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Neeka Tubes, a reliable SS 304 pipe manufacturer in India, provides high-quality welded pipes designed for strength and dependability. Our pipe is made of 18/8 austenitic stainless steel, which ensures durability and corrosion resistance. We offer ASTM A312 SS 304 welded pipes in round, square, and rectangular shapes to meet the requirements of the chemical, pharmaceutical, food processing, and water treatment industries. These pipes have a smooth finish, precise dimensions, and a strong welded construction, making them ideal for oil and gas systems, structural projects, and heat exchangers. With custom sizes and affordable SS 304 welded pipe prices, we guarantee the perfect fit for every project.
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What Is ASTM A312 TP304 Welded Pipe?
ASTM A312 TP304 welded pipe is made of grade 304, a chromiumβnickel austenitic steel known as UNS S30400. It is manufactured by Electric Resistance Welding (ERW), or HighβFrequency Welding (HFW) methods for consistent joints. This pipe complies with ASTM A312 / ASME SA312 standards, ensuring consistent quality and performance.Β It has excellent corrosion resistance, high strength, and cost advantage over seamless pipes. This SS 304 welded pipe comes in longer lengths and is designed for low to medium pressure systems. This makes it a practical choice for many industrial applications.
Key Features of Stainless Steel 304 Welded Pipe
Our SS 304 welded pipe features make it a trusted choice for industrial piping systems.
- Optimized Flow Performance
Smooth inner surface improves flow and lowers scaling in liquid and gas pipelines.
- Superior Corrosion Resistance
Strong corrosion resistance in water, air, and other oxidizing environments.
- Excellent Weldability
TIG, MIG, or stick welding methods can be used to easily weld and shape the material.
- High Strength and Flexibility
Tensile strength of around 515 MPa ensures durability under pressure.
- Variety of Finishes Available
Available in pickled, annealed, and other 304 polished pipe finishes to meet a variety of project requirements.
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SS 304 vs SS 304L vs SS 316 β Welded Pipe Grade Comparison
The 300 series stainless steel welded pipes include SS 304, SS 304L, and SS 316βeach designed for different needs.
- SS 304 welded pipe: Standard grade contains 18% chromium and 8% nickel. It has excellent corrosion resistance, strength, and weldability for general piping applications.
- SS 304L welded pipe: Lowβcarbon version of 304. It prevents intergranular corrosion during heavy welding. This makes it ideal for sections that need extensive fabrication.
- SS 316 welded pipe: It contains molybdenum, which makes it more resistant to pitting and chlorides. It works well in marine, chemical, and saltwater environments.
- Mechanical properties: All three grades have similar strength and heat tolerance. 304L offers easier welding, while 316 provides extra corrosion protection.
- Application: SS 304 for general use, stainless steel 304l welded pipe for welded structures, and 316 where high chloride or salt exposure exists.
- Cost factor: SS 316 welded pipe is more expensive than 304 or 304L due to added alloying elements.
Most Common Types of Stainless Steel 304 Welded Pipe
SS 304 Welded Pipe
304 SS Round Pipe
SS 304 Welded Square Pipe
SS 304 Polished Pipe
SS 304 Schedule 40 Seamless Pipe
304 Stainless Steel Thin Wall Pipe
Stainless Steel 304 Custom Pipe
Stainless Steel 304 Cold Drawn Seamless Pipe
Stainless Steel 304 Welded Pipe Specifications
Stainless Steel 304 welded pipe specifications include size, standards, thickness, and length details, making selection quick and accurate.
| Specifications | ASTM A312 / ASME SA312 |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24β³ NB available Ex-stock, OD Size available Ex-stock |
| Thickness | 0.3mm β 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Size | 1/2β³ NB β 24β³ NB |
| Type | Welded |
| Form | Round Pipes, Square Pipes, Rectangular Pipes |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Threaded |
Looking For Fastest Delivery of Stainless Steel Welded Pipe in Mumbai? Find Your Sizes and Thickness of SS Welded Pipes in Our Ready Stock.
Stainless Steel 304 Welded Pipe Chemical Composition
The chemical composition of stainless steel 304 welded pipe specifies the percentages of chromium, nickel, and other elements used to ensure corrosion resistance and durability.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 304 | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 18.0-20.0 | β | 8.0-10.5 | 0.10 |
Mechanical Properties of SS 304 Welded Pipe
The mechanical properties of SS 304 welded pipes highlight strength, hardness, and elongation, allowing you to assess performance under pressure and stress.
| 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 | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
Equivalent Grades For UNS S30400 Welded Pipes
SS 304 welded pipe equivalent grades list international standards, UNS designation, DIN number for material clarity across regions.
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| SS 304 | S30400 | 1.4301 | Z7CN18β09 | X5CrNi18-10 | SUS 304 | 304S31 | 08Π₯18Π10 |
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Dimension of SS 304 Welded Pipe
Stainless Steel 304 welded pipe dimensions outline available sizes and tolerances, allowing you to select the best fit for your system.
| 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] |
|---|---|---|---|---|---|---|
| 1/8 Inch | 0.405 | 10.3 MM | 0.068 | 1.73 | 0.24 | 0.37 |
| 1/4 Inch | 0.540 | 13.7 MM | 0.088 | 2.24 | 0.42 | 0.84 |
| 1/2 Inch | 0.840 | 21.3 MM | 0.109 | 2.77 | 0.85 | 1.27 |
| 3/4 Inch | 1.050 | 26.7 MM | 0.113 | 2.87 | 1.13 | 1.69 |
| 1 Inch | 1.315 | 33.4 MM | 0.133 | 3.38 | 1.68 | 2.50 |
| 1 1/4 Inch | 1.660 | 42.2 MM | 0.140 | 3.56 | 2.27 | 3.39 |
| 1 1/2 Inch | 1.900 | 48.3 MM | 0.145 | 3.68 | 2.72 | 4.05 |
| 2 Inch | 2.375 | 60.3 MM | 0.154 | 3.91 | 3.65 | 5.44 |
| 2 1/2 Inch | 2.875 | 73.0 MM | 0.203 | 5.16 | 5.79 | 8.63 |
| 3 Inch | 3.500 | 88.9 MM | 0.216 | 5.49 | 7.58 | 11.29 |
| 3 1/2 Inch | 4.000 | 101.6 MM | 0.226 | 5.74 | 9.11 | 13.57 |
| 4 Inch | 4.500 | 114.3 MM | 0.237 | 6.02 | 10.79 | 16.07 |
| 5 Inch | 5.563 | 141.3 MM | 0.258 | 6.55 | 14.62 | 21.77 |
| 6 Inch | 6.625 | 168.3 MM | 0.280 | 7.11 | 18.97 | 28.26 |
| 8 Inch | 8.625 | 219.1 MM | 0.322 | 8.18 | 28.55 | 42.55 |
| 10 Inch | 10.750 | 273.0 MM | 0.365 | 9.27 | 40.48 | 60.31 |
| 12 Inch | 12.750 | 323.8 MM | 0.406 | 10.31 | 53.52 | 79.73 |
| 14 Inch | 14 | 355.6 MM | 0.375 | 11.13 | 54.57 | 94.55 |
| 16 Inch | 16 | 406.4 MM | 0.500 | 12.70 | 82.77 | 123.30 |
| 18 Inch | 18 | 457.0 MM | 0.562 | 14.27 | 104.67 | 155.80 |
| 20 Inch | 20 | 508.0 MM | 0.594 | 15.09 | 123.11 | 183.42 |
| 24 Inch | 24 | 610.0 MM | 0.688 | 17.48 | 171.29 | 255.41 |
| 32 Inch | 32 | 813.0 MM | 0.688 | 17.48 | 230.08 | 342.91 |
Thickness Chart of SS 304 Welded Pipe
SS 304 welded pipe thickness chart provides wall thickness options for different pressure ratings and durability needs.
| Nominal Pipe Size | Outside Diameter | Schedule 5 S | Schedule 10 S | Schedule 20 S | Schedule 40 S | Schedule 80 S | Schedule 160 S | XXS | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | inch | mm | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) | WT mm | WEIGHT (KGM) |
| 3 | 1/8 | 10.3 | 1.2 | 0.20 | 1.24 | 0.28 | 1.5 | 0.33 | 1.73 | 0.37 | 2.41 | 0.47 | – | – | – | – |
| 6 | 1/4 | 13.7 | 1.2 | 0.37 | 1.65 | 0.49 | 2.00 | 0.58 | 2.24 | 0.630 | 3.02 | 0.80 | – | – | – | – |
| 10 | 3/8 | 17.1 | 1.2 | 0.47 | 1.65 | 0.63 | 2.00 | 0.74 | 2.31 | 0.840 | 3.20 | 1.10 | – | – | – | – |
| 15 | 1/2 | 21.3 | 1.65 | 0.80 | 2.11 | 1.00 | 2.30 | 1.07 | 2.77 | 1.27 | 3.73 | 1.62 | 4.75 | 1.94 | 7.47 | 2.55 |
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 2.11 | 1.28 | 2.55 | 1.52 | 2.87 | 1.69 | 3.91 | 2.20 | 5.56 | 2.90 | 7.82 | 3.64 |
| 25 | 1 | 33.4 | 1.65 | 1.30 | 2.77 | 2.09 | 2.55 | 1.94 | 3.38 | 2.50 | 4.55 | 3.24 | 6.35 | 4.24 | 9.09 | 5.45 |
| 32 | 1.1/4 | 42.2 | 1.65 | 1.65 | 2.77 | 2.70 | 3.00 | 2.90 | 3.56 | 3.39 | 4.85 | 4.47 | 6.35 | 5.61 | 9.70 | 7.77 |
| 40 | 1.1/2 | 48.3 | 1.65 | 1.91 | 2.77 | 3.11 | 3.00 | 3.55 | 3.68 | 4.05 | 5.08 | 5.41 | 7.14 | 7.25 | 11.1 | 10.18 |
| 50 | 2 | 60.3 | 1.65 | 2.40 | 2.77 | 3.93 | 3.00 | 4.24 | 3.91 | 5.44 | 5.54 | 7.48 | 8.74 | 11.11 | 11.07 | 13.44 |
| 65 | 2.1/2 | 73.0 | 2.11 | 3.69 | 3.05 | 5.26 | 4.00 | 6.81 | 5.16 | 8.63 | 7.01 | 11.41 | 9.53 | 14.91 | 14.02 | 20.39 |
| 80 | 3 | 88.9 | 2.11 | 4.51 | 3.05 | 6.45 | 4.00 | 8.37 | 5.49 | 11.29 | 7.62 | 15.27 | 11.1 | 21.30 | 15.24 | 27.68 |
| 100 | 4 | 114.3 | 2.11 | 5.84 | 3.05 | 8.36 | 4.50 | 12.18 | 6.02 | 16.07 | 8.56 | 22.32 | 13.49 | 33.54 | 17.12 | 41.03 |
| 125 | 5 | 141.3 | 2.77 | 9.47 | 3.40 | 11.57 | 5.00 | 16.80 | 6.55 | 21.8 | 9.53 | 30.97 | 15.88 | 49.11 | 19.05 | 57.43 |
| 150 | 6 | 168.3 | 2.77 | 11.32 | 3.40 | 13.84 | 6.35 | 25.36 | 7.11 | 28.26 | 10.97 | 42.56 | 18.25 | 67.53 | 21.95 | 79.22 |
| 200 | 8 | 219.1 | 2.77 | 14.79 | 3.76 | 19.96 | 6.35 | 33.31 | 8.18 | 42.55 | 12.7 | 64.64 | 23.01 | 111.27 | 22.23 | 107.92 |
| 250 | 10 | 273.1 | 3.40 | 22.63 | 4.19 | 27.78 | 6.35 | 41.77 | 9.27 | 60.31 | 12.7 | 96.01 | 28.58 | 172.33 | 25.40 | 155.15 |
| 300 | 12 | 323.8 | 3.96 | 31.25 | 4.57 | 36.00 | 6.35 | 49.7 | 9.53 | 73.88 | 12.7 | 132.05 | 33.32 | 238.76 | 25.40 | 186.97 |
| 350 | 14 | 355.6 | 3.96 | 34.36 | 4.78 | 41.3 | 7.92 | 67.80 | 11.13 | 94.59 | ||||||
Heat and Corrosion Resistance of SS 304 Welded Pipe
SS 304 welded pipe offers strong heat and corrosion resistance for demanding environments. Its chromium and nickel content forms a thin oxide layer that protects the surface. This layer repairs itself when scratched, helping the pipe resist rust, acids, and chemical attack. The pipe handles oxidation and scaling up to about 870β―Β°C without losing strength. It performs reliably indoors and outdoors, even in areas with moisture, heat, or corrosive chemicals. These qualities make ASTM A312 TP304 welded pipes suitable where high temperature and corrosion protection are crucial.
How SS 304 Welded Pipes Are Manufactured
The ERW (Electric Resistance Welding) method is widely used in the production of SS 304 welded pipes because it produces clean, strong, and efficient welds.
- Raw material slitting: Stainless steel coils are slit into precise widths for various pipe sizes.
- Forming into pipe shape: Slit strips are shaped into cylindrical pipes with rollers.
- High-frequency welding: Edges heat up and fuse without filler metal, creating a solid and seamless joint.
- Bead removal: Inner and outer weld beads are removed by scarfing or grinding for a smooth finish.
- Annealing process: Heat treatment improves ductility and increases corrosion resistance.
- Sizing and straightening: Pipes are adjusted to meet dimensional requirements and maintain straight alignment.
- Cutting to length: Pipes are cut to standard or custom lengths as specified.
- Surface finishing: Pickling or polishing reduces scale and improves the quality of the pipe surface.
- Final testing and inspection: Non-destructive and dimensional tests confirm strength, quality, and reliability.
This step-by-step SS 304 pipe forming and welding process ensures that the pipes are durable enough for demanding applications.
SS 304 Welded Pipe Price per Kg in India (βΉ/kg)
SS 304 welded pipe price in India usually ranges between βΉ200 and βΉ350 per kg, depending on outer diameter, wall thickness, and schedule. Pickled and polished finishes have higher prices than standard mill finishes. Pipes with larger diameters or thicker walls cost more because of the additional material used. Nickel price fluctuations and the choice between Indian or imported coils also impact the stainless steel pipe cost India. Buyers placing bulk or long-term orders often get better welded pipe price per kg offers, and tracking the ASTM A312 welded pipe rate helps plan purchases effectively.
Packaging & Delivery of SS 304 Welded Pipes β Export & Domestic
SS 304 welded pipe export packaging is intended to protect the pipes during handling and transportation. Bubble wrap protects against scratches and dirt, while plastic end caps keep edges safe. Pipes are bundled with steel strips or packed in sturdy wooden boxes and ISPM-15-compliant crates for long-distance transport. Each package contains clear project labels and international markings for easy identification. Secure wooden box pipe shipment ensures safe delivery throughout India and to export destinations.Β
Why Choose Neeka Tubes for SS 304 Welded Pipes
Choosing the right SS 304 pipe supplier in India ensures quality, value, and dependable service. Neeka Tubes provides all three.
- Large stock of ASTM A312 TP304 welded pipes for quick delivery.
- Competitive pricing, consistent quality, and discounts for larger orders.
- ISO-compliant quality checks, third-party inspection assistance, and complete certification.
- Quick dispatch with ready stock and custom cut-length solutions.
- Expert guidance from a responsive support team for technical and order queries.
- Trusted TP304 welded pipe exporter with global delivery experience and secure logistics.
As a reliable stainless steel pipe manufacturer, we ensure that each order is quality tested and meets project specifications.
Testing & Certifications for SS 304 Welded Pipe
SS 304 welded pipes go through tests to ensure safety and consistent quality. Each pipe undergoes hydrostatic pressure testing to ensure it can withstand working pressure without leaking. Positive Material Identification (PMI) determines the chemical composition, whereas ultrasonic and other non-destructive tests (NDT) detect any hidden flaws. Visual and dimensional inspections ensure smooth surfaces, accurate sizes, and proper wall thickness. Every batch includes an EN 10204 3.1/3.2 stainless steel pipe certification, and MTC containing ASTM A312 TP304 SS 304 pipe test results. Third-party inspections are available for additional quality assurance.
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Applications of SS 304 Welded Pipes Across Industries
SS 304 welded pipes are known for durability, corrosion resistance, and easy fabrication which make them useful in many fields:
- Chemical processing: Carry acids, alkalis, and chemical fluids without corrosion.
- Food and beverage plants: Maintain hygiene in processing, storage, and distribution lines.
- Pharmaceutical systems: Provide clean piping for manufacturing and purified water lines.
- Oil and gas sector: Handle low- to medium-pressure flow and structural piping needs.
- Water treatment plants: Move treated water and wastewater efficiently.
- Construction and architecture: Offer strength and a clean finish for visible structures.
- Heat exchangers and condensers: Support effective heat transfer in industrial systems.
FAQs β SS 304 Welded Pipes
What is the difference between SS 304 seamless and welded pipes?
SS 304 seamless pipes have no weld seams, whereas welded pipes are made by joining steel strips, resulting in lower costs and greater size availability.
Are SS 304 welded pipes suitable for outdoor use?
Yes, they resist rust and corrosion, making them ideal for outdoor and exposed environments.
What industries most commonly use SS 304 welded pipes?
304 stainless steel welded pipes are used in the chemical, food processing, pharmaceutical, water treatment, and oil and gas industries.
Can SS 304 welded pipes handle high temperatures?
They are resistant to oxidation up to 870β―Β°C, making them ideal for high temperatures.
How is the weld seam of SS 304 welded pipe treated during production?
The seam is scarfed or ground smooth, then heat-treated to restore corrosion resistance.
Are SS 304 welded pipes compatible with drinking water systems?
Yes, their corrosion resistance and hygienic properties make them appropriate for potable water systems.
What sizes and thicknesses are available in SS 304 welded pipes?
They come in a variety of diameters, wall thicknesses, and custom lengths as needed.
Can SS 304 welded pipes be used in marine environments?
Yes, they can withstand moisture and salt exposure, though SS 316 may be preferable for highly aggressive seawater conditions.