waste treatment with aluminum
dome and decant lines
Bolted stainless steel storage tanks have been around
for some fifteen years and are fast becoming the
most viable solution to storage needs. Welded
stainless tanks have been around for many, many
years, primarily in the milk and food processing industry.
The bolted stainless tank is generally made of 304,
304L, 316, or 316L stainless, and in some applications 317
or duplex stainless is used. These tanks meet the ASTM,
AWWA and, when needed, the API specifications.
Bolted stainless tanks are environmentally neutral for
they are not shiny but a dull grey, which is very attractive
in most settings. The stainless material comes in plates and
sheets which may differ a little in color at first but within a
couple of months the unpolished stainless passivates and
becomes a dull grey.
These tanks may cost a little more than the painted mild
steel or factory-coated tanks, but have a very positive
impact on the environment through the area of expandability and are nearly maintenance free (no
need for sandblasting, painting,
cleanup or concerns about contamination
due to surface failures). Most bolted
stainless tanks are designed to
expand their size for a nominal fee by
adding plates to the bottom and making
the unit taller. Another area, and
probably the most important to everyone,
is the residual value, if the tank is
no longer needed. Unlike the factorycoated,
field-coated or concrete tanks,
stainless has a high residual value in
the recycling chain because it does not
lose value and requires little, if any,
intervention from federal or local
agencies for cleanup.
Bolted stainless tanks are very easy
to relocate or ship new via common
carrier because they are shipped on
pallets with hardware boxed separately.
These tanks are accepted universally
and are growing in popularity. They
are very popular in water treatment
from pre-treatment to potable water
storage. These water tanks can be used
in conjunction with composite water
towers, reservoirs, standpipes or pretreatment
tanks. They are also used in
stormwater storage and management
and waste treatment plants. Bolted
stainless tanks are becoming very popular
in the groundwater cleanup area,
from collecting leachate from landfills
to industrial site groundwater remediations.
They are used extensively in wastewater
plants because of their durability
in storage, processing and clarifying of
the harsh products and vary in size from
very small to very large. Examples of
types of tanks are sludge storage, clarifiers,
waste treatment, digester tanks, bio
towers (trickling filter tanks) and more.
They are and have been used for
odour control, air pollution control and
for their environmental appearances.
These tanks have also been designed
and used for methane generators.
Contact Earl W. Wildenberg, American Structures, e-mail: asi@ameristruc.com
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