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Neeka Tubes is a leading manufacturer of Stainless Steel 321 Seamless Pipe. Offering high-quality products in various types. Including Round, Square, Rectangle, Coil “U” Shape. Stainless Steel 321 Seamless Pipe is made from a titanium-stabilized austenitic stainless steel. Known for its excellent resistance to high temperatures, oxidation and intergranular corrosion. This grade maintains strength and durability even in extreme conditions. This assure durable reliability and superior mechanical properties.
Our high-quality UNS S32100 Seamless Pipes, known for their excellent strength and durability. These pipes contain 9-12% Nickel and 17-19% Chromium providing outstanding corrosion and oxidation resistance. With a tensile strength of 515 MPa and yield strength of 205 MPa SS 321 ensures excellent mechanical performance. It also has a hardness of up to 95 HRB. Making it strong yet workable. These properties make SS 321 Seamless Pipes highly reliable for demanding conditions.









| Standard | AISI, DIN, EN, GB, JIS, ASTM, ASME |
| Pipe Dimensions | ANSI/ASME B36.19, B36.10 |
| Range | 6NB to 1200NB |
| Outer Diameter | 1/8″ NPS to 12″ NPS |
| Thickness | 0.6 mm to 12.7 mm |
| Schedules | SCH. 5, SCH 10, SCH 20, SCH 30, SCH 40, SCH 60, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, SCH XXS |
| Length | Single Random, Double Random & Cut Length |
| Specifications | ASTM A312 / ASTM SA312 |
| Types | Round, Square, Rectangle, Hydraulic, Honed Pipe |
| End | Plain End, Beveled End |
| Grade | Ni | N | Cr | C | Si | Mn | P | S | TI |
| SS 321 | 09 – 12 | 0.10 | 17 β 19 | 0.08 max | 1 max | 2 max | 0.040 max | 0.030 max | 4(C+N) |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| SS 321 | 8.0 g/cm3 | 1400 Β°C (2550 Β°F) | Psi β 75000 , MPa β 515 | Psi β 30000 , MPa β 205 | 40 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | 321S31 | 08Π₯22Π5 | Z7CN18β09 | X6CrNiTi18-10 |
Contact Neeka tubes today for a best offer & competitive quotation Of Stainless Steel 321 Seamless Pipes
Please Call on +91 7700067892 or drop an E-Mail : sales@neekatubes.net
| Nominal size in Inch | Outside diameter in Inch | Outside diameter in MM | Wall thickness in Inch | Wall thickness in MM | Weight [lb/ft] | Weight [kg/m] |
|---|---|---|---|---|---|---|
| 1/4 Inch | 0.540 | 13.7 MM | 0.088 | 2.24 | 0.42 | 0.84 |
| 12 Inch | 12.750 | 323.8 MM | 0.406 | 10.31 | 53.52 | 79.73 |
| 1/2 Inch | 0.840 | 21.3 MM | 0.109 | 2.77 | 0.85 | 1.27 |
| 32 Inch | 32 | 813.0 MM | 0.688 | 17.48 | 230.08 | 342.91 |
| 2 1/2 Inch | 2.875 | 73.0 MM | 0.203 | 5.16 | 5.79 | 8.63 |
| 6 Inch | 6.625 | 168.3 MM | 0.280 | 7.11 | 18.97 | 28.26 |
| 20 Inch | 20 | 508.0 MM | 0.594 | 15.09 | 123.11 | 183.42 |
| 1/8 Inch | 0.405 | 10.3 MM | 0.068 | 1.73 | 0.24 | 0.37 |
| 3 Inch | 3.500 | 88.9 MM | 0.216 | 5.49 | 7.58 | 11.29 |
| 18 Inch | 18 | 457.0 MM | 0.562 | 14.27 | 104.67 | 155.80 |
| 3/4 Inch | 1.050 | 26.7 MM | 0.113 | 2.87 | 1.13 | 1.69 |
| 24 Inch | 24 | 610.0 MM | 0.688 | 17.48 | 171.29 | 255.41 |
| 3 1/2 Inch | 4.000 | 101.6 MM | 0.226 | 5.74 | 9.11 | 13.57 |
| 5 Inch | 5.563 | 141.3 MM | 0.258 | 6.55 | 14.62 | 21.77 |
| 1 1/4 Inch | 1.660 | 42.2 MM | 0.140 | 3.56 | 2.27 | 3.39 |
| 1 Inch | 1.315 | 33.4 MM | 0.133 | 3.38 | 1.68 | 2.50 |
| 1 1/2 Inch | 1.900 | 48.3 MM | 0.145 | 3.68 | 2.72 | 4.05 |
| 14 Inch | 14 | 355.6 MM | 0.375 | 11.13 | 54.57 | 94.55 |
| 2 Inch | 2.375 | 60.3 MM | 0.154 | 3.91 | 3.65 | 5.44 |
| 4 Inch | 4.500 | 114.3 MM | 0.237 | 6.02 | 10.79 | 16.07 |
| 10 Inch | 10.750 | 273.0 MM | 0.365 | 9.27 | 40.48 | 60.31 |
| 8 Inch | 8.625 | 219.1 MM | 0.322 | 8.18 | 28.55 | 42.55 |
| 16 Inch | 16 | 406.4 MM | 0.500 | 12.70 | 82.77 | 123.30 |
| Sizes | SCH 10 321 Grade Stainless Steel Pipe | O.D | |
| DIA | |||
| Inch | DN | Thickness | Millimetre (mm) |
| 1 Inch | DN 25 | 2.77 | 33.4 |
| 2 Inch | DN 50 | 2.77 | 60.3 |
| 3 Inch | DN 80 | 3.05 | 88.9 |
| 4 Inch | DN 100 | 3.05 | 114.3 |
| 5 Inch | DN 125 | 3.43 | 141.3 |
| 6 Inch | DN 150 | 3.43 | 168.3 |
| 8 Inch | DN 200 | 3.76 | 219.1 |
| 10 Inch | DN 250 | 4.19 | 273.1 |
| 11/2 Inch | DN 40 | 2.77 | 48.3 |
| 11/4 Inch | DN 32 | 2.77 | 24.2 |
| 12 Inch | DN 300 | 4.57 | 323.9 |
| 14 Inch | DN 350 | 6.35 | 355.6 |
| 16 Inch | DN 400 | 6.35 | 406.4 |
| 18 Inch | DN 450 | 6.35 | 457.2 |
| 21/2 Inch | DN 65 | 3.05 | 73 |
| 22 Inch | DN 550 | 6.35 | 558.8 |
| 24 Inch | DN 600 | 6.35 | 609.6 |
| 34 Inch | DN 850 | 7.92 | 863.6 |
| 31/2 Inch | DN 90 | 3.05 | 101.6 |
| 36 Inch | DN 900 | 7.92 | 914.4 |




Packing & Delivery
SS 321 seamless pipes are packaged in wooden cases, plastic bags, or secured with steel strips according to the customers’ specifications. The packaging protects the pipes from damage during shipping. Special packaging can also be arranged based on customer requirements.
We ensure safe handling, and timely delivery by dealing with prominent shipping firms that provide both domestic and international services. Customers are provided with tracking information for better convenience and transparency.
Inspection, Test Reports
Stainless Steel 321 Seamless Pipes come with complete quality assurance, including Mill Test Certificates, EN 10204 3.1, and NABL Approved Lab Reports. The Pipes undergo chemical and mechanical testing, PMI tests. And visual inspections to assure high quality. Additionally both destructive and non-destructive tests are conducted. Along with third-party inspection reports guaranteeing reliability and superior performance.







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