Sanitary Union Fitting

What is a Sanitary Union Fitting ?

A Sanitary Union Fitting is a connecting element specifically designed for clean piping systems. Unlike ordinary industrial joints, Sanitary Union Fitting must meet three core requirements in their design: no residue, easy cleaning, and corrosion resistance. The sanitary union fittings manufactured by Kinding are made of high-quality 304 or 316L stainless steel. The inner walls are treated with both precision mechanical polishing and electrolytic polishing, resulting in a mirror-like surface. This ensures minimal friction during the flow of the medium, preventing bacteria and residues from adhering. Sanitary union fittings are not just mechanical connectors; they are the first line of defense to guarantee the quality of your products.

Common types and selection guidelines for sanitary union fittings: Kinding offers a full range of sanitary union fittings, suitable for various operational requirements:

1. Clamp-type union fitting (Tri-Clamp):

This is the most commonly used connection method in sanitary piping systems. The Kinding clamp-type union fitting consists of two symmetrical connector bodies, a sealing gasket, and a quick-release clamp. Its main advantage is that it can be quickly disassembled and assembled without tools, making it convenient for frequent cleaning and maintenance. The higher the pressure, the stronger the sealing performance. The Kinding clamp-type union fitting is widely used in food and beverage production lines, pharmaceutical liquid preparation systems, and other scenarios where frequent disassembly and cleaning are required.

2. Welded Joints:

For applications requiring permanent connections or those with extremely high aseptic standards, Kinding welded joints are the ideal choice. The joints are welded to the pipes using argon arc welding, resulting in a smooth and undented weld seam. This structure eliminates all potential leakage points and is particularly suitable for pure steam pipelines and aseptic filling equipment.

3. Threaded Union Fittings:

When the equipment interface is connected by threads, Kinding offers external thread/inner thread union fittings following the RNT or SMS standards. Different from traditional pipe threads, the sanitary thread union fittings adopt a fine-thread design, combined with conical or end face sealing structures. This not only ensures the convenience of connection but also avoids the threaded parts becoming breeding grounds for bacteria. Such union fittings are commonly used in instrument interfaces, sampling valve connections, and small equipment fittings.

4. Flanged Connections:

For large-diameter pipelines or high-pressure working conditions, Kinding sanitary flanged joints are manufactured in accordance with DIN, 3A, or ISO standards. The flange sealing surface adopts a smooth convex design, combined with sanitary gaskets, to ensure the cleanliness and pressure-bearing capacity at the connection point.

The Kinding sanitary union fittings are strictly designed in accordance with international sanitary standards such as 3A, DIN, ISO, BPE, and SMS. The inner wall transition fillets of all union fittings are all greater than 3mm, without any exposed threads, sharp edges or concave structures. This eliminates the possibility of material residue and microbial growth.

Kinding provides a variety of sealing gaskets made of materials such as EPDM, FKM, PTFE, and silicone rubber for sanitary union fittings. EPDM is resistant to high temperatures and CIP cleaning, FKM is resistant to oil, acids, and alkalis, PTFE is resistant to strong corrosion, and silicone rubber is suitable for biopharmaceuticals. When you purchase sanitary union fittings, Kinding engineers will recommend the most suitable gasket material based on your medium temperature, pressure, and chemical compatibility.

One-stop solution, simplifying the procurement process

As a comprehensive manufacturer with the capabilities of manufacturing tanks, valves and pipe union fittings, Kinding can provide you with a full-process supporting service from storage tanks to pipelines, from valves to union fittings. When you choose Kinding's sanitary union fittings, what you receive is not just a single product, but also the consistency guarantee of the entire piping system. Kinding has a complete warehousing system, and standard-sized sanitary union fittings are always in stock, which can meet the needs of emergency projects. We also support non-standard customization, including special materials, special sizes and surface treatment requirements.