1. Introduction
In modern industrial piping systems, ensuring the safety and durability of connections is crucial. Our high-quality 304/316/316L Class 150 RF threaded flanges meet the most stringent standards for precision and reliability. Our high-performance stainless steel threaded flanges provide a flexible solution for low-pressure environments where welding is impractical or restricted. Understanding the technical nuances between these material grades is crucial. Below is a detailed comparison of our 304/316/316L Class 150 RF threaded flange series based on chemical composition and performance.
2. Material Excellence - Technical Comparison: 304 vs. 316 vs. 316L
| Technical Specifications | SS304 (Standard Grade) | SS316 (Marine Grade) | SS316L (Low Carbon) |
| Material Standard | ASTM A182 F304 | ASTM A182 F316 | ASTM A182 F316L |
| Chromium (Cr) Content | 18.0 - 20.0% | 16.0 - 18.0% | 16.0 - 18.0% |
| Nickel (Ni) Content | 8.0 - 10.5% | 10.0 - 14.0% | 10.0 - 14.0% |
| Molybdenum (Mo) | — | 2.0 - 3.0% | 2.0 - 3.0% |
| Carbon (C) Max | 0.08% | 0.08% | 0.03% (Ultra Low) |
| Corrosion Resistance | High (General Environments) | Superior (Chloride Pitting) | Maximum (Anti-Sensitization) |
| Primary Application | Food & Beverage, HVAC | Marine & Coastal Piping | Chemical & Pharmaceutical |
| Product Linkage | SS304 Raised Face Flange | Forged SS316 Threaded Flange | 316L Stainless Steel Pipe Flange |
3. The impact of manufacturing processes on material properties.
The integrity of 304/316/316L Class 150 RF threaded flanges depends not only on their chemical composition but also on the manufacturing process. We specialize in providing forged SS316 threaded flanges, which offer superior metal grain flow compared to cast parts.
- Structural Density: Forging eliminates internal voids and gas pockets common in casting, ensuring that every Stainless Steel Female Threaded Flange can withstand its rated pressure without failure.
- Threading Precision: Our forging process enhances the machinability of the steel, resulting in cleaner, sharper NPT or BSP threads for a tighter leak-proof seal.
As a professional supplier of industrial stainless steel flanges, we ensure that every 316L stainless steel pipe flange is delivered with complete documentation.
- Full Traceability: Each flange is stamped with a unique Heat Number, linked directly to its raw material source.
- Certifications: We provide EN 10204 3.1 Material Test Certificates (MTC) with every order, detailing the chemical composition and mechanical properties to ensure your project meets ASME B16.5 and ASTM A182 regulatory requirements.
Quality Assurance: Our quality control team performs 100% dimensional inspection and PMI (Positive Material Identification) testing before shipment.
Understanding these material properties is just the first step; seeing how our 316L Stainless Steel Pipe Flanges perform under high-pressure and corrosive industrial environments is what truly sets us apart.
