ASTM A312 TP304L 6 Inch Sch 10S Welded Stainless Steel Pipe For Chemical Processing And Industrial Piping Systems
ASTM A312 TP304L 6 Inch Sch 10S Welded Stainless Steel Pipe is a welded stainless steel pipe manufactured from TP304L low-carbon austenitic stainless steel in accordance with the ASTM A312 standard. It features a 6-inch nominal pipe size (NPS 6 / DN150) and a Schedule 10S wall thickness, making it an economical and reliable choice for low- to medium-pressure piping systems.
Specifications
| Item | Specification |
|---|---|
| Product Name | ASTM A312 TP304L 6 Inch Sch 10S Welded Stainless Steel Pipe |
| Material Grade | TP304L (UNS S30403) |
| Product Type | Welded Stainless Steel Pipe |
| Nominal Pipe Size (NPS) | 6 Inch |
| Nominal Diameter (DN) | DN150 |
| Pipe Schedule | Sch 10S |
| Outside Diameter (OD) | 168.3 mm (6.625") |
| Wall Thickness | 3.40 mm (0.134") |
| Inside Diameter (ID) | 161.5 mm (6.358") |
| Theoretical Weight | 13.8 kg/m (9.27 lb/ft) |
| Standard | ASTM A312, ASME B36.19M |
| Manufacturing Process | Electric Fusion Welded (EFW) / ERW / TIG Welded (as required) |
| Standard Length | 6 m, 12 m, or Customized |
| End Type | Plain End (PE), Beveled End (BE), Threaded (Optional) |
| Surface Finish | Pickled & Annealed (P&A), Bright Annealed (BA), Polished, No.4 |
| Inspection & Testing | PMI, Hydrostatic Test, Eddy Current Test, Ultrasonic Test, Dimensional Inspection, Visual Inspection |
| Certification | EN 10204 3.1 Mill Test Certificate (MTC), ISO 9001 |
| Packing | Plastic Caps, Bundles, Wooden Cases, or Export Seaworthy Packing |
| Applications | Chemical Processing, Industrial Piping Systems, Petrochemical Plants, Water Treatment, Food & Beverage Processing, Pharmaceutical Industry, Heat Exchanger Systems, Oil & Gas, Marine Engineering |
Compared with standard TP304, TP304L contains a lower carbon content (maximum 0.03%), which significantly improves weldability and reduces the risk of intergranular corrosion after welding. This makes it particularly suitable for fabrication, field welding, and corrosive service environments.
The pipe has a 168.3 mm outside diameter and a 3.40 mm wall thickness, providing an excellent balance of strength, corrosion resistance, and weight. It is manufactured in accordance with ASME B36.19M dimensional requirements and is available in standard or custom lengths to meet different project needs.
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.75 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 18.0–20.0 |
| Nickel (Ni) | 8.0–12.0 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
Physical Properties (TP304L Stainless Steel)
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting Range | 1,400–1,450°C |
| Thermal Conductivity (100°C) | 16.2 W/m·K |
| Electrical Resistivity (20°C) | 0.72 μΩ·m |
| Specific Heat (20°C) | 500 J/kg·K |
| Coefficient of Thermal Expansion (20–100°C) | 17.2 × 10⁻⁶/K |
| Modulus of Elasticity | 193 GPa |
Mechanical Properties (ASTM A312 TP304L)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 485 MPa (70 ksi) |
| Yield Strength (0.2% Offset) | ≥ 170 MPa (25 ksi) |
| Elongation | ≥ 35% |
| Hardness | ≤ 92 HRB (Approx. ≤ 201 HB) |
| Modulus of Elasticity | 193 GPa |
| Poisson's Ratio | 0.29 |
| Grade | Standard |
|---|---|
|
TP304
|
ASTM A312
|
| TP304L | ASTM A312 |
| TP316 | ASTM A312 |
| TP316L | ASTM A312 |
| TP321 | ASTM A312 |
| Duplex 2205 | ASTM A790 |
Thanks to its excellent resistance to oxidation, moisture, mild chemicals, and many industrial fluids, ASTM A312 TP304L 6 Inch Sch 10S welded stainless steel pipe is widely used in chemical processing plants, industrial piping systems, petrochemical facilities, water treatment plants, food and beverage processing, pharmaceutical manufacturing, heat exchanger systems, and general process piping.
Ideal for transporting acids, alkalis, solvents, and other corrosive process fluids with reliable corrosion resistance.
Used in low- to medium-pressure piping networks for water, steam, compressed air, and industrial fluid transfer.
Suitable for handling refined products, process chemicals, and utility piping in refineries and petrochemical plants.
Commonly used in clean water, wastewater, filtration, and desalination systems due to its excellent corrosion resistance.
Provides a hygienic, easy-to-clean surface for processing and transporting food-grade liquids and beverages.
Meets the requirements of sanitary piping systems where cleanliness and corrosion resistance are essential.
Delivers reliable performance in heat transfer equipment operating under low- to medium-pressure conditions.
Widely applied in manufacturing plants and industrial facilities for safe and efficient fluid transportation.
| Parameter | Value |
|---|---|
| Product | ASTM A312 TP304L 6 Inch Sch 10S Welded Stainless Steel Pipe |
| Outside Diameter (OD) | 168.3 mm (6.625") |
| Wall Thickness | 3.40 mm (0.134") |
| Minimum Tensile Strength | 485 MPa (70 ksi) |
| Theoretical Burst Pressure | ≈19.6 MPa (196 bar / 2,840 psi) |
| Design Pressure | To be determined in accordance with ASME B31.3 or applicable design codes |
TP304L stainless steel offers outstanding resistance to oxidation, moisture, and a wide range of chemicals, making it suitable for corrosive industrial environments.
The low carbon content (≤0.03%) minimizes carbide precipitation during welding, reducing the risk of intergranular corrosion and eliminating the need for extensive post-weld heat treatment.
The Sch 10S wall thickness provides a lighter weight than thicker pipe schedules, lowering transportation, installation, and material costs without compromising performance in low- to medium-pressure applications.
Manufactured in accordance with ASTM A312 and ASME B36.19M, the pipe delivers reliable mechanical strength and long service life under demanding operating conditions.
The smooth bore minimizes pressure loss, improves flow efficiency, and reduces the accumulation of scale and contaminants.
The pipe can be easily welded, cut, and fabricated, making it suitable for a wide variety of industrial piping projects.
Ideal for chemical processing, petrochemical plants, water treatment, food and beverage production, pharmaceutical manufacturing, heat exchanger systems, and general industrial piping.
Manufactured to ASTM A312 and ASME B36.19M standards, with Mill Test Certificates (EN 10204 3.1) available upon request, ensuring consistent quality and global acceptance.
1. What is ASTM A312 TP304L 6 Inch Sch 10S welded stainless steel pipe?
It is a welded stainless steel pipe manufactured from low-carbon TP304L stainless steel in accordance with ASTM A312 and ASME B36.19M standards. It is commonly used in low- to medium-pressure industrial piping systems.
2. What are the dimensions of a 6 Inch Sch 10S stainless steel pipe?
A 6-inch Sch 10S pipe has an outside diameter of 168.3 mm (6.625 inches) and a wall thickness of 3.40 mm (0.134 inches).
3. Why choose TP304L instead of TP304?
TP304L has a lower carbon content, offering better weldability and improved resistance to intergranular corrosion after welding, making it ideal for welded piping systems.
4. Can this pipe be used for chemical processing?
Yes. TP304L provides excellent resistance to many chemicals, organic acids, and industrial fluids, making it suitable for chemical processing plants and industrial piping systems.
5. Is Sch 10S suitable for high-pressure applications?
Sch 10S is primarily designed for low- to medium-pressure services. For high-pressure systems, thicker schedules such as Sch 40S or Sch 80S are generally recommended.
6. What standards does this pipe comply with?
The pipe is manufactured in accordance with ASTM A312 for material requirements and ASME B36.19M for dimensions.
7. What surface finishes are available?
Common finishes include Pickled & Annealed (P&A), Bright Annealed (BA), and polished finishes. Custom surface treatments are also available.
8. What inspections are performed before delivery?
Each pipe can undergo PMI, hydrostatic testing, dimensional inspection, visual inspection, and non-destructive testing such as eddy current or ultrasonic testing, depending on customer requirements.
9. Can custom sizes and lengths be supplied?
Yes. Custom lengths, end preparations, and surface finishes can be manufactured according to project specifications.
10. Which industries commonly use this pipe?
It is widely used in chemical processing, petrochemical, water treatment, food and beverage, pharmaceutical, marine engineering, heat exchanger systems, and general industrial process piping.
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