Abstract： ASME PVHO-2:2016 pdf download.Safety Standard for Pressure Vessels for Human Occupancy:In-Service Guidelines. 2-6.4 Annealing Severely Damaged Windows Upon completion of final machine polishing, the window is to be annealed in accordance wi...

ASME PVHO-2:2016 pdf download.Safety Standard for Pressure Vessels for Human Occupancy:In-Service Guidelines.

2-6.4 Annealing Severely Damaged Windows

Upon completion of final machine polishing, the window is to be annealed in accordance with Mandatory Appendix IV. After annealing, the repaired window shall be inspected to ensure it meets the requirements of minimum thickness, dimensional tolerance, surface

finish, and inclusion limitations applicable to the fabrication of new acrylic windows in accordance with

ASME PVHO-1.

2-6.5 Thickness Check

After any window repair has been completed, the thickness shall not be less than the required minimum thickness of the window

design as stated on the original Window Design Certification. All repairs (regardless of their extent) shall be documented using

the applicable portions of [‘VI 10-2 Form VP-2 and retained in the documentation package (see para. 2-4.8).

2-6.6 Nonconformance

If the post-repair window thickness does not meet the required minimum, the window may be assigned a lower pressure rating by

having such lower value entered into the design data package (along with all supporting calculations). It shall not be used in a

PVI-IO having a MAWP greater than that lower value.

2-6.7 Post-RepaIr Annealing and Pressure Testing

After completion of any machining, including machine polishing, the window shall be annealed and pressure tested in accordance with the requirements set forth in Mandatory Appendix IV.

2-6.8 MarkIng of Repaired Windows

Windows that have been repaired by a qualified window fabricator shall be marked as follows by the window fabricator performing the repair

(a) The repair identification shall consist of 0.5 in. (12.5mm) letters and numbers made with indelible black marker, or 0.125 in. (3.175 mm) letters and numbers made with epoxy ink on the window’s edge. The writing shall not interfere with the ability of the window to seal properly.

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