Midland, Michigan-Dow Polyurethanes plans a 30-day closure of its Brazilian plant for making TDI (toluene diisocyanate) for routine maintenance, starting on 10 April. The plant has a nameplate capacity of 60 kilotonnes per annum.The "turnaround" will involve equipment inspections, repairs and replacements, according to a 2 April statement posted on the firm's website.The move comes at a time when TDI supply is tight, following a series of cutbacks in production from older, smaller units as well as difficulties at other TDI facilities, including Dow's unit in Freeport, Texas. "While periodic turnarounds are anticipated across the industry, they put additional pressure on an already tight supply," said Steven English, business director for Dow Isocyanates, a business unit within Dow Polyurethanes, in the posted statement. "As we do with every planned shutdown, Dow has been building inventory in advance to supply our customers with TDI while the turnaround is in progress and to minimise the potential for disruption," his statement added.Dow recently announced that it is conducting a joint feasibility study with BASF to determine the construction of a state-of-the-art TDI production plant at one of its integrated sites in Europe."Dow is committed to the polyurethanes industry and routine maintenance turnarounds are critical to ensuring the long term safety and performance of our plants," added English. "By providing top-of-the-line maintenance and by continuously evaluating new sources for TDI, we feel that we are able to provide customers with the best long term service and supply possible," his statement concluded."