Galvanised Steel Spiral Ducting adopts hot-dip galvanized steel coil as raw material. Through spiral rolling lock-seam forming process, continuous spiral seam improves overall stiffness, reduces airflow turbulence and pressure loss. Available diameter range: 80-1500 mm, sheet thickness 0.5-1.2 mm. Standard single-piece length can be 3-6 m or custom fixed-length cutting.
It supports slip-in coupling connection or flange connection, reaching Class-D air tightness for ventilation ductwork. Matching accessories include elbows, reducers, tees, end caps and clamps for complete ventilation pipeline layout. Products comply with EN1506, EN12237, GB50243 industry standards. We offers drawing review, size optimization suggestion, pre-shipment sample inspection and complete technical document supply for overseas projects.
Project Delivery Process
Requirement & Drawing Confirmation
Confirm duct diameter, sheet thickness, total length, fitting list, working pressure and connection mode according to customer drawings; sort out technical parameters and quotation.
Production Arrangement
Raw galvanized steel sheet incoming inspection, spiral forming, cutting, deburring, accessory processing. Carry out dimensional inspection for each batch.
Pre-delivery Inspection
Random sampling for air-tightness test, dimension re-check, appearance inspection to remove dents, burrs and galvanized layer damage.
Packing Operation
Duct mouths protected by plastic caps; products bundled with soft wrapping to prevent galvanized surface scratch in transit.
Container Loading & Shipment
Classify straight ducts and fittings for container loading, add anti-rolling buffer measures; issue full set of packing list, material test reports for customs clearance.
Document Hand-over & Technical Support
Deliver installation suggestion document; provide remote consultation for on-site assembly and air-tightness testing.
Product After-sales
1. Quality Warranty: Under normal installation & operating environment, galvanised steel spiral ducting enjoys standard warranty against manufacturing defects. Damage caused by man-made collision, chemical corrosion and improper installation is excluded.
2. Remote Technical Consultation: Online support for pipeline layout inquiry, connection skill guidance and common-fault analysis during installation phase.
3. Spare-parts Supply: Provide supplementary supply for damaged fittings or short-quantity components with competitive lead-time.
4. Optional Third-party Witness Service: Arrange third-party factory inspection before shipment upon client request.
5. Application Maintenance Tips: Offer suggestions for regular dust cleaning and surface inspection, extend service life of whole ventilation network.
FAQ
Q: What connection options are available for these spiral ventilation ducts?
A: Slip-in coupling with sealing gasket is preferred for low-medium pressure ventilation system; flange connection is recommended for high-pressure or heavy-duty industrial exhaust pipelines.
Q: What core specifications need confirmation when ordering galvanised steel spiral ducting?
A: You need to confirm duct outer diameter, galvanized sheet thickness, single-piece length, required fitting list, operating pressure and preferred connection method for accurate quotation and production scheduling.
Q: Can you produce supporting duct fittings together with straight spiral ducts?
A: Yes. Elbows, tees, reducers, end caps and clamps can be manufactured with same galvanized material standard, ensuring matching dimension and air-tightness performance for whole ventilation system.
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