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Drum It Up! Steel Drum Industry News, Trends, and Issues

Posts Tagged ‘skolnik industries’

The Basics of UN Drums

July 13th, 2018 by Natalie Mueller

Filed under: DOT/UN

Proper packaging is crucial, especially for dangerous goods. Using the wrong container to transport or store your goods can have a disastrous impact on your facility, community, employees and the environment. With countless manufacturers and transportation companies across the globe building and utilizing industrial containers everyday, there needed to be a level of regulation and oversight in the packaging and transportation industry. One of those levels of regulation comes from the United Nations.

For a drum to be UN approved and rated it needs to be built, tested and certified to contain liquid or solid dangerous materials. Only packages that are certified to have passed the UN packaging standard tests may be used to transport dangerous goods.

A few basics on UN drums and the regulations that surround them:

UN drums are tested against drop, stack, leak and pressure standards. UN performance standards are an internationally recognized system of ratings for solids and liquids.

All UN certified drums are marked with a code that indicates the physical nature of the product for which they are suited. This code always starts with the letters “UN” in a circle. This marking is permanent.

There are three dangerous goods packing groups. The first (packing group I) refers to UN Drums and barrels such as those manufactured by Skolnik. This packing group is built to the highest standard.

It is the shipper’s legal duty to select and fill packages correctly. It is also the shipper’s duty to ensure that packages are marked accordingly. Shipping container packers should check that packages are properly marked and, if they are not, should not transport them. But the responsibility of proper selection falls on the shipper.

Do you know what UN rating your materials need? Skolnik can help you understand the UN ratings and guide you to the packaging suited for your use. What’s more, Skolnik UN drums are built stronger and thicker than the industry standards require.

The Five Families of Stainless Steel

June 28th, 2018 by Natalie Mueller

Filed under: Stainless Steel

At Skolnik we offer a host of steel containers — our stainless steel drums offer an ideal solution for products requiring the purity, compatibility and strength of stainless steel. But just like Skolnik offers different families of products, there are different families of stainless steel. Five to be exact: austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, duplex stainless steel and precipitation hardening stainless steel. The families are classified by their crystalline structure.

 

Austenitic stainless steel is the largest family. About two thirds of all stainless steel produced falls into this category. Their crystalline structure is achieved by alloying with sufficient nickel and/or manganese and nitrogen. These stainless steels maintain their microstructure at all temperatures so they can’t be hardenable by heat treatment, but can be strengthened by cold working to an extent.

Austenitic stainless steel is great for formability and weldability, they are also essentially non magnetic. They’re often used for tanks, containers, storage vessels, architecture and the like.

 

Ferritic stainless steel has a structure more similar to carbon steel, contains between 10.5% and 27% chromium with very little or no nickel. Due to the chromium structure, ferritic stainless steel also holds its structure at all temperatures and is not hardenable by heat treatment. However, they are magnetic and are problematic to weld.

Welding creates microstructural problems so ferritic stainless steel is not used in the construction of large, heavy walled vessels and tanks and structures.

 

Martensitic stainless steels form a family that can be heat treated to provide the adequate level of mechanical properties. Martensitic stainless steels are magnetic and are less corrosion resistant than ferritic and austenitic due to a lower chromium content.

However, their high carbon content enables them to be significantly hardened so they are commonly used for knives, razor blades, cutlery and tools.

Duplex stainless steel’s structure is a combination of that of austenite and ferrite, usually at a 50/50 or 40/60 mix. It’s characterized by high chromium and molybdenum with lower nickel contents. The mixed microstructure results in higher resistance to chloride stress corrosion.

Duplex stainless steel can be difficult to weld properly, but can sometimes be a cost-effective solution for chemical processing, transport and storage, and marine environments.

 

Precipitation hardening stainless steel has corrosion resistance comparable to austenitic varieties but can be hardened to even higher strengths than martensitic steel. Precipitation hardening stainless steel is often used for gears, valves and other engine components, nuclear waste casks, and other pieces in aerospace and other high-tech industries.

 

Beyond that, there are over 150 grades of stainless steel.

Skolnik stainless steel drums are available in a variety of gauges and sizes and are stainless types 304 and 316, both austenitic, and 409, a ferritic stainless steel. And our products are built thicker, heavier and stronger than industry standards require.

 

Overpack Salvage Drums not Recommended for Primary Shipment

June 25th, 2018 by Natalie Mueller

Filed under: Salvage Drum

Salvage drums have long been used as overpacks for the efficient and effective transport of damaged, defective or leaking containers. However, according to the DOT, salvage drums are NOT to be used as a secondary container, or overpack, for a primary shipment.

Rather, an overpack salvage drum should only be used for damaged, defective, leaking or non-compliant packagings that are discovered after having been placed in transportation.

In 1998, the ‘T’ Salvage drum became the United Nations’ recommended salvage packaging for international use. It is most commonly an 85 US gallon capacity. To bear the UN certification, overpack salvage drums are rigorously tested. They must be able to be dropped 1.2 meters (4 feet) on its most critical orientation without leaking and pass a 30 kPa overall Leakproofness Test. However, while they are certified to hold non-compliant packages in transport, the DOT recommends that, once overpacked in a salvage drum, a non-compliant container should be routed to a facility for disposal or re-containment. You can never be too careful.

And remember, traditional overpack drums are designed to protect non-leaking containers or to be used in a combination pack, they are not certified to hold damaged/non-compliant containers.

Hot or Cold Rolled? The Differences Between Steel Types

May 31st, 2018 by Natalie Mueller

Filed under: Industry News

It should come as no surprise that we here at Skolnik take great care in the steel we use to make our barrels. In every size we offer, from 15 gallon drums to 110 gallon and everything in between, we carefully consider every decision of the process, and one of the first to make is whether to use hot rolled steel, or cold rolled. Despite sounding like coffee orders, these terms describe how the steel is handled early on, and has a big impact on the final outcome of our barrels.

Regardless of the type of rolling process the steel ultimately goes through, when it’s first created it’s shaped into an ingot, billet, bloom or slab; the different shapes and sizes of the still raw, semi-finished steel. From there, the steel is heated above 1700 degrees Fahrenheit, which breaks down the crystals that make up the metal’s natural state. From there, the malleable molten metal is pushed through a variety of wheels, or rollers, that form the metal into its next shape. This can be the “I” shape of a structural beam, the round shape of a rod, or the flat sheets that we eventually use in our drums.

If this is all the work done on the steel, it’s considered hot-rolled. The steel is left to cool and then shipped off to be used in a wide variety of applications. Because of this shorter production time, hot-rolled steel is cheaper than cold-rolled. The trade-off is that is has an unattractive scale on the outside from being heated and is less accurate in its dimensions due to the shrinking and warping that occurs as it cools. Cold-rolled steel, on the other hand, isn’t finished after its initial shaping, and the additional steps it goes through are what sets it apart from its hot-rolled counterpart.

Once it’s been cooled to room temperature, there are a variety of finishing steps that cold-rolled steel can go through in this cooler state, including additional passes through rollers to further shape it, annealing, tempering and surface grinding and polishing. By going through these extra steps, cold-rolled steel is a cleaner, more attractive, more resilient metal with more accurate dimensions than steel that has merely been hot-rolled.

Here at Skolnik we only use cold-rolled steel in our products. In order to insure the correct dimensions crucial for maintaining the quality and consistency of such products as our 15 gallon drums, cold-rolled steel is the appropriate choice. Not only that, but it’s also better at taking paints and finishes that we apply to our barrels, making sure the surfaces of each drum are up to our demanding standards. Of course, how the steel is rolled is only one of many decisions made on the path to an excellent barrel, but by making the right choices early on, we insure that we make the absolute best product for our customers.