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EMT (Electrical Metallic Tubing) steel pipe mill is a manufacturing facility that produces EMT conduit pipes, which are widely used for electrical wiring protection in commercial, industrial, and residential applications. EMT steel pipes are known for their lightweight construction, corrosion resistance, and ease of installation. These pipes are typically made from galvanized steel or coated with zinc to enhance durability.
The production of EMT steel pipes involves several precise steps to ensure quality, durability, and compliance with industry standards.
1. Raw Material Selection
High-quality low-carbon steel coils are used to manufacture EMT pipes.
The steel undergoes testing for thickness, composition, and tensile strength.
2. Cold Rolling & Forming
Steel coils are uncoiled, flattened, and fed into a forming machine.
The machine gradually bends the steel into a cylindrical shape before welding.
3. High-Frequency Welding (ERW - Electric Resistance Welding)
The edges of the rolled steel are heated and fused together using high-frequency current.
A seamless, smooth weld is created, ensuring structural integrity.
4. Galvanization or Zinc Coating
The welded pipes undergo hot-dip galvanization or electro-galvanization to protect against rust and corrosion.
A smooth, uniform zinc coating ensures long-lasting durability.
5. Sizing & Cutting
The pipes pass through a sizing mill to ensure the correct diameter and wall thickness.
They are then cut to standard lengths (often 10 or 20 feet).
6. Surface Treatment & Threading
The pipes are cleaned and may be given a chromate coating for extra corrosion resistance.
Some EMT pipes are threaded for specific fittings and connectors.
7. Testing & Quality Control
Pipes undergo rigorous mechanical, chemical, and dimensional testing.
Tests include bending, flattening, pressure resistance, and coating thickness checks.
8. Packaging & Distribution
Finished EMT pipes are bundled and shipped to distributors, wholesalers, and construction sites.
Hot tag: EMT Steel Pipe Mills Manufacturers&Suppliers Factory China.
