In industrial waste gas treatment, many people focus on the "visible" equipment like purification towers, fans, and activated carbon chambers, but overlook a crucial supporting role: the spiral steel pipe for ventilation ducts. In fact, it functions like the "blood vessels" of the system, directly determining whether exhaust gas can be efficiently and safely treated.

First, what is unique about the structure of spiral steel pipe?
Spiral steel pipe is a thin-walled steel pipe with a spiral seam formed by rolling a metal strip. It is manufactured entirely by machine with no welds. Compared to traditional welded steel pipe, it offers improved airtightness, with a leakage rate as low as less than 1% (national standard ≤5%), which is particularly important when transporting toxic and hazardous gases.

Second, what are the performance advantages of spiral steel pipe?
1. High Pressure Resistance: The spiral seam creates continuous reinforcement ribs, increasing the pressure-bearing capacity by over 30% compared to rectangular ducts. A 300mm diameter spiral steel pipe can withstand 3000Pa without deformation. 2. Significant Energy Savings: Circular cross-sections offer uniform air velocity distribution, eddy current resistance is 40% lower than rectangular ducts, pressure loss is 15-20% lower, and annual operating energy consumption can be reduced by 8-12%.
3. Fast Installation: Socket-type flange connections are three times faster than traditional flanges, allowing a single person to install 30-50 meters per day, shortening the construction cycle.

Third, Which Industries Require Spiral Steel Pipes?
• Chemical Industry: Corrosion-resistant stainless steel pipes can transport acidic and alkaline waste gases.
• Electronic Manufacturing: Low dust accumulation and excellent sealing ensure cleanroom operation.
• Food Processing: Smooth, easy-to-clean interior meets hygiene standards.
• Spray Printing: Resistant to organic solvents, safe, and reliable.

Fourth, Frequently Asked Questions
Q: How much more expensive is spiral steel pipe than regular duct?
A: The initial investment is slightly higher (approximately 10-20%), but the energy savings and low maintenance costs pay for themselves within 1-2 years.

Q: Does spiral steel pipe easily accumulate dust?
A: The circular duct has a smooth inner surface, is less prone to dust accumulation, and has a longer maintenance cycle than rectangular ducts.

Q: Does installing spiral steel pipe require special skills?
A: The standard modular design allows for easy installation by a standard installation team, but it is recommended to hire an experienced contractor to ensure a secure seal.

In summary, in exhaust gas treatment systems, spiral steel pipes are not only used to connect equipment but are also crucial for ensuring environmental performance and reducing operating costs. Choosing the right one provides a double insurance policy for your exhaust gas treatment system.