GOST 33259-2015 type 01 Steel flat welded flange

GOST 33259-2015 type 01 flange manufacturer

GOST 33259-2015 is a Russian Standard,Flanges for valves, fittings and pipelines for pressure to PN 250. Design, dimensions and general technical requirements

This standard applies to connecting flanges of valves, fittings and pipelines as well as those of machinery, equipment, instruments, plants and vessels for nominal pressure up to PN 250 and establishes the design and dimensions of steel and cast iron flanges, defines flange types, flange facing types, and technical requirements for manufacture, marking, testing and inspection. The standard provides guidelines for selection of materials for flanges and fasteners for flange connections as well as for selection of flange facing type depending on the hazard level and fluid parameters. Flanges for other facilities, parameters and conditions are subject to GOST 1536, GOST 4433, GOST 9399, GOST 25660, GOST 28759.1 through GOST 28759.5, GOST R 52630.

GOST 33259-2015 Type 01 Falt Weld flanges (plate flanges per GOST 12820-80) in sizes DN 15–DN 2000 and pressure classes PN 6, 10, 16, 25, 40. Available in carbon steel (CT-20) and stainless steels (SS304/L ,SS321,SS316/L) for reliable pipeline connections.

Specifications

Feature	Details
Design Standard	GOST 33259-2015 Type 01 Flat Weld flanges
Pressure Classes	PN 6, PN 10, PN 16, PN 25, PN 40
Nominal Sizes	DN 15 – DN 2000 (½″ – 80″)

Flange Materials as per Gost 33259

Carbon Steel CT-20 (equivalent to ASTM A105),09T2C Low temperature
Stainless Steel 12X18H10T; S10X17H13M2T;SS304/L,SS316/L,904L
Alloy steel ; 15X5M

GOST 33259 type 01-B PN6 steel flat flange Dimension

DN	PN	de, mm	b, mm	D, mm	D1, mm	D2, mm	n qty	d	h, mm	c1	Weight, kgs
15	6	19	12	80	55	40	4	11	2	2	0.33
20	6	26	14	90	65	50	4	11	2	2	0.53
25	6	33	14	100	75	60	4	11	2	3	0.64
32	6	39	15	120	90	70	4	14	2	3	1.02
40	6	46	16	130	100	80	4	14	3	3	1.21
50	6	59	16	140	110	90	4	14	3	3	1.33
65	6	78	16	160	130	110	4	14	3	4	1.63
80	6	91	18	185	150	128	4	18	3	4	2.44
100	6	110	18	205	170	148	4	18	3	4	2.85
125	6	135	20	235	200	178	8	18	3	4	3.88
150	6	161	20	260	225	202	8	18	3	4	4.35
200	6	222	22	315	280	258	8	18	3	4	5.9
250	6	273	23	370	335	312	12	18	3	6	7.7
300	6	325	24	435	395	365	12	22	4	7	10.3
350	6	377	26	485	445	415	12	22	4	7	12.9
400	6	426	28	535	495	465	16	22	4	7	15.2
450	6	480	28	590	550	520	16	22	4	7	17.3
500	6	530	29	640	600	570	16	22	4	7	19.7
600	6	630	30	755	705	670	20	26	5	7	26.2
700	6	720	32	860	810	775	24	26	5	9	36.7
800	6	820	32	975	920	880	24	30	5	9	46.1
900	6	920	34	1075	1020	980	24	30	5	9	55.1
1000	6	1020	36	1175	1120	1080	28	30	5	10	64.4
1200	6	1220	39	1400	1340	1295	32	33	5	10	99
1400	6	1420	48	1620	1560	1510	36	33	5	10	161.4

GOST 33259 type 01-B PN10 steel flat flange Dimension

Nomencatlure	Dimensions, mm								Weight, Kg
Nomencatlure	D	D1	D2	d1	b	h	n, Number of holes	d	Weight, Kg
Pnom = 1,0 MPa (10 kgf/cm2)
1-10-10	90	60	42	15	10	2	4	14	0.46
1-15-10	95	65	47	19	10	2	4	14	0.51
1-20-10	105	75	58	26	12	2	4	14	0.74
1-25-10	115	85	68	33	12	2	4	14	0.89
1-32-10	135	100	78	39	14	2	4	18	1.4
1-40-10	145	110	88	46	15	3	4	18	1.71
1-50-10	160	125	102	59	15	3	4	18	2.06
1-65-10	180	145	122	78	17	3	4	18	2.8
1-80-10	195	160	133	91	17	3	4	18	3.19
1-100-10	215	180	158	110	19	3	8	18	3.96
1-125-10	245	210	184	135	21	3	8	18	5.4
1-150-10	280	240	212	161	21	3	8	22	6.62
1-175-10	310	270	242	196	21	3	8	22	7.32
1-200-10	335	295	268	222	21	3	8	22	8.05
1-225-10	365	325	295	245	21	3	8	22	9.3
1-250-10	390	350	320	273	23	3	12	22	10.65
1-300-10	440	400	370	325	24	4	12	22	12.9
1-350-10	500	460	430	377	24	4	16	22	15.85
1-400-10	565	515	482	426	26	4	16	26	21.56
1-450-10	615	565	532	480	26	4	20	26	22.76
1-500-10	670	620	585	530	28	4	20	26	27.7
1-600-10	780	725	685	630	31	5	20	30	39.4
1-700-10	895	840	800	720	34	5	24	30	59.46
1-800-10	1010	950	905	820	37	5	24	33	79.16
1-900-10	1110	1050	1005	920	40	5	28	33	94.13
1-1000-10	1220	1160	1110	1020	43	5	28	33	118.43
1-1200-10	1455	1380	1330	1222	51	5	32	39	197.44

GOST 33259 type 01-B PN16 steel flat flange Dimension

Nomencatlure	Dimensions, mm								Weight, Kg
Nomencatlure	D	D1	D2	d1	b	h	n, Number of holes	d	Weight, Kg
Pnom = 1,6 MPa (16 kgf/cm2)
1-10-16	90	60	42	15	12	2	4	14	0.54
1-15-16	95	65	47	19	12	2	4	14	0.61
1-20-16	105	75	58	26	14	2	4	14	0.86
1-25-16	115	85	68	33	16	2	4	14	1.17
1-32-16	135	100	78	39	16	2	4	18	1.58
1-40-16	145	110	88	46	17	3	4	18	1.96
1-50-16	160	125	102	59	19	3	4	18	2.58
1-65-16	180	145	122	78	21	3	4	18	3.42
1-80-16	195	160	133	91	21	3	4	18	3.71
1-100-16	215	180	158	110	23	3	8	18	4.73
1-125-16	245	210	184	135	25	3	8	18	6.38
1-150-16	280	240	212	161	25	3	8	22	7.81
1-175-16	310	270	242	196	25	3	8	22	8.64
1-200-16	335	395	268	222	27	3	12	22	10.1
1-225-16	365	325	295	245	27	3	12	22	11.7
1-250-16	405	355	320	273	28	3	12	26	14.49
1-300-16	460	410	370	325	28	4	12	26	17.78
1-350-16	520	470	430	377	30	4	16	26	22.88
1-400-16	580	525	482	426	34	4	16	30	31
1-450-16	640	585	532	480	38	4	20	30	39.64
1-500-16	710	650	585	530	44	4	20	33	57.01
1-600-16	840	770	685	630	45	5	20	39	80.03
1-700-16	910	840	800	720	47	5	24	39	84.21
1-800-16	1020	950	905	820	49	5	24	39	104.41
1-900-16	1120	1050	1005	920	54	5	28	39	128.6
1-1000-16	1255	1170	1110	1020	58	5	28	45	179.37
1-1200-16	1485	1390	1330	1220	71	5	32	52	297.78

Typical Applications

General Piping: Non-critical process lines where hubless flanges suffice
Low-Pressure Systems: Ideal for PN 6–16 water, steam, and air services
Equipment Connections: Flat-face mating with valves, pumps, and tanks