Stainless Steel 304 / 304L Pipes Supplier & Manufacturer
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What Are SS 304 / 304L Pipes?
SS 304 and 304L are austenitic stainless steel pipe grades carrying 18–20% chromium and 8–10.5% nickel under UNS S30400 and S30403, respectively. The L variant limits carbon to 0.03% maximum, preventing the chromium carbide precipitation at weld heat-affected zones that causes intergranular corrosion in higher-carbon 304 when the pipe is welded without post-weld heat treatment. That distinction matters in fabricated assemblies: 304L welds cleanly in the field without annealing, making it the preferred specification for any piping system that will be site-welded into a process loop.
Both grades conform to ASTM A312 (seamless and welded) and ASTM A213 (seamless mechanical tubing). Available forms include seamless pipe, ERW (electric resistance welded) pipe, and EFW (electric fusion welded) large-bore pipe, in schedules from Schedule 5S through Schedule XXS.
Benefits of SS 304/304L Pipes
Stainless Steel 304 & 304L Pipes are easy to fabricate, durable and performance-oriented for a wide range of industries. These materials are well known for their corrosion resistance, ability to keep a clean surface and capacity to resist high temperatures without losing strength or shape.
- Very good corrosion resistance in acidic, chemical and humid situations
- The stainless steel 304L offers good weldability because of the decreased carbon percentage.
- Durability in long-term use in high temperature conditions
- Always maintains a clean, non-reactive surface for use in sanitary and hygienic settings
- Easy compatibility with bending, shaping and machining operations
- Less effort needed for maintenance even throughout long service durations
- Less costly than pipe manufactured of grade 316 and with balanced performance Used in the oil, pharmaceutical, marine and food industries
- Stainless steel pipes are a good choice for systems that require a high level of performance.
Stainless Steel 316/316L Pipes are widely chosen for their excellent weldability, affordable cost, and strong corrosion resistance in mild to moderate environments. While Stainless Steel 904L Pipes offers better protection in chloride-rich conditions due to its molybdenum content, it’s also more expensive. Stainless Steel 321 Pipes includes titanium for better stability at high temperatures but is less weld-friendly than 304L. Compare to Stainless Steel 310 Pipes, Duplex Steel 2205 Pipes provides much higher strength and superior corrosion resistance in tough environments but requires skilled fabrication and comes at a premium. Selection often depends on budget, exposure conditions, stress levels, and service temperature. For balanced performance and cost, SS 304/304L remains a reliable, all-purpose option.
Stainless Steel 304/304L Pipe Specifications
Choosing the correct specifications is key to ensuring performance, safety, and compatibility in any system. SS 304/304L pipes come in various grades, sizes, wall thicknesses, and lengths, built to meet global standards. They are available in seamless, welded, or ERW forms with plain, beveled, or threaded ends to suit different applications.
Seamless Pipe OD : 1/8 -12" NPS
Welded Pipe OD : 6.35 to 114.3 mm
EFW Pipe Size : 6″ NB – 24″ NB
ASTM A312, A358 / ASME SA312, SA358
UNS S30400, WNR 1.4301
Seamless, ERW, Welded, Fabricated
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random & Cut Length.
Plain End, Beveled End, Treaded
SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS
No. 2B - Mill finish/ Matte finish, No.8 - Mirror finish, No. 4 - Brushed finish, Bright, Annealing, Polished, Mirror
This specification range ensures that ASTM A312 stainless steel pipe can be tailored to suit pressure ratings, space limits, and end-use conditions in various industrial systems.
Stainless Steel 304/304L Pipes Types
Manufacturing Types
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Seamless PipeMade without a weld seam using hot rolling or extrusion.
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Welded PipeFormed by welding stainless steel strips or plates; often used for longer lengths.
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ERW PipeProduced by high-frequency welding of cold-formed steel coil.
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EFW PipeMade by fusion welding using electric current, usually for larger diameters.
Pipe Forms
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Round PipeStandard cylindrical shape for general piping systems.
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Square PipeEqual sides, used where flat edges or uniform alignment are needed.
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Rectangular PipeFlat-surfaced, suitable for design-specific or structural layouts.
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Hydraulic PipeManufactured with tight tolerances for high-pressure hydraulic systems.
These types of SS 304 pipe cover a wide range of technical and structural needs, offering flexibility in both design and function.
Contact us today to discuss how Stainless Steel 304/304L Pipes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
Understanding the chemical composition of stainless steel 304 pipes and stainless steel 304L pipe is essential for choosing the right grade for corrosion resistance, strength, and welding. Both meet ASTM A312 standards, with similar chromium and nickel content. The key difference is the lower carbon in 304L (≤ 0.035%), which improves weldability.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 11 | – |
| SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18 – 20 | – | 8 – 13 | – |
These values define the SS 304 and SS 304L chemical composition, directly impacting corrosion performance, structural reliability, and how the material behaves during welding or fabrication.
SS 304 pipes offer higher strength (515 MPa tensile, 205 MPa yield), ideal for load-bearing use. SS 304L, with lower strength (485 MPa tensile, 170 MPa yield), provides better weldability due to low carbon. Both grades ensure 40% elongation and ≤92 HRB hardness for good formability and machinability.
| Grade | Density | Melting Point | Tensilee Strength | Yield Strength (0.2%Offset) | Elongation |
| SS 304/304L | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 40 % |
These mechanical benchmarks guide selection for safe, long-lasting piping systems.
Knowing the weight of SS 304/304L pipes is important for accurate planning, budgeting, and load management. It impacts shipping costs, handling, and structural safety across all project scales. Pipe weight is calculated using outer diameter (OD), wall thickness, and the density of stainless steel (7.93 g/cm³). While seamless and welded pipes of the same stainless steel 304 pipe sizes are usually similar in weight, minor differences may occur due to wall thickness tolerances or weld seams.
Below is a sample SS 304/304L pipe weight chart:
| Nominal Bore | INCH | Outside Diameter (mm) | Sch-5S | Sch-10S | Sch-40S | Sch-80S | Sch-160S | Sch-XXS | ||||||
| Wt (mm) | Weight (Kg/mt) | Wt (mm) | Weight (Kg/mt) | Wt (mm) | Weight (Kg/mt) | Wt (mm) | Weight (Kg/mt) | Wt (mm) | Weight (Kg/mt) | Wt (mm) | Weight (Kg/mt) | |||
| 3 | 1/8 | 10.3 | 1.24 | 0.276 | 1.24 | 0.28 | 1.73 | 0.37 | 2.41 | 0.47 | – | – | – | – |
| 6 | 1/4 | 13.7 | 1.24 | 0.390 | 1.65 | 0.49 | 2.24 | 0.631 | 3.02 | 0.80 | – | – | – | – |
| 10 | 3/8 | 17.1 | 1.24 | 0.490 | 1.65 | 0.63 | 2.31 | 0.845 | 3.20 | 1.10 | – | – | – | – |
| 15 | 1/2 | 21.3 | 1.65 | 0.800 | 2.11 | 1.00 | 2.77 | 1.27 | 3.02 | 1.50 | 4.75 | 1.94 | 7.47 | 2.55 |
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 2.11 | 1.28 | 2.87 | 1.68 | 3.91 | 2.20 | 5.54 | 2.89 | 7.82 | 3.35 |
| 25 | 1 | 33.4 | 1.65 | 1.30 | 2.77 | 2.09 | 3.38 | 2.60 | 4.55 | 3.42 | 6.35 | 5.04 | 8.56 | 5.46 |
| 32 | 1 1/4 | 42.2 | 1.65 | 1.65 | 2.77 | 2.70 | 3.56 | 3.38 | 4.85 | 4.47 | 6.35 | 6.51 | 9.70 | 7.77 |
| 40 | 1 1/2 | 48.3 | 1.65 | 1.91 | 2.77 | 3.11 | 3.68 | 4.05 | 5.08 | 5.41 | 7.14 | 7.25 | 10.16 | 9.54 |
| 50 | 2 | 60.3 | 1.65 | 2.40 | 2.77 | 3.90 | 3.91 | 5.40 | 5.54 | 7.17 | 8.74 | 9.82 | 11.07 | 13.00 |
| 65 | 2 1/2 | 73.0 | 1.65 | 2.93 | 3.05 | 5.27 | 5.16 | 7.36 | 7.01 | 10.20 | 9.53 | 13.50 | 15.88 | 18.50 |
| 80 | 3 | 88.9 | 1.65 | 3.60 | 3.05 | 6.54 | 5.49 | 10.03 | 7.62 | 13.90 | 11.13 | 20.40 | 19.05 | 22.20 |
| 90 | 3 1/2 | 101.6 | 1.65 | 4.13 | 3.05 | 7.50 | 5.74 | 11.55 | 8.08 | 16.00 | – | – | 19.05 | 25.00 |
| 100 | 4 | 114.3 | 1.65 | 4.65 | 3.05 | 8.45 | 6.02 | 13.00 | 8.56 | 18.00 | 13.49 | 28.50 | 22.23 | 31.00 |
| 125 | 5 | 141.3 | 1.65 | 5.79 | 3.40 | 11.70 | 6.55 | 17.10 | 9.53 | 24.00 | 15.88 | 37.40 | 25.40 | 40.00 |
| 150 | 6 | 168.3 | 1.65 | 6.91 | 3.40 | 14.00 | 7.11 | 20.60 | 10.97 | 30.00 | 18.26 | 47.50 | 28.58 | 50.20 |
These values may vary slightly depending on manufacturing method (seamless vs welded). For more comprehensive data across stainless steel pipes sizes, detailed weight tables are available in technical datasheets.
Maintaining tight dimensional tolerances in SS 304/304L pipes is key to ensuring a proper fit, leak-free welding, and reliable performance across pressure systems. Parameters like outer diameter (OD), wall thickness, ovality, straightness, and cut length must stay within defined limits to meet design intent and safety margins.
At Midland Alloys Inc., tolerances strictly follow ASTM A312 and A249 dimensional standards. These allow minor variations between seamless pipe tolerances and welded versions due to differences in forming processes. Still, each 304L stainless pipe specification is checked under our in-house quality system for consistency.
We prioritize stainless steel pipe dimensional accuracy throughout production. Every stainless steel 304 pipe dimension is verified before dispatch using calibrated tools, ensuring customers receive pipes that meet industry and application requirements.
Surface finishes on SS 304/304L pipes play a key role in performance, especially where hygiene, corrosion protection, or appearance matters. The finish can influence how the pipe resists oxidation, how easy it is to clean, and how well it prepares for welding—crucial in sectors like food, pharma, architecture, and chemical processing.
A surface finish is the result of mechanical polishing or chemical treatment applied to the pipe’s exterior. Common finishes include Mill Finish (No. 1), which comes straight from hot rolling and suits structural or high-temperature uses. Bright Annealed (BA) and Matte Finish (No. 4) are common in sanitary or architectural work due to their smooth, clean look. Mirror Finish (No. 8) offers a reflective surface used in cleanrooms, decorative panels, and high-purity environments. Polished options such as 180, 240, or 320 grit are selected based on the desired texture and cleaning ease. All finishes follow ASTM A480 standards for consistency and reliability across stainless steel pipe applications.
Understanding the physical and thermal properties of SS 304 and 304L pipes helps engineers design systems that handle heat, pressure, and structural loads accurately.
The density of both grades is about 7.93 g/cm³, making it useful for calculating pipe weight in stress or load analysis. Their melting point ranges between 1400–1450 °C, allowing safe use in high-temperature environments. Thermal conductivity, measured at around 16.2 W/m·K at 100°C, helps in sizing process piping and heat exchangers. The thermal expansion rate stands at about 17.2 × 10⁻⁶/°C from 0 to 100°C, which designers consider to avoid misalignment due to pipe expansion. These values apply equally to SS 304 and SS 304L, with minimal difference, and follow ASTM A480 and EN standards.
Stainless Steel Pipe Grades We Offer
Stainless Steel 304 Pipe Schedule
Pipe schedule indicates wall thickness. Common types like SCH 10, 40, 80 define pressure and flow capacity.
| NB | OD | SCH XXS | SCH 80S | SCH 5S | SCH 160S | SCH 10S | SCH 40S | |||||||
| mm | in. | mm | WT (mm) | Weight (kg/m) | WT (mm) | Weight (kg/m) | Weight (kg/m) | WT (mm) | Weight (kg/m) | WT (mm) | WT (mm) | Weight (kg/m) | WT (mm) | Weight (kg/m) |
| 10 | 3/8 | 17.1 | – | – | 3.20 | 1.10 | 0.490 | 1.24 | – | – | 1.65 | 0.63 | 2.31 | 0.845 |
| 25 | 1 | 33.4 | 9.09 | 5.45 | 4.55 | 3.24 | 1.30 | 1.65 | 4.24 | 6.35 | 2.77 | 2.09 | 3.38 | 2.50 |
| 150 | 6 | 168.3 | 21.95 | 79.22 | 10.97 | 42.7 | 11.32 | 2.77 | 67.56 | 18.2 | 3.40 | 13.84 | 7.11 | 28.3 |
| 15 | 1/2 | 21.3 | 7.47 | 2.55 | 3.75 | 1.62 | 0.800 | 1.65 | 1.94 | 4.75 | 2.11 | 1.00 | 2.77 | 1.27 |
| 40 | 1 1/2 | 48.3 | 10.16 | 9.54 | 5.08 | 5.41 | 1.91 | 1.65 | 7.25 | 7.14 | 2.77 | 3.11 | 3.68 | 4.05 |
| 32 | 1 1/4 | 42.2 | 9.70 | 7.77 | 4.85 | 4.47 | 1.65 | 1.65 | 5.61 | 6.35 | 2.77 | 2.70 | 3.56 | 3.38 |
| 50 | 2 | 60.3 | 11.07 | 13.44 | 5.54 | 7.48 | 2.40 | 1.65 | 11.1 | 8.74 | 2.77 | 3.93 | 3.91 | 5.44 |
| 600 | 24 | 609.6 | – | – | 30.96 | 442.08 | 82.47 | 5.54 | 808.22 | 59.54 | 6.35 | 94.45 | 17.48 | 255.41 |
| 65 | 2 1/2 | 73.0 | 14.2 | 20.39 | 7.01 | 11.4 | 3.69 | 2.11 | 14.9 | 9.53 | 3.05 | 5.26 | 5.16 | 8.63 |
| 80 | 3 | 88.9 | 15.24 | 27.65 | 7.62 | 15.2 | 4.51 | 2.11 | 21.3 | 11.1 | 3.05 | 6.45 | 5.49 | 11.30 |
| 300 | 12 | 323.9 | 25.40 | 186.97 | 12.7 | 132.0 | 31.25 | 3.96 | 238.76 | 33.32 | 4.57 | 36.00 | 9.52 | 73.88 |
| 3 | 1/8 | 10.3 | – | – | 2.41 | 0.47 | 0.276 | 1.24 | – | – | 1.24 | 0.28 | 1.73 | 0.37 |
| 100 | 4 | 114.3 | 17.12 | 41.03 | 8.56 | 22.3 | 5.84 | 2.11 | 33.54 | 13.49 | 3.05 | 8.36 | 6.02 | 16.07 |
| 125 | 5 | 141.3 | 19.05 | 57.43 | 9.53 | 31.97 | 9.47 | 2.77 | 49.11 | 15.88 | 3.40 | 11.57 | 6.55 | 21.8 |
| 250 | 10 | 273.1 | 25.40 | 155.15 | 12.7 | 96.0 | 22.63 | 3.40 | 172.4 | 28.6 | 4.19 | 27.78 | 9.27 | 60.5 |
| 200 | 8 | 219.1 | 22.23 | 107.8 | 12.7 | 64.6 | 14.79 | 2.77 | 111.2 | 23.0 | 3.76 | 19.96 | 8.18 | 42.6 |
| 350 | 14 | 355.6 | – | – | 19.05 | 158.08 | 34.36 | 3.96 | 281.70 | 35.71 | 4.78 | 41.3 | 11.13 | 94.59 |
| 6 | 1/4 | 13.7 | – | – | 3.02 | 0.80 | 0.390 | 1.24 | – | – | 1.65 | 0.49 | 2.24 | 0.631 |
| 400 | 16 | 406.4 | – | – | 21.41 | 203.33 | 41.56 | 4.19 | 365.11 | 40.46 | 4.78 | 47.29 | 12.7 | 123.30 |
| 20 | 3/4 | 26.7 | 7.82 | 3.63 | 3.91 | 2.20 | 1.03 | 1.65 | 2.89 | 5.54 | 2.11 | 1.28 | 2.87 | 1.68 |
| 500 | 20 | 508.0 | – | – | 26.19 | 311.2 | 59.25 | 4.78 | 564.68 | 49.99 | 5.54 | 68.71 | 15.09 | 183.42 |
| 450 | 18 | 457.2 | – | – | 23.8 | 254.36 | 46.80 | 4.19 | 466.40 | 45.71 | 4.78 | 53.42 | 14.27 | 155.80 |
SS 304/304L Pipe Price Per Kg in India
SS 304 and 304L pipe prices in India vary based on pipe type, size, finish, and market demand. Rates fluctuate regularly due to changes in nickel content, steel base prices, and production costs. Our seamless pipes generally cost more than welded pipes due to higher production complexity. Pricing also depends on wall thickness, outer diameter, freight, and mill availability. Seamless pipes also attract higher GST and lead time, especially in non-standard lengths.
| Nominal Bore | Outside Diameter | Sch-5S | Rates | Sch-10S | Rates | Sch-40S | Rates | ||||
| mm | INCH | mm | Wt mm | Weight (Kg/mt) | Rs/Kg | Wt mm | Weight (Kg/mt) | Rs/Kg | Wt mm | Weight (Kg/mt) | Rs/Kg |
| 3 | 1/8 | 10.3 | 1.24 | 0.276 | 267.500 | 1.24 | 0.28 | 235.40 | 1.73 | 0.37 | 235.40 |
| 6 | 1/4 | 13.7 | 1.24 | 0.390 | 267.500 | 1.65 | 0.49 | 235.40 | 2.24 | 0.631 | 235.40 |
| 10 | 3/8 | 17.1 | 1.24 | 0.490 | 224.700 | 1.65 | 0.63 | 235.40 | 2.31 | 0.845 | 235.40 |
| 15 | 1/2 | 21.3 | 1.65 | 0.800 | 214.000 | 2.11 | 1.00 | 214.00 | 2.77 | 1.27 | 203.30 |
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 203.30 | 2.11 | 1.28 | 203.30 | 2.87 | 1.68 | 192.60 |
| 25 | 1 | 33.4 | 1.65 | 1.30 | 203.30 | 2.77 | 2.09 | 197.95 | 3.38 | 2.50 | 197.95 |
| 32 | 1 1/4 | 42.2 | 1.65 | 1.65 | 203.30 | 2.77 | 2.70 | 197.95 | 3.56 | 3.38 | 197.95 |
| 40 | 1 1/2 | 48.3 | 1.65 | 1.91 | 203.30 | 2.77 | 3.11 | 197.95 | 3.68 | 4.05 | 197.95 |
| 50 | 2 | 60.3 | 1.65 | 2.40 | 203.30 | 2.77 | 3.93 | 197.95 | 3.91 | 5.44 | 197.95 |
| 65 | 2 1/2 | 73.0 | 2.11 | 3.69 | 203.30 | 3.05 | 5.26 | 197.95 | 5.16 | 8.63 | 197.95 |
| 80 | 3 | 88.9 | 2.11 | 4.51 | 203.30 | 3.05 | 6.45 | 197.95 | 5.49 | 11.30 | 197.95 |
| 100 | 4 | 114.3 | 2.11 | 5.84 | 203.30 | 3.05 | 8.36 | 197.95 | 6.02 | 16.07 | 197.95 |
| 125 | 5 | 141.3 | 2.77 | 9.47 | 214.00 | 3.40 | 11.57 | 203.30 | 6.55 | 21.8 | 203.30 |
| 150 | 6 | 168.3 | 2.77 | 11.32 | 219.35 | 3.40 | 13.84 | 214.00 | 7.11 | 28.3 | 208.65 |
| 200 | 8 | 219.1 | 2.77 | 14.79 | 219.35 | 3.76 | 19.96 | 214.00 | 8.18 | 42.6 | 208.65 |
| 250 | 10 | 273.1 | 3.40 | 22.63 | 235.40 | 4.19 | 27.78 | 214.00 | 9.27 | 60.5 | 208.65 |
| 300 | 12 | 323.9 | 3.96 | 31.25 | 235.40 | 4.57 | 36.00 | 224.70 | 9.52 | 73.88 | 208.65 |
| 350 | 14 | 355.6 | 3.96 | 34.36 | 235.40 | 4.78 | 41.3 | 230.05 | 11.13 | 94.59 | 208.65 |
| 400 | 16 | 406.4 | 4.19 | 41.56 | 235.40 | 4.78 | 47.29 | 230.05 | 12.7 | 123.30 | 214.00 |
| 450 | 18 | 457.2 | 4.19 | 46.80 | 235.40 | 4.78 | 53.42 | 230.05 | 14.27 | 155.80 | 214.00 |
| 500 | 20 | 508.0 | 4.78 | 59.25 | 235.40 | 5.54 | 68.71 | 230.05 | 15.09 | 183.42 | 214.00 |
| 600 | 24 | 609.6 | 5.54 | 82.47 | 235.40 | 6.35 | 94.45 | 235.40 | 17.48 | 255.41 | 214.00 |
| NB (MM) | SIZE OD (MM) | THICKNESS (MM) | SCHEDULE | UNIT WT (KG/MTR) | PRICE LIST IN INR (Rs/MTR) | ERW PIPE PRICE ($/MTR) | |
| 15 | 21.30 | 2.11 | 1/2″ | SCH.10S | 1.02 | 231.54 | $ 3.32 |
| 21.30 | 2.77 | 1/2″ | SCH.40S | 1.29 | 292.83 | $ 4.20 | |
| 20 | 26.70 | 2.11 | 3/4″ | SCH.10S | 1.30 | 295.10 | $ 4.23 |
| 26.70 | 2.87 | 3/4″ | SCH.40S | 1.71 | 388.17 | $ 5.57 | |
| 25 | 33.40 | 2.77 | 1″ | SCH.10S | 2.12 | 481.24 | $ 6.91 |
| 33.40 | 3.38 | 1″ | SCH.40S | 2.54 | 576.58 | $ 8.27 | |
| 32 | 42.20 | 2.77 | 1.1/4″ | SCH.10S | 2.73 | 619.71 | $ 8.89 |
| 42.20 | 3.56 | 1.1/4″ | SCH.40S | 3.44 | 780.88 | $ 11.21 | |
| 40 | 48.30 | 2.77 | 1.1/2″ | SCH.10S | 3.16 | 717.32 | $ 10.29 |
| 48.30 | 3.68 | 1.1/2″ | SCH.40S | 4.11 | 932.97 | $ 13.39 | |
| 50 | 60.30 | 2.77 | 2″ | SCH.10S | 3.99 | 905.73 | $ 13.00 |
| 60.30 | 3.91 | 2″ | SCH.40S | 5.52 | 1253.04 | $ 17.98 | |
| 65 | 73.00 | 3.05 | 2.1/2″ | SCH.10S | 5.34 | 1212.18 | $ 17.40 |
| 73.00 | 5.16 | 2.1/2″ | SCH.40S | 8.76 | 1988.52 | $ 28.54 | |
| 80 | 88.90 | 3.05 | 3″ | SCH.10S | 6.55 | 1486.85 | $ 21.34 |
| 88.90 | 5.49 | 3″ | SCH.40S | 11.45 | 2599.15 | $ 37.30 | |
| 100 | 114.30 | 3.05 | 4″ | SCH.10S | 8.48 | 1924.96 | $ 27.62 |
| 114.30 | 6.02 | 4″ | SCH.40S | 16.32 | 3704.64 | $ 53.16 | |
| 125 | 141.30 | 3.40 | 5″ | SCH.10S | 11.74 | 2664.98 | $ 38.24 |
| 141.30 | 6.55 | 5″ | SCH.40S | 22.09 | 5014.43 | $ 71.96 | |
| 150 | 168.30 | 3.40 | 6″ | SCH.10S | 14.03 | 3184.81 | $ 45.70 |
| 168.30 | 7.11 | 6″ | SCH.40S | 28.69 | 6512.63 | $ 93.46 | |
| 200 | 219.10 | 3.76 | 8″ | SCH.10S | 20.27 | 4601.29 | $ 66.03 |
| 219.10 | 8.18 | 8″ | SCH.40S | 43.18 | 9801.86 | $ 140.66 | |
Prices above are approximate and subject to change based on raw material costs, pipe form, and market demand.
Resistance Capabilities
SS 304 and SS 304L pipes show strong corrosion resistance in fresh water, air, and most oxidising environments, thanks to their ~18% chromium content which forms a stable passive film. These grades handle dilute acids like nitric acid but offer limited protection in chlorides and hydrochloric acid. With excellent oxidation resistance, both perform well in temperatures up to 870°C intermittently and 925°C continuously, making them suitable for heat exchangers and furnace parts. Their pitting and stress corrosion cracking (SCC) resistance is generally reliable, though care is advised in chloride-heavy conditions. SS 304L, with its low carbon content, helps reduce carbide precipitation during welding, enhancing durability in high-heat zones.
Difference Between 304 and 304L Stainless Steel
The key difference between SS 304 and SS 304L lies in carbon content—304L contains a maximum of 0.03%, while 304 allows up to 0.08%. This lower carbon level in 304L reduces the risk of carbide precipitation during welding, improving its resistance in heat-affected zones. Both grades show excellent corrosion resistance, but stainless steel 304L pipe performs slightly better against intergranular corrosion. In terms of strength, stainless steel 304 pipe has a slightly higher yield and tensile rating, making it more suitable for structural strength. stainless steel 304L pipe is preferred in welded or high-temperature assemblies where weld integrity is critical.
| Property | 304 Stainless Steel | 304L Stainless Steel |
| Carbon Content | Max 0.08% | Max 0.03% |
| Corrosion Resistance | High | Excellent |
| Welding | Requires care | Better for welding |
| Tensile Strength | Higher (515 MPa) | Lower (485 MPa) |
| Applications | General use | Welding-heavy applications |
| Price | Higher | Lower |
Manufacturing Process of 304/304L Stainless Steel Pipes
The process begins with high-quality SS 304/304L billets or coils, which form the base for production. Depending on the type, pipes are made using hot or cold rolling, followed by either seamless extrusion or welded methods like TIG or ERW welding. Pipes undergo heat treatment to relieve stress and enhance corrosion resistance. Surfaces are cleaned using pickling and passivation, then shaped through sizing, straightening, and cutting to meet dimensional tolerances. Each pipe is tested using UT, RT, MPI, or hydrostatic tests, with mechanical checks for tensile strength, hardness, and bend performance. A chemical analysis confirms the alloy’s composition, and all pipes meet global standards such as ISO 9001:2015, PED, and EN 10204 3.1/3.2 MTCs.
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Applications
SS 304 pipes and SS 304L pipes serve across multiple industrial sectors:
- Dairy lines in food and beverage processing, brewing equipment and juice production systems where the smooth bore and passive surface eliminates bacterial adhesion
- Pharmaceutical production WFI (water for injection) loops, CIP circuits and sterile transfer lines under FDA 21 CFR and cGMP compliance
- Chemical processing, handling of weak acids, transfer of alkalis and distribution of solvents at ambient and moderately high temperatures
- Water treatment filter housings, distribution manifolds and pump casings for potable water and treated effluent systems
- Structural tubing for construction and architecture in urban and moderate exposures Handrails and cladding support frames
- General engineering instrumentation tubes, heat exchanger shells and process vessel nozzles in many manufacturing industries.
Customization Options & Stock Availability
Midland Alloys Inc. offers full SS 304 pipe customization, including cut-to-length, OD/ID variations, and special surface finishes like pickled, annealed, or polished. Pipes can be supplied with plain, beveled, or threaded ends to match project needs. Tolerances and surface finish are aligned with client drawings and technical specifications. Whether you need a bulk lot or a few pieces, the minimum order quantity (MOQ) remains flexible. Ready stock includes sizes from 1/8″ NB to 30″ NB across SCH 5 to SCH XXS, available in both seamless and welded forms. Urgent requirements are covered with same-day dispatch, while customised production follows committed timelines. This ensures prompt availability of 304L pipe stock for all industry segments.
Midland Alloys Inc., based in India, is a trusted SS 304 pipe exporter from India serving diverse international markets. We consistently supplies 304L stainless steel pipes to the UAE, Saudi Arabia, Oman, Qatar and Kuwait, driven by demand from the oil & gas and infrastructure sectors. In Europe, shipments to Germany, France, Italy and the UK have expanded with growing construction and industrial projects. The Asia-Pacific region, including Singapore, Malaysia, South Korea, and Indonesia, also relies on Indian stainless pipe exporters for quality and supply stability. Emerging markets like South Africa, Nigeria, Egypt, and Brazil are showing strong uptake, supported by robust export packaging, complete customs documentation, and reliable port logistics. We maintain strong ties with OEMs, global contractors, and distributors to support timely project deliveries and long-term supply partnerships.
All SS 304/304L pipes from Midland Alloys Inc. are manufactured in accordance with ASTM A312, A213, A249, and EN standards, ensuring global specification compliance. As an ISO 9001:2015 certified manufacturer, the company provides complete traceability with Mill Test Certificates (EN 10204 3.1 & 3.2). Third-party inspections by TUV, SGS, BV, DNV, and Lloyd’s are available upon request. The pipes meet industry-specific norms like PED 2014/68/EU, NACE MR0175, and AD 2000 W0, wherever applicable. Each batch undergoes strict quality checks, with full documentation, raw material traceability, and testing records maintained. Every stainless steel pipe is tested and verified before shipment, making Midland Alloys Inc. a dependable PED certified stainless steel pipe supplier in India.
SS 304/304L pipes from Midland Alloys Inc. are packed using export-grade methods like HDPE wrap, wooden boxes, bundles with end caps, or shrink wrap to prevent damage. Markings include heat number, grade, size, and relevant standards. Domestic delivery is handled via road or rail, while global shipping uses sea or air freight with full export documentation—commercial invoice, packing list, MTCs, and destination-specific compliance. Orders in stock often ship same day; custom orders follow committed lead times. The team handles urgent dispatches, bulk shipments, and project-based delivery with flexible stainless steel pipe packaging standards to meet GCC or European norms.
Why Source from Midland Alloys
FAQs
