Whalesbook
Indian engineering firms Welspun Corp and DEE Development Engineers are capitalizing on the US AI infrastructure push. As they supply critical piping and cooling systems, investors are tracking their capacity expansion and balance sheet health against global demand.
What Happened
The artificial intelligence revolution requires more than just high-end chips; it needs massive physical infrastructure to support cooling and power. Two Indian heavy engineering companies, Welspun Corp and DEE Development Engineers, have emerged as key suppliers for this global shift, particularly within the United States. Welspun Corp is supplying essential large-diameter pipes for natural gas pipelines that power data centers, while DEE Development Engineers is providing critical piping and cooling components for these facilities and gas turbines. Both companies are currently scaling their operations to meet this rising demand.
Welspun Corp and the US Market
Welspun Corp has established a significant presence in the North American market, holding an estimated 33-35% market share for large-diameter pipes. The demand for these products is driven by the need for reliable electricity in data centers, which are increasingly relying on gas-fired power plants. The company has secured strong revenue visibility, with its US spiral mill fully booked through fiscal year 2028. To capitalize on this, Welspun is actively expanding its footprint with two new facilities—a High-Frequency Induction Welding plant and a large-diameter LSAW plant—expected to increase capacity between fiscal year 2027 and 2028.
Financial performance has been strong, with Welspun reporting a 20% year-on-year revenue increase to ₹16,770 crore in fiscal year 2026. EBITDA grew by 28% to ₹2,371 crore, backed by a record consolidated order book of ₹25,350 crore. This order book serves as a critical indicator of future revenue potential.
DEE Development Engineers and Global Cooling Demand
DEE Development Engineers (DDEL) is focusing on the technical side of data center infrastructure, specifically providing rigid and metal piping solutions essential for cooling systems. The company is also a supplier of specialized alloy piping for Heat Recovery Steam Generator (HRSG) systems, which are vital components in modern gas turbines. Much of this work is centralized at its Thailand facility, which services global equipment manufacturers like GE, Siemens, and Mitsubishi. The company has secured 60% of its Thailand plant's capacity for a major international client, which provides a steady stream of job work with projected EBITDA margins above 20%.
In fiscal year 2026, the company recorded a revenue growth of 38% to ₹1,142 crore, while EBITDA surged 52.9% to ₹189.3 crore. With an order book of ₹2,434 crore as of May 31, 2026, the company has approximately two years of revenue visibility.
How Investors May Read This
While the demand narrative for AI infrastructure is strong, investors must consider the practical challenges of sustaining this growth. Both companies are currently trading at a premium to their historical averages and industry peers, which means the market has already factored in much of this growth. Future share price performance will depend heavily on the company's ability to manage execution risks, maintain profitability despite potential volatility in raw material costs, and successfully scale capacity without significant delays.
The Risk Factor
A primary point of focus for investors should be debt management. DEE Development Engineers currently carries a debt-to-EBITDA ratio of 3.8X. While the company intends to reduce this leverage through future free cash flow, high debt levels in a capital-intensive sector can limit financial flexibility if market conditions shift or if project timelines slip. Additionally, raw material price fluctuations remain a constant pressure point for engineering firms. Investors should also watch for supply chain disruptions, which could impact the timeline for commissioning new capacity.
What Investors Should Track
The next important phase for these companies is the successful commissioning of their new facilities and the conversion of their order books into realized revenue. For Welspun Corp, the key monitorable will be the progress of its new US plants and their ability to maintain market share. For DEE Development Engineers, investors may watch for updates on debt reduction and the sustained utilization of its Thailand facility. Management commentary on margin sustainability and raw material pricing will also be crucial for gauging long-term financial health.