HAOMEI Aluminum CO., LTD.
Email:nydia@aluminumhm.com
Whatsapp:8618137889531
Wechat:+86-18137889531
Marine stainless steel seamless pipe is designed for demanding shipbuilding, offshore, and seawater service applications where corrosion resistance, pressure performance, and reliability are critical. Manufactured without a welded seam, it offers excellent structural integrity and is widely used in marine piping systems, seawater cooling lines, ballast systems, and offshore process piping.
Our marine stainless steel seamless pipe is available in a wide range of stainless steel, duplex, and super duplex grades to meet different service conditions. Compared with welded pipe, seamless pipe provides improved strength uniformity and dependable performance under pressure, making it suitable for marine environments exposed to saltwater, humidity, and aggressive chloride conditions.
We can supply seamless pipe for marine applications in accordance with international standards and project specifications, with full material traceability and inspection documentation available upon request.
Excellent corrosion resistance in marine and chloride-containing environments
Seamless construction for improved pressure performance and reliability
Available in austenitic, duplex, and super duplex stainless steel grades
Suitable for shipbuilding, offshore, and seawater systems
Full traceability and inspection documentation available
Third-party inspection and project-specific certification support
Specifications of Marine Stainless Steel Seamless Pipe:
Product Name | Marine Stainless Steel Seamless Pipe |
Manufacturing Process | Seamless |
Material Grades | 304/304L, 316/316L, 321, 2205, 2507, etc. |
Outer Diameter | 6 mm – 630 mm |
Wall Thickness | 1 mm – 40 mm |
Length | Random length or fixed length |
Surface Finish | Annealed, pickled, polished, as required |
Ends | Plain end, beveled end, as required |
Marking | Standard marking or customized marking |
Packaging | Bundles, wooden cases, seaworthy export packing |
Available Grades of Marine Stainless Steel Seamless Pipe:
We can supply marine stainless steel seamless pipe in the following common grades:
304 / 304L
316 / 316L
321
310S
Duplex 2205
Super Duplex 2507 (UNS S32750 / S32760)
Other stainless steel grades upon request
Standards of Marine Stainless Steel Seamless Pipe:
Marine stainless steel seamless pipe can be supplied according to the following standards, depending on grade and application:
ASTM A312
ASTM A213
ASTM A789
ASTM A790
EN 10216-5
Other international standards upon request
What We Offer?
Experience in stainless steel pipe supply for marine and industrial applications
Wide range of grades and standards available
Support for third-party inspection and project documentation
Reliable quality control and traceability
Flexible supply for standard and customized orders
Fast response for quotations and technical inquiries
Application of Marine Stainless Steel Seamless Pipe:
Our marine stainless steel seamless pipe is widely used in:
Shipbuilding piping systems
Seawater cooling systems
Ballast and bilge systems
Offshore platforms and marine structures
Desalination and water treatment systems
Hydraulic and instrumentation tubing
Heat exchangers and condensers
Marine process piping
Inspection & Certificates of Marine Stainless Steel Seamless Pipe:
To meet the requirements of marine and offshore projects, the following documents and inspections can be provided depending on the order:
Mill Test Certificate (MTC)
EN 10204 3.1 certificate
EN 10204 3.2 certificate
PMI report
Chemical composition report
Mechanical test report
Hydrostatic test report
NDT / inspection reports
Third-party inspection
Project-specific documentation upon request
Packaging & Delivery:
Marine stainless steel seamless pipe is packed in seaworthy export packaging to ensure protection during transportation and storage. Standard packing methods include bundled packing, wooden cases, end caps, labeling, and moisture protection. Customized packing and marking can also be arranged according to project requirements.
FAQs:
Seamless pipe is preferred for many marine applications because it has no welded seam, which helps provide more uniform strength and stable performance under pressure. It is widely used in critical piping systems that operate in harsh marine environments.
A: Yes, stainless steel seamless pipe can be used in seawater service if the proper material grade is selected. Grades such as 316L, Duplex 2205, and Super Duplex 2507 are commonly used for chloride-containing marine environments.
A: Common grades include 304, 304L, 316, 316L, 321, Duplex 2205, and Super Duplex 2507. Other grades may also be available depending on the application and specification requirements.
A: 316L offers good general corrosion resistance and is widely used in marine applications. Duplex 2205 provides higher strength and better resistance to pitting and crevice corrosion than 316L. Super Duplex 2507 offers even better corrosion resistance and is suitable for more aggressive seawater conditions.
A: Our marine stainless steel seamless pipe can be supplied according to standards such as ASTM A312, ASTM A213, ASTM A269, ASTM A790, and EN 10216-5, depending on the grade and application.
An: Available sizes depend on the grade, standard, and project requirements. We can generally supply various outer diameters, wall thicknesses, and lengths, including random lengths and cut-to-length options.
A: Common surface finishes include annealed and pickled, bright annealed, and other finishes as required. End types usually include plain ends and beveled ends. Customized end preparation may also be available.
A: We can provide Mill Test Certificate (MTC), EN 10204 3.1 certificate, EN 10204 3.2 certificate, PMI reports, chemical composition reports, mechanical test reports, hydrostatic test reports, and other inspection documents upon request.
A: Typical applications include shipbuilding piping systems, seawater cooling systems, ballast systems, bilge systems, offshore platforms, desalination plants, heat exchangers, condensers, and other marine process piping systems.
A: The pipes are usually packed in seaworthy export packaging such as bundles, wooden cases, end caps, labels, and moisture-protection wrapping. Customized packing and marking are also available.
A: To get a quotation, please provide the material grade, standard, size, wall thickness, length, quantity, application, certificate requirements, and destination port. This helps us prepare an accurate offer quickly.
