Schedule 40 Pipe

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 provides high strength and strong corrosion resistance for more demanding applications. The right grade depends on the fluid, temperature, pressure, corrosion exposure, and project specification.

Schedule 40 Pipe Sizes

This collection includes Schedule 40 pipe sizes from 1/4 in through 18 in. Common sizes include 1/2 in, 3/4 in, 1 in, 1-1/2 in, 2 in, 3 in, 4 in, 6 in, 8 in, 10 in, and 12 in. Use the size filters on this page to narrow the collection to the pipe size required for your job.

Pipe Schedule	Pipe Types	Size Range	Available Materials
Schedule 40s	Seamless Pipe, Welded Pipe	1/4 in to 18 in	304L Stainless Steel, 316L Stainless Steel, 304H Stainless Steel, 321H Stainless Steel, 2205 Stainless Steel

How to Choose Schedule 40 Pipe

Start by confirming the required nominal pipe size, wall schedule, material grade, and pipe construction. If the job calls for Schedule 40s stainless steel pipe, use this page to narrow the selection by size, welded or seamless construction, and material. For many general stainless piping applications, 304L or 316L are common choices. For high-temperature or more specialized applications, review the requirements for 304H, 321H, or 2205 duplex stainless steel.

Before ordering, confirm the pipe schedule, material grade, dimensions, pressure requirements, temperature requirements, and any applicable ASTM, ASME, or project specifications. If material documentation is required, review the product details or request the necessary documentation before purchasing.

Schedule 40 Pipe vs. Other Pipe Schedules

Pipe schedule refers to the wall thickness of the pipe. Schedule 40 is heavier than lighter-wall options such as Schedule 5s or Schedule 10s, but it is not as heavy as Schedule 80, Schedule 160, or XXH pipe. The correct schedule depends on the system design, pressure, temperature, fluid, and specification requirements.

This page is built specifically for Schedule 40 pipe. For other wall schedules, use the schedule filters or visit the appropriate pipe collection to compare available options.

Related Pipe Categories

All Pipe | Seamless Pipe | Welded Pipe

Schedule 40 Pipe FAQs

What is Schedule 40 pipe?

Schedule 40 pipe is pipe manufactured to a specific wall thickness range based on nominal pipe size. It is commonly used in commercial, industrial, process, and mechanical piping systems.

What does Sch 40 pipe mean?

Sch 40 is a common abbreviation for Schedule 40. Buyers may also search for Schedule 40 pipe, Sch 40 pipe, Schedule 40 steel pipe, or Sch 40 steel pipe.