This video shows the uplift resistance to pressure or flood to AS3996:2019 clause 4.2.8 on a DN600 Class D240 Composite Access Cover and frame.

This test is not testing the lid but the threads within the frame.

We did this to satisfy ourselves that the new M12 316 stainless steel inserts were up to the task.

The calculations in clause 4.2.8 gave us a target of 14kN to be held for one minute, which passed easily.

There is really not much to see but look below to see the video that shows taking the threads to their limit.

The video below to the left is what we did in house to see if the inverted pullout test might be successfull based on AS3996:2019 clause 4.2.8, note 3 which says the inverted pullout test load is based on uplift caused by .05Mpa(.5 bar) internal pressure.

We applied just under .6 bar(60 kpa) for over a minute, we were then happy to send it out for an inverted pullout test.

The lid was a DN600 Class D240, the frame was fitted with 4 x M12 316 stainless steel inserts which are molded in the production process.

We had previously tested and held the pressure for 5 minutes but the video was even worse than this one so we did it again, there was no need to watch a stationary gauge for 5 minutes.