Seamless Stainless Steel Tubes

Key Specifications at a Glance

Material Grades

Austenitic: 304/304L, 316/316L, 321, 347
Others: 310S, 904L, Duplex / Super Duplex (upon request)

Manufacturing & Treatment

Cold drawn / cold rolled
Solution annealed / bright annealed
Straight or U-bent (upon request)

Standards (Typical)

ASTM A213 / A269 / A312 (depending on application)
EN 10216-5 / EN 10305 (depending on requirement)
Custom standards supported

Finish Options

Pickled & passivated
Bright annealed (BA)
Polished / electro-polished (for high cleanliness requirements)

Inspection & Testing

PMI (Positive Material Identification)
Eddy current / ultrasonic test
Hydrostatic / air pressure test
Dimensional inspection & surface defect control

Why Choose Our Seamless Stainless Steel Tubes

Performance You Can Rely On

1) Higher Safety Margin
Seamless tubing reduces risks associated with welded joints, offering stable performance in pressure cycling and harsh media.

2) Strong Corrosion Resistance
From chloride environments (316L) to high-temperature service (321/347), we help match the right alloy to the job.

3) Consistent Quality Control
From raw material verification to final inspection, we maintain traceability and provide documentation for quality assurance.

4) Flexible Customization
OD/ID, wall thickness, length, straightness, and surface finish can be customized—ideal for both mass production and project orders.

Product Categories

Seamless Stainless Steel Tubes By Use

Heat Exchanger Tubes
Optimized for thermal efficiency, clean surfaces, and stable dimensions.
Instrument & Hydraulic Tubing
High precision tolerances, clean ID options, and strict testing for leakage prevention.
Mechanical / Structural Tubes
Reliable strength and machinability for parts processing and fabrication.

Quality & Documentation

Certificates & Compliance

We can provide documentation according to your project needs, such as:

Mill Test Certificate (MTC) / EN 10204 3.1
Chemical composition & mechanical properties report
Inspection reports (UT/ET/HT)
Packing list with heat number traceability

Packaging & Delivery

Export-Ready Packing

Bundled with steel straps or wooden cases (as required)
End caps for protection of tube ID
Moisture-proof wrapping for sea shipment
Clear labeling: size, grade, heat no., quantity
Lead time varies by size/grade/quantity—contact us for a fast schedule estimate.