Group,
I am currently battling a mass of leaking chemical containers world-wide. 1 Liter HDPE bottles. 1000 gallon totes. 55 Gallon drums. I believe they all have impact resistant PP caps/bungs. They are all made by different suppliers. They all carry different chemistry. They all are packaged to spec at 3 different locations, operators, even different companies. The 1L leak worse during air transport, but still significant during ground & ocean shipment. They seem to loosten significantly, down to 35% of their tightening torque (10% if stored at elevated temperature.)
The only consistent factors I notice are timing/season and construction material. Has anyone else experienced any similar issues within the last 6-8 months? Is anyone aware of a change in the processing of PP resin that has impacted dimensional stability or thermal expansion rates?
-Aaron
I am currently battling a mass of leaking chemical containers world-wide. 1 Liter HDPE bottles. 1000 gallon totes. 55 Gallon drums. I believe they all have impact resistant PP caps/bungs. They are all made by different suppliers. They all carry different chemistry. They all are packaged to spec at 3 different locations, operators, even different companies. The 1L leak worse during air transport, but still significant during ground & ocean shipment. They seem to loosten significantly, down to 35% of their tightening torque (10% if stored at elevated temperature.)
The only consistent factors I notice are timing/season and construction material. Has anyone else experienced any similar issues within the last 6-8 months? Is anyone aware of a change in the processing of PP resin that has impacted dimensional stability or thermal expansion rates?
-Aaron