Flanges and collars

High-quality aluminum flanges for vehicle construction, apparatus construction, pipeline construction and boiler construction
Welcome to Blecha, your reliable supplier of aluminum flanges in Neunkirchen, Lower Austria! At www.blecha.at we offer high-quality products for customers worldwide, especially in Europe, Africa, Australia and America. Our aluminum flanges have been specially developed for use in various industrial sectors and offer numerous advantages.
Flanges and caps play an important role in various industries, including vehicle construction, apparatus construction, pipeline construction and boiler construction. Aluminum flanges are ideal for use in these industries due to their versatile properties. They offer high corrosion resistance, are light but robust and are characterized by excellent thermal conductivity. These properties make them an excellent choice for transporting and storing liquids and gases in demanding conditions.
Our cast aluminum lap joint flanges according to the EN1092-1 and DIN 2642 standards are characterized by their first-class quality and precision. For applications that require a closed connection, we offer cast aluminum blind flanges. They comply with the EN1092-1 and DIN 2527 standards, which guarantees their reliability and their compatibility with other components.
Our welding flanges are made from the high quality alloy EN AW-5083. These flanges offer excellent weldability and are manufactured to EN1092-1 and DIN 2576 standards.
Our tank-vehicle flanges have been specially developed for use in tank trucks. They are made of the high-quality EN AW-5754 alloy and comply with the DIN 28460 standard. The blind tanker vehicle flanges are made of the robust EN AW-5754 alloy comply with the DIN 28459 standard and offer a reliable and secure connection for the transport of liquids.
The unturned welding flanges and collar are made of high-quality EN AW-5754 alloy and comply with the DIN 2642 standard. These flanges provide a stable connection and allow for easy installation.
Our aluminum flanges and aluminum caps are available in various sizes and shapes to meet our customers' diverse needs. Whether transporting chemicals, fuels or other liquids, our bottles and crimps offer a safe and reliable solution.
You will also find a large selection of round tubes in the alloys EN AW-6060, EN AW-6082, EN AW-5754 and EN AW-5083. These round tubes are ideal for various applications in tanker construction, apparatus construction, pipeline construction and boiler construction and offer outstanding strength and durability.
The use of aluminum offers a number of advantages. Aluminum is a lightweight material that reduces the overall mass of products, thereby contributing to improved energy efficiency. This is particularly important in vehicle construction, where every kilogram saved translates into a reduction in fuel consumption. In addition, aluminum is 100% recyclable, contributing to a sustainable solution and reducing the environmental impact.
As a company with many years of experience in aluminum processing, we are proud to offer our customers high-quality products. Our aluminum flanges and caps are manufactured to strict quality standards and offer high reliability and durability. We work closely with our customers to understand their specific requirements and provide customized solutions.

Regardless of whether you work in vehicle construction, apparatus construction, pipeline construction or boiler construction - at Blecha you will find the right aluminum flanges for your applications. Visit our website at www.blecha.at to get to know our extensive range and contact us for further information or individual inquiries. We look forward to providing you with quality products and superior service.

Flanges

Lap joint flanges (EN1092-1, DIN 2642, G-AlSi12) - DN D1 d2 (metr.) d2 (ISO) D3 S 20 mm 105 mm 28 mm 4 x 14 mm 14 mm 40 mm 150 mm 54 mm 4 x 18 mm 16 mm 50 mm 165 mm 65 mm 4 x 18 mm 18 mm 65 mm 185 mm 73 mm 4 x 18 mm 18 mm 65 mm 185 mm 81 mm 4 x 18 mm 18 mm 80 mm 200 mm 90 mm 8 x 18 mm 20 mm 80 mm 200 mm 94 mm 8 x 18 mm 20 mm 100 mm 220 mm 111 mm 8 x 18 mm 18 mm 100 mm 220 mm 119 mm 8 x 18 mm 18 mm 125 mm 250 mm 136 mm 8 x 18 mm 22 mm 125 mm 250 mm 144 mm 8 x 18 mm 18 mm 150 mm 285 mm 161 mm 8 x 22 mm 18 mm 150 mm 285 mm 173 mm 8 x 22 mm 22 mm 200 mm 340 mm 212 mm 8 x 22 mm 29 mm 200 mm 340 mm 225 mm 8 x 22 mm 29 mm 250 mm 395 mm 264 mm 12 x 22 mm 26 mm 250 mm 395 mm 279 mm 12 x 22 mm 26 mm 300 mm 445 mm 315 mm 12 x 22 mm 26 mm 300 mm 445 mm 329 mm 12 x 22 mm 26 mm 350 mm 505 mm 365 mm 22 x 16 mm 26 mm Lap joint flanges (EN1092-1, DIN 2642, G-AlSi12) - DN D1 d2 (metr.) d2 (ISO) D3 S 20 mm 105 mm 28 mm 4 x 14 mm 14 mm 40 mm 150 mm 54 mm 4 x 18 mm 16 mm 50 mm 165 mm 65 mm 4 x 18 mm 18 mm 65 mm 185 mm 73 mm 4 x 18 mm 18 mm 65 mm 185 mm 81 mm 4 x 18 mm 18 mm 80 mm 200 mm 90 mm 8 x 18 mm 20 mm 80 mm 200 mm 94 mm 8 x 18 mm 20 mm 100 mm 220 mm 111 mm 8 x 18 mm 18 mm 100 mm 220 mm 119 mm 8 x 18 mm 18 mm 125 mm 250 mm 136 mm 8 x 18 mm 22 mm 125 mm 250 mm 144 mm 8 x 18 mm 18 mm 150 mm 285 mm 161 mm 8 x 22 mm 18 mm 150 mm 285 mm 173 mm 8 x 22 mm 22 mm 200 mm 340 mm 212 mm 8 x 22 mm 29 mm 200 mm 340 mm 225 mm 8 x 22 mm 29 mm 250 mm 395 mm 264 mm 12 x 22 mm 26 mm 250 mm 395 mm 279 mm 12 x 22 mm 26 mm 300 mm 445 mm 315 mm 12 x 22 mm 26 mm 300 mm 445 mm 329 mm 12 x 22 mm 26 mm 350 mm 505 mm 365 mm 22 x 16 mm 26 mm

Lap joint flanges (EN1092-1, DIN 2642, G-AlSi12)

DN D1 d2 (metr.) d2 (ISO) D3 S
20 mm 105 mm 28 mm 4 x 14 mm 14 mm
40 mm 150 mm 54 mm 4 x 18 mm 16 mm
50 mm 165 mm 65 mm 4 x 18 mm 18 mm
65 mm 185 mm 73 mm 4 x 18 mm 18 mm
65 mm 185 mm 81 mm 4 x 18 mm 18 mm
80 mm 200 mm 90 mm 8 x 18 mm 20 mm
80 mm 200 mm 94 mm 8 x 18 mm 20 mm
100 mm 220 mm 111 mm 8 x 18 mm 18 mm
100 mm 220 mm 119 mm 8 x 18 mm 18 mm
125 mm 250 mm 136 mm 8 x 18 mm 22 mm
125 mm 250 mm 144 mm 8 x 18 mm 18 mm
150 mm 285 mm 161 mm 8 x 22 mm 18 mm
150 mm 285 mm 173 mm 8 x 22 mm 22 mm
200 mm 340 mm 212 mm 8 x 22 mm 29 mm
200 mm 340 mm 225 mm 8 x 22 mm 29 mm
250 mm 395 mm 264 mm 12 x 22 mm 26 mm
250 mm 395 mm 279 mm 12 x 22 mm 26 mm
300 mm 445 mm 315 mm 12 x 22 mm 26 mm
300 mm 445 mm 329 mm 12 x 22 mm 26 mm
350 mm 505 mm 365 mm 22 x 16 mm 26 mm
Blind flanges (EN1092-1, DIN 2527, G-AlSi12) - DN D1 D3 S 25 mm 100 mm 4 x 11 mm 14 mm 32 mm 120 mm 4 x 14 mm 14 mm 40 mm 130 mm 4 x 14 mm 14 mm 65 mm 160 mm 4 x 14 mm 14 mm 80 mm 190 mm 8 x 18 mm 16 mm 100 mm 210 mm 8 x 18 mm 16 mm 125 mm 240 mm 8 x 18 mm 18 mm 150 mm 265 mm 8 x 18 mm 18 mm 200 mm 320 mm 8 x 18 mm 20 mm 250 mm 375 mm 12 x 18 mm 22 mm Blind flanges (EN1092-1, DIN 2527, G-AlSi12) - DN D1 D3 S 25 mm 100 mm 4 x 11 mm 14 mm 32 mm 120 mm 4 x 14 mm 14 mm 40 mm 130 mm 4 x 14 mm 14 mm 65 mm 160 mm 4 x 14 mm 14 mm 80 mm 190 mm 8 x 18 mm 16 mm 100 mm 210 mm 8 x 18 mm 16 mm 125 mm 240 mm 8 x 18 mm 18 mm 150 mm 265 mm 8 x 18 mm 18 mm 200 mm 320 mm 8 x 18 mm 20 mm 250 mm 375 mm 12 x 18 mm 22 mm

Blind flanges (EN1092-1, DIN 2527, G-AlSi12)

DN D1 D3 S
25 mm 100 mm 4 x 11 mm 14 mm
32 mm 120 mm 4 x 14 mm 14 mm
40 mm 130 mm 4 x 14 mm 14 mm
65 mm 160 mm 4 x 14 mm 14 mm
80 mm 190 mm 8 x 18 mm 16 mm
100 mm 210 mm 8 x 18 mm 16 mm
125 mm 240 mm 8 x 18 mm 18 mm
150 mm 265 mm 8 x 18 mm 18 mm
200 mm 320 mm 8 x 18 mm 20 mm
250 mm 375 mm 12 x 18 mm 22 mm
Welding flange (EN1092-1, DIN 2576, EN AW-5083 (AlMg4,5Mn)) - DN PN Info 20 mm 6 for round tube outside diameter 26,9 mm 20 mm 10 for round tube outside diameter 26,7 mm 25 mm 6 for round tube outside diameter 33,7 mm 25 mm 10 for round tube outside diameter 33,7 mm 32 mm 06 for round tube outside diameter 42,4 mm 32 mm 10 for round tube outside diameter 42,4 mm 40 mm 06 for round tube outside diameter 48,3 mm 40 mm 10 for round tube outside diameter 48,3 mm 50 mm 06 for round tube outside diameter 60,3 mm 50 mm 10 for round tube outside diameter 60,3 mm 65 mm 06 for round tube outside diameter 76,1 mm 65 mm 10 for round tube outside diameter 76,1 mm 80 mm 6 for round tube outside diameter 88,9 mm 80 mm 10 for round tube outside diameter 88,9 mm 100 mm 6 for round tube outside diameter 114,3 mm 100 mm 10 for round tube outside diameter 114,3 mm 125 mm 6 for round tube outside diameter 133 mm 125 mm 10 for round tube outside diameter 133 mm 150 mm 10 for round tube outside diameter 168 mm 200 mm 10 for round tube outside diameter 219,1 mm Welding flanges DIN 2576, available at short notice in EN AW-6082 (AlMgSi1) or in EN AW-5754 (AlMg3).

Welding flange (EN1092-1, DIN 2576, EN AW-5083 (AlMg4,5Mn))

DN PN Info
20 mm 6 for round tube outside diameter 26,9 mm
20 mm 10 for round tube outside diameter 26,7 mm
25 mm 6 for round tube outside diameter 33,7 mm
25 mm 10 for round tube outside diameter 33,7 mm
32 mm 06 for round tube outside diameter 42,4 mm
32 mm 10 for round tube outside diameter 42,4 mm
40 mm 06 for round tube outside diameter 48,3 mm
40 mm 10 for round tube outside diameter 48,3 mm
50 mm 06 for round tube outside diameter 60,3 mm
50 mm 10 for round tube outside diameter 60,3 mm
65 mm 06 for round tube outside diameter 76,1 mm
65 mm 10 for round tube outside diameter 76,1 mm
80 mm 6 for round tube outside diameter 88,9 mm
80 mm 10 for round tube outside diameter 88,9 mm
100 mm 6 for round tube outside diameter 114,3 mm
100 mm 10 for round tube outside diameter 114,3 mm
125 mm 6 for round tube outside diameter 133 mm
125 mm 10 for round tube outside diameter 133 mm
150 mm 10 for round tube outside diameter 168 mm
200 mm 10 for round tube outside diameter 219,1 mm

Welding flanges DIN 2576, available at short notice in EN AW-6082 (AlMgSi1) or in EN AW-5754 (AlMg3).

Tank-vehicle flanges (DIN 28460, EN AW-5754 (AlMg3)) - TW NW TW 1 DN 50 mm TW 1 DN 65 mm TW 1 DN 80 mm TW 3 DN 100 mm TW 3 DN 125 mm

Tank-vehicle flanges (DIN 28460, EN AW-5754 (AlMg3))

TW NW
TW 1 DN 50 mm
TW 1 DN 65 mm
TW 1 DN 80 mm
TW 3 DN 100 mm
TW 3 DN 125 mm
Tank-vehicle blind flanges (DIN 28459, EN AW-5754 (AlMg3)) - TW NW TW 1 DN 80 mm TW 3 DN 100 mm Tank-vehicle blind flanges (DIN 28459, EN AW-5754 (AlMg3)) - TW NW TW 1 DN 80 mm TW 3 DN 100 mm

Tank-vehicle blind flanges (DIN 28459, EN AW-5754 (AlMg3))

TW NW
TW 1 DN 80 mm
TW 3 DN 100 mm

Collars

Unturned welding flanges (DIN 2642) - DN Round tube Alloy 32 mm 38 x 3 mm EN AW-5754 (AlMg3) 40 mm 46 x 3 mm EN AW-5754 (AlMg3) 50 mm 56 x 3 mm EN AW-5754 (AlMg3) 50 mm 60 x 3 mm EN AW-5754 (AlMg3) 50 mm 60 x 5 mm EN AW-5754 (AlMg3) 65 mm 76,1 x 3 mm EN AW-5754 (AlMg3) 80 mm 86 x 3 mm EN AW-5754 (AlMg3) 80 mm 90 x 5 mm EN AW-5754 (AlMg3) 100 mm 106 x 3 mm EN AW-5754 (AlMg3) 100 mm 114 x 3 mm EN AW-5754 (AlMg3) 125 mm 131 x 3 mm EN AW-5754 (AlMg3) 139,7 x 3 mm EN AW-5083 (AlMg4,5Mn) 150 mm 156 x 3 mm EN AW-5754 (AlMg3) 150 mm 160 x 5 mm EN AW-5754 (AlMg3) 150 mm 168 x 4 mm EN AW-5754 (AlMg3) 200 mm 206 x 3 mm EN AW-5754 (AlMg3) 200 mm 208 x 4 mm EN AW-5754 (AlMg3) 200 mm 208 x 4 mm EN AW-1050A (Al99,5) 200 mm 219 x 4 mm EN AW-5754 (AlMg3) 250 mm 258 x 4 mm EN AW-5754 (AlMg3) 300 mm 306 x 3 mm EN AW-5754 (AlMg3) 300 mm 308 x 4 mm EN AW-5754 (AlMg3) Unturned welding flanges (DIN 2642) - DN Round tube Alloy 32 mm 38 x 3 mm EN AW-5754 (AlMg3) 40 mm 46 x 3 mm EN AW-5754 (AlMg3) 50 mm 56 x 3 mm EN AW-5754 (AlMg3) 50 mm 60 x 3 mm EN AW-5754 (AlMg3) 50 mm 60 x 5 mm EN AW-5754 (AlMg3) 65 mm 76,1 x 3 mm EN AW-5754 (AlMg3) 80 mm 86 x 3 mm EN AW-5754 (AlMg3) 80 mm 90 x 5 mm EN AW-5754 (AlMg3) 100 mm 106 x 3 mm EN AW-5754 (AlMg3) 100 mm 114 x 3 mm EN AW-5754 (AlMg3) 125 mm 131 x 3 mm EN AW-5754 (AlMg3) 139,7 x 3 mm EN AW-5083 (AlMg4,5Mn) 150 mm 156 x 3 mm EN AW-5754 (AlMg3) 150 mm 160 x 5 mm EN AW-5754 (AlMg3) 150 mm 168 x 4 mm EN AW-5754 (AlMg3) 200 mm 206 x 3 mm EN AW-5754 (AlMg3) 200 mm 208 x 4 mm EN AW-5754 (AlMg3) 200 mm 208 x 4 mm EN AW-1050A (Al99,5) 200 mm 219 x 4 mm EN AW-5754 (AlMg3) 250 mm 258 x 4 mm EN AW-5754 (AlMg3) 300 mm 306 x 3 mm EN AW-5754 (AlMg3) 300 mm 308 x 4 mm EN AW-5754 (AlMg3)

Unturned welding flanges (DIN 2642)

DN Round tube Alloy
32 mm 38 x 3 mm EN AW-5754 (AlMg3)
40 mm 46 x 3 mm EN AW-5754 (AlMg3)
50 mm 56 x 3 mm EN AW-5754 (AlMg3)
50 mm 60 x 3 mm EN AW-5754 (AlMg3)
50 mm 60 x 5 mm EN AW-5754 (AlMg3)
65 mm 76,1 x 3 mm EN AW-5754 (AlMg3)
80 mm 86 x 3 mm EN AW-5754 (AlMg3)
80 mm 90 x 5 mm EN AW-5754 (AlMg3)
100 mm 106 x 3 mm EN AW-5754 (AlMg3)
100 mm 114 x 3 mm EN AW-5754 (AlMg3)
125 mm 131 x 3 mm EN AW-5754 (AlMg3)
139,7 x 3 mm EN AW-5083 (AlMg4,5Mn)
150 mm 156 x 3 mm EN AW-5754 (AlMg3)
150 mm 160 x 5 mm EN AW-5754 (AlMg3)
150 mm 168 x 4 mm EN AW-5754 (AlMg3)
200 mm 206 x 3 mm EN AW-5754 (AlMg3)
200 mm 208 x 4 mm EN AW-5754 (AlMg3)
200 mm 208 x 4 mm EN AW-1050A (Al99,5)
200 mm 219 x 4 mm EN AW-5754 (AlMg3)
250 mm 258 x 4 mm EN AW-5754 (AlMg3)
300 mm 306 x 3 mm EN AW-5754 (AlMg3)
300 mm 308 x 4 mm EN AW-5754 (AlMg3)
Welding flanges (DIN 2642) - DN Round tube Alloy 250 mm 273 x 3 mm EN AW-5754 (AlMg3) Welding flanges (DIN 2642) - DN Round tube Alloy 250 mm 273 x 3 mm EN AW-5754 (AlMg3)

Welding flanges (DIN 2642)

DN Round tube Alloy
250 mm 273 x 3 mm EN AW-5754 (AlMg3)

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