Our Company always considers quality as the core of market competition after foundtion, because of the successful positoning and strong sense of quality from all our staffs, Vinmay can be one of the best stainless steel welded tubes suppliers in the world.

Over 10 Inspection Processes

ss pipe thickness inspection
Raw Material Inspection
Surface inspection
Surface Inspection
stainless steel square tubing dimensions inspection
Dimension Inspection
roughness test
Roughness Inspection
Chemical composition test
Chemical Composition Testing
Eddy current flaw detection test
Eddy Current Testing
Physical Performance Test
Mechanical Properties Testing
Intergranular corrosion test
Intergranular Corrosion Testing

Quality Certificates and
Testing Standards

All of the tubes from Vinmay are produced under strict quality management systems: ISO 9001 and PED. ( European pressure equipment certification)

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All tubes from Vinmay are manufactured strictly according to the following international standards.

Download the standards in the following:

Product Quality Advantages

raw material ss pipe12 Mill Test Certificate Vinmay

Raw Material


All of the raw material in Vinmay are from TISCO, BAOSTEEL, TSINGSHAN and other high quality steel supply refining furnace materials, which can make sure a high stability and corrosion resistance to all of our products.

In addition, we can provide the quality inspection report of raw materials.

Thickness and Outer Diameter

  • Produced according to international standard tolerance
  • Good for fittings assembly
measuring stainless steel tubeStainless steel tube
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Outer Surface

  • Free from press point, scratches, black spot.
  • Mirror finish 600 Grit ( Close to Taiwanese and Italian producers)
  • Outside welded lines are invisible
stainless steel tube 600grit

Welded Line

  • Fully T.I.G welding with bead max 0.2mm height, suitable for bending
round mirror ss tube 13Bend pipe

Mechanical Properties

  • Flaring, flattening and flange testings allow us to follow standards: EN 10217-7, EN 10312, DIN11850(EN10357) , ASTM 249/269 and 270
Physical Performance Test

Pipe Inner Surface

  • With inside bead removing, the roughness of welded area is under 1.6 Ra
  • After inside polishing ,roughness reaches 0.4-0.8 Ra
  • 100% Tube inside cleaning ( ultrasonic wave and wipe)
pipe Inner surface

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