DIN Standard Stainless Steel Threaded Unions

DIN Standard Stainless Steel Threaded Unions: Hygienic & Industrial Connectors1. Product OverviewDIN Stainless Steel Threaded Unions are precision-engineered pipeline connectors manufactured in accordance with German Industrial Standards (DIN). Crafted from high-quality stainless steel, they are

Model NO.： DIN
Material： Stainless Steel
Pressure：
Customized： Available
Certificate： ISO9001:2015
Trademark： DELOX / OEM

CONTACT NOW down load to pdf

Product Details

DIN Standard Stainless Steel Threaded Unions: Hygienic & Industrial Connectors

1. Product Overview

DIN Stainless Steel Threaded Unions are precision-engineered pipeline connectors manufactured in accordance with German Industrial Standards (DIN). Crafted from high-quality stainless steel, they are designed for use in demanding sectors where hygiene, corrosion resistance, and reliable sealing are critical. These unions facilitate secure and leak-proof connections in piping systems for a wide range of media .

2. Core Construction & Features

2.1. Material

The union body is typically constructed from AISI 304 or 316L stainless steel, offering excellent resistance to corrosion and high temperatures. These materials meet stringent hygienic requirements, making them suitable for transporting diverse media, including aggressive substances in industrial settings and high-purity products in food and pharmaceutical applications .

2.2. Thread Design

The thread design complies with DIN standards, such as DIN 2999 for Whitworth pipe threads (55° thread angle, 1:16 taper), ensuring compatibility with British Standard Pipe (BSP) series while adhering to stricter tolerances .
Certain models utilize metric threads designed for bite-type fittings (ferrules), which create a seal by mechanically gripping the tube, often eliminating the need for additional sealing elements .

2.3. Structural Forms

These unions are available in various configurations, primarily including:

Bite-type (Ferrule) Fittings: Comprising a ferrule, nut, and adapter. This design provides a strong mechanical grip and seal on the tubing.
Threaded Unions: Consisting of sealing components, a nut, and an adapter.
A significant advantage of these designs is that they do not require welding, thereby saving subsequent steps like pickling and non-destructive testing, which streamlines installation and reduces overall project time and labor costs .

3. Key Advantages

Advantage	Description
Hygienic Design	The internal surface boasts a low roughness average (Ra < 0.6 μm, with options for Ra < 0.4 μm available). This smooth, crevice-free finish minimizes the risk of microbial buildup, supports effective Clean-in-Place (CIP) and Steam-in-Place (SIP) processes, and complies with Good Manufacturing Practice (GMP) norms .
Reliable Sealing	The sealing is achieved through the precision thread engagement or the ferrule's bite mechanism. Some types function effectively without O-rings or other elastomers, as the ferrule's cutting edges grip the tube surface securely, ensuring leak-tight performance even under high working pressures and in high-vibration environments .
Standardized Compatibility	Manufactured in accordance with standards like DIN 2353 and DIN EN ISO 8434-1, these unions ensure interchangeability with fittings from other brands. They also support reducing connections for different pipe sizes .
Ease of Installation	The threaded, non-welded design significantly simplifies construction. It eliminates the need for post-weld treatments like pickling and inspection, drastically reducing pipeline cleaning time and making installation simpler and more cost-effective .

4. Technical Specifications (Summary)

Parameter	Typical Specification / Range
Primary Materials	AISI 304, 316L Stainless Steel
Common Standards	DIN 2999 (Threads), DIN 2353 (Fittings)
Pressure Rating (Example)	PN 10 (or other classes depending on design standard)
Temperature Range	Suitable for a wide range, from negative temperatures up to several hundred degrees Celsius, depending on the material and seal .
Common Sizes	DN15 to DN150 (1/2" to 6") and larger custom sizes are available .

5. Typical Applications

This versatile union is designed for critical use in numerous sectors, including :

Food & Beverage Industry: Used in aseptic piping lines for dairy, beer, juices, etc., to prevent contamination.
Pharmaceutical & Bioprocessing: Suitable for high-purity fluid transfer (e.g., vaccines, biologics), supporting SIP sterilization.
Chemical & Fine Chemical Industry: For conveying corrosive media (e.g., acids, alkalis); 316L stainless steel or PTFE-lined models offer enhanced chemical resistance.
General Industrial Use: Commonly found in various industrial control panels, test, and measurement equipment due to their standardized, easy-to-maintain design.

6. Selection Guide

Choosing the right union involves considering the following factors:

Material Compatibility: Select AISI 304 stainless steel for general purposes. Choose AISI 316L for environments with higher corrosion risks, such as those involving chlorides or aggressive chemicals .
Size and Pressure Rating: Select the appropriate thread size (e.g., DN15-DN150) based on the pipe diameter and ensure the pressure rating (e.g., PN10) meets or exceeds the system's maximum operating pressure . Standards like DIN 2353 define different pressure series (e.g., Light, Heavy) to match application requirements .
Sealing Design: Choose the sealing mechanism (e.g., ferrule bite, elastomeric seal) based on the fluid characteristics, temperature, and hygiene requirements.

Note: This datasheet provides a general overview. Specifications may vary. Please consult our technical team for application-specific recommendations and detailed dimensional data.