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Help Center316L Stainless Steel Seamless Pipe DN50 5M Length Annealed Pickled ASTM A213 For Food Processing Equipment
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Welcome to Hemaokang Steel (Shandong) Co., Ltd., your reliable partner for high-performance stainless steel solutions. Our 316L Stainless Steel Seamless Pipe DN50, offered in 5-meter lengths and supplied in annealed and pickled condition, is purpose-built for the demanding standards of food processing equipment. With exceptional corrosion resistance, a smooth hygienic surface, and dimensional consistency, this pipe helps maintain product purity while ensuring long service life. Backed by an ISO9001 quality system and annual exports of up to US$100 million, we are committed to delivering stainless steel products that meet global industrial needs.
316L seamless pipe manufactured to ASTM A213 is engineered for applications that require a clean, durable, and corrosion-resistant piping solution. The DN50 size is a common choice for food processing lines where stainless steel piping connects processing tanks, pumps, and dispensing equipment. The seamless design eliminates weld seams that could harbor bacteria, while the annealed and pickled surface provides a smooth, scale-free finish that is easy to sanitize. This combination of material, manufacturing, and surface treatment makes the pipe ideal for hygienic environments.
Key Features
- Superior Material: 316L stainless steel (UNS S31603) offers enhanced resistance to chlorides, acids, and aggressive cleaning chemicals, minimizing contamination risks in food contact environments.
- True Seamless Construction: Manufactured without welds, providing uniform wall thickness and eliminating potential weak points where microbes could accumulate.
- Annealed and Pickled Condition: Ensures a smooth, scale-free surface that is easy to clean and reduces bacterial adhesion, which is critical for sanitary piping.
- ASTM A213 Compliance: Meets international standards for seamless austenitic alloy-steel tubes, guaranteeing traceable material properties and consistent quality.
- Optimal Dimensions: Standard DN50 (2-inch) nominal diameter and 5-meter length, easily integrated into existing process piping systems.
- Food-Grade Safety: The non-toxic, corrosion-resistant surface meets strict hygiene requirements for food, dairy, and beverage production.
Technical Specifications
| Material Grade | 316L (UNS S31603) |
| Standard | ASTM A213 |
| Nominal Diameter | DN50 (approx. 2 inches) |
| Length | 5 meters (custom lengths available upon request) |
| Manufacturing Process | Seamless |
| Heat Treatment | Annealed |
| Surface Finish | Pickled |
| Wall Thickness | Customizable (various schedules available) |
Application Industries
This versatile pipe is widely used in the following sectors:
- Food and beverage processing lines
- Dairy equipment and piping
- Brewing and distillation systems
- Pharmaceutical and sanitary systems
- Chemical transfer and CIP cleaning systems
Quality Assurance
Our manufacturing facility operates under an ISO9001 quality management system, ensuring strict control from material procurement to final inspection. Each pipe is subjected to dimensional checks, material verification, and surface examination before shipment. The annealed and pickled surface not only enhances corrosion resistance but also guarantees a clean, hygienic interior for food processing use. For added confidence, mill test certificates and material traceability documents are available upon request, and third-party inspections can be arranged to meet your project requirements.
Frequently Asked Questions
Q: What does annealed and pickled mean?
Annealing involves heating and controlled cooling to remove internal stresses and soften the material, while pickling removes oxides and scale from the surface. This results in a bright, smooth, and corrosion-resistant surface that is essential for sanitary piping in food processing.
Q: Can the pipe be customized in length and wall thickness?
Yes, we offer customization options. Standard length is 5 meters, but shorter or longer sections can be produced upon request. Wall thickness schedules are also customizable to suit different pressure and flow requirements.
Q: Is this pipe suitable for contact with food products?
316L is widely recognized as a food-grade stainless steel due to its low carbon content and excellent corrosion resistance. The smooth pickled surface minimizes bacterial growth, making it suitable for dairy, beverage, and brewing applications. However, final compliance with local food contact regulations should be verified for your specific application.
Q: What is the difference between 316 and 316L steel?
The 'L' in 316L denotes low carbon content (maximum 0.03%). Lower carbon reduces sensitization during welding, which helps maintain corrosion resistance in welded structures. For processing equipment that involves welding, 316L is often preferred over 316.
Q: Do you provide certification documents with the shipment?
Yes, mill test certificates and material certificates are available upon request. The factory operates under ISO9001 quality management, and we can provide inspection reports as well as third-party testing options.
Q: What is the lead time and how do you ship?
Standard production typically takes 7-15 days depending on order quantity. We ship from Qingdao Port, China, using reinforced export packing such as wooden crates or bundles with protective wrapping. Shipping methods include sea freight and express delivery, arranged based on destination.
Q: Can you supply other sizes or material grades?
Yes, besides DN50 in 316L, we can supply various nominal diameters, lengths, and material grades including 304, 316, 321, and duplex stainless steels. Contact our sales team with your specifications for a tailored quote.
Q: What is the minimum order quantity (MOQ)?
Our MOQ is flexible. For standard sizes in stock, we accept trial orders starting from a small quantity, while for customized dimensions, a larger minimum may apply. Please contact us to discuss your requirement.
As a trusted manufacturer from Liaocheng, Shandong, we ship from Qingdao Port to markets across North America, South America, Europe, Southeast Asia, Africa, and the Middle East. With annual exports of US$50-100 million and a team of 51-100 skilled staff, Hemaokang Steel delivers on time with competitive pricing and consistent quality. Contact us today to discuss your specific requirements, or place an order and experience dependable service for your food processing projects.
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