New Silo Construction Technology Safe Storage for Solid, Liquid or even Gaseous Substances
Traditional methods of storage tank or silo construction, whether in concrete or steel, present a number of Health and Safety challenges on site. Martin Grant of Lipp Systems explains how an alternative technology is minimising these risks, while at the same time providing a faster and more convenient method of construction.
In industry, agriculture and water utilities, the proper storage and processing of solids and liquids places extremely demanding requirements on the holding tank, especially if toxic or aggressive substances are likely to be present. This means that their fabrication and erection are critical processes that cannot be compromised. Adding to this complexity of large tank builds is compliance with Health and Safety regulations, such as The Working at Heights Regulations introduced in 2005, which have played such an important role in reducing on site accidents.
In concrete tank construction, whether jumpforming, slipforming or building from pre-cast blocks, working at height is an inevitable part of the process, as it is with large, bolted steel section, tanks. It is against this background of more traditional, complex tank construction methods that an alternative system of tank and silo building has come to the fore. At its foundation is the Dual-Seal System for joining metal. Developed by Lipp, this patented system is based on a double edge folding principle to ensure optimum, safe storage for solid, liquid or even gaseous substances.
Steel Composite Gives Tanks its Strength
While the sealing system is innovative, the assembly process that it enables is even more so, and the Lipp Dual-Seam System is believed to be the fastest, simplest way to build reliable containers and tanks. The size of the containers is variable anywhere between 3 m and over 40 m in diameter, with tank heights of up to 40 m.
A key part of the tank’s strength comes from the steel composite used in construction. The steel composite, Verinox, uses galvanised steel on the outer layer and stainless steel on the inner, providing both strength and corrosion resistance at sensible costs. The process starts with the fabrication of the appropriate quantity of Verinox composite stainless steel band, supplied on site in a coil. Also delivered to the site is the transportable assembly system, conceived and developed by Lipp. The composite steel band is fed into the assembly device at ground level, which begins to mechanically pull the band through it. As the steel band rotates through the assembly device, the storage tank cylinder emerges, spiralling upwards from ground level with the assembly device forming the Dual-Seam seal as it goes.