Stainless steel seamless precision pipe
1.High Precision,Ultra-Smooth,Corrosion Resistant,Custom Sizes
- Tolerance: ±0.02mm (Min)
- Surface Finish: Ra 0.2μm (ID) / Ra 0.4μm (OD)
- Materials: 304/304L/316/316L/321/2205/2507/904L
- Standards: ASTM A269/A270, EN10305-1, BPE
2.Product Overview
Our precision seamless stainless steel tubes are manufactured via cold drawing / cold rolling + bright annealing (BA) / electrolytic polishing (EP), with no welds, strict dimensional tolerance, ultra-clean inner & outer surfaces. Ideal for high-purity fluid transfer, precision instrumentation, hydraulic systems, food & beverage, pharmaceutical, semiconductor and high-end mechanical engineering.
- ✅ Zero Weld Defects
- ✅ Ultra-Precise Dimensional Control
- ✅ Mirror-Like Surface Finish
- ✅ High Corrosion & Pressure Resistance
- ✅ Full Traceability & Compliance
- ✅ Custom Lengths & Fabrications
3.Materials & Standards
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MATERIAL
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KEY ELEMENTS
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TYPICAL APPLICATION
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|---|---|---|
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304 (S30400)
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Cr 18-20%, Ni 8-10.5%
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General industry, instrumentation, decoration
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304L (S30403)
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Low C ≤0.03%
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Welded components, corrosive environments
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316L (S31603)
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Mo 2-3%, Low C
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Food, pharma, marine, chloride resistance
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- ASTM: A312,A269, A270, A511, A213
- ASME: BPE (Bioprocessing Equipment)
- EN: 10216-5, 10305-1
- DIN: 17456, 17458
- ISO: 1127
4.Technical Parameters
(1)Size Range
- Outer Diameter (OD): φ3mm – φ159mm
- Wall Thickness (WT): 0.5mm – 12mm
- Length: 1000mm – 12000mm (fixed length available)
- Tolerance: OD ±0.02mm~±0.05mm; WT ±0.05mm~±0.1mm
- Straightness: ≤0.5mm/m
- Roundness: ≤0.03mm
(2)Surface Finish
- BA (Bright Annealed): Bright, clean, oxide-free, Ra ≤0.4μm
- EP (Electropolished): Mirror-like, ultra-smooth, Ra ≤0.2μm
- AP (Annealed & Pickled): Matte, corrosion-resistant
- Polished: 180# – 600# (brush / mirror)
(3)Mechanical Properties
- Tensile Strength: ≥520MPa (316L)
- Yield Strength: ≥205MPa (316L)
- Elongation: ≥40%
- Hardness: ≤HB 180
- Pressure Rating: Up to 400 bar (depends on size)
5.Manufacturing Process,Production & Quality Control
- Raw Material (Prime Stainless Steel Billets)
- Piercing / Extrusion
- Cold Drawing / Cold Rolling
- Heat Treatment (Bright Annealing / Solution)
- Precision Straightening
- Cutting & Deburring
- Ultrasonic Cleaning / Degreasing
- Dimensional & Non-Destructive Testing (UT/ET/Hydro)
- Packaging & Marking
6.Industries & Applications
- Pharmaceutical & Biotechnology: Clean steam, pure water, sterile transfer (BPE compliant)
- Food & Beverage: Dairy, brewing, edible oil, sanitary piping
- Semiconductor & High Purity Gas: Ultra-clean gas lines, UHP fluid systems
- Hydraulic & Instrumentation: Precision instrumentation, control panels, hydraulic lines
- Automotive & Aerospace: High-pressure lines, engine components, precision parts
- Chemical & Petrochemical: Corrosive fluid transfer, heat exchangers
7.Quality Assurance & Certifications
- Full Material Test Reports (MTR) per EN 10204-3.1
- ISO 9001:2015
- PED 97/23/EC (Pressure Equipment Directive)
- FDA (Food Contact)
- BPE (Bioprocessing)
- TUV / SGS Test Reports
- Hydrostatic / Eddy Current / Ultrasonic Testing
8.Custom Fabrication & Solutions
- Custom Sizes (OD/WT/Length)
- Cutting to Exact Length
- Deburring / Chamfering
- Flaring / Swaging / Reducing
- Bending (Cold / Hot)
- Laser Marking (Part Number / Lot / Heat No.)
- Special Packaging (Anti-Rust Oil / Vacuum / Wooden Case)