SCHEDULE 1 - Tests for stoppers

Clauses 8 and 9

PART 1 - Filling hot water bottle prior to testing

Division 1 - Procedure for filling a hot water bottle designed to be partly filled

1.    Fill the hot water bottle to two-thirds capacity.

2.    Expel all the air by lowering the hot water bottle carefully on to a flat surface.

3.    Insert the stopper, ensuring that –

(a) if the stopper is a screw stopper, the stopper is tightened to a torque of (2 ± 0.1) Nm; and

(b) if the stopper is a push-in stopper, the stopper is pushed in fully.

Division 2 - Procedure for filling a hot water bottle designed to be completely filled

1.    Completely fill the hot water bottle in an upright position until water appears at the opening.

2.    Insert the stopper, ensuring that –

(a) if the stopper is a screw stopper, the stopper is tightened to a torque of (2 ± 0.1) Nm; and

(b) if the stopper is a push-in stopper, the stopper is pushed in fully.

PART 2 - Tests for stoppers

Division 1 - Test 1

1A.    For a hot water bottle that is designed to be partly filled, follow the procedure set out in Division 1 of Part 1 and use water at a temperature of (85 ± 2) ^o C.

1B.    For a hot water bottle that is designed to be completely filled, follow the procedure set out in Division 2 of Part 1 and use water at a temperature of (85 ± 2) ^o C.

2.    Place the hot water bottle in a horizontal position.

3.    Apply the following force, evenly distributed over the surface of the hot water bottle, for 5 minutes:

4.    Check the hot water bottle for any visible leakage of water.

Division 2 - Test 2

1A.    For a hot water bottle that is designed to be partly filled, follow the procedure set out in Division 1 of Part 1 and use water that has just gone off the boil.

1B.    For a hot water bottle that is designed to be completely filled, follow the procedure set out in Division 2 of Part 1 and use water that has just gone off the boil.

2.    Invert the hot water bottle and suspend it vertically for 10 minutes.

3.    Remove the stopper and empty the hot water bottle.

4.    Repeat step 1A or 1B, and then steps 2 and 3 twenty times in a continuous period for up to 168 hours and check for any visible signs of leakage on each occasion the steps are repeated.

5.    Examine the stopper for any visible damage.

PART 3 - Test for separation of screw stoppers

Division 1 - Torque wrench

1.    To comply with the procedure set out in Division 3 , use a torque wrench that –

(a) is capable of being set to read an accuracy of 0.1Nm; and

(b) has a suitable adapter that fits the screw stopper; and

(c) provides the application for the torque through the axis of the screw stopper.

Division 2 - Tensile machine

1.    To comply with the procedure set out in Division 3 , use a tensile machine that –

(a) is capable of generating a tensile force of 0.5kN between the upper and lower platen; and

(b) has an upper platen equipped with a tensile jaw capable of holding the screw stopper; and

(c) has a bottom platen equipped with a jaw capable of securely holding the body of the hot water bottle without tearing any part of the hot water bottle.

Division 3 - Procedure

1.    Ensure that the hot water bottle is at a temperature of (23 ± 2) ^o C.

2.    Insert the screw stopper and use a torque wrench to tighten to a torque of (2 ± 0.1) Nm.

3.    Use a tensile machine to apply a force of 0.5kN between the body of the hot water bottle and the stopper continuously for 5 minutes.

4A.    For a hot water bottle that is designed to be partly filled, follow the procedure set out in Division 1 of Part 1 and use water at a temperature of (85 ± 2) ^o C.

4B.    For a hot water bottle that is designed to be completely filled, follow the procedure set out in Division 2 of Part 1 and use water at a temperature of (85 ± 2) ^o C.

5.    Use the test apparatus referred to in Part 1 of Schedule 3 to apply the following force, as a continuous compressive force, to the body of the hot water bottle for 2 minutes ± 30 seconds:

6.    Inspect the hot water bottle for visible leakage and for any separation of the stopper.