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Neeka Tubes is a reliable supplier of SS 304L Welded Pipes in India, providing top-notch piping solutions tailored for a variety of industrial applications. We specialize in manufacturing and supplying 304L Stainless Steel Welded Pipes, which are well-known for their outstanding corrosion resistance and excellent weldability. Being a low carbon variant of 304, 304L stainless steel reduces carbide precipitation making it perfect for welding tasks while maintaining its structural integrity. Our ASTM A312 TP304L Welded Pipes meet international standards like ASTM A312 and ASME SA312 guaranteeing reliable performance in a variety of settings such as the food and beverage, chemical processing and marine industries. We can quickly meet different needs because of our extensive selection of SS 304L Welded Pipe sizes, surface finishes and schedules including 304L Pipe Schedule 40. We guarantee on time delivery, necessary test certification and customized specification to satisfy your precise requirement.
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What Is ASTMβ―A312 TP304L Welded Pipe?
ASTM A312 TP304L welded pipe is a low-carbon stainless steel variant designed for clean, reliable welding without carbide precipitation. This SS 304L welded pipe works well in high-temperature and corrosive environments. Neeka tubes is a leading stainless steel welded pipe manufacturer that meets ASTM A312 standards. It is designated UNS S30403 and is manufactured using ERW stainless steel 304L pipe or fusion welding to ensure a uniform, long-lasting seam. No post-weld annealing is required, which saves time and money. These pipes are commonly used for food-grade piping, chemical plants, and plumbing systems. We provide a variety of finishes and wall thickness schedules to meet the needs of each project.
Benefits of Stainless Steel 304l Welded Pipe
SS 304L welded pipe offers a balance of durability, weldability, and more which makes it a top choice for many industries.
- Superior Corrosion Resistance – Even after multiple welding operations, the low carbon content prevents intergranular corrosion.
- Hygienic Flow – The smooth inner surface keeps liquids clean and is ideal for food-grade welded pipe systems.
- Easy Welding – Excellent weldability eliminates the need for post-weld heat treatment, saving both time and money.
- Chemical and Sanitary Compatibility – Handles mild chemicals and has sanitary applications in process, water, and plumbing systems.
- Cost-Effective Solution – More affordable than seamless pipes and fully compliant with ASTM A312 TP304L standards.
- Reliable Weld Strength – The ERW stainless steel 304L process produces consistent and strong weld joints ensuring a long service life.
304 vs 304L β Why Low-Carbon Matters for Welded Pipes
Choosing between 304 and 304L stainless steel frequently comes down to weldability and corrosion resistance near the weld.
- 304L contains β€0.03% carbon, significantly lower than 0.08% in 304.
- Lower carbon reduces sensitization and prevents carbide buildup during welding.
- No post-weld heat treatment is required for 304L welded pipe which saves time and money.
- Better corrosion resistance around welds, but the tensile strength is slightly lower.
- Best for piping systems with frequent welding, especially in low carbon stainless steel pipe designs.
- 304 suits non-welded structural jobs where higher strength matters more than weld performance
Most Common Types of Stainless Steel 304l Welded Pipe
SS 304l Welded Pipe
304l SS Round Pipe
SS 304l Welded Square Pipe
SS 304l Polished Pipe
SS 304l Schedule 40 Seamless Pipe
304l Stainless Steel Thin Wall Pipe
Stainless Steel 304l Custom Pipe
Stainless Steel 304l Cold Drawn Seamless Pipe
Stainless Steel 304l Welded Pipe Specifications
| 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 Pipe in Mumbai? Find Your Sizes and Thickness of SS Welded Pipes in Our Ready Stock.
Stainless Steel 304l Welded Pipe Chemical Composition
Stainless Steel 304L welded pipe chemical composition shows the balance of elements that give this grade its unique properties. Knowing these values helps to ensure that the material is appropriate for your intended environment and application.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 304L | 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 304l Welded Pipe
Mechanical properties of SS 304L welded pipe include details of strength, hardness, and elongation. This help confirm the pipe can handle the required pressure, stress, and temperature in service.
| 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 | ||||
| 304L | 515 | 205 | 40 | 92 | 201 |
Equivalent Grades For SS 304l Welded Pipe
Equivalent grades for SS 304L welded pipe list alternative international standards that match its composition and quality. This makes it easier to find compatible materials when sourcing or replacing pipes globally.
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| SS 304L | S30400 | 1.4301 | Z7CN18β09 | X5CrNi18-10 | SUS 304 | 304S31 | 08Π₯18Π10 |
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Stainless Steel 304l Welded Pipe Dimensions In MM
Stainless Steel 304L welded pipe dimensions in mm give exact outer diameters and lengths for accurate project planning. Having the right measurements ensures smooth installation and system compatibility.
| 1/8″ IPS(.405″O. D.) | 3 1/2″ IPS( 4.000″O. D.) |
|---|---|
| SCH 40, 80 | SCH 10, 40, 80, 160, XXH |
| 1/4″ IPS(.540″O. D.) | 4″ IPS(4.500″O. D.) |
| SCH 10, 40, 80 | SCH 10, 40, 80, 160, XXH |
| 3/8″ IPS(.675″O. D.) | 5″ IPS( 5.563″O. D.) |
| SCH 10, 40, 80 | SCH 10, 40, 80, 160, XXH |
| 1/2″ IPS(.840″O. D.) | 6″ IPS(6.625″O. D.) |
| SCH 5, 10, 40, 80, 160, XXH | SCH 5, 10, 40, 80, 120, 160, XXH |
| 3/4″ IPS(1.050″O. D.) | 8 β IPS(8.625″O. D.) |
| SCH 10, 40, 80, 160, XXH | SCH 5, 10, 40, 80, 120, 160, XXH |
| 1″ IPS:(1.315β²O. D.) | 10″ IPS(10.750″O. D.) |
| SCH 5, 10, 40, 80, 160, XXH | SCH 10, 20, 40, 80 (.500), TRUE 80(.500) |
| 1-1/4″ IPS(1.660″O. D.) | 12″ IPS(12.750″O. D.) |
| SCH 10, 40, 80, 160, XXH | SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500) |
| 1-1/2″ IPS(1.900″O. D.) | 14″ IPS(14.000″O. D.) |
| SCH 10, 40, 80, 160, XXH | SCH10 (.188), SCH40 (.375) |
| 2″ IPS(2.375″O. D.) | 16″ IPS(16.000″O. D.) |
| SCH 10, 40, 80, 160, XXH | SCH10(.188), SCH40(.375) |
| 2 1/2″ IPS(2.875″O. D.) | 18″ IPS (18.000″O. D.) |
| SCH 10, 40, 80, 160, XXH | SCH-40 (.375) |
| 3″ IPS( 3.500″O. D.) | Β |
| SCH 5, 10, 40, 80, 160, XXH | Β |
Thickness Chart of SS 304l Welded Pipe
Thickness chart of SS 304L welded pipe lists available wall thicknesses across different schedules. This helps pick the right pipe for strength, flow requirements, and long-term durability.
| Sizes | SCH 10 304 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 |
Heat & Corrosion Resistance of 304L Welded Pipes
SS 304L welded pipe offers strong resistance to oxidation and scaling at temperatures up to about 870Β°C. Its low carbon content prevents weld-zone sensitization. This preserves strength and the corrosion resistance of stainless steel 304L. This makes it dependable in chloride-rich, acidic, and damp conditions. As a heat resistant stainless steel pipe, it stays durable and stable under thermal and corrosive stress. ASTM A312 TP304L serves well in marine, chemical, food processing, and both indoor and outdoor industrial setups, earning its place as a trusted marine grade stainless steel pipe.
How SS 304 Seamless Pipes Are Manufactured
- Billet Selection: The procedure begin by selecting high-quality solid SS 304 billets. These raw bars serve as the foundation for the material which provide uniform strength, corrosion resistance and longevity.
- Heating: The billets are then heated in a furnace to high temperature. This softens the metal which allow it to be molded without cracking or losing uniformity.
- Piercing: A mandrel or piercing tool is driven through the heated billet to form a hollow shell. This stage represent the start of the pipe structure.
- Rolling & Sizing: The hollow shell is extended and rolled into pipe shape with rollers. The diameter and wall thickness are precisely adjusted to meet exact specifications.
- Annealing: Pipes undergo a heat treatment known as annealing, which increases ductility, toughness, and reduces tension accumulated during rolling.
- Pickling: An acid solution is used to clean the pipe surface. This removes scale, oxides, and contaminants from the pipe, resulting in a smooth, corrosion-resistant finish.
- Finishing: The pipes are straightened, cut to the appropriate lengths, and polished to ensure a clean, consistent look. Special finishes can be applied as needed.
- Testing & Marking: Each pipe go through quality tests, including dimensional checks and strength validation. Pipes are marked with grade and batch details and then packed securely for delivery.Β
Price per Kg for 304L Welded Pipe in India
304L welded pipe price per kg in India usually ranges between βΉ250 and βΉ350. The SS 304L welded pipe rate India varies depending on size, wall thickness and finish. Costs also shift with nickel and chromium prices in the global stainless steel market. Standards like ASTM A312 and EN 10204 3.1 certification have an impact on welded stainless steel pipe price. GST, transport, and Mill Test Certificates may affect the final SS 304L pipe cost 2025. For the most accurate or bulk pricing, contact us for current ASTM A312 TP304L price details.
Packaging & Delivery of SS 304L Welded Pipes β Domestic & International
SS 304L welded pipe packaging is designed to keep every order safe during handling and transport. Pipes are wrapped in bubble wrap, HDPE, or jute, depending on size and destination. ISPM-15 certified fumigated wooden crates or pallets provide additional protection during export. Each pipe has a tag with the size, grade, heat number, and order details. Markings follow ASTM and EN standards to ensure full traceability, with color coding and custom labels available for specific projects. ASTM A312 TP304L pipe delivery occurs by road, sea, or air, ensuring timely SS pipe shipment India.
Testing & Certification β Potable Water & Chemical Use
SS 304L welded pipes undergo strict testing to ensure safety and reliability. Every pipe passes hydrostatic tests, PMI test SS 304L pipe, ultrasonic (UT), eddy current (ET), and key mechanical checks like tensile and flattening. Results confirm chemical composition, wall thickness, and strength for demanding use. Each delivery includes an EN 10204 3.1 test certificate, and third-party inspection stainless pipe from SGS, TUV, or BV can be arranged. ASTM A312 TP304L pipe certification guarantees that the pipes meet standards for chemical handling and potable water systems.
Why Choose Neeka Tubes for SS 304L Welded Pipes ?
Neeka Tubes is a reliable 304L pipe supplier Mumbai, offering a wide range of ASTM A312 TP304L welded pipes in multiple sizes and wall thicknesses. Every order comes with in-house testing, including MTC (EN 10204 3.1), PMI, and third-party checks when needed. Timely delivery for Indian and international customers, with export-ready packaging. We offer competitive prices and clear documentation. As a reputable 304L stainless steel pipe supplier, we serve the petrochemical, food processing, and water treatment industries.
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Applications of SS 304L Welded Pipes
SS 304L welded pipes are used in multiple industries due to their unique features.
- Food and beverage processing for clean, safe transport of liquids and semi-liquids.
- Pharmaceutical piping systems where low carbon and non-reactivity maintain product purity.
- Plumbing and water supply lines in homes, commercial buildings, and industrial facilities.
- Chemical handling systems that carry mild acids and corrosive fluids with safety.
- Architectural structures like railings, trims, and decorative uses need stainless steel welded pipe.
- HVAC and exhaust systems benefiting from the pipeβs weldability, strength, and longevity.
FAQs β 304L Welded Pipes
Are Mill Test Certificates (MTC) provided with SS 304L welded pipes?
Yes, all SS 304L welded pipes come with an EN 10204 3.1 Mill Test Certificate showing chemical and mechanical test results.
How do SS 304L welded pipes compare to seamless pipes?
Welded pipes are more cost-effective, offer consistent wall thickness, and suit most applications, while seamless pipes handle higher pressure.
Can SS 304L welded pipes be used in high-temperature systems?
Yes, they can withstand oxidation and scaling up to about 870Β°C in continuous service.
How do I choose between SS 304, 304L, and 316 welded pipes?
Pick 304 for strength, 304L for better weldability and low-carbon corrosion resistance, and 316 for superior chemical resistance.