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Product video
Certifications CE · CE(2) · RoHS

Precision Factory Manufactured 304 Stainless Steel Capillary Tubes Square Seamless Outer Diameters 1mm 8mm ERW Welding Cut-Ready

Available for enquiry 0.0 · 0 reviews 10140 sold
USD

$ 30.00 30.0 USD $ 30.00

Not Available For Sale

Minimum order quantity: 100 Units

Key attributes

View all
Type
Seamless
Standard
ASTM
Tolerance
±1%
Delivery Time
15-21 days
Invoicing
By Actual Weight
Alloy Or Not
Non-Alloy
Product description

Highlights at a glance

  • Ultra-High Precision Control: Advanced cold-drawing technology ensuring OD/WT tolerances as tight as ±0.01mm for perfect fitting.
  • Ultra-Smooth Inner Wall: Internal roughness Ra ≤ 0.4μm prevents fluid clogging and ensures high-purity transmission.
  • Superior Corrosion Resistance: Genuine SS316L/304L materials with full PMI testing; passed 72-hour+ salt spray tests.
  • Bright Annealing (BA) Finish: Mirror-like surface with no scale or oxidation, providing excellent aesthetics and cleanliness.
  • Customized Cutting & End Treatment: Professional services including burr-free cutting, chamfering, and necking to your exact drawings.
  • Certified Quality Assurance: 100% Eddy Current and Pressure tested; supplied with MTC EN 10204 3.1 and ISO certification.
    • Certifications & compliance
    CE(2)
    Complies with EU standards
    RoHS
    RoHS compliant
    Frequently asked questions

    We use advanced cold-drawing technology to ensure high precision. Our standard OD and WT tolerance is ±0.02mm. For specialized medical or instrumentation applications, we can achieve an ultra-tight tolerance of ±0.01mm.

    SS304 is cost-effective and suitable for general industrial and food-grade use. However, if your application involves high-corrosion environments (e.g., marine, chemical, or medical implants), SS316L is highly recommended due to its added molybdenum (Mo) for superior pitting resistance.

    Yes. We control the internal surface roughness strictly. Our Bright Annealed (BA) tubes typically have an internal roughness of Ra ≤ 0.4μm - 0.6μm, preventing clogging and ensuring high-purity transmission for chromatography and laboratory equipment.

    Absolutely. We provide professional secondary processing including precision cutting, chamfering, and deburring. Every piece is inspected to ensure the ends are flat, sharp, and 100% burr-free, making them ready for immediate assembly.

    We provide specialized ultrasonic cleaning and degreasing services. Tubes can be delivered "Oil-Free" and meet the cleanliness standards required for oxygen systems, medical devices, and analytical instruments.

    Protection is our priority. We pack capillary tubes in heavy-duty PVC tubes or reinforced cardboard cylinders, which are then placed into fumigated wooden cases. This "Double-Layer Protection" ensures zero deformation during sea or air freight.

    For standard sizes in stock, the MOQ is only 10 meters (or 1-2 spools). For custom-made specifications (specific material or thickness), the MOQ is generally 50-100 kg or based on a minimum length, depending on production feasibility.
    Description images
    Product detail
    Product detail
    Product detail
    Product detail
    CE(2)
    RoHS
    Packaging and fulfilment
    • Step 1

      Payment and order readiness

      Minimum order: 100 Units

      Payment terms, specifications, and order details are confirmed before preparation begins.

    • Step 2

      Preparation

      7 days

    • Step 3

      Packaging and dispatch

      Ocean freight via Maersk · Approx. shipping fee: $ 0.84 for 1 unit · Transit time: Est. 17-24 days

      Final packing, freight, and delivery dates are confirmed before dispatch.

    Technical specifications
    Other details 18 fields
    Type
    Seamless
    Standard
    ASTM
    Tolerance
    ±1%
    Delivery Time
    15-21 days
    Invoicing
    By Actual Weight
    Alloy Or Not
    Non-Alloy
    Place of origin
    China, Shandong
    Model number (Specification)
    201 202 309 310 321 430 316 304 2207 904 etc
    Application
    Medical Needles, Fiber Optics, Chromatography
    Certification
    CE
    Material
    200 Series/300 Series/400series
    Surface
    Bright Annealed (BA), Electrolytic Polishing (EP), MP
    Usage
    Medical Needles, Fiber Optics, Chromatography, Gas/Liquid Control
    Selling Units
    Single item
    Single package size
    100X100X100 cm
    Single gross weight
    1000.0 kg
    Thickness
    0.3-12.0mm
    Certifications & Compliance
    CE(2), RoHS
    Lead time
    7 days
    Minimum order
    100 Units

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