....	....	....	....	....	....
36	36	0.312	0.5	0.625	0.375	0.75	....	0.5	....	....	....	....	....	....
40	40	....	....	....	0.375	....	....	0.5	....	....	....	....	....	....
42	42	……..	……..	……..	0.375	……..	……..	0.5	……..	……..	……..	……..	……..	……..
48	48	……..	……..	……..	0.375	……..	……..	0.5	……..	……..	……..	……..	……..	……..

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Gost 12821 Weld Neck Flange Bolt Chart

	Class 150 Flanges				Class 300 Flanges				Class 600 Flanges
NPS	# Bolts And Studs	Diameter of Bolts And Studs	Stud Length		# Bolts And Studs	Diameter of Bolts And Studs	Stud Length		# Bolts And Studs	Diameter of Bolts And Studs	Stud Length
			1/16 RF	RTJ			1/16 RF	RTJ			1/4 RF	RTJ
1/2	4	0.50	2-1/4	–	4	0.50	2-1/2	3	4	0.50	3	3
3/4	4	0.50	2-1/2	–	4	0.63	3	3-1/2	4	0.63	3-1/2	3-1/2
1	4	0.50	2-1/2	3	4	0.63	3	3-1/2	4	0.63	3-1/2	3-1/2
1-1/4	4	0.50	2-3/4	3-1/4	4	0.63	3-1/4	3-3/4	4	0.63	3-3/4	3-3/4
1-1/2	4	0.50	2-3/4	3-1/4	4	0.75	3-1/2	4	4	0.75	4-1/4	4-1/4
2	4	0.63	3-1/4	3-3/4	8	0.63	3-1/2	4	8	0.63	4-1/4	4-1/4
2-1/2	4	0.63	3-1/2	4	8	0.75	4	4-1/2	8	0.75	4-3/4	4-3/4
3	4	0.63	3-1/2	4	8	0.75	4-1/4	4-3/4	8	0.75	5	5
3-1/2	8	0.63	3-1/2	4	8	0.75	4-1/4	5	8	0.88	5-1/2	5-1/2
4	8	0.63	3-1/2	4	8	0.75	4-1/2	5	8	0.88	5-3/4	5-3/4
5	8	0.75	3-3/4	4-1/4	8	0.75	4-3/4	5-1/4	8	1.00	6-1/2	6-1/2
6	8	0.75	4	4-1/2	12	0.75	4-3/4	5-1/2	12	1.00	6-3/4	6-3/4
8	8	0.75	4-1/4	4-3/4	12	0.88	5-1/2	6	12	1.13	7-1/2	7-3/4
10	12	0.88	4-1/2	5	16	1.00	6-1/4	6-3/4	16	1.25	8-1/2	8-1/2
12	12	0.88	4-3/4	5-1/4	16	1.13	6-3/4	7-1/4	20	1.25	8-3/4	8-3/4
14	12	1.00	5-1/4	5-3/4	20	1.13	7	7-1/2	20	1.38	9-1/4	9-1/4
16	16	1.00	5-1/4	5-3/4	20	1.25	7-1/2	8	20	1.50	10	10
18	16	1.13	5-3/4	6-1/4	24	1.25	7-3/4	8-1/4	20	1.63	10-3/4	10-3/4
20	20	1.13	6-1/4	6-3/4	24	1.25	8	8-3/4	24	1.63	11-1/4	11-1/2
24	20	1.25	6-3/4	7-1/4	24	1.50	9	10	24	1.88	13	13-1/4

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