ASME B16.5 Standard Marking

ASME B16.5-2017 - Pipe Flanges And Flanged Fittings

Standard markings shall be marked as required in MSS SP-25, except as noted in para. 4.2 of this code.

Identification Markings (complusory)

  • Name. The manufacturer’s name or trademark,
  • Material. Material specification,
  • Rating Designation. (i.e., 150, 300, 400, 600, 900, 1500, or 2500).
  • Conformance. The designation B16 or B16.5
  • Size. The NPS designation shall be marked on flangesand flangedfittings.
  • Ring Joint Flanges. The edge (periphery) of each ring joint flange shall be marked with the letter R and the corresponding ring groove number.

Below photo are acceptable the markings.

Identification Markings (optional)

  • Multiple Material Marking. Material for components that meet the requirements for more than one specification or grade.

B16 and B16.5 are required stamping?