Home > Welded Tubes > ASTM A270 / SA270
In pharmaceutical, biotech, food, dairy, beverage, RO/DI water systems and cosmetic industries, the tubing must ensure:
This is where ASTM A270 / ASME SA270 stainless steel tubes are the global standard.
INOX STEEL INDIA supplies Bright Annealed (BA), Mechanically Polished (MP), and Electropolished (EP) tubes with precision fabrication and hygienic packaging. These tubes support modern high-purity systems that demand performance, consistency, and sterility.
ASTM A270 tubes are austenitic stainless-steel sanitary tubes designed specifically for:
They are widely used in FDA, 3A, and EHEDG-compliant piping systems due to their smooth ID, corrosion resistance, and cleanliness.
1. Ultra-Smooth Internal Surface (Low Ra Value)
To prevent bacterial growth and ensure product purity, the internal surface must be extremely smooth. INOX offers:
2. 316L Grade for High-Purity & Corrosion-Sensitive Applications
316L is the preferred grade for:
3. Weld Bead Rolled for Clean, Crevice-Free ID
Sanitary tubing requires the weld bead to be completely fused and smoothed. INOX ensures:
4. Compatible with Orbital Welding & Hygienic Fittings
A270 tubes are designed to integrate with:
Category: Stainless Steel Sanitary & Pharmaceutical Tubing
Grades: 304 • 304L • 316 • 316L
Finishes: BA • EP (Electropolished) • MP (Mechanically Polished)
Brand: INOX STEEL INDIA
| Section | Parameter | Technical Specification — ASTM A270 / SA270 Tubes |
|---|---|---|
| Standard | Specification | ASTM A270 / ASME SA270 — Welded/Seamless Austenitic Stainless Steel Sanitary Tubing |
| Primary Use | Food, dairy, beverage, bioprocess, pharmaceutical & sterile process applications | |
| Grades | Austenitic Stainless Steel | 304, 304L, 316, 316L (316L preferred for pharma CIP/SIP) |
| Finishes | BA (Bright Annealed) | Smooth ID/OD finish for hygienic flow |
| MP (Mechanical Polish) | 180 / 240 / 320 / 400 grit | |
| EP (Electropolished) | Ra ≤ 0.4 μm (Mirror finish for pharma/biotech) | |
| Surface Roughness (Ra) | BA | 0.6 – 0.8 μm |
| MP | 0.4 – 0.6 μm | |
| EP | ≤ 0.4 μm (standard for pharma/bioprocess) | |
| Dimensional Range | OD | 1/2” – 6” (12.7 mm – 152.4 mm) |
| Wall Thickness | 0.8 – 3.0 mm | |
| Length | 1–6 meters (custom lengths available) | |
| Manufacturing Process | Welded Sanitary Tubes | TIG welded + ID bead rolled + BA/EP finish |
| Seamless | Available on request for ultra-high purity | |
| Weld Integrity | Weld Bead | Completely fused, bead rolled, smooth ID |
| ID Purge System | 100% argon for contamination-free welding | |
| Chemical Composition | 304/304L | Cr 18–20%, Ni 8–11%, C ≤ 0.03–0.08% |
| 316/316L | Cr 16–18%, Ni 10–14%, Mo 2–3%, C ≤ 0.03–0.08% | |
| Mechanical Properties | Tensile Strength | 485–515 MPa |
| Yield Strength | 170–205 MPa | |
| Elongation | ≥ 35% | |
| Testing Requirements | Mandatory | Hydrostatic, Eddy Current, Visual, Dimensional |
| Optional | Surface Roughness (Ra), PMI, IGC, Cleanliness test, Boroscope inspection | |
| Sanitary Standards Compliance | ASTM A270 | USFDA, 3A, ISO 2037 compatible |
| End Finishing | Tube Ends | Plain / Beveled / Polished / Cleanroom Packed |
| Packaging | Double-bag sterile packaging (pharma) | |
| Applications | Industries | Pharma, biotech, food, dairy, beverage, RO/DI water, cosmetic, CIP/SIP |
| HSN Code | Stainless Steel Tubes | 73064000 |
| Grade | Best For | Key Advantages |
|---|---|---|
| 304/304L | General food, beverage, dairy | Economical, hygienic, good corrosion resistance |
| 316/316L | Pharma, biotech, CIP/SIP, WFI | Molybdenum increases pitting resistance |
| 316L (EP) | Biopharma, sterile water, medical | Ultra-low Ra, highest purity |
👉 For pharma & biotech, always choose 316L EP.
👉 For food/dairy, 304/304L BA or MP is sufficient.
Pharmaceutical & Biotech
Food & Dairy
Cosmetics & RO/DI
| Outside Diameter (OD) | Wall Thickness (WT) | Typical Application |
|---|---|---|
| 1/2” (12.7 mm) | 0.80 – 1.65 mm | Lab systems, sample lines |
| 3/4” (19.05 mm) | 0.80 – 1.65 mm | Hygienic transfer piping |
| 1” (25.4 mm) | 1.00 – 2.00 mm | Dairy, beverage, cosmetic lines |
| 1.5” (38.1 mm) | 1.20 – 2.00 mm | CIP/SIP high-purity lines |
| 2” (50.8 mm) | 1.20 – 2.50 mm | Biopharma product-contact lines |
| 2.5” – 6” | 1.20 – 3.00 mm | Large sanitary manifolds |
Lengths: 1m • 3m • 6m | End Finish: Plain, orbital weld-ready, ID/OD cleaned & capped
| Finish | Ra Value (µm) | Applications |
|---|---|---|
| Bright Annealed (BA) | 0.6 – 0.8 | Food, beverage, dairy, cosmetics |
| Mechanically Polished (MP) | 0.4 – 0.6 | Mid-level pharma, clean fluid transport |
| Electropolished (EP) | ≤ 0.4 (mirror) | High-purity pharma, biotech, WFI |
| Property | 304/304L | 316/316L |
|---|---|---|
| CIP (Chemical Cleaning) | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| SIP (Steam at 121–140°C) | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Chloride Resistance | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Exposure | 304/304L | 316/316L |
|---|---|---|
| Organic acids | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Dairy / enzymes | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Cleaning chemicals (NaOH) | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
Sanitary tubes must:
Mandatory Tests
Optional High-Purity Tests
| Property | A270 (Sanitary/Pharma) | A269 (Instrumentation) | A249 (Heat Exchanger) |
|---|---|---|---|
| ID Cleanliness | ⭐⭐⭐⭐⭐ (Highest) | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Ra Value | ≤ 0.4–0.8 | 0.6–1.0 | 0.8–1.2 |
| Polished Finish | BA/MP/EP | BA/Polish | BA |
| Requirement | INOX Recommends | Reason |
|---|---|---|
| High-purity pharma/WFI | 316L Electropolished (EP) | Ra ≤ 0.4 µm, highest hygiene |
| Food/dairy/beverage | 304L / 316L Bright Annealed | Clean, smooth, hygienic |
| Cosmetic & personal care | 316L MP / EP | Resistance to chemicals & acids |
| Grade | Finish | Indicative Price (INR/Kg) | USD/Kg |
|---|---|---|---|
| 304/304L BA | BA | ₹ 300 – ₹ 420 | $4 – $5.5 |
| 316/316L BA | BA | ₹ 380 – ₹ 550 | $5.5 – $7.5 |
| 316L MP | Polished | ₹ 420 – ₹ 650 | $6 – $9 |
| 316L EP | Electropolished | ₹ 520 – ₹ 850 | $7 – $11 |
1. Electropolished (EP) Tubes with Ra ≤ 0.4 μm — Pharma-Grade Finish
INOX is among the few suppliers delivering mirror-finish EP tubes for:
2. Hygienic Welds — ID Bead Rolled & Orbital Weld Compatible
For sanitary tubes, the weld zone is the most critical area. INOX ensures:
3. Full Traceability & Documentation — Pharma Audit Ready
Every batch includes:
4. Sanitary Tubes for Multiple High-Purity Industries
Pharmaceutical
Biotech
Food & Dairy
Cosmetics
Water Treatment
Standard Packaging
Pharma-Grade Packaging
Export Packaging
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
steel@inoxsteelindia.in
+91 9930796690
Superior corrosion resistance, better weldability, stability during CIP/SIP. Yes — EP tubes with Ra ≤ 0.4 µm are our speciality. Yes — all A270 tubes are manufactured for orbital weld compatibility. Yes — major markets include GCC, Europe & Africa. What is the difference between BA, MP, and EP tubes?
Why is 316L preferred for pharma?
Do you supply A270 electropolished tubes?
Are the tubes compatible with orbital welding?
Do you export sanitary tubes?
INOX STEEL INDIA supplies ASTM A270 / SA270 sanitary and pharmaceutical stainless-steel tubes in 304/304L/316/316L with BA, MP & electropolished (EP) finishes. Ra ≤ 0.4 μm, hygienic welds, CIP/SIP compatible, FDA & 3A compliant. Exporter to GCC, Europe, Africa & Asia.