We've heard some buzz that crosslink polyethylene (PE) tanks are better than linear high-density polyethylene (HDPE) tanks.
In one YouTube video, a 300-gallon linear polyethylene tank undergoes a drop test.
It's filled with 7000 pounds of water, 10 x the weight of an
Watching this, anyone would think a linear polyethylene tank isn't very robust.
Then, the testers subject a crosslink 300-gallon tank to the
same drop test.
The same test is repeated with 11 000 pounds of water in the
same tank, which is then dropped 15 feet.
It's impressive. Clearly the crosslink tank is the better tank. It can withstand a drop of 15 feet or more!
Except, why would you drop a tank 15 feet or more? A crosslinked tank might have better impact resistance when storing non-extreme applications, but most facilities use a storage tank to hold chemicals.
The true test is whether a poly tank can safely store aggressive chemicals
The test we should be looking at is what happens to a crosslink polyethylene tank if it stores a harsh chemical for a long time.
Whether crosslink or linear, exposing any storage tank to a chemical for a long time will ensure that it performs differently. In fact, a crosslink tank with sulphuric acid in it for 1000 hours or more would shatter on impact, just like the first tank did in the video.
Always question the evidence and draw your own conclusions:
Unusual uses of linear HDPE
Linear HDPE has been used in several unusual ways. Did you know that linear HDPE has replaced Kevlar® in bullet proof vests? Now that's proof of impact resistance! In fact, large sheets of linear HDPE have even replaced ice in skating rinks.
Key benefits of Linear HDPE over crosslink tanks
According to our suppliers at Snyder industries and Peabody
Engineering, both of whom manufacture linear AND crosslink tanks,
linear tanks have evolved to outperform crosslink tanks. Many
other global manufacturers including PE
Tanks, recommend high density linear poly (polyethylene)
chemically safe storage tanks for most bulk storage requirements.
In the sodium hypochlorite manual released by the Chlorine
Institute, they state that, "while sodium hypochlorite
users and manufacturers have had success with high density linear
polyethylene tanks, high density cross-linked polyethylene should
not be used. Vertical stress cracking has been experienced with
the cross-linked polyethylene storage tanks in this service."
The advantages of linear over crosslinked polyethylene are obvious. However, we do caution that you should always make decisions involving specific applications by consulting withqualified professionals.
If you'd like to find out more about linear HDPE and crosslink
PE tanks, call our toll-free number on 1-800-367-4180. We have
experts on hand to help you choose, install, and maintain a
variety of equipment. And to answer questions about things you've
previously tried gone wrong.