container plywood flooring Inspection (testing) report

National day business has become a normal, because the factory does not have a holiday, we can not have a holiday.

Although the international trade market is not good and shipping is becoming more and more difficult, the renewal rate of containers is on the rise. We saw that the purchase orders of container flooring plywood factory have been arranged to December.

QUALITY CONTROL OF PLYWOOD PANELS
QUESTIONS TO OWNERS AND SUPPLIERS

1. GENERAL • During the last years the number of severe floor damages increased dramatically. Even in brand new containers we find completely broken floors. • The quantity of delamination of new floorboards occurs quite more often than in the past. • This development is a consequence of the increasing difficulties throughout the industry to obtain the necessary amounts of high quality plywood floorings for the increasing number of new built containers in Far East. • Facing this problem it became more and more important for the container owners to establish quality insurance programs for the permanent monitoring of the factories.

• The increase of floor damages causes also an increase of floor repairs in the depots all around the world. Due to the high demand of wood in China and the increasing quality controls in the factories the repair industry is facing big problems to receive the requested quality from the suppliers of plywood. Furthermore it is a big problem to control or verify the certificates which are presented by the Asian suppliers. • We see increasing problems with the supply of container floor boards in Europe. • Facing this situation, the B.C.S.B. started a project to investigate the possibilities to ensure the requested quality for plywood container floorboards.

TEST METHODS

There are several different methods used to test the quality of the floorboards
• ISO 1496-1 = CSC
• IICL TB001 Short Span Bending Test
• Floorboard Strength Test
• Specific Gravity Check
• Bonding Test / Boiling Test
• Moisture Content Check
• Identification

Procedure The test shall be performed using a test vehicle equipped with tyres, with an axle load of 5.460 kg 1) . It shall be so arranged that all points of contact between each wheel and a flat continiuos surface lie within a rectangular envelope measuring 185 mm1) (in a direction parallel to the axle of the wheel) by 100 mm1) and that each wheel makes physical contact over an area within this envelope of not more than 142 cm2 1). The wheel width shall be nominally 180 mm1) and the wheel centres shall be nominally 760 mm1). The test vehicle shall be maneuvered over the entire floor area of the container. The test shall be made with the con- tainer resting on four level supports under its four bottom corner fittings, with its base structure free to deflect.

The test shall be performed using a test vehicle equipped with tyres, with an axle load of 5.460 kg 1) . It shall be so arranged that all points of contact between each wheel and a flat continiuos surface lie within a rectangular envelope measuring 185 mm1) (in a direction parallel to the axle of the wheel) by 100 mm1) and that each wheel makes physical contact over an area within this envelope of not more than 142 cm2 1). The wheel width shall be nominally 180 mm1) and the wheel centres shall be nominally 760 mm1). The test vehicle shall be maneuvered over the entire floor area of the container. The test shall be made with the con- tainer resting on four level supports under its four bottom corner fittings, with its base structure free to deflect.

IICL SHORT SPAN BENDING TEST

COMPARISON
Parameter Span Bending Test ISO 1496-1
Specimen Length 304,8 mm 360,0 mm
Specimen Width 50,8 mm 550,0 mm
Distance Load Support 254,0 mm 252,0 mm
Breaking Load 6.766,6 N 35.598,0 N
Load Width 0,33 x 12,7 mm 78,9 mm
Load Length 50,8 mm 180,0 mm
Load Area 212,9 mm² 14.200,0 mm²
Breaking Pressure 31,8 MPa 2,5 MPa

Which is the right test method for all Plywood throughout the industry?
• Can it be one standard method or should there be different grades e.g.
 H-Grade = All tests according to IICL TB001 fulfilled
 A-Grade = All criteria of ISO 1496-1 / CSC + 33% fulfilled
 B-Grade = All criteria of ISO 1496-1 / CSC fulfilled
 C-Grade = Only for storage or sales units / not for international transport

 

CONTAINER FLOORING PLYWOOD
Thickness: 28mm
Size:  1160mmx1200mm and 635mmx2400mm.
Core material: 19 Layers Mix tropical hardwood veneer .
Fcae/Back: Keruing Veneer
Glue: Phenolic WBP, Melamine WBP
Density : 720 – 830kgs/CBM

BREAKING PATTERNS

IMPACT PICTURES OF THE UNDERSIDE OF
COMPLETELY BROKEN SHEETS

If it is clear that a sheet that has failed in a test is completely broken
and therefore does not cope with ISO /CSC requirements any more
shows the same or even less visible impact as
• a lot of samples which have been qualified as “Acceptable Finger Cracks”
by different well known container owners, then
? how can a depot inspector decide which repair must be quoted on an
estimate in accordance with CSC/ACEP?
? why are depots obliged to do costly local lab tests and quality controls?

Why can test results be so different between
 suppliers tests prior to the shipment to Europe and
 re testing of the same sheets in the depots local laboratory?
• How can the industry achieve unique testing methods and
quality assurance plans all over the world?

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