Standard for Assessment of O-Ring Appearance
Standard for Assessment of O-Ring Appearance
(OP)
I'm going to be having some o-rings pulled out of a valve to be assessed for how well they have performed after several years of service. I'm asking to have the valve manufacturer prepare a report including detailed pictures of the O-rings but I'd also like an "objective" evaluation of O-ring condition in regards to visual appearance (blisters, cracks, residue).
I've seen such reports in the past that use references such as "ASTM #6 blisters" found on the O-ring but I'm at a loss as to what ASTM standard these criteria come out of.
I've reviewed NACE TM0187 (didn't find anything), NORSOK M701 (a scale for RGD damage from cracks but nothing on blisters) and I looked at a variety of ASTM standards but didn't find anything that seemed to provide objective criteria for assessing visual appearance.
Can anyone point me in the right direction ?
I've seen such reports in the past that use references such as "ASTM #6 blisters" found on the O-ring but I'm at a loss as to what ASTM standard these criteria come out of.
I've reviewed NACE TM0187 (didn't find anything), NORSOK M701 (a scale for RGD damage from cracks but nothing on blisters) and I looked at a variety of ASTM standards but didn't find anything that seemed to provide objective criteria for assessing visual appearance.
Can anyone point me in the right direction ?





RE: Standard for Assessment of O-Ring Appearance
RE: Standard for Assessment of O-Ring Appearance
There does not appear to be a current document D810 ?
RE: Standard for Assessment of O-Ring Appearance
RE: Standard for Assessment of O-Ring Appearance
I apologize for the error, the correct standard is ASTM D 714 Standard Test Method for Evaluating Degree of Blistering of Paints. That's what I get for working from memory rather than double checking the exact number. Ugh.
RE: Standard for Assessment of O-Ring Appearance
RE: Standard for Assessment of O-Ring Appearance
One of the most important parameters you want to inspect is the amount of compression set in the o-rings. This can be measured quantitatively.
RE: Standard for Assessment of O-Ring Appearance