1440 Timberwolf Drive, PO Box 964, Holland, OH 43528-0964 USA | 1 (419) 867-5400 | Email Us

1440 Timberwolf Drive, PO Box 964, Holland, OH 43528-0964 USA
1 (419) 867-5400 | Email Us

Region Location

1440 Timberwolf Drive
PO Box 964
Holland, OH 43528-0964 USA

Stress Cracking

Sample Type Required Quantity Equipment Used
Bottles 30 N2 tank and regulator Septum Closures

Purpose

This procedure evaluates the performance of bottle bases when they are exposed to a 0.2% solution of NaOH (Sodium Hydroxide) to simulate the failure associated with Stress Cracking.


Description

Each bottle is filled to net target content with water equilibrated to 22°C +/- 1°C (72 +/- 2°F). Bottles are pressurized with compressed air to the equivalent internal pressure of 531 +/- 4 kilopasclals (77 +/-0.5 psi). After 5 minutes, the fill line on each of the bottles is marked and they are placed in individual pockets of 0.2% Sodium Hydroxide solution. The containers remain in the caustic solution until they fail by either catastrophic burst or leaking through cracks that develop in the base. The time to failure is recorded for each container. Failed containers are removed and the location of the failure is determined and recorded.