Low Carbon Grade · Excellent Weldability · Enhanced Corrosion Resistance | Suitable for Welded Piping, Chemical & Food Applications
Manufacturing Process
TP304L stainless steel pipe is a typical low-carbon austenitic stainless steel material. By reducing the carbon content (≤0.03%), carbide precipitation during welding is effectively minimized, thereby significantly improving its resistance to intergranular corrosion. It is particularly suitable for welded structures and corrosive environments.
The "L" grade indicates Low Carbon. It effectively reduces carbide precipitation during welding, thereby significantly enhancing the material’s resistance to intergranular corrosion. It is especially suitable for engineering projects with high welding performance requirements.
TP304L not only inherits the general properties of 304 stainless steel but also, through low-carbon optimization, performs more reliably in welded structures, high corrosion resistance requirements, and long-term service applications. It is one of the most widely used materials in the chemical, energy, and sanitary industries.
ASTM A312 / ASME SA312 TP304L pipes and tubes comply with internationally recognized standards and cover multiple manufacturing forms, including:
This standard is applicable to piping systems used in high-temperature, high-pressure, and corrosive media environments, ensuring stable performance in both mechanical properties and durability.
| Parameter | Details |
| Standard | ASTM A312 / ASME SA312 |
| Material Grade | TP304L |
| Outer Diameter | 6 mm – 426 mm |
| Wall Thickness | 0.5 mm – 13 mm |
| Length | Random / Fixed / Custom |
| Type | Seamless / Welded |
| Surface Finish | Pickled, Annealed, Polished |
| Element | Content (%) |
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 12.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Property | Value |
| Tensile Strength | ≥ 485 MPa (70 ksi) |
| Yield Strength (0.2% Offset) | ≥ 170 MPa (25 ksi) |
| Elongation | ≥ 35% |
Low Carbon Design (≤0.03%)
Reduces the risk of intergranular corrosion and improves the stability and service life of welded areas.
Excellent Corrosion Resistance
Performs well in general industrial environments, chemical media, and mild marine environments.
Outstanding Weldability
Excellent weldability, and in most applications no post-weld heat treatment (annealing) is required.
Wide Temperature Adaptability
Suitable for a variety of operating conditions ranging from low to high temperatures, with stable performance.
Good Mechanical Properties
Maintains relatively high strength and durability even under extreme or complex working conditions.
Excellent Surface Quality
Smooth surface, easy to clean, suitable for sanitary applications such as food and pharmaceutical industries.
TP304L stainless steel pipes are widely used in various industrial and civil fields due to their excellent corrosion resistance, resistance to intergranular corrosion, and good formability and weldability. They are especially suitable for fluid transport and structural applications in high-temperature and corrosive media environments.
TP304L is particularly suitable for the following operating conditions:
Chemical and Petrochemical Industry
Used for transporting various corrosive media, widely applied in:
Oil and Gas Industry
Suitable for oil and gas transportation and processing systems:
Food and Pharmaceutical Industry
Meets high sanitary standards:
Water Treatment and Environmental Engineering
Used in various water treatment systems:
Energy and Power Industry
Suitable for high-temperature heat exchange and energy transfer equipment:
Marine and Structural Applications
Performs well in specific environments:
TP304L stainless steel pipes exhibit outstanding performance in intergranular corrosion resistance, weldability, and environmental adaptability. They are particularly suitable for industrial systems requiring high safety, stability, and long service life, making them an ideal choice for industries such as petrochemical, energy, water treatment, and food and pharmaceuticals.
Dual Standard Certification (ASTM A312 / ASME SA312)
Complies with internationally recognized specifications, facilitating global project acceptance and engineering applications.
Low Carbon Material (TP304L)
Effectively reduces carbide precipitation during welding and minimizes the risk of intergranular corrosion.
Excellent Corrosion Resistance
Suitable for chemical, petrochemical, and a wide range of corrosive media environments.
Outstanding Weldability
The low-carbon characteristics provide greater stability during welding, and post-weld heat treatment is usually not required.
Good Temperature Adaptability
Maintains stable mechanical properties under both high-temperature and low-temperature conditions.
Strong Structural Stability
Reliable performance during long-term operation, suitable for continuous industrial applications.
Wide Size Range & High Customizability
Supports various size specifications and customized processing requirements to suit different engineering scenarios.
Long Service Life with Low Maintenance Cost
Excellent overall performance helps reduce long-term operation, maintenance, and replacement costs.
The production of ASTM A312 TP304L stainless steel pipes strictly follows international standards. Through a standardized manufacturing process and multiple layers of quality control, the product ensures stable and reliable performance in terms of corrosion resistance, mechanical properties, and dimensional accuracy.
Production Process
Testing Methods
Quality Control and Surface Treatment
Quality Assurance and Certification
Through strict manufacturing processes and a comprehensive quality system, ASTM A312 TP304L stainless steel pipes maintain stable performance under high temperature, corrosive, and complex working conditions, and are widely used in industries such as petrochemicals, food and pharmaceuticals, water treatment, and energy.
Although 304 and 304L appear very similar, the key difference lies in the carbon content:
As a professional manufacturer, we provide ASTM A312 / ASME SA312 TP304L stainless steel pipes with a strong focus on quality consistency, customization capability, and reliable global supply. Our production system and service framework are designed to meet the requirements of international engineering projects.
Our Advantages
Strict Quality Control from Raw Material to Finished Products
We implement a comprehensive quality management system covering every stage of production—from raw material inspection to final testing—to ensure stable mechanical properties and corrosion resistance.
Custom Sizes & Specifications Available
We support a wide range of dimensions, wall thicknesses, and surface finishes, along with customized fabrication to meet specific project requirements.
Competitive Pricing & Efficient Delivery
With optimized production processes and supply chain management, we offer cost-effective solutions while maintaining fast and reliable delivery schedules.
Extensive Global Export Experience
We have years of experience serving international markets, ensuring smooth export procedures, proper documentation, and compliance with global standards.
Professional Technical Support and After-Sales Service
Our technical team provides guidance on material selection, application, and installation, along with responsive after-sales support to ensure long-term project success.
Q1: What is the difference between ASTM A312 and ASME SA312?
A: The material standards are essentially the same. ASTM is a standard developed by the American Society for Testing and Materials, while ASME SA312 is a material specification recognized by the American Society of Mechanical Engineers for use in boilers and pressure vessels. Typically, ASME standards place more emphasis on safety factors for pressure-containing equipment.
Q2: Can you provide customized lengths and elbow processing?
A: Yes. We offer fixed-length cutting (Random Length or Custom Length), and can provide prefabricated bends, coiled tubes, and pipe fittings based on drawings.
Q3: What is the Minimum Order Quantity (MOQ)?
A: For standard sizes of TP304L seamless pipes, we support retail sales with no strict minimum order quantity. For large-diameter welded pipes, please consult our sales engineers.
Explore our full range of stainless steel grades for pipes and tubes, including TP304, TP316, TP321, duplex, and super duplex materials.
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