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EN 10357 stainless steel sanitary tubing is one of the main European standards for hygienic welded stainless steel tube, used to build cleanable and sterilisable piping systems. It is based on austenitic stainless steels according to EN 100882, most commonly 1.4301 (304) and 1.4404 (316L), covering both general food and beverage service and more corrosive cleaning conditions. The Series A dimensional range spans DN10 to DN300, with standardized outside diameter and wall thickness combinations and typical wall thickness tolerance around ±10%. Internal surfaces can be pickled, mechanically polished or electropolished, with roughness values typically Ra ≤ 0.8 μm, helping to reduce product residue and improve cleanability, making EN 10357 a solid basis for stainless steel sanitary tube selection.

EN 10357 stainless steel sanitary pipe is widely used in pharmaceutical and biotech, dairy processing, brewery and beverage, food production, personal care and fine chemicals. These industries demand high levels of hygiene and microbial control and often rely on frequent CIP/SIP cleaning and sterilization. Thanks to its standardized dimensions, smooth internal surfaces and good compatibility with EN / DIN sanitary fittings and valves, EN 10357 sanitary tubing helps minimize product holdup and biofilm formation, simplifies engineering design and maintenance, and is a common choice for modern hygienic piping systems.

EN 10357 stainless steel sanitary tubing is produced from 1.4301 (304) and 1.4404 (316L) coils with full heat number traceability and EN 100882 compliance. Forming, welding and solution annealing follow controlled procedures to ensure consistent outside diameter, wall thickness and weld quality. Dimensional tolerances and surface condition are regularly monitored so that the sanitary tube meets EN hygienic piping requirements.

Each batch of EN 10357 sanitary tubing undergoes dimensional and visual inspection, including checks on OD, wall thickness, straightness and weld appearance. According to project requirements, additional hydrostatic tests and/or eddycurrent tests can be performed to verify weld integrity and confirm leaktight performance in service. Mill test certificates (MTC) and test reports can be provided for documentation and validation.

The inner surface of EN 10357 sanitary tube is treated by pickling and passivation and/or mechanical polishing, with electropolishing available for higher purity applications. Typical internal roughness is Ra ≤ 0.8 μm, and lower values (e.g. Ra ≤ 0.6 μm) can be supplied as required. Smooth internal surfaces with wellblended weld seams help reduce product holdup and make CIP/SIP cleaning and sterilization more effective.

• 4301 (304): suitable for many standard food and beverage applications with moderate corrosion conditions; a costeffective choice for general sanitary pipework.
• 4404 (316L): lowcarbon, Moalloyed stainless steel with improved resistance to chlorides and aggressive cleaning agents; preferred for dairy, pharmaceutical, biotech and highend beverage processes.

With standardized OD and wall thickness combinations (especially in Series A), EN 10357 sanitary tubing fits EN/DINtype hygienic fittings, unions and valves with minimal adaptation. This dimensional compatibility simplifies piping design, supports orbital welding and reduces the need for special transition pieces in Europeanstyle hygienic piping systems.

Each sanitary tube is protected with plastic end caps and wrapped in plastic film to prevent dust, moisture and mechanical damage. Tubes are bundled and secured with straps, and can be packed in wooden cases or on wooden pallets for safe sea and land transport. Bundles are clearly labeled with size, material grade, EN 10357 series and heat number to ensure easy identification and full traceability.