Is 316 stainless steel pipe safe to drink from?
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Characteristics of 316 stainless steel
316 stainless steel is mainly composed of elements such as chromium, nickel and molybdenum, and has good corrosion resistance, high temperature resistance and oxidation resistance. It is more corrosion-resistant than 304 stainless steel, especially in environments containing chloride ions. 316 stainless steel pipes can also maintain good corrosion resistance in extreme use environments to ensure the safety of water quality.
316 Stainless Steel Pipes Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| 316 | min. | – | – | – | – | – | 16.0 | 2.0 | 10.0 | – |
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.0 | 14.0 | 0.10 | |
Stainless Steel 316 – 316L Pipe Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 316 – 316L | 515 | 205 | 40 | 95 | 217 |
Stainless Steel 316 Pipes Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 316 | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 740 |
Use scenarios of 316 stainless steel pipes
316 stainless steel pipes are often used for drinking water transmission, especially in water with high chloride content. Due to its excellent corrosion resistance, 316 stainless steel pipes are more durable in daily use and suitable for long-term use.
In summary, 316 stainless steel pipes are suitable for use as drinking water transmission pipes due to their excellent corrosion resistance and safety.
In terms of testing, GNEE is equipped with advanced testing equipment and has established a physical and chemical center, online and offline automatic eddy current flaw detection, water pressure test, underwater air tightness test, salt spray tester, universal tensile tester, hardness tester, CS analyzer, metallographic microscope, portable direct reading spectrometer, roughness detector, intergranular corrosion device, etc.
