How to figure out Anti-Blow-Out stem Ball valve

[Danlap]

Dear valve experts,

Need some insight on how to determine (or best approach) which (Ball) valves still designed without Anti-Blow-Out stem feature.
Find below case in one of my old Plant. Fortunately no one was hurt when the lever fell of

Understand that standard wise (BS 5351 and ISO 7121) start to officially regulate the anti blow out stem design in 1986. However prior that year, the two types (with and without Anti blow out) were exist.
Question from my maintenance team: How do we know which one is which.
PS: dismantle similar valve. Find out that one had ABO stem and one didn't.
Any idea on how to approach this case gentlemen? No data on the system (SAP) and replacement of the whole corroded Ball valves (assuming its old) would hardly ever accepted based on suspicion only.

Thank you beforehand for the input.
Regards,
MR

All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected

 

[ehbadger]

How many are you talking about? If a visual external look doesn't offer the differentiation you need, then perhaps:

1) If there is a smaller # perhaps bring in a radiography crew for a day or two and shoot them all.
2) If there is a large amount, radiography could still be done "representative" shots and then you have a little more basis than suspicion for a wholesale changeout.

I recently did a very similar thing, we had issues with old drain nipples failing, some being sch40 rather than sch80 as (now) required and thread corrosion, etc. Bunch of drains/vents in 1/2" size. UT was unreliable and didn't pick up corrosion in the threaded joint, so I started with a few representative xrays from different process areas, found that a decent amount were 'bad' then proceeded to do a full RT audit that eventually led to replacement of nearly all the drains/nipples in the process at the next outage.