GOST FLANGE SPECIFICATIONS (RUSSIAN FLANGE STANDARDS DATA CHARTS)

Specification/ Dimension of GOST flange (GB flange)

	GB9119，2—88						GB9119，2—88
in	NPS	10kg=1.0MPa					NPS	16kg=1.6MPa
		OD		Dia of bolts	Holes	Thickness		OD	distance of bolts	Dia of bolts	Holes	Thickness
3/8	DN10	50	60	14	4	14	DN10	90	60	14	4	14
1/2	DN15	59	65	14	4	14	DN15	95	65	14	4	14
3/4	DN20	105	75	14	4	16	DN20	105	75	14	4	16
1	DN25	115	85	14	4	16	DN25	115	85	14	4	16
11/4	DN32	140	100	18	4	18	DN32	140	100	18	4	18
11/2	DN40	150	110	18	4	18	DN40	150	110	18	4	18
2	DN50	165	125	18	4	20	DN50	165	125	18	4	20
21/2	DN65	185	145	18	4	20	DN65	185	145	18	4	20
3	DN80	200	160	18	8	20	DN80	200	160	18	8	20
31/2	DN100	220	180	18	8	22	DN100	220	180	18	8	22
4	DN125	250	210	18	8	22	DN125	250	210	18	8	22
5	DN150	285	240	22	8	24	DN150	285	240	22	8	24
6	DN200	340	295	22	8	24	DN200	340	295	22	8	26
8	DN250	395	350	22	12	26	DN250	405	355	26	12	29
10	DN300	445	400	22	12	28	DN300	460	410	26	12	32
12	DN350	505	460	22	16	30	DN350	520	470	26	16	35
14	DN400	565	515	26	16	32	DN400	580	525	30	16	38
16	DN450	615	565	26	20	35	DN450	640	585	30	20	42
18	DN500	670	620	26	20	38	DN500	715	650	33	20	46
20	DN600	780	725	26	20	42	DN600	840	770	36	20	52

 

GOST 12820-80 Flat Flange (Slip On)  

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GOST 12821-80 Welding Neck Flange

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