ASTM A312 TP316L Stainless steel seamless pipe
Grade 316L is an austenitic stainless steel that can operate from 450 degrees Celsius to 850 degrees Celsius roughly. The range differs depending on the pressure of a system, the components flowing inside the pipe and the environment outside it. Marine environment is full of chloride ions and the wind and water are salty.

The salty conditions catalyze all forms of corrosions because they act as a medium for electron transfer for oxidation and reduction chemical reactions. The 316L stainless steel pipe has a lower carbon content than the ASTM A312 TP316 which means, there is less intergranular precipitation and local corrosion due to welding. Also, the material has molybdenum in addition to chromium and nickel which is specifically resistant to chloride ion stress corrosion.
316L Stainless Steel Pipe Specification
| Standard Specification | ASTM A312 TP316L ASME SA312 TP316L |
| Size | ½ to 6 Inch Nominal Bore |
| Schedule Pipe Thickness Range | Schedule 60, XS, Schedule 160, Schedule 120, STD, Schedule 40, Schedule 140, Schedule 20, Schedule 80, Schedule 80, XXS, Schedule 30, Supplier in Mumbai |
| Wall Thickness | 0.1 – 60 mm |
| Length | Single Random Length 5 to 7 MeterDouble Random Length 10 – 12 Meter |
| Standard | DIN, JIS, ASTM, GB, ASME, AISI, AMS, EN, GOST |
| Types | Welded, Seamless, ERW, EFW Supplier and Manufacturer |
| Manufacturing Shapes | Round, Box Section, Square, Rectangle |
| Surface Finish | Polished, Bright, Annealing, Cold Finish, Pickling |
| Technique | Cold Rolled Hot Rolled |
| Manufacturing Technology | Hot Cold Formed |
316L SS Seamless Pipe Equivalent Material
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 316L | 1.4404 / 1.4435 | S31603 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17-11-02 / Z3CND18-14-03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
Composition Standard of ASTM A312 TP 316L Pipe
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Fe |
| SS 316L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.00 – 18.00 | 2.00 – 3.00 | 10.00 – 14.00 | 68.89 min |
Mechanical Properties of ASTM A312 TP 316L Stainless Steel Seamless Pipe
| Grade | Tensile Strength(Mpa) | Yield Point(Mpa) | Elongation(%) |
| 316L | 485 | 170 | 35 |
Physical Properties of ASTM A312 TP 316L Stainless Steel Seamless Pipe
| GRADE | DENSITY (KG/M3) | ELASTIC MODULUS (GPA) | MEAN CO-EFF OF THERMAL EXPANSION (ΜM/M/°C) | THERMAL CONDUCTIVITY (W/M.K) | SPECIFIC HEAT 0-100°C (J/KG.K) | ELEC RESISTIVITY (NΩ.M) | |||
| 0-100°C | 0-315°C | 0-538°C | AT 100°C | AT 500°C | |||||
| 316L/H | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 74 |
ASTM A312 TP316L PIPE SIZE CHART
| NPS | O.D. (in) | 10 | 160 | 80 | 40 |
| 1/8″ | .405 | .049 | .095 | .068 | |
| 1/4″ | .540 | .065 | .119 | .088 | |
| 3/8″ | .675 | .065 | .126 | .091 | |
| 1/2″ | .840 | .083 | .187 | .147 | .109 |
| 3/4″ | 1.050 | .083 | .218 | .154 | .113 |
| 1″ | 1.315 | .109 | .250 | .179 | .133 |
| 1 1/4″ | 1.660 | .109 | .250 | .191 | .140 |
| 1 1/2″ | 1.900 | .109 | .281 | .200 | .145 |
| 2″ | 2.375 | .109 | .343 | .218 | .154 |
| 2 1/2″ | 2.875 | .120 | .375 | .276 | .203 |
| 3″ | 3.500 | .120 | .437 | .300 | .216 |
| 3 1/2″ | 4.000 | .120 | .318 | .226 | |
| 4″ | 4.500 | .120 | .531 | .337 | .237 |
| 4 1/2″ | 5.000 | ||||
| 5″ | 5.563 | .134 | .625 | .375 | .258 |
| 6″ | 6.625 | .134 | .718 | .432 | .280 |
| 7″ | 7.625 | ||||
| 8″ | 8.625 | .148 | .906 | .500 | .322 |
| 9″ | 9.625 | ||||
| 10″ | 10.750 | .165 | 1.125 | .593 | .365 |
| 11″ | 11.750 | ||||
| 12″ | 12.750 | .180 | 1.312 | .687 | .406 |
| 14″ | 14.000 | .250 | 1.406 | .750 | .437 |
| 16″ | 16.000 | .250 | 1.593 | .843 | .500 |
| 18″ | 18.000 | .250 | 1.781 | .937 | .562 |
ASTM A312 Stainless Steel Pipe Tolerances
| OD | Tolerance | WTH, mm | Length, mm |
| 10.3 to 48.3 | +0.40/-0.80 | +/-12.5%t | +6/-0 |
| over 48.3 to 114.3 | +0.80/-0.08 | ||
| over 114.3 to 219.1 | +1.60/-0.80 | ||
| over 219.1 to 457.2 | +2.40/-0.80 | ||
| over 457.2 to 660.4 | +3.20/-0.80 | ||
| over 660.4 to 864 | +4.00/-0.08 | ||
| over 864 to 1219.2 | +4.80/-0.08 |
Wall Thickness tolerance of ASTM A312 TP316L
| NPS | Wall Thickness Tolerance, % |
| 1/8 To 2-1/2 Incl., All T/D Ratios | Over 20.2 Under 12.5 |
| Over 3 To 18 Incl., T/D Up To 5% Incl. | Over 22.5 Under 12.5 |
| Over 3 To 18, Incl., T/D > 5% | Over 15.0 Under 12.5 |
| 20 And Large, Welded, All T/D Ratios | Over 17.5 Under 12.5 |
| 20 And Large, Seamless, T/D Up To 5% Incl. | Over 22.5 Under 12.5 |
| >20 And Large, Seamless, T/D > 5% | Over 15.0 Under 12.5 |
316l stainless steel pipe pressure rating
| e Size (inches) | Pipe Schedule | Outside Diameter (in) | Wall Thickness (in) | Pressure Rating (psig) | ||||||||
| Temperature (oF) | ||||||||||||
| 100 | 200 | 300 | 400 | 500 | 600 | 650 | 700 | 750 | ||||
| Allowable Stress (psi) | ||||||||||||
| 16700 | 16700 | 16700 | 15500 | 14400 | 13500 | 13200 | 12900 | 12600 | ||||
| 1″ | 40 | 1.315 | 0.133 | 2205 | 2205 | 2205 | 2047 | 1902 | 1783 | 1743 | 1703 | 1664 |
| 80 | 1.315 | 0.179 | 3061 | 3061 | 3061 | 2841 | 2640 | 2475 | 2420 | 2365 | 2310 | |
| 160 | 1.315 | 0.250 | 4493 | 4493 | 4493 | 4170 | 3874 | 3632 | 3552 | 3471 | 3390 | |
| 1 1/2″ | 40 | 1.900 | 0.145 | 1629 | 1629 | 1629 | 1512 | 1404 | 1317 | 1287 | 1258 | 1229 |
| 80 | 1.900 | 0.200 | 2303 | 2303 | 2303 | 2138 | 1986 | 1862 | 1821 | 1779 | 1738 | |
| 160 | 1.900 | 0.281 | 3362 | 3362 | 3362 | 3120 | 2899 | 2717 | 2657 | 2597 | 2536 | |
| 2″ | 40 | 2.375 | 0.154 | 1371 | 1371 | 1371 | 1272 | 1182 | 1108 | 1083 | 1059 | 1034 |
| 80 | 2.375 | 0.218 | 1985 | 1985 | 1985 | 1843 | 1712 | 1605 | 1569 | 1534 | 1498 | |
| 160 | 2.375 | 0.344 | 3283 | 3283 | 3283 | 3047 | 2831 | 2654 | 2595 | 2536 | 2477 | |
| 3″ | 40 | 3.500 | 0.216 | 1301 | 1301 | 1301 | 1208 | 1122 | 1052 | 1028 | 1005 | 982 |
| 80 | 3.500 | 0.300 | 1844 | 1844 | 1844 | 1712 | 1590 | 1491 | 1458 | 1425 | 1391 | |
| 160 | 3.500 | 0.438 | 2787 | 2787 | 2787 | 2587 | 2403 | 2253 | 2203 | 2153 | 2103 | |
| 4″ | 40 | 4.500 | 0.237 | 1102 | 1102 | 1102 | 1023 | 950 | 891 | 871 | 851 | 831 |
| 80 | 4.500 | 0.337 | 1596 | 1596 | 1596 | 1482 | 1377 | 1291 | 1262 | 1233 | 1204 | |
| 160 | 4.500 | 0.531 | 2611 | 2611 | 2611 | 2424 | 2552 | 2111 | 2064 | 2017 | 1970 | |
| 5″ | 40 | 5.563 | 0.258 | 965 | 965 | 965 | 896 | 832 | 780 | 763 | 746 | 728 |
| 80 | 5.563 | 0.375 | 1428 | 1428 | 1428 | 1325 | 1231 | 1154 | 1129 | 1103 | 1077 | |
| 160 | 5.563 | 0.625 | 2474 | 2474 | 2474 | 2296 | 2133 | 2000 | 1955 | 1911 | 1866 | |
| 6″ | 40 | 6.625 | 0.280 | 877 | 877 | 877 | 814 | 756 | 709 | 693 | 677 | 661 |
| 80 | 6.625 | 0.432 | 1379 | 1379 | 1379 | 1280 | 1189 | 1115 | 1090 | 1065 | 1040 | |
| 160 | 6.625 | 0.719 | 2382 | 2382 | 2382 | 2211 | 2054 | 1925 | 1883 | 1840 | 1797 | |
| 8″ | 40 | 8.625 | 0.322 | 771 | 771 | 771 | 716 | 665 | 623 | 610 | 596 | 582 |
| 80 | 8.625 | 0.500 | 1218 | 1218 | 1218 | 1131 | 1050 | 985 | 963 | 941 | 919 | |
| 160 | 8.625 | 0.906 | 2298 | 2298 | 2298 | 2133 | 1982 | 1858 | 1817 | 1775 | 1734 | |
| 10″ | 40 | 10.750 | 0.365 | 699 | 699 | 699 | 649 | 603 | 565 | 553 | 540 | 528 |
| 80 | 10.750 | 0.594 | 1159 | 1159 | 1159 | 1075 | 999 | 937 | 916 | 895 | 874 | |
| 160 | 10.750 | 1.125 | 2289 | 2289 | 2289 | 2124 | 1974 | 1850 | 1809 | 1768 | 1727 | |
ASTM A312 TP 316L Stainless Steel Pipe Roughness
| Material Surface | Absolute Roughness Coefficient ε mm |
| Aluminum Alloy, Lead | 0.001 – 0.002 |
| Drawn Copper/ Brass | 0.0015 |
| 316L Stainless Steel | 0.015 |
Heat Treatment
ASTM A312 TP316L grade minimum solution temperature is 1040 degree, then and cool rapidly, it can not be harden by annealing, both seamless and welded stainless steel pipes shall be furnished in heat treatment condition comply to ASTM A312 specification.
316L Stainless Steel Seamless Pipes Applications
Trailers
Heat Exchangers
Food processing equipment
Kitchen benches, sinks, troughs, equipment and appliances
construction materials
Threaded fasteners
Chemical containers, including for transport
Automotive trim
Architectural applications
Railway cars
Woven or welded screens for mining, quarrying & water filtration
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