ASTM A312 TP316 Stainless Steel Pressure Pipe
Surface Finish：Custom
Type:Seamless/Welded Pipe
Wall Thickness:Custom
Thickness:8mm - 50mm or Customized
Surface Finish:2b, Pickled, Bright Annealed, Polished,Brushed, Ep
Inspection:TUV, SGS, BV, ABS, Lr and So on
Delivery Time:7-40 Days
What is ASTM A312 TP316 stainless steel pressure pipe?
ASTM A312 TP316 stainless steel pressure pipe is an austenitic stainless steel pipe manufactured in accordance with the American ASTM standard. It is available in both seamless and welded forms. TP316 seamless pipes are suitable for high-pressure (≥15 MPa) and high-risk applications, while TP316 welded pipes are used in medium- and low-pressure systems. These pipes must pass stringent tests such as hydrostatic testing (≥1.5 times the design pressure) and intergranular corrosion testing. They are widely used in chemical processing, marine engineering, and pharmaceutical industries for transporting corrosive media and in pressure vessel piping systems.
316 stainless steel pipe for pressure applications
What makes TP316 better than TP304 in pressure applications?
Corrosion-resistant 316 stainless steel pipe contains molybdenum (Mo), which significantly enhances its resistance in aggressive media such as chlorides (e.g., seawater and brine), sulfuric acid, and acetic acid-offering 3 to 5 times better corrosion resistance than TP304. In contrast, TP304 is more susceptible to pitting corrosion in such environments.
Moreover, TP316 stainless steel pressure pipe exhibits superior oxidation resistance at temperatures up to 650°C, with allowable stress values 10–15% higher than those of TP304. This makes TP316 particularly suitable for higher-temperature applications, such as refinery heater pipelines.
316 stainless steel pipe Specification
| Property | Value |
|---|---|
| Standard | ASTM A312 |
| Grade | TP316 |
| Material Type | Austenitic Stainless Steel |
| Pipe Type | Seamless / Welded |
| Sizes Available | 1/8" NB to 24" NB |
| Wall Thickness | SCH 5S, SCH 10S, SCH 40, SCH 80 |
| Surface Finish | Annealed, Pickled, Polished |
Chemical Composition of TP316 (% by weight)
| Element | Content (%) |
|---|---|
| C | ≤ 0.08 |
| Mn | ≤ 2.00 |
| Si | ≤ 1.00 |
| P | ≤ 0.045 |
| S | ≤ 0.030 |
| Cr | 16.0 – 18.0 |
| Ni | 10.0 – 14.0 |
| Mo | 2.00 – 3.00 |
| Fe | Balance |
To calculate maximum allowable working pressure (MAWP), use the ASME formula:
Where:
P = Maximum allowable pressure
S = Allowable stress (depends on temperature)
t = Wall thickness
D = Outside diameter
E = Weld joint efficiency (typically 1.0 for seamless, 0.85–1.0 for welded)
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