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136 
Handling chemicals with care
Page 41
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Protective clothing is worn during discharge of sulphur trioxide — used in the making of detergents — from this new Atkinson/Universal tanker outfit operated by Albright and Wilson Ltd's Marchon Division, Whitehaven. The Cummins 220-engined Borderer has a Fuller Roadranger 10-speed gearbox, and its safety fittings include a Shureguide steering stabilizer in case of front tyre blow-outs and a Hope anti-fackknife device. The ADRITIR-approved tank is mounted on Crane Freuhailf running gear and was built by Universal Bulk Handling Equipment Ltd, Burscough, Lancs. Payloads of 18 tons can be carried in the single-compartment 2600ga1 tank, which has a barrel of lOmm stainles steel surrounded by Isopad electric heating blankets and a 4in. layer of glassfibre insulation. Sulphur trioxide has to be carried within a temperature range of 16.8 deg C (its freezing point) and 44.8deg C (its boiling point) and must not be allowed to come into contact with water, otherwise it give off dense white sulphuric acid fumes in a violent reaction. Cab eauipment includes safety clothing, a self-contained breathing kit and a Tremcard which is additional to two displayed externally. Load discharge is normally by external compressed air but at premises without this facility it can be discarged by the tractor-mounted Drumbeat compressor; a silica gel moisture extractor is part of the equipment.