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If length-restrictions are violated, the ability to arrest flame is uncertain as fire tests were performed adhering to the stated pipe configuration.
Does the fragment in bold mean "because fire tests were performed by adhering to the stated pipe configuration" or "when fire tests were performed by adhering to the stated pipe configuration".
I think that "because" applies here, but may be mistaken.
The fragment is taken from operating/maintenance instructions for HS-ISO pressure valve.
In my view, it means "because". The fire tests were performed on the pipes configured to certain specifications. If those specifications are not followed, the fire tests may not be valid.
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