EN 1092-1-5 Blind flanges – free 3D CAD files, info & dimensions

A blind flange is a specific type of flange that are used to close the end of a pipe or vessel. It is typically made from a material that matches the pipe or vessel it is being used with, and it has bolt holes around the perimeter to allow it to be securely attached to the pipe or vessel. A blind flange is a solid disk-shaped flange with no center opening.

The EN 1092-1 is a European standard for flanges that specifies the dimensions, materials, and technical requirements for various types of flanges. A blind flange is one of the types defined by this standard and is coded as “type 5”.

Main function: seal off a section of the pipeline

Blind flanges provide a secure and reliable method for closing off a pipeline or creating a temporary seal, enabling various maintenance, testing, and safety procedures to be carried out effectively in a piping system.

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In this article

• EN 1092-1-5 DN200 PN16 Flange 3D 360° View
• Situations to use a blind flange
• In which industries are blind flanges used?
• Face types for blind flanges
• The three most commonly used materials for blind flanges
• Are blind flanges readily available?
• EN 1092-1 Type 5 – DIMENSIONS & FREE 3D CAD FILES
• Other EN1092-1 flange types
• Welding fittings for EN1092-1 flanges

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EN 1092-1-5 DN200 PN16 Flange 3D 360° View

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Situations to use a blind flange

• Maintenance and Repair: During maintenance or repair work on a section of a pipeline, a blind flange can be installed to isolate that section, allowing the rest of the system to continue operating without interruption.
• Pressure Testing: Blind flanges are commonly used during pressure testing of pipelines or equipment. By installing a blind flange at one end of the system, pressure can be applied to the opposite end, allowing for a thorough examination of the integrity and strength of the pipeline.
• System Expansion: In cases where future expansion of the pipeline is anticipated, a blind flange can be used as a temporary closure until the expansion takes place. This allows for easy access to the system when the time comes to connect the new piping.
• Blockage or Contamination Prevention: If there is a risk of foreign material entering the pipeline or if a section needs to be sealed off to prevent contamination, a blind flange can be employed to block the flow and ensure the integrity of the system.
• Safety Considerations: In certain situations, such as the presence of hazardous materials or when work is being carried out on adjacent sections of the pipeline, it may be necessary to isolate a portion of the system using blind flanges to maintain safety.

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In which industries are blind flanges used?

Blind flanges are used in a variety of industries where piping systems are used, particularly in applications where the end of a pipe or vessel needs to be closed off. Some of the industries where blind flanges are commonly used include:

• Oil and gas: Blind flanges are used to seal off the end of pipelines or tanks in the oil and gas industry, particularly during maintenance or when a section of the pipeline or tank is not in use.
• Chemical: Blind flanges are used in chemical processing plants to close off pipes or vessels that are not in use or require maintenance.
• Water and wastewater treatment: Blind flanges are used in water and wastewater treatment plants to seal off pipes or tanks during maintenance or when certain sections are not in use.
• Power generation: Blind flanges are used in power generation plants to seal off pipes or tanks during maintenance or when certain sections are not in use.
• Food and beverage: Blind flanges are used in the food and beverage industry to seal off pipes or vessels during cleaning or when certain sections are not in use.

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Face types for blind flanges

According to the EN 1092-1 standard, blind flanges can have various types of face finishes, which are designated by a letter code. The face finish of a blind flange is important as it affects the type of gasket used, the method of installation, and the level of sealing achieved. The following are the possible face types for blind flanges according to the EN 1092-1 standard:

• Type A: Flat face without any surface finish.
• Type B: Raised face with a concentric groove.
• Type C: Raised face with a ring groove.
• Type D: Raised face with male and female facings.
• Type E: Raised face with a tongue and groove joint.
• Type F: Raised face with a recessed groove.
• Type G: Ring joint face for ring-type joint gaskets.
• Type H: Compact face, suitable for small diameter and high-pressure applications.
• Type J: Large male and female facings for very high-pressure applications.

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The three most commonly used materials for blind flanges

1. Carbon Steel: Carbon steel is a widely used material for flanges due to its affordability, good mechanical properties, and versatility. Flanges made of carbon steel are suitable for a wide range of applications and pressure ratings.
2. Stainless Steel: Stainless steel is another popular material for EN1092-1 flanges. It offers excellent corrosion resistance, making it suitable for applications where the flange will come into contact with corrosive substances or environments. Stainless steel flanges are commonly used in industries such as chemical processing, food processing, and offshore oil and gas.
3. Alloy Steel: Alloy steel flanges are chosen when additional strength, higher temperature resistance, or specific mechanical properties are required. These flanges are often used in high-pressure and high-temperature applications, such as power generation plants, petrochemical refineries, and oil and gas pipelines.

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Are blind flanges readily available?

Yes! blind flanges are generally readily available. They are among the most common and widely used types of flanges, and they are extensively utilized in various industrial sectors worldwide. As a result, they are typically easily accessible from pipeline material suppliers, flange manufacturers, and distributors.

You can find blind flanges at specialized industrial component suppliers, pipeline suppliers, flange manufacturers, and general construction material suppliers. Additionally, there are online platforms where you can find and order a wide range of flanges, including blind flanges.

When obtaining blind flanges, it is important to consider the requirements of your specific project, such as the desired pressure class, dimensions, and material. This will help you select the appropriate flanges that meet the specific needs of your application.

It is always advisable to consult reliable suppliers who deliver high-quality flanges and are knowledgeable about the relevant standards and specifications. This way, you can ensure the quality and suitability of the blind flanges for your project.

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Other EN1092-1 flange types

• EN1092-1-1 – Plate flanges for welding
• EN1092-1-2 – Loose plate flanges
• EN1092-1-4 – Slip-on flanges
• EN1092-1-11 – Welding neck flanges
• EN1092-1-12 – Hubbed slip-on welding flanges

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Welding fittings for EN1092-1 flanges

• EN10253-4 Welding bends 90°
• EN10253-4 Welding tees
• EN10253-4 Reducing tees
• EN10253-4 Concentric reducers
• EN10253-4 Eccentric reducers

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EN 1092-1 Type 5 Dimensions & free CAD files

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Blind flanges – PN25 dimensions & free CAD files

DN	Download 3D CAD file	D	C4	K	L x No
10	https://a360.co/3ljLi7X	The same dimensions as PN40
15	https://a360.co/3FoRy6w	The same dimensions as PN40
20	https://a360.co/3FjCk2B	The same dimensions as PN40
25	https://a360.co/3lgx2wL	The same dimensions as PN40
32	https://a360.co/3oEnf5G	The same dimensions as PN40
40	https://a360.co/3oGbZ98	The same dimensions as PN40
50	https://a360.co/3iBgiOP	The same dimensions as PN40
65	https://a360.co/3aeMumD	The same dimensions as PN40
80	https://a360.co/3aiRGpL	The same dimensions as PN40
100	https://a360.co/3iBNl5G	The same dimensions as PN40
125	https://a360.co/3mCtuoa	The same dimensions as PN40
150	https://a360.co/3BlAz2u	The same dimensions as PN40
200	https://a360.co/3Fi3mXY	360	30	310	26 x 12
250	https://a360.co/3DmqVxg	425	32	370	30 x 12
300	https://a360.co/3DmURZM	485	34	430	30 x 16
350	https://a360.co/3Bmm3r4	555	38	490	33 x 16
400	https://a360.co/3Ake3pt	620	40	550	36 x 16
450	https://a360.co/3mvvWN9	670	46	600	36 x 20
500	https://a360.co/3FrA9Kc	730	48	660	36 x 20
600	https://a360.co/3Fr8GZi	845	58	770	39 x 20

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Blind flanges – PN40 dimensions & free CAD files

DN	Download 3D CAD file	D	C4	K	L x No
10	https://a360.co/3ljLi7X	90	16	60	14 x 4
15	https://a360.co/3FoRy6w	95	16	65	14 x 4
20	https://a360.co/3FjCk2B	105	18	75	14 x 4
25	https://a360.co/3lgx2wL	115	18	85	14 x 4
32	https://a360.co/3oEnf5G	140	18	100	18 x 4
40	https://a360.co/3oGbZ98	150	18	110	18 x 4
50	https://a360.co/3iBgiOP	165	20	125	18 x 4
65	https://a360.co/3aeMumD	185	22	145	18 x 8
80	https://a360.co/3aiRGpL	200	24	160	18 x 8
100	https://a360.co/3iBNl5G	235	24	190	22 x 8
125	https://a360.co/3mCtuoa	270	26	220	26 x 8
150	https://a360.co/3BlAz2u	300	28	250	26 x 8
200	https://a360.co/3agQjIc	375	36	320	30 x 12
250	https://a360.co/3adGZVt	450	38	385	33 x 12
300	https://a360.co/3aeMP8T	515	42	450	33 x 16
350	https://a360.co/3DgcASM	580	46	510	36 x 16
400	https://a360.co/3ahx6Gm	660	50	585	39 x 16
450	https://a360.co/2YvHxU8	685	57	610	39 x 20
500	https://a360.co/3AgUkGZ	755	57	670	42 x 20
600	https://a360.co/3Do5qfr	890	72	795	48 x 20

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Blind flanges – PN63 dimensions & free CAD files

DN	Download 3D CAD file	D	C4	K	L x No
10	https://a360.co/3lfnLFc	The same dimensions as PN100
15	https://a360.co/3akfYiU	The same dimensions as PN100
20	https://a360.co/2YqiKAC	The same dimensions as PN100
25	https://a360.co/3AdREtO	The same dimensions as PN100
32	https://a360.co/3lkeLi2	The same dimensions as PN100
40	https://a360.co/3lkMYyc	The same dimensions as PN100
50	https://a360.co/3uR4CMN	180	26	135	22 x 4
65	https://a360.co/3afjBa1	205	26	160	22 x 8
80	https://a360.co/3mveJ6k	215	26	170	22 x 8
100	https://a360.co/2YxUJb9	250	30	200	26 x 8
125	https://a360.co/3aggxui	295	34	240	30 x 8
150	https://a360.co/3ad08GW	345	36	280	33 x 8
200	https://a360.co/3Ftb7dY	415	42	345	36 x 12
250	https://a360.co/3Bm6YWH	470	46	400	36 x 12
300	https://a360.co/3FsCOmO	530	52	460	36 x 16
350	https://a360.co/3AlAjiq	600	56	525	39 x 16

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Blind flanges – PN100 dimensions & free CAD files

DN	Download 3D CAD file	D	C4	K	L x No
10	https://a360.co/3lfnLFc	100	20	70	14 x 4
15	https://a360.co/3akfYiU	105	20	75	14 x 4
20	https://a360.co/2YqiKAC	130	22	90	18 x 4
25	https://a360.co/3AdREtO	140	24	100	18 x 4
32	https://a360.co/3lkeLi2	155	24	110	22 x 4
40	https://a360.co/3lkMYyc	170	26	125	22 x 4
50	https://a360.co/3oCLXmT	195	28	145	26 x 4
65	https://a360.co/3AeUiPP	220	30	170	26 x 8
80	https://a360.co/3lkeWKe	230	32	180	26 x 8
100	https://a360.co/3Amn5Cd	265	36	210	30 x 8
125	https://a360.co/3iHg1Kp	315	40	250	33 x 8
150	https://a360.co/3AdRSkE	355	44	290	33 x 12
200	https://a360.co/2WNRlrR	430	52	360	36 x 12
250	https://a360.co/3Fm3Uw2	505	60	430	39 x 12
300	https://a360.co/3FoTgoj	585	68	500	42 x 16
350	https://a360.co/3lkfaB4	655	74	560	48 x 16