India, Sept. 25 -- India's largest line pipe manufacturer has just pulled off its biggest order in forty years of operation. A US subsidiary contract, worth hundreds of millions of dollars, will keep an upgraded American mill running well past the middle of the decade. And that's not even the headline number; the company's overall order book has now crossed territory it's never touched before. What that means for margins, delivery timelines, and the next few quarters is the part worth watching.

Shares of Welspun Corp Ltdare trading at Rs. 2,787.40, up 3.54 percent on Friday. The stock touched the intraday high of Rs. 2,836.50 after opening at Rs. 2,752.90 before slipping to a low of Rs. 2,752.90. The company commands a market capitaliza...