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D31W-DIN11852-CONCENTRIC REDUCER

The DIN 11852 Concentric Reducer is a high-quality sanitary pipe fitting designed to transition between two different pipe diameters while maintaining a common centerline. Also referred to as a DIN 11852 Weld Reducer or Concentric Weld Reducer, this fitting allows for a smooth, hygienic reduction in pipe size within a sanitary piping system
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Key Features

  • Concentric Flow Reduction – Reduces pipe diameter from a larger size to a smaller size while maintaining a common centerline, ensuring smooth fluid transition without offset

  • DIN 11852 Standard Compliance – Manufactured to DIN 11852 / EN 10374 standards, ensuring dimensional accuracy and interchangeability

  • Weld-On End Connections – Designed for permanent butt-weld installation, suitable for CIP (Clean-In-Place) and SIP (Sterilize-In-Place) systems

  • Hygienic Crevice-Free Design – Smooth internal and external surfaces minimize bacterial growth and ensure sanitary integrity

  • High Corrosion Resistance – Constructed from premium 304 (1.4301) and 316L (1.4404) stainless steel

  • Polished Surface FinishRa < 0.8 μm (240 grit) internal and external polish for easy cleaning and superior hygiene

Advantages

  • Smooth Flow Transition – Concentric design ensures favorable flow characteristics with minimal turbulence, pressure drop, or air entrapment

  • Hygienic Operation – Crevice-free design and polished surface finish meet 3A Sanitary Standards, eliminating pooling and cross-contamination risks

  • Permanent, Reliable Connection – Butt-weld installation provides a secure, leak-proof joint that does not require disassembly

  • CIP/SIP Compatible – Designed to support Clean-In-Place and Sterilize-In-Place procedures with no dead legs or harborage sites

  • Versatile Applications – Suitable for food processing, beverage production, dairy, pharmaceutical, biotech, and fine chemical industries

  • Long Service Life – Stainless steel construction with 3A certification ensures superior durability under repeated sanitization cycles

How It Works

The DIN 11852 Concentric Reducer operates as a permanent transition component within a sanitary piping system:

  1. Positioning – The reducer is installed at the point where a larger diameter pipe transitions to a smaller diameter pipe

  2. Welding – The weld-on ends are butt-welded to the adjacent tubing sections, creating a permanent, hygienic joint

  3. Flow Redirection – The concentric design smoothly guides fluid from the larger diameter to the smaller diameter while maintaining a common centerline, ensuring efficient flow without offset

  4. Hygienic Operation – The smooth, crevice-free internal surface prevents product residue buildup and supports effective CIP cleaning

  5. System Integration – Once welded in place, the reducer becomes a permanent part of the piping system, providing reliable, long-term service

Use
Air
Beverage
Dairy
Deionized Water
Food
Pharmaceuticals
Wate
Temperature
250° F
except hose fittings are unrated.
Material
Use with 304/316L stainless steel tubes that meets ASTM A269 or ASTM A270
Certification
Material Certificate with Traceable Lot Number and Test Report
Specifications
3-A
Finish
No. 7 - ID & OD
DIN 11852 concentric reducer dimensions stainless steel sanitary weld fitting

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CONTACT INFORMATION

If you have any questions or need help, feel free to contact with our team. We are available 24/7 by fax, 
e-mail or by phone. 
   valve@wzststeel.com
   +86-15858536788/+-86-577-86896059
  Binhai Industry Zone, Wenzhou, Zhejiang, China

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