High/Ultra-High Cleanliness BA/EP Stainless Steel Tube
- Grade: TP304/304L, TP316/316L, TP317, TP321, TP347, TP348, S31254, S30600, S32654, N08904
- Tube OD: 4-127mm
- Tube WT: 0.4-12.7mm
- Length: 1000-12000mm
- Type: Seamless & Welded
- Delivery Condition/Surface Finish: BA (Bright Annealed), EP (Electrochemically Polished)
Features
High/Ultra-High Cleanliness BA/EP Stainless Steel Tube
Golden Sunbird Metals offers high and ultra-high cleanliness BA/EP stainless steel tubes designed for critical applications where surface purity, corrosion resistance, and process reliability are essential. Manufactured with bright annealed (BA) or electropolished (EP) finishes, these stainless steel tubes provide exceptionally smooth internal surfaces, reduced particle retention, and excellent cleanliness performance for demanding industries such as semiconductors, pharmaceuticals, biotechnology, laboratory systems, and high-purity gas delivery. With strict dimensional control, stable mechanical properties, and outstanding resistance to contamination, our BA/EP stainless steel tubes help ensure safe, efficient, and consistent fluid and gas transport in sensitive environments. Whether you need tubing for ultra-clean process lines or high-performance industrial systems, Golden Sunbird Metals supplies premium stainless steel tube solutions that meet stringent quality requirements and support long-term dependable operation.
- BA (Bright Annealed) tubes provide a smooth, clean, and bright surface for high-purity service.
- EP (Electropolished) tubes deliver an even lower surface roughness and superior cleanliness for ultra-high-purity applications.
High/Ultra-High Cleanliness BA/EP Stainless Steel Tube Chemical Composition (wt.%)
| Grade | UNS | C, max (%) | Mn, max (%) | Si, max (%) | P, max (%) | S, max (%) | Cr (%) | Ni (%) | Mo (%) | N (%) |
| TP304 | S30400 | 0.08 | 2 | 0.75 | 0.045 | 0.03 | 18.0-20.0 | 8.0-11.0 | – | – |
| TP304L | S30403 | 0.03 | 2 | 0.75 | 0.045 | 0.03 | 18.0-20.0 | 8.0-12.0 | – | – |
| TP316 | S31600 | 0.08 | 2 | 0.75 | 0.045 | 0.03 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| TP316L | S31603 | 0.03 | 2 | 0.75 | 0.045 | 0.03 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – |
| N08904 | N08904 | 0.02 | 2 | 1 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.5-5.5 | 0.10-0.15 |
High/Ultra-High Cleanliness BA/EP Stainless Steel Tube Mechanical Properties (wt.%)
| Grade | UNS | Yield Strength, min (MPa) | Tensile Strength, min (MPa) | Elongation, min (%) |
| TP304 | S30400 | 205 | 515 | 40 |
| TP304L | S30403 | 170 | 485 | 40 |
| TP316 | S31600 | 205 | 515 | 40 |
| TP316L | S31603 | 170 | 485 | 40 |
| N08904 | N08904 | 220 | 490 | 35 |
Features
- Exceptional internal cleanliness for high-purity service
- Smooth, bright surface finish
- Low surface roughness for reduced particle retention
- Excellent corrosion resistance
- Tight dimensional control
- Available in seamless and welded construction
- Suitable for cleanroom, biotech, semiconductor, and instrumentation systems
- Compatible with demanding process environments
BA vs. EP Surface Finish
BA (Bright Annealed)
BA tubes are heat-treated in a controlled atmosphere to preserve a bright surface and minimize oxidation. This finish is ideal for applications that require good cleanliness, reliable corrosion resistance, and economical high-purity tubing.
Typical benefits
- Bright, smooth appearance
- Reduced surface oxidation
- Good cleanability
- Suitable for sanitary and clean process piping
EP (Electropolished)
EP tubes are finished by electropolishing to improve surface smoothness and cleanliness. This finish is preferred for ultra-clean systems where particle control, biofilm resistance, and low contamination risk are essential.
Typical benefits
- Ultra-smooth internal surface
- Lower roughness
- Better particle control
- Enhanced cleanability
- Ideal for ultra-high-purity systems
Technical Specifications
| Item | Specification |
| Product Name | High/Ultra-High Cleanliness BA/EP Stainless Steel Tube |
| Standard | ASTM A213, ASTM A249, ASTM A268, ASTM A269, ASTM A312, EN 10216-5, EN 10217-7 |
| Grade | TP304/304L, TP316/316L, TP317, TP321, TP347, TP348, S31254, S30600, S32654, N08904 |
| Manufacturing Process | Hot Finished, Cold Finished, Welded |
| Seam Type | Seamless, Welded |
| Dimension | Tube OD: 4-127mm Tube WT: 0.4-12.7mm |
| Length | 1000-12000mm |
| Delivery Condition | Bright Annealed: The annealed and pickled tube is mechanically polished to reduce the roughness of the tube wall surface and achieve a smooth and clean effect. Inner/Outer Wall Roughness: Ra≤1.0μm
Electrochemically Polished: The tube is electrochemically polished to achieve a high or ultra-high brightness, smoothness, and cleanliness of the tube wall, which can improve surface corrosion resistance. Roughness: Innter Wall Ra≤0.25μm |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Chemical analysis, Tension tests, Flaring tests, Hydrostatic tests, Air underwater pressure tests, Nondestructive electric tests |
Packing & Shipment
- Tubes are carefully cleaned, capped, and packed to protect the surface finish during handling and transportation.
- Each tube is bundled securely, wrapped with moisture-barrier material, and packed in strong wooden crates or export-worthy cases when required.
- For ultra-clean EP tubes, double-layer protective packaging and clean handling procedures are recommended to preserve internal cleanliness.
Applications
BA Stainless Steel Tubes
- Biopharmaceutical process systems
- Cleanroom piping
- High-purity gas distribution
- Laboratory and analytical systems
- Instrumentation lines
- Purified water and WFI systems
- Food and beverage processing
- Clean chemical service
- Semiconductor support piping
- Solar photovoltaic and polysilicon production
EP Stainless Steel Tubes
- Semiconductor and microelectronics gas systems
- Ultra-high-purity gas delivery
- Sterile biotech and pharmaceutical piping
- High-purity water systems
- Vacuum systems
- Critical sanitary processing
- Medical and laboratory equipment
- Ultra-clean chemical and fluid transport
