SCH 40 galvanized pipe

SCH 40 Galvanized pipe refers to a galvanized steel pipe wall thickness grade that meets American standards, where Sch 40 stands for standard weight pipe, and its wall thickness varies depending on the pipe size.

Meaning of SCH 40:

SCH (Schedule) is the wall thickness grade standard of the American standard ANSI/ASME B36.10. The larger the number, the thicker the pipe wall. SCH 40 belongs to medium wall thickness, thicker than SCH 10 and thinner than SCH 80, suitable for general pressure requirements. The wall thickness of different pipe diameters is different (for example, DN15 is about 2.77mm, DN100 is about 6.02mm).

Manufacturing process of SCH 40 galvanized pipe:

Galvanized pipe is based on ordinary steel pipe, and a layer of zinc is plated on the surface through the galvanizing process. This treatment not only enhances the corrosion resistance of the pipe, but also prolongs its service life. Galvanized pipe sch40 can be either seamless pipe or welded pipe, which mainly depends on the type of its original steel pipe.

1. Seamless pipe: Seamless steel pipe is made by hot rolling or cold drawing process, and there is no weld on its inner and outer surfaces. Galvanized seamless steel pipe is galvanized on the basis of seamless steel pipe. The advantages of seamless pipe are high strength and good pressure bearing capacity, which are suitable for harsh environments such as high pressure and high temperature.

2. Welded pipe: Welded steel pipe is made by curling and welding steel plate or steel strip. Galvanized welded steel pipe is galvanized on the basis of welded steel pipe. The advantages of welded pipe are low production cost and high production efficiency, which are suitable for general environments such as low pressure and low temperature.

Galvanizing process:

Galvanizing treatment can be divided into hot-dip galvanizing and cold-dip galvanizing according to the production process.

a. Hot-dip galvanizing: The steel pipe is immersed in molten zinc liquid to form a zinc layer, which is rust-proof and corrosion-resistant.

b. Electro-galvanized: The zinc layer is thinner and suitable for light corrosion environments.

Advantages: Extend the life of the steel pipe, suitable for outdoor, humid or corrosive environments, such as building water pipes and guardrails.

Applications of SCH 40 galvanized pipes:

Construction: water supply pipes, fire protection pipes, HVAC pipes
Industry: compressed air, low-pressure gas delivery
Structure: scaffolding, guardrails, support frames
Agriculture: irrigation systems, greenhouse supports

How to choose the type of galvanized pipe SCH 40?

When choosing galvanized pipe SCH 40, you should choose seamless pipes or welded pipes according to the specific use environment and needs. If you need to withstand high pressure, high temperature or for special medium transportation, it is recommended to choose seamless pipes; if it is generally used in low pressure, low temperature environment, and there are certain requirements for cost, you can choose welded pipes.

Alternative options:
SCH 80 galvanized pipe: higher pressure bearing, but heavier and more expensive.
Stainless steel pipe: stronger corrosion resistance, but high cost.
PVC pipe: low pressure, no corrosion requirements, light and cheap.

Conclusion:

SCH 40 galvanized pipe is a medium-walled galvanized steel pipe suitable for construction, water supply, industry and other fields, with good rust resistance and pressure bearing performance. When purchasing, you need to pay attention to the standards, manufacturing process, zinc layer quality and applicable environment.

Read more: Sch 40 seamless pipe or MS and GI Pipe Difference