Stainless Steel Pipe products from Lianhe Valve (Wenzhou Lianhe Valve Fitting Co., Ltd.) deliver exceptional durability and corrosion resistance for industrial and commercial systems. As a professional stainless steel pipe manufacturer and supplier, we provide seamless and welded options that meet international standards such as ASTM, ASME, DIN, and ISO. Our pipes are engineered for long service life, high temperature resistance, and environmental protection, making them ideal for industries including oil and gas, food processing, and water treatment.
With decades of experience and a fully integrated approach to R&D, manufacturing, and sales, Lianhe Valve ensures consistent quality and reliability in every product. Explore our complete range of piping and fitting solutions on the Lianhe Valve official website.
We offer two main categories: welded stainless steel pipe and seamless stainless steel pipe. Each type is designed for specific applications and performance requirements. All products comply with ASTM A312 and DIN standards for dimensional accuracy and material consistency.
| Pipe Type | Manufacturing Method | Typical Applications |
| Welded Stainless Steel Pipe | Rolled and longitudinally welded from stainless steel sheets | Construction, water supply, low to medium pressure systems |
| Seamless Stainless Steel Pipe | Extruded without welds for a uniform structure | Oil, gas, and chemical industries under high pressure and temperature |
Our welded stainless steel pipe is produced by rolling and welding stainless steel plates, ensuring uniform wall thickness and smooth finishes. It offers excellent cost efficiency and is ideal for construction, water systems, and general industrial applications where moderate pressure resistance is sufficient. These pipes are easy to fabricate and available in various sizes and finishes.
Seamless stainless steel pipe is manufactured through extrusion, resulting in a continuous structure without welds. This makes it suitable for high-pressure and high-temperature conditions such as oil refineries, chemical plants, and power generation systems. The seamless design enhances mechanical strength and ensures leak-free performance.
Our stainless steel pipes are widely used in oil and gas, chemical processing, food and beverage, construction, and water treatment industries. Their corrosion resistance and hygienic properties make them ideal for sanitary systems, while their strength and durability support structural and fluid transport applications. They are fully compatible with matching stainless steel fittings and flanges for complete system integration.
Oil and gas pipelines requiring high corrosion resistance
Chemical processing systems handling aggressive fluids
Food and beverage production with hygienic requirements
Construction and infrastructure projects
Water supply and environmental protection systems
Lianhe Valve manufactures stainless steel pipes in grades 304, 304L, 316, and 316L, covering a full range of dimensions, wall thicknesses, and surface finishes such as polished, pickled, or brushed. All products meet or exceed ASTM A312, ASME B16.9, DIN, and ISO standards, ensuring compatibility with global engineering requirements.
| Grade | Main Characteristics | Common Uses |
| 304 / 304L | Excellent corrosion resistance and weldability | General industrial and food applications |
| 316 / 316L | Enhanced resistance to chlorides and acids | Marine, chemical, and pharmaceutical environments |
Each stainless steel pipe produced by Lianhe Valve undergoes strict quality control. We hold ISO, CE, and ECA certifications, ensuring compliance with international manufacturing and safety standards. Hydrostatic and non-destructive testing verify pressure integrity and structural soundness. From raw material inspection to final delivery, our certified products are monitored at every stage to ensure consistent performance in industrial and commercial applications.
As a leading stainless steel pipe manufacturer and supplier in China, Lianhe Valve integrates research, design, production, and sales to deliver complete piping solutions. We maintain large stock availability for fast delivery and offer customized specifications to meet unique project requirements. With extensive experience across multiple industries and adherence to global standards, we are a trusted partner for durable, corrosion-resistant piping systems.
Selecting the right stainless steel pipe depends on factors such as pressure, temperature, and environmental exposure. Use the guide below to help determine the best option for your project:
| Condition | Recommended Pipe Type | Suggested Grade |
| High pressure / temperature | Seamless stainless steel pipe | 316L |
| General industrial service | Welded stainless steel pipe | 304 / 304L |
| Corrosive or marine environments | Seamless or welded | 316 / 316L |
Choose seamless pipes for high-stress or safety-critical systems.
Select welded pipes for cost-effective general applications.
Consult our technical team for tailored solutions to match your project needs.
For expert assistance and quotations, reach out through our stainless steel pipe inquiry page.
Q1: What is the difference between welded and seamless stainless steel pipes?
A1: Welded pipes are made by rolling and welding steel sheets, ideal for general applications. Seamless pipes are extruded for high-pressure and high-temperature uses.
Q2: Which stainless steel grades are most commonly used?
A2: Grades 304, 304L, 316, and 316L are most common due to their excellent corrosion resistance and mechanical strength.
Q3: Are Lianhe Valve’s stainless steel pipes certified?
A3: Yes. All our pipes comply with ISO, CE, and ASTM standards, ensuring consistent quality and performance.
Q4: Can stainless steel pipes be used for food and beverage applications?
A4: Yes. Their hygienic and corrosion-resistant properties make them suitable for food, beverage, and water treatment systems.
Q5: How can I get a quotation?
A5: Contact us directly through the contact page or email your specifications for a prompt quotation.
Partner with Lianhe Valve, a trusted stainless steel pipe manufacturer and supplier, to secure high-quality, certified, and reliable piping solutions for your industry.
