316L Stainless Steel Flange Detail Page
I. Product Overview
The 316L stainless steel flange is a key fitting for pipeline systems, made from ultra-low carbon 316L stainless steel as the core raw material. Benefiting from the molybdenum element and ultra-low carbon content in 316L stainless steel itself, it exhibits excellent performance in corrosion resistance and low-temperature stability. It can accurately realize pipeline connection, branching, sealing and other functions, and is a core supporting component for pipeline systems under harsh working conditions such as chemical industry, medical treatment and food industry.
II. Core Advantages
1. Superb Corrosion Resistance
Compared with 304 stainless steel flanges, 316L flanges have significantly improved corrosion resistance to seawater, acid-alkali solutions and chloride environments due to the addition of molybdenum element, which can effectively resist the erosion of corrosive media in chemical production.
The ultra-low carbon content effectively prevents intergranular corrosion (a common issue in stainless steels under high-temperature or corrosive conditions), ensuring long-term stable operation of the flange in high-temperature processing scenarios such as food sterilization and pharmaceutical distillation.
2. Excellent Low-Temperature Performance
With good toughness and structural stability at low temperatures (down to -196°C), 316L flanges are suitable for low-temperature pipeline systems, such as those in cryogenic storage of liquid natural gas (LNG) and low-temperature pharmaceutical refrigeration, without cracking or performance degradation.
3. High Mechanical Strength & Durability
The 316L stainless steel material has high tensile strength and yield strength, enabling the flange to bear high pipeline pressure and external loads. It is not easy to deform or damage during long-term use, reducing the frequency of maintenance and replacement and lowering overall operating costs.
4. Compliance with Hygienic Standards
The smooth surface of 316L stainless steel is easy to clean and not prone to material adhesion or bacterial growth. It meets international hygienic standards (such as FDA, 3A) and is widely used in food processing (beverage, dairy) and pharmaceutical production pipelines to ensure product hygiene and safety.
III. Product Specifications
| Specification Category | Details |
|---|---|
| Material Grade | 316L stainless steel (UNS S31603, DIN 1.4404) |
| Pressure Rating | ANSI Class 150-2500, PN 6-PN 400 (customizable for special pressures) |
| Connection Type | Weld Neck Flange, Slip-On Flange, Socket Weld Flange, Blind Flange, Threaded Flange |
| Seal Face Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue and Groove (T&G) |
| Size Range | 1/2" (DN15) - 48" (DN1200) (supporting non-standard size customization) |
| Surface Treatment | Pickling, Passivation, Polishing (Ra ≤ 0.8μm for hygienic scenarios) |
IV. Application Scenarios
Chemical Industry: Used in pipelines for transporting corrosive media (sulfuric acid, nitric acid, chemical solvents) and high-temperature reaction systems.
Medical & Pharmaceutical Industry: Applied in drug synthesis pipelines, sterile water systems, and medical device connecting pipelines.
Food & Beverage Industry: Suitable for dairy processing, beverage blending, and food sterilization pipelines to meet hygienic requirements.
Marine Engineering: Used in offshore oil and gas pipelines, seawater desalination systems, with strong resistance to seawater corrosion.
Cryogenic Engineering: Applied in LNG storage and transportation pipelines, low-temperature refrigeration equipment pipelines, adapting to ultra-low-temperature environments.
V. Quality Assurance
Raw Material Inspection: Each batch of 316L stainless steel raw materials is inspected for chemical composition (via spectrometry) and mechanical properties (tensile, impact tests) to ensure compliance with standards.
Manufacturing Process Control: Adopt precision forging, CNC machining, and automatic welding (for weld neck flanges) to ensure dimensional accuracy and structural integrity.
Final Testing: Conduct pressure testing (hydrostatic test, pneumatic test), corrosion testing (salt spray test), and non-destructive testing (UT, RT) to eliminate defective products.
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