ISO 2037 Stainless Steel Tube Sanitary Stainless Steel Tubing For The Food Industry

Material

ISO 2037 sanitary stainless steel tubes are seamless or welded austenitic stainless steel tubes specifically designed for hygienic food-industry service. The ISO 2037 standard defines dimensions, tolerances, surface roughness and hygienic requirements for straight stainless steel tubes used in the food sector, ensuring easy cleaning and product safety.

Typical grades for ISO 2037 tubes are:

• AISI 304 / 304L (EN 1.4301 / 1.4307)

• AISI 316 / 316L (EN 1.4401 / 1.4404) – Mo-alloyed for higher corrosion resistance

• AISI 321 (EN 1.4541) – Ti-stabilized for better resistance to sensitization and high temperature service

These grades combine excellent corrosion resistance, weldability and formability, making them the standard choice for food, dairy and beverage piping.

Specifications

• Standard

  • ISO 2037:1992 “Stainless steel tubes for the food industry”

  • Regional adoptions such as BH GSO ISO 2037:2017

• Typical Steel Grades

  • AISI 304 / 304L / 316 / 316L / 321

  • EN equivalents: 1.4301, 1.4307, 1.4401, 1.4404, 1.4541

• Manufacturing Process

  • Welded or seamless tubes

  • Solution-annealed and pickled, with optional mechanical/electropolished internal surface

  • Bead-rolled or ground welds to maintain internal smoothness for hygienic service

• Dimensions (typical ISO 2037 range)

  • Outside diameter: approximately 25–101.6 mm widely used in food and beverage plants

  • Wall thickness: series according to ISO 2037 tables; common sanitary sizes around 1.5–3.0 mm (exact values depend on OD series)

• Surface Finish & Roughness

  • Internal finish typically bright-annealed and/or mechanically polished

  • Roughness: food and beverage sanitary lines commonly specify Ra ≤ 0.8 μm (32 μin) on the product-contact surface to minimize biofilm and ease cleaning.

• Tube Ends

  • Square-cut, deburred, suitable for orbital welding

  • Optional pre-assembled sanitary ferrules/clamp ends for quick installation

Main Features

1. Hygienic internal surface
   Controlled surface roughness (typically Ra ≤ 0.8 μm) and crevice-free welds reduce bacterial adhesion and support effective CIP/SIP cleaning.

2. Excellent corrosion resistance
   304/304L provide robust resistance for neutral media; 316/316L add molybdenum for stronger resistance in chloride-containing or acidic food products and cleaning chemicals.

3. Consistent dimensional tolerances
   ISO 2037 sets strict tolerances for OD, wall thickness and straightness, giving reliable fit-up with standardized clamps, fittings and valves.

4. High mechanical integrity
   Austenitic stainless steels offer high tensile strength, ductility and toughness, maintaining integrity under pressure, vibration and frequent thermal cycling.

5. Excellent weldability
   Low-carbon “L” grades (304L, 316L) and stabilized 321 minimize sensitization and intergranular corrosion in heat-affected zones, enabling reliable orbital TIG welding without post-weld heat treatment.

6. Full traceability & documentation
   ISO 2037 tubes are commonly supplied with EN 10204 3.1 material certificates, surface finish documentation and optional roughness and borescope reports, helping users meet HACCP, ISO 22000 and related food-safety regimes.

Our Advantages

1. “Is the internal surface really cleanable and hygienic enough?”

Q: Risk of biofilm, residues or contamination in product lines and CIP circuits.

Our advantage:

• We specify and control internal roughness around Ra ≤ 0.8 μm, aligned with prevailing food-industry guidance for hygienic surfaces, and offer even finer finishes on request.

• Weld seams are smoothed (bead-rolled/ground) and borescoped where required to avoid crevices and dead legs.

• Each batch can be supplied with surface-finish verification (profilometer reports or representative Ra certificates), supporting validation of your cleaning procedures.

2. “Which grade should I use, 304 or 316L, and will it survive my media and cleaning chemicals?”

Q: Pitting or stress-corrosion cracking caused by chlorides, acids, alkalis and aggressive CIP media.

Our advantage:

• We provide application-driven material selection:

  • 304 / 304L for general dairy and low-chloride, neutral media.

  • 316 / 316L for brines, sauces, fruit juices and aggressive CIP/SIP regimes.

  • 321 for high-temperature lines (e.g. hot oil, steam, high-temperature sterilization) where resistance to sensitization is critical.

• Technical support includes review of your media, temperature and cleaning cycles to recommend the optimum grade with appropriate corrosion margin.

3. “Can I integrate ISO 2037 tubes into a mixed-standard plant (ASTM, EN/DIN)?”

Q: Compatibility between ISO 2037 and other common sanitary tube standards such as ASTM A270, EN 10357/DIN 11850 and JIS G3447.

Our advantage:

• We supply ISO 2037 tubes with dimensions harmonized to European hygienic tube series (EN 10357 / former DIN 11850), which are widely used across EU food and beverage plants.

• Dual-compliance options (e.g. ISO 2037 + EN 10357 or ISO 2037 + ASTM A270) can be offered where design tolerances permit, simplifying integration into global projects.

• Matching hygienic fittings (bends, tees, reducers, ferrules) in ISO 2037/EN 10357 dimensions are available, ensuring leak-free transitions and standardized clamp connections.

4. “How do I know the tubes meet food-safety and quality documentation requirements?”

Q: Compliance auditing (HACCP, ISO/FSSC 22000), customer and regulatory inspections.

Our advantage:

• EN 10204 3.1 certificates with full heat traceability, chemical composition and mechanical properties.

• Optional additional testing:

  • Eddy-current or hydrostatic testing of welds

  • Borescope inspection of internal surface

  • Roughness measurement reports on representative samples

• Clear cross-reference to international standards (ISO/ASTM/EN/JIS/GB/GOST) to simplify your specification and documentation packages.

5. “Can I get the tube in the exact lengths and fabrications my project needs?”

Q: Installation cost, welding time on site, and layout complexity.

Our advantage:

• Wide stock range in common OD and wall combinations under ISO 2037/EN 10357 series with short delivery times.

• Cut-to-length supply, pre-fabricated spools, U-bends and manifolds to reduce field welding.

• Technical support for routing, slope (for drainage), and drainability to help you design hygienic piping systems with minimal dead legs.

Chemical Composition 

Mechanical Properties

Applicable Standards

While ISO 2037 is the primary product standard, equivalent or related standards in other systems include:

• ISO

  • ISO 2037:1992 – Stainless steel tubes for the food industry

• ASTM (USA)

  • ASTM A270 – Seamless and welded stainless steel sanitary tubing for dairy and food industry service

  • ASTM A269 – Seamless and welded austenitic stainless steel tubing for general service

  • ASTM A249 – Welded tubes specification frequently referenced for additional mechanical/bend tests on sanitary tubing

• EN / DIN (Europe)

  • EN 10357 (formerly DIN 11850) – Welded stainless steel tubes for food, chemical and related industries

• GOST (Russia & CIS)

  • GOST 9941 – Seamless cold-formed pipes made of corrosion-resistant high-alloy steel, used as the stainless tube basis in high-purity and pressure systems, including food-related applications

• JIS (Japan)

  • JIS G3447 – Stainless steel sanitary pipes for dairy and food industry service

• GB (China)

  • GB/T 12771 – Welded stainless steel pipes for fluid transport, commonly used for food and beverage piping in conjunction with specific sanitary requirements

  • Related: GB/T 14975 and GB/T 14976 for seamless stainless steel pipes

Our ISO 2037 tubes can be selected and documented to align with these frameworks, allowing easy specification in international food and beverage projects.

Application Fields

General

ISO 2037 sanitary stainless steel tubes are used wherever food, beverage or related products must be processed, transported or cleaned in a hygienic, corrosion-resistant pipeline system. Stainless steel’s combination of cleanability, durability and corrosion resistance makes it the dominant material for food-contact pipework.

Typical Industry Uses and Line Functions

1. Dairy & Dairy Ingredients

   • Raw milk reception and transfer lines

   • Pasteurization and UHT systems

   • Cream, whey, lactose and concentrated milk pipelines

   • CIP return/supply lines and cleaning manifolds

2. Beverage, Brewery & Soft Drinks

   • Brewing lines (wort, beer, filtration and bright beer transfer)

   • Carbonated drink and juice concentrate lines

   • Syrup, flavor and blending manifolds

   • CO₂-contact and carbonation loops where hygienic design is essential

3. Fruit, Vegetable & Sugar Processing

   • Juice, puree and concentrate transfer

   • Sugar syrup and liquid sweetener distribution

   • Acidic product and flavor lines where 316L is preferred for pitting resistance

4. Meat, Poultry, Seafood & Ready Meals

   • Brine and marinade injection circuits

   • Cooking, chilling and scalding system piping

   • Washdown and cleaning distribution lines

5. Edible Oils, Fats & Sauces

   • Refined oil and fat transfer

   • High-viscosity sauces, dressings and condiments

   • Hot filling and high-temperature sterilization sections, often using 321 or 316L

6. Utilities & Process Support

   • Process water, purified water and condensate return

   • Steam distribution and condensate lines (with appropriate high-temperature grades)

   • CIP and SIP circuits (alkaline and acidic cleaning solutions, sanitizers)想·

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

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A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

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