Welspun Corp Ltd, engaged in manufacturing steel pipes, has jumped by over 20 per cent to hit the upper circuit and create a fresh 52-week high, from its previous close of Rs 208.75. The stock opened at Rs 09.60 and has made its day high of Rs 250.50, where the trading in stock is halted and which is also its fresh 52-week high. It was today’s top gainer from the A group.