Product Introduction

EN Blind Flange (EN 1092-1 Type 05) is a forged blind flange designed and manufactured in accordance with European standard EN 1092-1, used for closing pipe ends or equipment connections. With a pressure rating of PN6, it is suitable for low-pressure working conditions with a design pressure not exceeding 6 bar. Available in sizes ranging from DN10 to DN4000, it is integrated into piping systems via butt-welding or bolted connections. Produced by precision forging, the flange features a dense microstructure and stable mechanical properties.

Technical Characteristics

1. Applicable Standards

Product design, dimensional tolerances and technical specifications strictly comply with the EN 1092-1 European flange standard, ensuring interchangeability with internationally common pipe fittings and valves.

2. Material Grades

The following material categories are available according to working conditions:

Carbon Steel: P250GH, P245GH, P280GH, P355NH

Alloy Steel: 13CrMo4-5, 11CrMo9-10, X10CrMoVNb9-1

Stainless Steel: X2CrNi18-9, X6CrNiTi18-1, X2CrNiMo17-12-2

3. Key Dimensions

EN Blind Flange includes the following geometric parameters specified in EN 1092-1 (Unit: mm):

product-1586-819

EN 1092-1 PN6 Flanges
DN	Mating dimensions					Diameter of Neck Outside	Bore Diameter		Flange thickness			Chamfer	Collar thickness				Diameter of Shoulders	Length								Neck diameters			CornerRadius	Wall thickness
	Diameter Outside	Diameter of Bolt Circle	BoltHole	Bolting		Diameter of Neck Outside	Bore Diameter		Flange thickness			Chamfer	Collar thickness				Diameter of Shoulders	Length								Neck diameters			CornerRadius	Wall thickness
	D	K	L	No	Size	A	B1	B2	C1	C2 C3	C4	E	F				G max	H1	H2		H3		H4		H5	N1	N2	N3	R1	S
	Flange type
	01, 02, 05, 11, 12, 13, 21					11 21* 35-37	01 12 32	02	01 02	11 12 13 21	05	02	32	35	36	37	05	12 13	11	11		35		36	37	11	12 13	21	11 12 13 21	11 35 36 37
10	75	50	11	4	M10	17.2	18.0	21	12	12	12	3	10	5	2.0	2.5	-	20	28	6		28		35	7	26	25	20	4	See "Wall thickness and end preparation"
15	80	55	11	4	M10	21.3	22.0	25	12	12	12	3	10	5	2.0	2.5	-	20	30	6		30		38	7	30	30	26	4
20	90	65	11	4	M10	26.9	27.5	31	14	14	14	4	10	6	2.5	3.0	-	24	32	6		32		40	8	38	40	34	4
25	100	75	11	4	M10	33.7	34.5	38	14	14	14	4	10	7	2.5	3.0	-	24	35	6		35		40	10	42	50	44	4
32	120	90	14	4	M12	42.4	43.5	46	16	14	14	5	10	8	3.0	3.0	-	26	35	6		35		42	12	55	60	54	6
40	130	100	14	4	M12	48.3	49.5	53	16	14	14	5	10	8	3.0	3.0	-	26	38	7		38		45	15	62	70	64	6
50	140	110	14	4	M12	60.3	61.5	65	16	14	14	5	12	8	3.0	3.0	-	28	38	8		38		45	20	74	80	74	6
65	160	130	14	4	M12	76.1	77.5	81	16	14	14	6	12	8	3.0	3.0	55	32	38	9		38		45	20	88	100	94	6
80	190	150	18	4	M16	88.9	90.5	94	18	16	16	6	12	10	3.0	4.0	70	34	42	10		42		50	25	102	110	110	8
100	210	170	18	4	M16	114.3	116	120	18	16	16	6	14	10	4.0	4.0	90	40	45	10		45		52	25	130	130	130	8
125	240	200	18	8	M16	139.7	141.5	145	20	18	18	6	14	10	4.0	4.0	115	44	48	10		48		55	25	155	160	160	8
150	265	225	18	8	M16	168.3	170.5	174	20	18	18	6	14	10	5.0	4.0	140	44	48	12		48		55	25	184	185	182	10
200	320	280	18	8	M16	219.1	221.5	226	22	20	20	6	16	11	5.0	5.0	190	44	55	15		55		62	30	236	240	238	10
250	375	335	18	12	M16	273.0	276.5	281	24	22	22	8	18	12	8.0	-	235	44	60	15		60		68	-	290	295	284	12
300	440	395	22	12	M20	323.9	327.5	333	24	22	22	8	18	12	8.0	-	285	44	62	15		62		68	-	342	355	342	12
350	490	445	22	12	M20	355.6	359.5	365	26	22	22	8	18	13	8.0	-	330	-	62	15		62		68	-	385	-	392	12
400	540	495	22	16	M20	406.4	411	416	28	22	22	8	20	14	8.0	-	380	-	65	15		65		72	-	438	-	442	12
450	595	550	22	16	M20	457.0	462	467	30	22	24	8	20	15	8.0	-	425	-	65	15		72		72	-	492	-	494	12
500	645	600	22	20	M20	508.0	513.5	519	30	24	24	8	22	16	8.0	-	475	-	68	15		75		75	-	538	-	544	12
600	755	705	26	20	M24	610.0	616.5	622	32	30	30	8	22	16	-	-	575	-	70	16		70		-	-	640	-	642	12
700	860	810	26	24	M24	711.0	**	721	40	30	40	4	-	16	-	-	670	-	76	16		70		-	-	740	-	746	12
800	975	920	30	24	M27	813.0		824	44	30	44	4	-	16	-	-	770	-	76	16		70		-	-	842	-	850	12
900	1075	1020	30	24	M27	914.0		926	48	34	48	4	-	16	-		860	-	78	16		70		-	-	942	-	950	12
1000	1175	1120	30	28	M27	1016.0		1028	52	38	52	4	-	18	-	-	960	-	82	16		70		-	-	1045	-	1050	16
1200	1405	1340	33	32	M30	1219.0		1234	60	42	60	5	-	20	-	-	1160	-	104	20		90		-	-	1248	-	1264	16
1400	1630	1560	36	36	M33	1422.0		-	42	56	68	-	-	-	-	-	1346	-	114	20		-		-	-	1452	-	1480	16
1600	1830	1760	36	40	M33	1626.0		-	80	63	76	-	-	-	-	-	1546	-	119	20		-		-	-	1655	-	1680	16
1800	2045	1970	39	44	M36	1829.0		-	88	69	84	-	-	-	-	-	1746	-	133	20		-		-	-	1855	-	1878	16
2000	2265	2180	42	48	M39	2032.0		-	96	74	92	-	-	-	-	-	1950	-	146	25		-		-	-	2058	-	2082	16
2200	2475	2390	42	52	M39	2035.0	-	-	-	81	-	-	-	-	-	-	-	-	154	25		-		-	-	2260	-	-	18
2400	2685	2600	42	56	M39	2438.0	-	-	-	87	-	-	-	-	-	-	-	-	168	25		-		-	-	2462	-	-	18
2600	2905	2710	48	60	M45	2620.0	-	-	-	91	-	-	-	-	-	-	-	-	175	25		-		-	-	2665	-	-	18
2800	3115	3020	48	64	M45	2820.0	-	-	-	101	-	-	-	-	-	-	-	-	188	30		-		-	-	2865	-	-	18
3000	3315	3220	48	68	M45	3020.0	-	-	-	102	-	-	-	-	-	-	-	-	192	30		-		-	-	3068	-	-	18
3200	3525	3430	48	72	M45	3220.0	-	-	-	106	-	-	-	-	-	-	-	-	202	30		-		-	-	3272	-	-	20
3400	3735	3640	48	76	M45	3420.0	-	-	-	110	-	-	-	-	-	-	-	-	214	35		-		-	-	3475	-	-	20
3600	3970	3860	56	80	M52	3620.0	-	-	-	124	-	-	-	-	-	-	-	-	229	35		-		-	-	3678	-	-	20

Surface Treatment

The following surface treatments are provided based on service environments:

Anti-rust oil coating
Hot-dip galvanizing
Sandblasting
Pickling

Packaging & Supply

Products are packed in wooden cases or pallets, with a monthly supply capacity of 2000 tons to meet large-volume procurement demands of construction projects.

Applications

Applicable Industries: Petroleum, chemical, natural gas, electric power, shipbuilding, offshore engineering, municipal engineering (water supply, drainage, heating, gas), sewage treatment, construction, fire protection systems, machinery and equipment manufacturing.
Applicable Equipment: Piping systems, valves, pump stations, compressors, heat exchangers, boilers, steam turbines, generators, reactors, storage tanks, etc.

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