Stainless Steel 304L Pipe Manufacturer, Supplier & Exporter
Amardeep Steel Centre is a high-end manufacturer, a specialized supplier and an international exporter of high quality stainless steel 304L pipes and tubes. Grade 304L being the industry standard in welded applications in corrosive environments is highly durable, has a great ability to form and has the best weld decay resistance. Our wide range of ss 304L pipes and tubes, such as stainless steel 304L seamless pipes and tubes and stainless steel 304L welded pipes and tubes, is tested to international standards, such as ASTM and ASME standard, assuring superior quality of our products to your projects.
What is Stainless Steel 304L?
The stainless steel that is used most in welded components is Stainless Steel 304L. The L in its name signifies the Low Carbon which is its characteristic and most important attribute. A 304L ss pipe is made of the same chemical composition as an ordinary Grade 304 but the amount of carbon is limited to a maximum of 0.03%. This low amount of carbon inhibits a process referred to as sensitization or intergranular corrosion (weld decay). In welding of standard 304, chromium carbides may form at the grain boundaries within the heat affected area, consuming chromium, rendering it prone to corrosion. This is reduced by welding SS 304L Pipes, which can then be welded without posing this risk so that the corrosion resistance of the weld joint is as high as that of the underlying base metal. This causes the SS 304L pipe to be the default pipe in any application that needs welding.
Table of Contents
SS 304L Pipe & Tube Specifications
| Specification | Details |
|---|---|
| Grade | Stainless Steel 304L (UNS S30403), Werkstoff Nr. 1.4307 / 1.4306 |
| Pipe Standards | ASTM A312 / ASME SA312 (Seamless & Welded), ASTM A358 / ASME SA358 (EFW) |
| Tube Standards | ASTM A213 / ASME SA213, ASTM A269 / ASME SA269, ASTM A249 / ASME SA249 |
| Seamless Pipe Size Range | 1/2″ NB – 16″ NB |
| Welded / ERW Pipe Size Range | 1/2″ NB – 24″ NB |
| EFW / LSAW Pipe Size Range | 6″ NB – 100″ NB |
| Schedules Available | SCH 5S, SCH 10S, SCH 20, SCH 30, SCH 40S, STD, SCH 80S, XS, SCH 120, SCH 160, XXS |
| Pipe Types | Seamless, Welded, ERW, EFW, Fabricated, LSAW |
| Pipe Forms | Round, Square, Rectangular, Oval, Hollow, Hydraulic |
| Length | Single Random (4.8–7.0 m), Double Random (7.0–14.0 m), Cut to Length |
| End Finish | Plain End (PE), Beveled End (BE), Threaded |
SS 304L Pipe Size & Weight Chart
| NPS (in) | OD (mm) | SCH 5S WT (mm) | SCH 10S WT (mm) | SCH 40S WT (mm) | SCH 80S WT (mm) | Weight SCH 40S (kg/m) |
|---|---|---|---|---|---|---|
| 1/2 | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 | 1.27 |
| 3/4 | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 | 1.69 |
| 1 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 | 2.50 |
| 1-1/4 | 42.2 | 1.65 | 2.77 | 3.56 | 4.85 | 3.39 |
| 1-1/2 | 48.3 | 1.65 | 2.77 | 3.68 | 5.08 | 4.05 |
| 2 | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 | 5.44 |
| 2-1/2 | 73.0 | 2.11 | 3.05 | 5.16 | 7.01 | 8.63 |
| 3 | 88.9 | 1.65 | 3.05 | 5.49 | 7.62 | 11.29 |
| 4 | 114.3 | 1.65 | 3.05 | 6.02 | 8.56 | 16.07 |
| 6 | 168.3 | 1.65 | 3.40 | 7.11 | 10.97 | 28.26 |
| 8 | 219.1 | 1.65 | 3.76 | 8.18 | 12.70 | 42.55 |
| 10 | 273.1 | 1.65 | 4.19 | 9.27 | 15.09 | 60.29 |
| 12 | 323.9 | 1.65 | 4.57 | 10.31 | 17.48 | 80.13 |
SS 304L Pipe Schedule Chart (Wall Thickness in mm)
| NPS (in) | OD (mm) | SCH 5S | SCH 10S | SCH 40S / STD | SCH 80S / XS | SCH 120 | SCH 160 | XXS |
|---|---|---|---|---|---|---|---|---|
| 1/2 | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 | – | 4.78 | 7.47 |
| 3/4 | 26.7 | 1.65 | 2.11 | 2.87 | 3.91 | – | 5.56 | 7.82 |
| 1 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 | – | 6.35 | 9.09 |
| 1-1/2 | 48.3 | 1.65 | 2.77 | 3.68 | 5.08 | – | 7.14 | 9.53 |
| 2 | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 | 8.74 | 8.74 | 11.07 |
| 3 | 88.9 | 1.65 | 3.05 | 5.49 | 7.62 | 11.13 | 11.13 | 15.24 |
| 4 | 114.3 | 1.65 | 3.05 | 6.02 | 8.56 | 13.49 | 13.49 | 17.12 |
| 6 | 168.3 | 2.11 | 2.77 | 7.11 | 10.97 | 14.27 | 18.26 | 21.95 |
| 8 | 219.1 | 2.11 | 2.77 | 8.18 | 12.70 | 18.26 | 23.01 | 22.23 |
| 10 | 273.1 | 2.77 | 3.40 | 9.27 | 15.09 | 21.44 | 28.58 | 25.40 |
| 12 | 323.9 | 2.77 | 3.96 | 10.31 | 17.48 | 25.40 | 33.32 | 25.40 |
Chemical Composition of Stainless Steel 304L Pipes and Tubes
| Grade | C | Mn | Si | P | S | Cr | Ni | N |
|---|---|---|---|---|---|---|---|---|
| 304L | 0.030 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 12.0 | 0.10 |
Mechanical Properties of Stainless Steel 304L Pipes and Tubes
| 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 | 485 | 170 | 40 | 92 | 201 |
Physical Properties of Stainless Steel 304L Pipes and Tubes
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 304L | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Equivalent Grades for Stainless Steel 304L Pipes and Tubes
| STANDARD | WERKSTOFF NR. | UNS | JIS | AFNOR | BS | GOST | EN |
|---|---|---|---|---|---|---|---|
| SS 304L | 1.4306/1.4307 | S30403 | SUS 304L | Z3CN18‐10 | 304S11 | 03Х18Н11 | X2CrNi18-9 / X2CrNi19-11 |
Dimensional Tolerances for SS 304L (ASTM A312)
| Feature | Specification / Tolerance |
|---|---|
| Outside Diameter (OD): Up to 1.5" NB | ±pm 0.4 mm |
| Outside Diameter (OD): 1.5" to 4" NB | ±pm 0.8 mm |
| Outside Diameter (OD): Above 4" NB | ±pm 1.6 mm |
| Wall Thickness | −12.5% of specified wall thickness |
| Straightness | Max 3 mm per 1500 mm length |
| Length: Single Random | 4.8 m – 7.0 m |
| Length: Double Random | 7.0 m – 14.0 m |
| Length: Cut Length | As specified pm ±6 mm |
Surface Finish Options for SS 304L Pipes & Tubes
| Surface Finish | Internal Surface (ID) Roughness (Ra) | External Surface (OD) Roughness (Ra) |
|---|---|---|
| AP (Annealed & Pickled) | Not defined | 40 \mu inch (1.0 \mu m) or Not defined |
| BA (Bright Annealed) | 40, 32, 25, 20 \mu inch (1.0, 0.8, 0.6, 0.5 \mu m) | 32 \mu inch (0.8 \mu m) |
| MP (Mechanical Polish) | 40, 32, 25, 20 \mu inch (1.0, 0.8, 0.6, 0.5 \mu m) | 32 \mu inch (0.8 \mu m) |
| EP (Electro Polish) | 15, 10, 7, 5 \mu inch (0.38, 0.25, 0.20, 0.13 \mu m) | 32 \mu inch (0.8 \mu m) |
SS 304L Pipe Pressure Ratings (ASME B31.3)
Indicative allowable pressure ratings for SS 304L seamless pipes per ASME B31.3. Values are based on ASTM A312 TP304L material. Consult ASME B31.3 or our technical team for exact design pressures.
| NPS (in) | OD (mm) | Schedule | WT (mm) | Max Pressure at 20°C (bar) | Max Pressure at 200°C (bar) | Max Pressure at 400°C (bar) |
|---|---|---|---|---|---|---|
| 1/2 | 21.3 | SCH 40S | 2.77 | 285 | 225 | 195 |
| SCH 80S | 3.73 | 410 | 325 | 280 | ||
| 2 | 60.3 | SCH 40S | 3.91 | 162 | 128 | 111 |
| SCH 80S | 5.54 | 236 | 186 | 162 | ||
| 4 | 114.3 | SCH 40S | 6.02 | 132 | 104 | 91 |
| SCH 80S | 8.56 | 192 | 152 | 132 | ||
| 6 | 168.3 | SCH 40S | 7.11 | 106 | 84 | 73 |
| SCH 80S | 10.97 | 168 | 133 | 115 | ||
| 8 | 219.1 | SCH 40S | 8.18 | 94 | 74 | 64 |
| SCH 80S | 12.70 | 148 | 117 | 102 |
Applications of SS 304L Pipes & Tubes
SS 304L pipes are chosen across industries for their excellent corrosion resistance, low-carbon weld integrity, and wide operating temperature range:
- Chemical & Petrochemical Plants: Process piping for acids, alkalis, and corrosive fluids where welded joints are required without post-weld heat treatment.
- Food & Beverage Industry: Hygienic piping for food processing, brewing, dairy, and pharmaceutical manufacturing (FDA compliant surface finishes available).
- Water Treatment & Desalination: Pipelines for potable water, reverse osmosis systems, and wastewater treatment plants.
- Oil & Gas Industry: Offshore platforms, onshore refineries, LNG facilities, and subsea pipelines.
- Cryogenic Service: LNG transfer lines and cryogenic storage systems operating down to −196°C.
- Power Generation: Heat exchangers, condensers, feedwater heaters, and steam distribution lines.
- Pharmaceutical & Biotech: Ultra-clean piping for API manufacturing, CIP/SIP systems, and cleanroom utilities.
- Pulp & Paper Industry: Bleach plant piping, digesters, and process lines in corrosive environments.
- Architecture & Construction: Structural tubing, handrails, cladding, and facades in marine or corrosive environments.
ASTM A312 SS F304L Seamless Pipes Prices List
| Product Description | Price in India (INR) | Price in UAE (Dirham - AED) |
|---|---|---|
| SS Seamless Pipe (ASTM A312 Grade TP-304L) | ₹ 218.00 / kg | 8.50 AED / kg |
| SS Welded Pipe (Grade 304L) | ₹ 175.00 / kg | 6.83 AED / kg |
| SS Seamless Pipes (Cold Finished - 304L) | ₹ 211.00 / kg | 8.23 AED / kg |
Testing, Inspection & Certifications for SS 304L Pipes
All SS 304L pipes from Amardeep Steel Centre undergo the following tests and are shipped with full documentation.
Standard tests performed:
- Chemical analysis (spectrometric)
- Tensile & yield strength test
- Hardness test (Rockwell B / Brinell)
- Hydrostatic / pneumatic leak test
- Eddy current test (seamless tubes)
- Ultrasonic test (UT) on request
- Intergranular corrosion test (IGC) per ASTM A262
Special service tests available:
- NACE MR0175 / ISO 15156 compliance (sour service)
- Cryogenic service test (impact testing at -196 deg C)
- Oxygen-cleaned pipes (O2 service)
- Hydrogen (H2) service inspection
Documentation supplied:
- Mill Test Certificate (MTC) per EN 10204 3.1
- Certificate of Conformance
- Packing List & Country of Origin Certificate
- Third-party inspection (SGS, BV, DNV, Lloyds) on request
Frequently Asked Questions (FAQ)
What is the difference between SS 304 and SS 304L pipe?
SS 304L has a maximum carbon content of 0.03% vs 0.08% for standard 304. The lower carbon prevents sensitisation (intergranular corrosion) in the heat-affected zone during welding. For all welded fabrications, 304L is the default choice.
What does ASTM A312 TP304L mean?
ASTM A312 is the American standard for seamless, welded, and heavily cold-worked austenitic stainless steel pipes. TP304L is the type designation for UNS S30403, the low-carbon 304 grade.
What is the difference between SS 304 and SS 304L pipe?
SS 304L has a maximum carbon content of 0.03% vs 0.08% for standard 304. The lower carbon prevents sensitisation (intergranular corrosion) in the heat-affected zone during welding. For all welded fabrications, 304L is the default choice.
What is the maximum operating temperature for SS 304L pipe?
Continuous service up to 870 ° C (1,600 °F). Intermittent service up to 925 ° C. For prolonged high-temperature service, specify SS 304H.
What size range does Amardeep Steel supply for SS 304L pipes?
Seamless: 1/2" to 16" NB. Welded/ERW: 1/2" to 24" NB. EFW: 6" to 100" NB. All standard schedules SCH 5S to XXS.
Is SS 304L pipe suitable for cryogenic service?
Yes. SS 304L retains toughness at -196 deg °C. Used in LNG piping, cryogenic storage, and low-temperature process lines.
Can SS 304L pipes meet NACE MR0175 (sour service)?
Yes, under specific hardness controls per NACE MR0175 / ISO 15156. Specify when requesting a quote.
What certifications are supplied with SS 304L pipes?
All pipes ship with EN 10204 3.1 MTC. Third-party inspection by SGS, BV, DNV, or Lloyds available on request.
How is the price of SS 304L pipe calculated?
Per kg or per piece. Depends on size, schedule, pipe type (seamless vs welded), quantity, surface finish, and certifications. See price table above or contact us for a formal quotation.