Testing, Ratings and Quality FAQ
Every single container that is manufactured is leak-proof tested twice while in production, both the body and the top and the bottom intersections with the body are all tested. This test is carried out on 100% of the containers manufactured.
How do you measure the quality of the containers?
We have the following quality inspections to verify that the requirements of the purchase order and Customer's quality requirements are met: On-line inspections based on visual inspections and random source inspections are performed on a daily basis. In addition, we document corrective actions based on non-conformances found with an associated cost. This allows us to quantify the cost of poor quality products and keep track of improvements through the decrease of the corrective action cost from month to month and year to year. Also, each order has a traceable link, which allows us to confirm quality compliance.
What sort of testing does Skolnik do?
We do two types of testing. One is the production testing described above and is carried out on 100% of the containers that are manufactured.
The second type of test is the United Nations (UN) recommended performance tests that are carried out on every design of container that we offer at least once a year.
A design is essentially a type of container. If, for example, you change the steel, you are considered to have changed the design.
The tests carried out on a design will consist of the following:
If the container is designed to hold liquids, six tests will be performed where the container is filled with water and dropped (The height depends on the packing group, the higher the performance the higher the drop.). Three of these drops will occur on the bottom of the container and three on the next weakest point. If the container is to hold solids then the tests are repeated with the contents of the containers being a solid material and an additional six drops are performed.
All containers to hold liquids will be subjected to a hydrostatic water pressure test where pressure is applied to the interior of the container through water under pressure and the container then gets a rated pressure rating measured in kilo-pascals.
All liquid rated containers and salvage drums are also subjected to an air leak proof test where 5 psi of air is injected into the container and the container is submerged in water to detect leaks.
Finally, as a last part of the performance tests, all containers are placed beneath weight that corresponds to the weight of a stack of the same filled containers to a height of ten feet. For example, if a container is three feet tall and filled weighs 400 KG, the weight placed upon the bottom container would need to equate to 1200 KG, or the same as three containers placed on top of the one on the ground.
What is a UN rating and what does it mean?
A UN rating is a mark that is placed on a container that signifies the performance level that the container was manufactured to. The higher the mark, the higher the corresponding performance of the container. A Packing Group I (or X) container would be the highest rated container and a Packing Group III (or Z) rated container the lowest.
What difference does gauge of steel make?
Generally the heavier and thicker the gauge of steel used to manufacture the container, the sturdier the container will be in service. The gauge used will not always be reflected in the performance of the container with regard to it's UN marking, but a sturdier container will certainly stand up better to the rigors of transportation. A lighter container will most certainly not stand up as well.
What does 1.2 mean?
In reference to a steel container, 1.2 could mean one of two things: It could simply refer to the maximum specific gravity of the material allowed to be transported in the container or it could refer to the thickness of the steel (the gauge) in which case 1.2 would mean 1.2mm as all measurements for steel containers are regulated in metric. See Gauge chart