Introduction to Schedule 40 Steel Pipe
When it comes to industrial piping, schedule 40 steel pipe is one of the most widely recognized standards. The term "schedule" refers to the wall thickness of the pipe, which directly affects its pressure rating, durability, and weight. Among the different pipe schedules, schedule 40 pipe is considered a common and versatile choice, making it ideal for plumbing, construction, oil and gas, and mechanical systems.
For engineers, contractors, and procurement specialists, understanding sch 40 pipe thickness, schedule 40 wall thickness, and the weight of schedule 40 steel pipe is essential for accurate design, material selection, and cost estimation.
At Huayang Steel Pipe, we manufacture and supply high-quality ERW steel pipes and LSAW pipes that meet international standards, including ANSI, ASTM, and API. Our schedule 40 pipes are available in a wide range of sizes, wall thicknesses, and weights, ensuring customers find the right product for their specific applications.


Understanding Schedule 40 Pipe Thickness
The wall thickness of a pipe determines its strength and pressure capacity. Schedule 40 pipe thickness varies depending on the pipe's nominal diameter (NPS). For example, a 1-inch schedule 40 pipe thickness in mm is approximately 2.77 mm, while a 6-inch pipe has a thickness of 7.11 mm.
This difference shows why sch 40 pipe thickness is not fixed but increases with the pipe's diameter to maintain strength and safe pressure handling. Engineers rely on these standardized values to design safe and efficient piping systems.
Key points about schedule 40 wall thickness:
- It provides a balance of strength and affordability.
- It is widely used in both commercial and industrial settings.
- It is suitable for moderate pressure and temperature applications.
Schedule 40 Pipe Size Chart
To make the selection process easier, engineers often consult a schedule 40 pipe size chart. This chart provides details on outside diameter (OD), wall thickness, and weight per unit length. By referring to the chart, professionals can quickly identify the correct size of pipe needed for their project.
Below is a simplified schedule 40 pipe size chart for reference:
| Nominal Pipe Size (NPS) | Outside Diameter (OD) mm | Schedule 40 Pipe Thickness (mm) | Schedule 40 Steel Pipe Weight per Foot (kg/ft) |
|---|---|---|---|
| 1/2 inch | 21.34 mm | 2.77 mm | 0.85 kg/ft |
| 1 inch | 33.40 mm | 3.38 mm | 1.68 kg/ft |
| 2 inch | 60.33 mm | 3.91 mm | 3.65 kg/ft |
| 4 inch | 114.30 mm | 6.02 mm | 10.79 kg/ft |
| 6 inch | 168.28 mm | 7.11 mm | 18.99 kg/ft |
| 8 inch | 219.08 mm | 8.18 mm | 28.55 kg/ft |
This table highlights how schedule 40 pipe thickness increases with pipe size, and how this impacts the sch 40 pipe weight per foot.
Schedule 40 Steel Pipe Weight per Foot
The schedule 40 steel pipe weight per foot is a crucial factor for both structural calculations and logistics planning. Knowing the weight of schedule 40 steel pipe helps in estimating load-bearing capacity, transportation requirements, and overall project costs.
For example:
- A 2-inch schedule 40 pipe weight per foot is approximately 3.65 kg.
- A 6-inch pipe weighs around 18.99 kg per foot.
- Larger sizes, like 12-inch pipes, can weigh over 50 kg per foot.
This variation demonstrates why accurate knowledge of sch 40 pipe weight per foot is vital when planning large-scale projects. Heavy-duty cranes and transportation equipment are often needed to handle these pipes safely.
At Huayang Steel Pipe, we provide clients with detailed weight charts for all sizes of schedule 40 steel pipe, ensuring accurate planning and efficient execution of projects.
Applications of Schedule 40 Steel Pipe
The widespread use of schedule 40 steel pipes is due to their balance of affordability, availability, and performance. Typical applications include:
- Construction: Used as structural supports, columns, and frameworks.
- Plumbing: Suitable for water distribution and drainage systems.
- Oil and Gas: Commonly applied in medium-pressure pipelines.
- Fire Protection Systems: Reliable for sprinkler and safety installations.
- Mechanical Systems: Used in HVAC, compressed air, and machinery piping.
Thanks to its durability, schedule 40 pipe thickness makes it suitable for long-term service in both indoor and outdoor environments when coated or galvanized.
Conclusion: Huayang's Advantage in Schedule 40 Steel Pipe
Choosing the right pipe involves more than just diameter-it requires precise knowledge of schedule 40 pipe thickness, schedule 40 pipe size chart, and schedule 40 steel pipe weight per foot. At Huayang Steel Pipe, we supply a full range of schedule 40 pipes manufactured to ANSI, ASTM, and API standards.
With decades of expertise, advanced production facilities, and strict quality inspection systems, Huayang ensures reliable products that meet the demands of industries worldwide. Whether your project requires small-diameter pipes for plumbing or large-diameter pipes for oil and gas pipelines, we deliver consistent quality and competitive pricing.
For technical support, size charts, or bulk orders, contact Huayang Steel Pipe today and let us provide the most efficient solution for your piping needs.


