BHEL despatches ceiling girder

Bharat Heavy Electricals Limited, Tiruchi, on Saturday despatched the first main ceiling girder of its new fully bolted design for the 3x660 MW super critical steam generator being supplied by it to NTPC’s North Karanpura Thermal Power Station at Tandwa in Jharkhand. The massive consignment was flagged off by S. Gopinath, Executive Director, BHEL Tiruchi, at a function held at BHEL’s outsourcing partner Master Fab Engineering Industries at Devarayneri. According to a BHEL release, the ceiling girder assembly is the main load-bearing structure which supports the entire set of boiler pressure parts which are suspended from it. Each 660 MW boiler at North Karanpura project will have seven such main girders weighing 56 tonnes measuring 33 m in length, 4.5 m in height, flange thickness of 115 mm and are largest sizes supplied by BHEL so far. The structure will have three end girders and 109 cross beams. A total of 12,196 high tensile bolts in seven different sizes are used to bolt the structure together. High precision, accurate alignment and the multiplying effect of close tolerances are the challenges faced in the fabrication and drilling of bolted structures. ref: http://www.thehindu.com/news/cities/Tiruchirapalli/bhel-despatches-ceiling-girder/article8263259.ece