E-Catalogue

Small Diameter Stainless Steel Tubes — Manufacturer & Supplier in India

When precision matters down to a fraction of a millimetre, the choice of tubing becomes critical. As a trusted small diameter stainless steel tubing manufacturer based in India, we engineer high-performance SS tubes used in medical devices, aerospace instrumentation, heat exchangers, hydraulic systems, and laboratory equipment. With more than two decades of hands-on metallurgical experience, we serve OEMs across 40+ countries with consistent quality, on-time delivery, and certifications you can trust.

What are Small Diameter Stainless Steel Tubes?

Small diameter stainless steel tubes are precision-drawn SS tubes with outer diameters typically ranging from 0.20 mm to 25.4 mm (0.008" to 1"), manufactured in grades like 304, 304L, 316, 316L, 321, and 904L. They are widely used in hypodermic needles, medical catheters, thermocouple sheaths, fuel injection lines, and miniature heat exchangers due to their corrosion resistance, biocompatibility, and high strength-to-weight ratio.

Why Choose Us as Your SS Small Diameter Pipe Supplier in India

More than manufacturers we trade. Besides being one of the most sought SS small diameter pipe suppliers in India, we manufacture them too with advanced Cold drawing benches, Bright annealing Furnaces and NDT (Non-Destructive testing) labs facility to ascertain our tubes' accuracy in dimensions and metallurgical structure.

  •   ISO 9001:2015, PED 2014/68/EU, AD 2000-Merkblatt W0 certified facility
  •   Mill Test Certificates (EN 10204 3.1 / 3.2) with every consignment
  •   In-house ultrasonic, eddy current, hydro & pneumatic testing
  •   Tolerances up to ±0.02 mm OD on micro-bore tubes
  •   Same-day dispatch on standard sizes from our 600+ MT stockyard

Table of Content


Our Range as a Stockist of Stainless Steel Miniature Tubing and Tiny Metal Tubes


As a leading stockist of stainless steel miniature tubing and tiny metal tubes, we maintain a deep inventory across both imperial and metric specifications. Our miniature tubing portfolio is engineered for industries where space, weight, and precision converge.

Product Categories We Stock & Manufacture

Product TypeOD RangeWall ThicknessCommon Grades
Hypodermic Tubing0.20 mm – 6.35 mm0.05 mm – 1.00 mm304, 316L
Capillary Tubing0.50 mm – 3.00 mm0.10 mm – 0.50 mm316L, 321
Instrumentation Tubing3 mm – 25.4 mm0.5 mm – 3 mm304L, 316L
Coiled Small Diameter Tubes3 mm – 19.05 mm0.7 mm – 2.5 mm304, 316L, 825
Mirror Polished Tubes6 mm – 25.4 mm0.5 mm – 2 mm304, 316L

Hypodermic Gauge Stainless Steel Tubing — Medical-Grade Precision


Each tube of hypodermic stainless steel has burrs removed and is passivated and offered with biocompatibility documentation – each is ASTM A269, ASTM A213 & ISO 9626 conforming in our ultra-clean 304 & 316L. Typical applications include needles and all manner of needle device applications, biopsies, veterinary and dental.

Standard Needle Tubing Sizes (Gauge Chart)

Gauge (G)OD (mm)OD (inch)Wall (Regular)
7G4.5720.1800.21 mm
14G2.1080.0830.15 mm
18G1.2700.0500.12 mm
21G0.8190.0320.10 mm
25G0.5150.0200.08 mm
30G0.3110.0120.06 mm
34G0.1840.0070.04 mm

Metric Small Diameter SS Tubes — Engineered for Global Standards


For European, Japanese, and Indian engineering OEMs, we manufacture metric small diameter SS tubes conforming to EN 10216-5, DIN 17458, JIS G3463, and IS 6913. Sizes range from 3 mm OD × 0.5 mm WT up to 25 mm OD × 3 mm WT, available in seamless and welded constructions.

Typical metric applications we supply for:

  •   Hydraulic & pneumatic micro-fluidics
  •   Thermocouple and RTD sheaths
  •   Automotive fuel rails and injector lines
  •   Semiconductor gas delivery systems
  •   Robotic and medical surgical instruments

Mirror Polished SS Small Diameter Tube — Aesthetic Meets Hygiene


A mirror polished SS small diameter tube is more than a visual upgrade — it's a functional one. We achieve internal and external surface finishes up to Ra ≤ 0.2 µm (≈ #8 mirror finish) through multi-stage electropolishing and buffing. This makes them ideal for:

  •   Pharmaceutical fluid lines (USP Class VI compatible)
  •   Bioprocess piping (cGMP, 3-A Sanitary)
  •   High-end architectural railings and furniture
  •   Dairy and beverage processing equipment

Our electropolished tubes pass ferroxyl tests and are supplied with surface profilometer reports on request.

Coiled Small Diameter Tube — Long-Length, Joint-Free Solutions


A 30 metre – 1,500 metre run can be supplied in a single coil with zero welded joints. This minimises installation time on site. Small bore coiled tubing is manufactured from 6mm OD to 19.05mm OD. Inner diameter cleaning to specification available for instrumentation and analyser tubing.

Why Engineers Specify Coiled Tubing

  •   Zero weld joints = zero leak points
  •   Faster installation in oilfield, refinery, and HVAC projects
  •   Cleaner internal flow for instrumentation lines
  •   Lower lifecycle cost vs. straight-length jointed tubes

Industries We Serve


Our small diameter SS tubes are quietly working inside some of the world's most critical systems:

  •   Medical & Healthcare — surgical instruments, catheters, biopsy needles
  •   Aerospace & Defence — hydraulic micro-lines, sensor housings
  •   Oil & Gas — downhole control lines, chemical injection coils
  •   Pharmaceutical & Biotech — high-purity fluid handling
  •   Automotive — fuel injection, brake lines, exhaust sensors
  •   Semiconductor — ultra-high-purity gas delivery
  •   Laboratory & Analytical — chromatography and spectrometry lines

Frequently Asked Questions


What is the smallest stainless steel tube you can manufacture?

We can produce tubes as small as 0.20 mm OD with 0.04 mm wall thickness, suitable for 34G hypodermic needle applications.

Which grades of stainless steel do you offer for small diameter tubing?

We stock and manufacture grades 304, 304L, 316, 316L, 321, 904L, and duplex 2205, with custom alloys like Inconel 625 and Hastelloy C276 available on request.

Do you supply both seamless and welded small diameter SS tubes?

Yes. We supply seamless tubes (cold-drawn) for high-pressure and medical applications, and welded & redrawn tubes for cost-sensitive instrumentation use.

What certifications come with your tubes?

Every order ships with EN 10204 3.1 Mill Test Certificates, PMI reports, hydro/pneumatic test reports, and on request — NACE MR0175, NORSOK, and biocompatibility certificates.

What is the minimum order quantity (MOQ)?

MOQ starts at just 10 metres for standard sizes from stock, making us a preferred partner for R&D prototyping and short-run production.

Do you export internationally?

Yes — we ship to North America, Europe, the Middle East, Southeast Asia, and Africa with door-to-door logistics and full export documentation.

Why Engineers Across India and Abroad Trust Us


With a legacy built on metallurgy, transparency, and engineering responsiveness, we are recognised among the most reliable small diameter stainless steel tubing manufacturers and exporters in India. Our team includes metallurgists, NACE-certified inspectors, and application engineers who work directly with your design team — not just your purchase team.

"We don't just sell tubes. We solve tubing problems."