Sanitary Grade Precision Steel Tube

What is Sanitary Grade Precision Steel Tube?

The Shenchi factory Sanitary Grade Precision Steel Tube is typically made from high-quality stainless steel such as 304 or 316L, processed through cold drawing or cold rolling precision manufacturing. It features the following core characteristics:

· High internal surface finish: Inner surface roughness can reach Ra ≤ 0.4μm, even mirror-grade, preventing bacterial growth and scaling.

· No dead corners design: Uniform and dense inner/outer wall structure without cracks, scratches, or oxide scale.

· Strong corrosion resistance: 316L stainless steel contains molybdenum, offering excellent resistance to chloride corrosion.

· High dimensional accuracy: Strict tolerance control of outer diameter and wall thickness, compliant with DIN, ISO, ASTM international standards.

Product Parameters

Sanitary Pipeline Connection Principles

In pharmaceutical and food-grade clean systems, connection methods follow strict principles:

· Welding preferred: Automatic argon arc welding is used for permanent pipelines to ensure zero dead space.

· Clamp connections for removable parts: Valves, pumps, and instruments requiring maintenance use sanitary clamps.

· Avoid threaded connections: Threads are not allowed in sanitary pipelines due to contamination risks and cleaning difficulty.

· Smooth internal transition: All joints must maintain a seamless, smooth inner wall without protrusions or cavities.

Manufacturing Process

The Shenchi Sanitary Grade Precision Steel Tube is produced using high-quality stainless steel through multiple precision processes including tube preparation, cold drawing/rolling, bright annealing, pickling & passivation, inner polishing, and clean packaging.

· Dimensional accuracy: Cold drawing ensures tolerance control within ±0.05mm, far higher than standard industrial pipes.

· Inner polishing: Mechanical or electrolytic polishing achieves Ra ≤ 0.4μm mirror finish.

· Bright annealing: Performed under protective atmosphere to eliminate stress and restore corrosion resistance.

· Pickling & passivation: Forms a dense protective layer to enhance corrosion resistance.

Each batch undergoes eddy current testing, hydrostatic pressure testing, and surface cleanliness inspection, ensuring compliance with pharmaceutical, food, and semiconductor industry standards. OEM/ODM customization is fully supported.

Differences from Ordinary Steel Pipe

The Shenchi Sanitary Grade Precision Steel Tube differs significantly from standard industrial pipes:

· Material standard: Uses high-purity 304/316L stainless steel with controlled impurities, while ordinary pipes often use carbon steel with limited corrosion resistance.

· Surface finish: Mirror-polished inner wall (Ra ≤ 0.4μm), preventing scaling and bacterial growth; ordinary pipes have rough surfaces prone to contamination.

· Dimensional precision: Strict tolerance control ensures precise welding and clamp fitting; ordinary pipes often suffer from misalignment.

· Cleanliness: Produced under clean conditions with sealed packaging to prevent contamination; ordinary pipes often require acid cleaning before use.

· Corrosion resistance: 316L offers excellent chloride resistance for coastal and chemical environments; carbon steel pipes rust easily in humid conditions.

· Connection methods: Designed for hygienic clamp systems and orbital welding; ordinary pipes rely on threaded or basic welding with dead zones and leakage risks.

Shenchi provides 304, 316L, and brass material options to meet different media and working conditions. As a source factory of Sanitary Grade Precision Steel Tube in China, Shenchi strictly follows hygienic manufacturing standards to ensure every meter of tubing meets sanitary application requirements.