EN10216-5 D2/T1 1.4404 316L Low Carbon Stainless Steel Seamless Tube

EN10216-5 D2/T1 1.4404 316L Low Carbon Stainless Steel Seamless Tube​

EN 10216-5 1.4404 stainless steel pipe is a low-carbon austenitic stainless steel seamless pipe (corresponding to 316L), with chromium (16.5-18.5%), nickel (10-13%), and molybdenum (2-2.5%) as the core components, with a tensile strength of ≥485 MPa and an elongation of ≥40%. Its low-carbon design (C≤0.03%) significantly reduces the risk of welding sensitization, and the molybdenum element enhances the corrosion resistance of chlorides (such as seawater and acidic media), and has a wide temperature range (-196°C to 400°C).

This pipe is widely used in the fields of chemical industry, energy and marine engineering. Typical scenarios include corrosive fluid transportation (hydrochloric acid, seawater cooling), flue gas desulfurization system pipelines and liquefied natural gas (LNG) cryogenic equipment. During manufacturing, it is solution annealed and surface passivated to optimize corrosion resistance. It is necessary to avoid being in the sensitization temperature range of 450-850°C for a long time. It is the preferred material for balancing corrosion resistance, processability and economy.

Tolerances on outside diameter D and wall thickness T for tubes ordered hot-finished

Tolerances on outside diameter D and wall thickness T for tubes ordered cold-finished

Testing and Compliance

Mandatory Tests:Hydrostatic testing, non-destructive testing (ultrasonic/eddy current), mechanical tests (tensile, hardness, impact), and chemical analysis.
Certification:Compliance with EN10216-5 ensures quality for critical applications.

EN10216-5 UNS32205 seamless tubes are engineered for demanding environments where corrosion resistance and mechanical strength are paramount. Their compliance with stringent European standards guarantees performance in high-pressure, corrosive settings across industries like energy and chemical processing.

Applications

1. Chemical and petrochemical industry

Corrosive media transportation: Pipeline systems for hydrochloric acid, phosphoric acid, and chloride ion solutions (such as seawater coolants). Molybdenum (2-2.5%) effectively resists pitting and crevice corrosion.

Reactor lining and heat exchange tubes: In acidic or alkaline reaction environments, they can withstand high temperatures (≤400°C) and pressure fluctuations to ensure equipment sealing.

2. Marine and ship engineering

Seawater desalination equipment: High-pressure reverse osmosis (RO) pipelines resist corrosion from high-salinity seawater and extend equipment life.

Ship ballast water system: Prevents biological attachment and salt spray erosion, meeting IMO anti-pollution standards.

Marine platform structure: Deck support pipes and fire hoses are suitable for humid and salt spray environments.

3. Energy and environmental protection fields

Flue gas desulfurization (FGD) system: Spray pipes and internal components of absorption towers are resistant to sulfuric acid dew point corrosion and chloride ion erosion.

Liquefied Natural Gas (LNG) Facilities: Low temperature (-196°C) pipelines, austenitic structure to avoid cold brittle fracture.

Nuclear power plant auxiliary system: Secondary non-radioactive cooling water pipes, meeting the cleanliness requirements of nuclear grade materials.

4. Food and pharmaceutical industry

High clean fluid transportation: pipelines for dairy products, beverages, and pharmaceutical raw materials, with surface polishing to Ra≤0.8μm, in line with FDA and EHEDG hygiene standards.

Aseptic filling system: Avoid metal ion contamination, and the material passes biocompatibility testing (such as ISO 10993).

5. Medical and scientific research equipment

Medical gas pipelines: Oxygen and nitrogen delivery systems to ensure non-toxic release.

Cryogenic laboratory equipment: Liquid nitrogen and liquid helium storage and transportation pipelines to maintain ductility at extremely low temperatures.