Stainless Steel Seamless Tubes 304L and 316L

Product Designations and Dimensions

The document lists commercial designations for stainless steel seamless tubes in grades 304L and 316L. Each designation includes the external diameter and wall thickness in millimeters, along with the corresponding commercial mass (weight) in kilograms per meter.

• Examples include tubes with dimensions such as 9 x 12 mm, 12 x 1.5 mm, 20 x 25 mm, and 25 x 2.5 mm.
• Mass values range from approximately 0.392 kg/m to 1.400 kg/m depending on size and grade.

Tolerances and Fabrication Types

The tubes are manufactured with specific tolerance classes and fabrication methods:

• Tolerances: For external diameter, ±0.75% with a minimum of ±0.30 mm; for wall thickness, ±10% with a minimum of ±0.20 mm.
• Fabrication Types: L.A.F. (Laminated Cold Rolled) and F.A.C. (Hot Rolled).

Product Series

The tubes are categorized into two main series:

• Gas Series (Série Gaz): Indicated as "GAZ RANGE".
• Metric Series (Série Millimétrique): Indicated as "MILLIMETRIC RANGE".

Summary of Key Parameters

Critical Information and Recommendations

• The tubes are seamless stainless steel, ensuring high corrosion resistance and mechanical integrity.
• Manufacturing tolerances are critical for ensuring proper fit and performance in applications.
• Choice between cold rolled (L.A.F.) and hot rolled (F.A.C.) fabrication affects mechanical properties and surface finish.