What is ASTM A270 TP316 stainless steel sanitary pipe?
What is ASTM A270 TP316 stainless steel sanitary pipe?
ASTM A270 TP316 is a type of stainless steel sanitary pipe that meets the ASTM A270 standard, which specifies requirements for seamless and welded austenitic and ferritic/austenitic stainless steel tubing for hygienic applications like the dairy and food industry. The "TP316" designation refers to the specific grade of stainless steel, which is an austenitic grade with excellent corrosion resistance due to high levels of nickel, chromium, and molybdenum. Key features include strict surface finish requirements and thorough testing to ensure cleanliness and prevent contamination.
A270/A270M TP316 stainless steel sanitary pipe Chemical Composition:
| Grade | UNS
Design |
Composition, % | ||||||||||
| C | Mn | P | S | Si | Cr | Ni | Mb | Ti | Nb | N | ||
| TP316 | S31600 | 0.08 | 2 | 0.045 | 0.03 | 1 | 16.0–18 | 10.0–14 | 2.00–3 | . . . | . . . | . . . |
| TP316L | S31603 | 0.035 | 2 | 0.045 | 0.03 | 1 | 16.0–18 | 10.0–14 | 2.00–3 | . . . | . . . | . . . |
A270/A270M Standard Mechanical Properties
ASTM A270 (also known as A270/A270M-15/19) specifies minimum tensile strength, minimum yield strength, minimum elongation, and maximum Rockwell hardness.
| Grade (UNS) | Tensile Strength, min (ksi [MPa]) | Yield Strength, min (0.2% offset) (ksi [MPa]) | Elongation in 2 in., min (%) | Rockwell Hardness, max |
|---|---|---|---|---|
| TP316 (S31600) | 75 [515] | 30 [205] | 35 | B90 |
| TP316L (S31603) | 70 [485] | 25 [170] | 35 | B90 |
A270/A270M Standard Dimensional Tolerance
| OD Size | Nominal wall | Outside Dia | Length | Wall |
| 1/2″ (12.7) | 0.065″ (1.65) | +/-0.005 (0.13) | +1/8″ (3.18)/-0 | +/-10% |
| 3/4″ (19.1) | 0.065″ (1.65) | +/-0.005 (0.13) | +1/8″ (3.18)/-0 | +/-10% |
| 1″ (25.4) | 0.065″ (1.65) | +/-0.005 (0.13) | +1/8″ (3.18)/-0 | +/-10% |
| 1-1/2″ (38.1) | 0.065″ (1.65) | +/-0.008 (0.20) | +1/8″ (3.18)/-0 | +/-10% |
| 2″ (50.8) | 0.065″ (1.65) | +/-0.008 (0.20) | +1/8″ (3.18)/-0 | +/-10% |
| 2-1/2″ (63.5) | 0.065″ (1.65) | +/-0.010 (0.25) | +1/8″ (3.18)/-0 | +/-10% |
| 3″ (76.2) | 0.065″ (1.65) | +/-0.010 (0.25) | +1/8″ (3.18)/-0 | +/-10% |
| 4″ (101.6) | 0.083″ (2.11) | +/-0.015 (0.38) | +1/8″ (3.18)/-0 | +/-10% |
| 6″ (152.4) | 0.109″ (2.77) | +/-0.030 (0.76) | +3/16″ (4.76)/-0 | +/-10% |
| 8″ (203.2) | 0.109″ (2.77) | +/-0.030 (0.76) | +3/16″ (4.76)/-0 | +/-10% |
Heat Treatment (Annealing):
Inline hydrogen bright annealing to 1900°F (1040° C) minimum followed with a rapid quench.
Surface Finishes
Surface finish is 20 µ-in Ra (0.5 µm) ID maximum, 30 µ-in Ra (0.8 µm) OD maximum surface roughness measured per ASME ANSI B46.1 with the profilometer reading at 90 degrees to the lay. Other finishes available upon request.
If you have project requirements for 316 stainless steel sanitary pipe, please feel free to place an order. GNEE has a large inventory of popular products for you to choose from.
We stock all sanitary tube sizes from 1/2" (12.7 mm) to 8" (203.2 mm) OD in 20 ft. standard lengths. Custom lengths and sizes are available upon request. It is certified to the requirements of ASTM A270, 3A standards and most user specifications.
ASTM A270 A270M ASME SA270 Grades TP304L and TP316L available from stock. Other grades are available upon request.
Click to download ASTM A270 material list
For 316/316Lstainless steel pipe (A270), we offer several packaging options:
1. Big bundles
2. Small bundles
3. Wooden crates
4. Steel crates
Each pipe is individually wrapped in polyethylene film to protect its surface gloss.
