Stainless Steel 304 / 304L Capillary Tubes SS 304 / 304L Capillary Tubes, 304 / 304L Stainless Steel Capillary Tube Manufacturer, SS 304 / 304L Capillary Tube Supplier, SS 304 / 304L Capillary Tube Exporter, Stainless Steel 304 / 304L Precision Tubing, SS 304 / 304L Small Diameter Tube ,SS 304 / 304L Instrumentation Tubes
Sumer Metal Industries Private Limited, based in Mumbai, is an ISO 9001:2015‑certified manufacturer, supplier, stockist, and exporter of stainless steel products, including capillary tubes of SS 304/304L grade sumermetal.in . Though primarily known for sheets, plates, coils, and pipes, their product range also extends to high‑quality stainless steel tubes, offering global delivery with a robust supply and inspection infrastructure.
Their stainless steel 304/304L pipes and tubes are exported to a wide array of countries. These include key Middle Eastern markets such as Oman, Qatar, Saudi Arabia, the UAE, and Kuwait; European nations including Spain and Germany; North America (the USA, Canada); and numerous regions across Africa.
Sumer Metal’s SS 304/304L capillary tubes adhere to ASTM/ASME standards, such as A312 and A358 (pipes), and ASTM A213 (tubes) Exporters India jayeshmetal.com . Dimensional offerings span from very small OD (capillary) up to large nominal sizes. They can produce tubes in various forms (round, rectangular, hex, hydraulic, honed), with fabrication methods including seamless, ERW, welded, CDW, and 100% X‑ray welded. Available schedules range from SCH 5 to XXS and XS, with finishes like No. 1, 2B, No. 4, or No. 8 mirror finish; delivery options include annealed & pickled, bright annealed, or cold-drawn.
Sumer Metal emphasizes durable construction, corrosion resistance, excellent formability and weldability in their SS 304/304L tubes, offered competitively Exporters India . They support value‑added services including cutting, beveling, polishing, threading, and both destructive/non‑destructive testing with third‑party or NABL‑approved lab reports Exporters India . Packaging is customized—wooden boxes, plastic-strip bundling, etc.—to ensure safe export delivery
Specification of Stainless Steel 304 / 304L Capillary Tubes
| Property | Details |
|---|---|
| Grades | Stainless Steel 304 / 304L |
| Standards | ASTM A213 / ASTM A269 / ASTM A632 / EN 10216-5 / JIS G3463 |
| Dimensions (Outer Diameter) | 0.3 mm to 6.35 mm |
| Wall Thickness | 0.08 mm to 1.50 mm |
| Length | Up to 30 meters (coiled or straight length available) |
| Manufacturing Process | Seamless / Welded / Cold Drawn / Bright Annealed |
| Surface Finish | Bright Annealed, Polished, Pickled, BA, 2B, Mirror |
| Form | Round, Square, Rectangular, Coil |
| Tolerance | ±0.05 mm or as per customer specifications |
| End Finish | Plain End / Beveled End / Custom Cut Ends |
| Testing | Hydrostatic, Eddy Current, PMI, Visual & Dimensional |
| Packaging | Plastic caps, Bundled with PE sheets, Wooden box, Coil on spools or reels |
| Applications | Medical, Instrumentation, Heat Exchangers, Gas Lines, Microfluidic Systems |
Stainless Steel 304 / 304L Capillary Tubes are highly specialized components used in precision applications where tight tolerances, corrosion resistance, and durability are essential. Manufactured from the austenitic grades SS 304 and SS 304L, these tubes offer excellent mechanical strength, good weldability, and outstanding resistance to oxidation and intergranular corrosion. The low carbon content in 304L makes it particularly suitable for welding operations, reducing the risk of carbide precipitation. These capillary tubes are widely used in sectors such as medical instruments, chromatography, microfluidic systems, aerospace, and instrumentation.
Chemical Composition of Stainless Steel 304 / 304L Capillary Tubes
| Element | SS 304 (%) | SS 304L (%) |
|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.035 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 11.0 | 8.0 – 13.0 |
| Nitrogen (N) | ≤ 0.10 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance |
Sumer Metal Industries Private Limited, based in Mumbai, India, is a well-established manufacturer, supplier, and global exporter of stainless steel products, including SS 304/304L capillary tubes. With state-of-the-art manufacturing facilities and adherence to international standards such as ASTM A213, A269, and A632, the company ensures that each product meets the exact dimensional, chemical, and mechanical requirements. Sumer Metal provides options for seamless, cold-drawn, and bright-annealed finishes, delivering tubes with outer diameters as small as 0.3 mm and wall thicknesses down to 0.08 mm.
Specification of Stainless Steel 304 / 304L Capillary Tubes
| Specification Item | Details |
|---|---|
| Material Grades | Stainless Steel 304 / 304L |
| Standards | ASTM A213, ASTM A269, ASTM A632, EN 10216-5, JIS G3463 |
| Manufacturing Type | Seamless / Welded / Cold Drawn / Bright Annealed |
| Outer Diameter (OD) | 0.3 mm to 6.35 mm |
| Wall Thickness | 0.08 mm to 1.50 mm |
| Length | Up to 30 meters (coil form), or as per custom requirement |
| Tolerance | OD: ±0.05 mm (custom tolerances available) |
| Surface Finish | Bright Annealed (BA), Polished, Pickled, 2B, Mirror Finish |
| Form | Round / Square / Rectangular / Coiled Tubes |
| End Finish | Plain End / Beveled / Custom Cut |
| Hardness | Annealed (Soft), Cold Worked (As required) |
| Testing | Eddy Current, Hydrostatic, PMI, Visual & Dimensional Inspection |
| Packaging | PE caps on ends, PE wrap, Wooden box or reels for coiled tubes |
| Applications | Medical, Instrumentation, Microfluidics, Aerospace, Gas Systems, Sensors |
🏭 Industry & Application
- ✅ SS 304 / 304L Capillary Tubes for Medical Industry
- ✅ SS 304 / 304L Capillary Tubes for Chemical Processing
- ✅ SS 304 / 304L Tubes for Instrumentation Lines
- ✅ Stainless Steel 304 / 304L Capillary Tubes for Gas & Liquid Flow
- ✅ SS 304 / 304L Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1: What makes SS 304L capillary tubes preferable for welding?
Lower carbon content (≤0.35 %) reduces carbide precipitation, improving weldability and minimizing intergranular corrosion.
Q2:Which industries benefit most from SS 304/304L capillary tubes?
Ideal for instrumentation, HVAC, medical, and microfluidic systems due to precision dimensions, corrosion resistance, and surface finish options.
Q3: Can Sumer Metal supply customized capillary tubes?
Yes—custom OD, wall thickness, forms, lengths, surface finishes, and testing options are available per client requirements.
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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