When it comes to sealing and isolating industrial piping systems, precision, durability, and compliance with international standards are non-negotiable. The EN1092-1 Blind Flanges Type 05 stands out as a reliable solution, designed to meet the rigorous requirements of the European EN1092-1 standard for steel flanges. Whether you’re working in oil & gas, water treatment, chemical processing, or manufacturing, this blind flange delivers consistent performance, easy installation, and long-term reliability—making it the top choice for global engineers and procurement teams.

What is EN1092-1 Blind Flanges Type 05?

EN1092-1 standard defines the specifications for steel flanges used in piping systems, valves, and fittings across industries worldwide. Within this standard, Type 05 specifically refers to blind flanges—a specialized, hole-free disc-shaped flange designed to seal the end of a pipe, vessel, or valve.

Unlike other flanges used for pipe-to-pipe connection, EN1092-1 Type 05 blind flanges have no central bore. They are secured to the end of a piping system using bolts, creating a tight, leak-proof seal that prevents media leakage and protects the system from external contaminants. This design also simplifies future maintenance, expansion, and pressure testing of piping systems.

Specifications of EN1092-1 Blind Flanges

Compliance with EN1092-1 ensures uniform dimensions, material quality, and performance—critical for seamless compatibility with other EN1092-1 compliant flanges. Below are the core specifications that set our Type 05 blind flanges apart:

EN1092-1 Blind Flanges Pressure Ratings (PN)

Available in a full range of pressure ratings to suit diverse industrial applications, including PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, and PN100.

This versatility allows the flange to be used in low-pressure applications (e.g., municipal water systems) and high-pressure environments (e.g., oil pipelines and chemical reactors).

 Size Range (DN)

Covering nominal diameters from DN10 to DN4000 (custom sizes available upon request), our EN1092-1 blind flanges fit virtually any piping system—from small-scale workshop lines to large industrial pipelines.

The dimensions (flange outer diameter, bolt circle diameter, bolt hole size, and flange thickness) are strictly manufactured to EN1092-1 standards, ensuring perfect interchangeability with compatible flanges.

EN1092-1 Flanges Sealing Face Types

To accommodate different media, pressure, and temperature requirements, we offer multiple sealing face options—matching the standard’s most commonly used configurations:

• FF (Flat Face, Standard Code A): Ideal for low-pressure applications (PN≤16), paired with soft gaskets, and commonly used with cast iron or carbon steel flanges.
• RF (Raised Face, Standard Code B1/B2): The most versatile option, suitable for medium-low pressure (PN10–PN100) and compatible with most gasket types, making it the go-to choice for general industrial use.
• M/F (Male & Female) & T/G (Tongue & Groove): Designed for high-pressure systems, these paired sealing faces prevent gasket extrusion, ensuring reliable sealing for flammable, explosive, or toxic media.
• RJ (Ring Joint, Standard Code H): For extreme high-temperature and high-pressure conditions (e.g., PN63/100), using metal ring gaskets for superior leak resistance in harsh environments.

Material Options for EN1092-1 Blind Flanges

We use high-quality materials to ensure durability and corrosion resistance, tailored to your application’s needs:

• Carbon Steel: A105, ST37, S235JR, Q235, 16Mn (cost-effective for general industrial use).
• Stainless Steel: 304, 316, 321, 904L (resistant to corrosion, ideal for chemical, food, and marine applications).
• Alloy Steel: P91, P245GH (for high-temperature, high-pressure applications like power plants and oil refineries).

All materials undergo strict quality testing to meet EN1092-1 requirements, including chemical composition analysis and mechanical performance testing.

Surface Treatment

To enhance corrosion resistance and extend service life, we offer various surface treatments:

• Standard: Anti-rust black paint, transparent anti-rust oil, anti-rust varnish.
• Custom: Hot-dip galvanizing, sandblasting (for harsh environments like marine or chemical plants).

Why Choose EN1092-1 Type 05 Blind Flanges?

For global buyers and engineers, choosing EN1092-1 compliant Type 05 blind flanges means prioritizing safety, efficiency, and cost-effectiveness. Here’s what makes our product the best choice:

✅ Strict EN1092-1 Compliance

Every flange is manufactured and inspected to meet EN1092-1 standards, ensuring compatibility with European and global piping systems. This eliminates the risk of mismatched dimensions or subpar performance, saving you time and costs on replacements and repairs.

✅ Superior Sealing & Durability

Precision-machined sealing faces and high-quality materials ensure a leak-proof seal even in extreme conditions (high temperature, high pressure, corrosive media). The robust disc design reduces stress concentration, making the flange resistant to fatigue and wear—extending service life significantly.

✅ Easy Installation & Maintenance

The simple, lightweight design (compared to weld-neck flanges) allows for quick bolt-on installation—no complex welding required. When maintenance, inspection, or system expansion is needed, the blind flange can be easily removed, minimizing downtime and labor costs.

✅ Versatile Applications

EN1092-1 Type 05 blind flanges are used across virtually every industry, including:

• Oil & Gas: Pipeline isolation, pressure testing, and equipment sealing.
• Chemical Processing: Sealing corrosive media pipelines (paired with stainless steel or alloy materials).
• Water Treatment: Low-pressure piping system sealing for municipal or industrial water plants.
• Power Generation: High-temperature/high-pressure system isolation in thermal or nuclear power plants.
• Manufacturing: Workshop air compression pipelines, hydraulic systems, and equipment ports.

✅ Customization & Competitive Pricing

We offer custom sizes, materials, sealing faces, and surface treatments to meet your unique project needs. As manufacturer, we cut out middlemen to provide competitive pricing without compromising quality—ideal for bulk orders and long-term partnerships.

Conclusion

EN1092-1 Type 05 blind flanges are reliable end caps for piping systems, offering excellent sealing performance, high structural strength, and wide compatibility with European standard pipelines.

With various pressure ratings, sealing faces, and material options available, these flanges meet the demands of oil and gas, chemical, water treatment, power generation, and general industrial applications.

Our EN1092-1 flanges are manufactured in strict accordance with European standards, ensuring stable quality, precise dimensions, and long service life for your critical pipeline projects.

Contact Us

As a professional engineering manufacturer, Zizi Engineering Co Ltd offers integrated one-stop solutions, covering manufacturing, customization, and sales. 

Our full-process services—from cutting, forming, grinding to welding and assembly—help you shorten supply chains, cut costs, and boost project efficiency.

We welcome inquiries from project developers, contractors and enterprise clients to whom we will offer professional technical support and efficient manufacturing services. 

Look forward to being your reliable partner.