Material markings inspection

ASME SA-106/SA-106M-2019 – Production Marking – Section 25

ASME SA-530/SA-530M-2019 – production Marking – Section 24

Example markings inspeciton:

Each length of pipe shall be legibly marked with (eg.):

  • The manufacturer’s name or brand: BCK.
  • The specification number: ASME SA-106/SA-106M.
  • Grade: B.
  • Heat number: 3-35727.
  • ASME SA-106/SA-106M – Table 4: NDE/2500 PSI.
  • The length: 6000 MM.
  • The OD: NPS 3″.
  • The Schedule: SCH XXS.
  • The weigtht: not applicable for NPS 3″.
  • Supplementary: not applicable.

Dimensional and visual inspection:

  • Forming/dimension/masses:  ASME B36.10M – 2018; ASME SA-530/SA-530M – Table X1
  • Tolerance: ASMESA-530/SA-530M – Section 7, 8, 9, 10, 11, 12 – Table 1, 2, 3.


  • This material do not cover welded pipe, see Section 1.1 of ASME SA-106/SA-106B.
  • Production analysis shall be made on the representative two pipes from each lot, see Section 9.1 of ASME SA-106/SA-106M.

Guide to transfer markings information to a shorter length:

  • Step 1: Verify MTC and pipe section are matched, dimensional / visual inspection for each pipe.
  • Step 2: Transfer original markings to cut off length (unmarked cut length) by paint marker
  • Step 3: Stamp “processor’s name or trademark, brand (for resale) on both pipe segment.
  • Step 4: Shot photo of the original markings and new transfer identification for preparing a report, photo report should minimum show all production markings, processor’s identification, buyer name, date, signature, … and attachment the MTC.
  • Step 5: Cut the shorter length for resale by processor.

Code marking:

  • Pxxxx – Pipe.
  • Die stamp may be stamped on the thickness with T>= 6mm for carbon steel and  T>= 12 mm for stainless steel unless otherwise by supplementary requirements.
  • Piping process fabrication may not required die stamp on the off-cut length.

Storage pipe material

  • Keep pipe material in dry area, keep away wet condition.
  • All end pipes shall be protected by plastic covers.


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