A249 A269 A270 A312 A554 Stainless Tube Inquiry –304304L316316L309S Welded and Mirror-Finish Review

• Grade

  300 Series, Stainless Steel 304/304L/316/316L
  Invoicing

  By Theoretical Weight
• Steel Grade

  316, 304, 304L, 316, 316L, 304/304L/316/316L/309S/310/904L
  Surface Finish

  2B
• Tolerance

  ±1%, ±1%
  Type

  Seamless, Welded / Seamless
• Alloy Or Not

  Is Alloy
  Application

  Petroleum, Chemical industry, Mechanical equipment
• Delivery Time

  within 7 days, 7-15 days
  Section Shape

  Round, Round
• Standard

  AiSi/ASTM
  Welding Line Type

  EFW / ERW
• Thickness

  0.5mm-20 mm
  Shape sections

  Round, Square, Rectangular

Stainless tube has one actual variant without populated size options. Welded square/round and mirror-polished title requests need a selected shape, route and finish.

Define the fabricated tube

Body thickness is0.5–20mm, with round, square and rectangular section alternatives. Specify exact OD or side dimensions, wall and length on a drawing.

• 304/304L/316/316L family.
• 309S title grade request.
• Seamless/Welded route alternatives.
• EFW/ERW line references.
• 2B surface field.

Choose inspection scope

A249/A269/A270/A312/A554 references are not simultaneous verified compliance. Agree the actual product standard, welding route and material inspection.

Approve the surface

Mirror polishing differs from the2B field and requires actual finish acceptance. Application wording does not establish hygienic approval, pressure capacity or corrosion service life for the selected tube.