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Bright Annealed Tubes

Bright Annealed Tubes (ASTM A269 BA Finish) – Manufacturer & Supplier in India

Super-Clean, Precision Stainless Steel Tubes for Instrumentation, Pharma, Food, High-Purity & Clean Processing Lines
Inox Steel India

Inox Steel India is a leading manufacturer, stockist, and exporter of Bright Annealed Stainless Steel Tubes produced according to ASTM A269 with BA (Bright Annealed) finish.

These tubes are processed using a controlled atmosphere bright annealing furnace, delivering a mirror-smooth, scale-free, contamination-free internal & external surface.

BA (Bright Annealed) tubes are essential for industries requiring:

  • Clean, contamination-free media flow
  • Ultra-smooth internal surface
  • High corrosion resistance
  • Precise dimensional tolerance
  • High purity fluid transfer
  • Clean processing lines
  • Compatibility with compression/ferrule fittings

ASTM A269 BA tubes are used in pharma, biotech, instrumentation, semiconductor, food processing, dairy, chemical injection lines, and automotive precision systems.

Table of Contents

What Is Bright Annealed (BA) Finish?

Bright Annealing is a heat treatment process performed inside a high-purity hydrogen atmosphere furnace, ensuring:

  • No oxidation
  • No scaling
  • Mirror-bright surface
  • Low carbon contamination
  • Extremely smooth ID surface
  • High corrosion resistance

Why BA Finish Is Superior

  • Ultra-smooth internal bore
  • High purity & sanitary flow
  • Excellent formability & bendability
  • Best for ferrule/compression fittings
  • No pickling required
  • Perfect for high-precision control & instrumentation systems

Grades Supplied in ASTM A269 BA Tubes

  • SS 304 / 304L
  • SS 316 / 316L (most demanded)
  • SS 321 / 347
  • SS 316Ti (special order)

All tubes are manufactured with strict ID cleanliness and OD tolerance suitable for global instrumentation standards.

Where Bright Annealed Tubes Are Used

  • Pharmaceutical & Biotech
  • Food & Dairy Processing
  • Breweries & Beverage Lines
  • Semiconductor & Electronics
  • High-Purity Water (HPW/UPW)
  • Chemical Injection Lines
  • Analyzer Shelters
  • Gas Distribution Networks
  • Oil & Gas Instrumentation
  • Automotive Fine Fluid Lines
  • Clean Steam Distribution

Manufacturing Process — BA Tubes (ASTM A269)

1. Cold Drawing / Rolling
Ensures precise dimensions and mechanical properties.

2. Bright Annealing in Controlled Atmosphere
Hydrogen environment → bright, oxidation-free finish.

3. Pickling + Passivation
Removes any impurities, ensuring sterile internal surfaces.

4. Polishing (Optional)
ID/OD polishing for high-purity & semiconductor-grade applications.

5. NDT Testing
Ensures tubes are defect-free and suitable for high-purity flows.

Why Inox Steel India BA Tubes Stand Out

  • Ultra-smooth mirror-like ID/OD finish
  • Perfect for sterile, sanitary & high-purity applications
  • Tight OD/ID tolerance (±0.05 mm)
  • High corrosion resistance
  • Available in straight lengths & coils
  • 316L BA tubes for global pharmaceutical compliance
  • Full traceability & certification

Applications by Sector / Media / Requirement

Pharmaceutical & Biotech Applications

ApplicationMediaIndustry
Purified Water (PW/HPW)UPW / RO WaterPharma
Clean Steam LinesClean steamBiotech
CIP/SIP CircuitsCaustic, sterilantsPharma
WFI TransferWFIBio-pharma
Process SkidsLiquids & solventsAPI Manufacturing

Food, Dairy & Beverage Applications

ApplicationMediaIndustry
Milk & Dairy LinesMilk, whey, creamDairy
Beverage ProcessingJuices, syrupsFMCG
Brewery SystemsBeer, COâ‚‚ linesBeverage
Pasteurizer LinesHot water, steamFood Processing

Dimensional Range

  • Outside Diameter (OD): 6 mm – 50.8 mm
  • Wall Thickness: 0.5 mm – 3.0 mm
  • Length: Straight 6M / 12M, Coils on request
  • Finish: BA standard, EP optional
  • Tube Type: Seamless or Welded
  • Condition: Annealed

Indicative Price Range — 2025

Grade Condition Price (INR/kg) Price (USD/kg) Applications
SS 304/304LBA Finish₹260 – ₹360$3.40 – $4.70General clean applications
SS 316/316LBA Finish₹300 – ₹480$3.80 – $6.20Pharma · Instrumentation
SS 321 / 347BA Finish₹350 – ₹550$4.50 – $7.00High-temp + corrosive
ElectropolishedEP Finish₹420 – ₹680$5.50 – $8.90Semiconductor-grade

Testing & Quality Assurance

  • Tensile strength
  • Yield strength
  • Hardness
  • Clean-bore inspection
  • Passivation verification
  • ID roughness measurement
  • Eddy current test
  • Hydrostatic test
  • Pneumatic leak test
  • Dimensional & surface inspection

Engineering Notes

  • BA finish for contamination-free flow
  • BA vs EP selection based on purity
  • Compatible with Swagelok, Parker, Gyrolok, A-LOK
  • Ideal for high-purity gases & fluids
  • Excellent bending & flaring properties

Industries & Applications Served

IndustryApplications
Pharmaceutical & BiotechWFI, PW, HPW, CIP/SIP lines
Food & BeverageDairy lines, brewery pipes
Instrumentation & AutomationImpulse & analyzer lines
Semiconductor & ElectronicsUPW & clean gas distribution
Chemical & PetrochemicalHigh-purity chemical feed lines
Oil & GasPrecision control & dosing

Packaging & Export Handling

  • Clean-bore sealing
  • LDPE / HDPE wrapping
  • Anti-scratch protective film
  • Wooden pallets / boxes
  • Heat number traceability labels

Frequently Asked Questions

Q1. What is a Bright Annealed finish?
Hydrogen atmosphere annealing giving mirror-clean surface.

Q2. Which grade is best for BA tubes?
316L BA for pharma & high-purity.

Q3. Are BA tubes suitable for ferrule fittings?
Yes, perfect leak-free sealing.

Q4. Do you export BA tubes?
Yes, worldwide.

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