Founded in 2006, SMLSCO is a globally leading stockist and solution provider of stainless steel piping systems. We specialize in the global supply of seamless pipes, seamless tubes, fittings, and flanges. With over 3,000 metric tons of ready stock and a 10,000 m² professional warehouse center, SMLSCO is committed to delivering cost-effective products to stockists and distributors worldwide.
Backed by PED, ISO, and AD2000 certification systems, every product from SMLSCO is fully traceable in quality. We are your long-term, reliable industrial partner.

| Attribute | Value |
|---|---|
| Product | Polished Seamless Tube (ASTM A269) |
| Material Grade | TP304L (UNS S30403) |
| Outside Diameter | 1/4" – 2" |
| Wall Thickness | According to customer requirements |
| Standard Spec | ASTM A269 / ASME SA269 / EN 10216-5 |
| Surface Finish | Bright Annealed / Polished |
| Length | 6 Meters (or Fixed Length) |
| Inspection | 100% Eddy Current Test / PMI / Dimension Check |
ASTM A269 TP304L 12mm precision polished tubes are widely used in industrial sectors that demand extremely high fluid purity and dimensional accuracy. Thanks to their excellent corrosion resistance and smooth inner surface, these tubes are commonly applied in instrumentation tubing systems for biopharmaceutical, semiconductor manufacturing, and fine chemical industries.
In addition, 12mm polished tubes are also suitable for high-end heat exchangers, food & beverage processing equipment, and hydraulic and pneumatic systems, providing long-term, stable fluid transfer solutions. They effectively prevent media adhesion and cross-contamination, ensuring system safety and operational reliability.
A1: As a professional stockist, SMLSCO offers flexible MOQ support for standard stock sizes such as 12mm. Whether for small-batch replenishment or full-pallet orders, we leverage our 3,000-ton inventory to complete shipment within 2 weeks.
A2: Both LCL and FCL shipments are packed in plywood cases. Each tube is individually wrapped in a plastic sleeve, with plastic protective caps fitted on both ends to prevent damage and contamination during transportation.
A3: Yes. SMLSCO adheres to a transparent process and conducts 100% re-inspection of tube dimensions, quantities, and surface finish prior to shipment. Upon request, we can provide inspection photos or videos for each batch, giving you full confidence in both delivery schedule and product quality.
