Products Description
our Advantages
1. Weld Quality
Our Large Diameter Welded Stainless Steel Pipes utilize automated welding processes with strict control of heat input. The welds undergo full penetration welding and appropriate solution annealing treatment to ensure that the mechanical properties and corrosion resistance of the weld metal and heat-affected zone are comparable to the base material.
2. Strong Corrosion Resistance
Our pipes are made of high-quality stainless steel, possessing excellent corrosion resistance, pitting resistance, and oxidation resistance, suitable for harsh industrial environments, and the pipes are pickled and passivated to enhance their corrosion resistance.
3. High Temperature Resistance
Our Large Diameter Welded Stainless Steel Pipes have excellent thermal cycling resistance, able to withstand repeated heating and cooling cycles without cracking or deformation, making them suitable for applications with large temperature fluctuations, such as power plants and refineries.
4. Dimensional Accuracy
Our pipes are manufactured using precision forming and automated welding processes, and undergo mechanical sizing and straightening processes to effectively eliminate deformation caused by forming and welding heat, ensuring that the pipe's outer diameter, wall thickness, and straightness meet ASTM A358 standards or customer requirements.
5. Quality Control
Our pipes undergo a series of rigorous tests, including chemical composition testing, mechanical performance testing, ultrasonic testing, hydrostatic testing, and welding quality inspection, and comply with ISO 9001, ISO 14001, CE, and other certifications.
6. Packaging and Transportation
Our pipes are available with various packaging options, including plastic end caps, plastic film, woven bags, and wooden crates/iron frames, to prevent damage or contamination during transportation. We support various transportation methods, including sea, air, and land transport.
applications areas
- Petrochemical: Transportation of corrosive liquids, gases, and by-products in refineries and chemical processing plants, as well as cooling water systems, distillation units, and heat exchanger piping.
- Power Generation: Cooling water lines, flue gas desulfurization systems, steam transmission piping, and piping systems in fossil fuel and nuclear power plants.
- Construction: Structural supports, load-bearing columns, and building frames.
- Municipal Infrastructure: Municipal water and wastewater management piping, as well as underground and above-ground electrical distribution networks requiring corrosion resistance.
Chemical Composition
| Element | Carbon | Manganese | Silicon | Phosphorus | Sulfur | Chromium | Nickel | Molybdenum |
| 304 | ≤0.08 | ≤2.00 | ≤1.00 | ≤0.045 | ≤0.030 | 18.0–20.0 | 8.0–11.0 | - |
| 304L | ≤0.035 | ≤2.00 | ≤1.00 | ≤0.045 | ≤0.030 | 18.0–20.0 | 8.0–12.0 | - |
| 316 | ≤0.08 | ≤2.00 | ≤1.00 | ≤0.045 | ≤0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
| 316L | ≤0.035 | ≤2.00 | ≤1.00 | ≤0.045 | ≤0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRB) |
| 304/304L | ≥515 | ≥205 | ≥35 | ≤90 |
| 316/316L | ≥515 | ≥205 | ≥35 | ≤90 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| 321 / 321H | It exhibits excellent resistance to intergranular corrosion after welding or high-temperature exposure, making it suitable for boilers, heat exchangers, and superheaters. |
| 904L | It possesses high strength, high corrosion resistance, and excellent weldability, making it ideal for seawater pipelines in desalination plants or offshore applications. |
| 2205, 2507 | Compared to 316/316L, it offers superior resistance to pitting and crevice corrosion, making it suitable for chemical industries requiring high-performance corrosion resistance. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
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