Features And Advantages Of Customized Aseptic Din11864 Blind Flanges

For sterile connections in biopharmaceutical and food processing lines, the DIN11864 blank flange provides a secure, hygienic closure with electropolished Ra ≤ 0.4 µm surface finish – preventing bacterial adhesion and ensuring cleanability. Installation: position the blank flange over the mating ferrule, place an FDA‑compliant O‑ring, and secure with a suitable clamp. 

The Aseptic Standard – DIN11864 Overview

DIN11864 is a standard for aseptic pipe connections used in pharmaceutical and food industries. It defines O‑ring seals, flange geometry, and surface finish requirements. The standard ensures leak‑tight, sterile joints that withstand CIP and SIP cycles. The blank flange is a non‑perforated plate used to close off pipe ends, test ports, or temporary connections.

Blind Flange Configurations

The standard specifies several variants:

• DIN11864‑1 – O‑ring seals on the flange face; for clamp connections.

• DIN11864‑2 – O‑ring seals in a groove; for hygienic threaded unions.

• DIN11864‑3 – O‑ring seals on a conical flange; for clamped aseptic unions.

For a flush, crevice‑free closure, DIN11864‑1 Form A is the preferred choice.

Performance Specifications

Design Features

• High‑precision machining – accurate flange dimensions for reliable sealing.

• Electropolished finish – Ra ≤ 0.4 µm prevents biofilm formation.

• Crevice‑free design – no gaps or recesses for product entrapment.

• O‑ring retention groove – secures the seal in position.

• Material certification – available on request.

Surface Finish – Why Ra ≤ 0.4 µm Matters

Surface roughness affects cleanability and sterile operation. Smoother finishes prevent bacterial adhesion and biofilm growth. Electropolishing removes surface imperfections and enhances the chromium oxide layer. For sterile processing, Ra ≤ 0.4 µm supports validation and regulatory compliance.

Advantages of DIN11864 Blind Flanges

• Sterile design – crevice‑free and fully drainable.

• High cleanability – Ra ≤ 0.4 µm supports CIP/SIP.

• Corrosion resistance – SS316L with electropolish.

• Leak‑tight – precision O‑ring seating.

• Standardized – compatible with existing unions.

Typical Applications

• Biopharmaceutical – temporary closures for fermenter ports.

• Food processing – sealing off cleaning or sampling connections.

• CIP systems – blanking unused ports during cleaning cycles.

• Sterile water loops – closures for test and sample points.

Installation and Maintenance

1. Select the correct DIN11864 variant for the connection type.

2. Install the O‑ring in the designated groove or face.

3. Position the blank flange against the mating ferrule.

4. Secure with the appropriate clamp or threaded union.

5. Inspect O‑ring for compression set and replace as needed.

6. Perform a leak test at 1.1× working pressure for 10 minutes.

The DIN11864 blank flange provides a sterile, high‑precision closure for aseptic processing, combining SS316L construction with electropolished surface finish. Its crevice‑free design and Ra ≤ 0.4 µm finish ensure cleanability and reliable sealing, supporting validation in biopharmaceutical and food applications.

DIN 11864 Aseptic Blank Male

• DIN11864 aseptic fittings meet the exacting needs of food, chemical and pharmaceutical industries.
• Available with optional lengths to suit Orbital and Manual Welding, these unions have been designed to match tube and pipe specifications in DIN 11850; ISO 2037, ASME BPE 2002 and BS 4825 Part 1 and also ISO 1127 for schedule pipe.
• DIN11864-1 union consists of four parts: Nut, Male, Liner and Gasket.

Product Description

Product Parameter