Spiral Duct Corrugated Pipe Metal Steel Pipe

Spiral Duct, Corrugated Pipe, and Metal Steel Pipe are three distinct yet widely used piping/ductwork products, each engineered with unique structural designs to meet specific functional needs in ventilation, fluid transmission, and structural support. Their core characteristics are detailed by product type below:

Metal bellows

Metal bellows are continuous/non-cracked/non-leaking 1.Smooth cut 2.Stable performance

3.Easy to install and use

Various specifications can be customized

1.The surface is bright and has no burrs.

2.The product has good pressure resistance and can bear the weight of an adult.

3.It has good sealing and is safe to use without leakage.

1.Good bending performance. The corrugated tube body is bendable, which is easy to install. Use PVC + metal hose to effectively protect the cable.

2.Wear-resistant The plastic-coated hose is made of thickened material, which greatly improves the tensile strength of the hose

The plastic-coated hose is made of thickened material, which greatly improves the tensile strength of the hose

3.High temperature resistant The surface of the plastic coated hose is made of PVC material and fire retardant is added to the PVC plastic

Spiral Duct

a. Efficient Airflow & Low Resistance

• Smooth Inner Surface: The spiral-wound structure creates a seamless, smooth inner wall (surface roughness Ra ≤ 10μm), minimizing air friction and turbulence during transmission. Compared to rectangular ducts, it reduces airflow resistance by 20%–30%, lowering energy consumption of fans and improving HVAC system efficiency.

• Uniform Air Distribution: The cylindrical shape ensures even air velocity across the cross-section, avoiding dead zones or uneven pressure drops. This makes it ideal for large-space ventilation (e.g., shopping malls, factories, airports) where consistent air supply is critical.

b. High Structural Stability & Strength

• Spiral Lock-Seam Design: The continuous spiral seam enhances the duct’s radial and axial strength—its compressive strength is 30% higher than that of straight-seam cylindrical ducts of the same thickness. A 500mm-diameter spiral duct (0.8mm wall thickness) can withstand an external pressure of up to 2500Pa without deformation, suitable for suspended installation in high-ceiling buildings.

• Lightweight & Material-Saving: The spiral forming process optimizes material usage—for the same airflow capacity, spiral ducts use 15%–20% less metal than rectangular ducts. This reduces the overall weight of the ductwork, simplifying suspension and lowering structural load on buildings.

c. Easy Installation & Sealing

• Long Standard Lengths: Available in lengths up to 12m (vs. 3–6m for rectangular ducts), minimizing the number of joints. Fewer connections reduce installation time by 40% and lower the risk of air leakage at seams.

• Reliable Sealing Options: Compatible with specialized sealing methods (e.g., spiral duct gaskets, aluminum foil tapes, or mechanical clamps) to achieve air leakage rates as low as ≤2% (meeting ASHRAE 90.1 standards). This ensures energy efficiency and prevents cross-contamination of air in cleanrooms or laboratories.

d. Corrosion Resistance & Versatility

• Material Choices for Environments:

• Galvanized steel spiral ducts: Cost-effective, suitable for dry indoor environments (e.g., office HVAC systems);

• Stainless steel (304/316L) spiral ducts: Excellent corrosion resistance, used in humid or corrosive areas (e.g., food processing plants, coastal buildings);

• Aluminum spiral ducts: Lightweight and rust-proof, ideal for cleanrooms or decorative applications (e.g., shopping mall atriums).

• Customizable Sizes: Diameters range from 100mm (small office ventilation) to 2000mm (industrial exhaust), with wall thicknesses of 0.5mm–2.0mm to match airflow and pressure requirements.

How long is your delivery time?

Samples:7-10working days;bulk production:10-15 working days. lt also should bedepend on what kind of product and the quantity you require

Do you provide samples, is it free or extra?

Yes,We'd like to provide samples before the bulk production,for the custom metalstamping samples it can be free after making mold;Yes, we can do OEM according to yourrequirement.Do you provide ODM/OEM service? Yes,OEM /ODM is welcome, Please feel free tosend us your drawing or sampleslf

You make poor quality goods,will you refund ourfund?

As a matter of fact,we wont take a chance to do poor quality products. Meanwhile,wemanufacture goods quality products until your satisfaction.

Are you making by yourself?

Yes, we are. we have our own factoryand showroom. Warmly welcome to visitingour factory at any time.

What is your terms of payment?

T/T,30% as deposit,and 70% balancebefore delivery

How can i get the quotation?

Please send us information for quote; drawing,material,weight,quantity andrequest,we can accept PDF.SGS,DwGSTEP file format, lfyou don't have drawing,please send the sample to us,we can quote base on your sample too