DIN 3356 is the core standard in the field of German industrial valves, its definition and application are as follows:
1. Positioning of the standard
Scope of application: mainly regulates the structure, performance and test requirements of steel valves used in industrial piping systems, covering globe valves, Check valves and other types, especially for petroleum, chemical, steam and other high-pressure scenarios.
Version: Contains a number of substandards (e.g. DIN 3356-1 for the basic parameters of globe valves), and some chapters are used in conjunction with DIN EN 12266 (Valve test standard).
2. Technical Requirements
Structural Design
Connection Mode: Support flange, internal thread (silk buckle) and other interface forms, structural length in accordance with DIN 3202 and other supporting standards. Standard.
Seal programme: bellows seal, metal hard seal or elastic non-metallic seal can be selected, suitable for high temperature and high pressure media (such as steam, oil).
Material requirements
Body materials include cast steel (e.g. GS-C25), ductile iron, stainless steel, etc., with pressure ratings from PN16 to PN40.
Test methods
Shell strength and sealing tests are carried out with reference to DIN EN 12266. High-pressure valves need to additionally verify the stability of performance after deep-cooling treatment.
3. Typical Products and Applications
Globe Valves
For example, DN300 cast steel bellows globe valves are suitable for high-temperature and high-pressure steam systems, combining corrosion resistance and low leakage characteristics.
Check Valves
German standard steel check valves (DIN3356) are used for one-way flow control to prevent backflow of media, commonly used in chemical pipelines.
Low-pressure manual valves
PN16 grade cast iron globe valves for low-pressure water, gas and other non-corrosive media.
4. The industry adaptability
supporting standards: and DIN 3202 (structure length), DIN 2543 (flange size), etc. together constitute a complete German standard valve system.
Global compatibility: GNEE Group valves can be combined with API, JIS and other standards to optimise the design to meet the needs of multinational projects.
DIN 3356 ensures the reliability and long-term service life of valves under severe conditions by unifying technical specifications and testing procedures.
