Schedule 40 Pipe

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Shop Schedule 40 pipe for commercial, industrial, process, and mechanical piping applications. PipingNow carries Schedule 40 stainless steel pipe in both seamless and welded options, with sizes ranging from 1/4 in to 18 in. Available material grades include 304L stainless steel, 316L stainless steel, 304H stainless steel, 321H stainless steel, and 2205 duplex stainless steel. Schedule 40 pipe, often searched as Sch 40 pipe or Schedule 40 steel pipe, is commonly used where a heavier wall than Schedule 10 is required but where the application does not call for heavier schedules such as Schedule 80 or Schedule 160. This page is focused specifically on Schedule 40s stainless steel pipe so buyers can quickly narrow the catalog by wall schedule, pipe construction, size, and material grade. Welded and Seamless Schedule 40 Pipe This collection includes both welded Schedule 40 pipe and seamless Schedule 40 pipe. Welded pipe is manufactured with a longitudinal seam and is commonly used in a wide range of general piping applications. Seamless pipe is produced without a welded seam and is often selected for applications where the specification calls for seamless construction, higher integrity, or specific pressure and temperature requirements. When selecting between welded and seamless Schedule 40 pipe, always follow the project specification, applicable code requirements, pressure and temperature conditions, and the intended service environment. Available Stainless Steel Grades PipingNow offers Schedule 40 stainless steel pipe in several grades to match different service requirements. 304L stainless steel is a common general-purpose stainless option. 316L stainless steel offers improved corrosion resistance and is often used in more demanding environments, chemical exposure, marine conditions, and process piping applications. High-temperature stainless options such as 304H and 321H may be used where elevated temperature performance is required. 2205 duplex stainless steel prov