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Sandhya design consultancy is one of the leading design consultancy started in 1963 founded by late Subrmanyam Roy, presently our branches in United States(u.s), Dubai uae and India.. Total employees 143, Total turnover 2018 , 20 M$ We provide design calculations and detailing CAD drawings for petroleum , OIL & GAS, REFINERIES, PETROCHEMICALS, etc-