ISO 9001
SMACNA
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Product Code: CEI-GSD / Rectangular & Spiral Circular
Galvanized Steel Duct Works
مجاري هواء جلفانيز
Galvanized steel rectangular and spiral circular ductwork — fabricated to SMACNA & DW142/144 standards using CNC Coil Line and Plasma Cutting machines at Castle Abu Rawash facility.
Frame Material
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ISO 9001:2015SMACNADW144
Description
Product Description
Air Ducts are the pathway for heated/cooled air to travel throughout a house, building or tower — carrying supply air, return air and exhaust air while ensuring acceptable indoor air quality and thermal comfort. DuctCastle ducts are available in Circular, Spiral and Rectangular shapes, made of sheet metal.
CNC Coil Line Production
Straight rectangular ducts cut and folded through CNC Coil Line Machine. Standard duct length 1220mm. Stiffener applied to outer middle when required.
Plasma CNC Fittings
All fittings (elbows, tees, reducers, offsets) cut by Plasma CNC machine into individually marked and nested pieces — minimizing material loss.
SMACNA & DW142/144 Compliant
All fabrication complies with SMACNA and DW142/144 Standards. Longitudinal seams: Pittsburgh Lock (GI up to 16 gauge) and Grooved Corner (GI up to 18 gauge).
Transverse Joint Options
Slip & Drive (Hemmed "S" C1/T-6), Standing "S" (T-10, T-13, T-14), Companion Angles (J3–J6), and Slide-on TDF/DM Flange systems available.
Acoustic Liner Option
Internal acoustic liner installation per SMACNA. Z-Section liner standard; L-Section alternative. Welding pins at 3" (76mm) spacing. Metal nosing at all leading edges above 4000 FPM.
Complete QA/QC System
Every item barcoded and tagged with Tag No., PO reference, material type, gauge, weight, area, connector type. QA/QC passed/rejected tag issued before delivery.
Specifications
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Materials Available | Galvanized Steel (GI) · Stainless Steel (SS) · Black Steel (BS) · Aluminium (AL) | — |
| Rect. Duct Straight Length | Standard 1220mm (Coil Line) | mm |
| Spiral Duct Diameters | 100mm to 1400mm | mm |
| GI Thickness (Spiral Ø100–250mm) | 0.6mm | mm |
| GI Thickness (Spiral Ø280–355mm) | 0.7mm | mm |
| GI Thickness (Spiral Ø400–600mm) | 0.8mm | mm |
| GI Thickness (Spiral Ø630–1100mm) | 1.0mm | mm |
| GI Thickness (Spiral Ø1120–1400mm) | 1.2mm | mm |
| Longitudinal Seams | Pittsburgh Lock · Grooved Corner · Grooved Seam | SMACNA |
| Transverse Joints | Slip & Drive · Standing "S" · Companion Angles · TDF/DM Flange | SMACNA |
| Pressure Ratings | 1" WG · 2" WG · 3" WG · 4" WG — per SMACNA 3rd Edition Tables | in.wg |
| Standards | SMACNA (2nd & 3rd Edition) · DW142/144 · ASTM A653 G90 | — |
| Country of Origin | Egypt | — |
Applications
Fields of Application
Commercial & Industrial HVAC Projects
Quality Assurance
Tests & Certificates
ISO Certification
International Quality Certifications
ISO 9001:2015
ISO 14001:2015
OHSAS 18001
International Standards
SMACNA · DW144 · IGC · UL
SMACNA
DW144
IGC
UL
Duct Test
Rigorous leakage and pressure testing to SMACNA and DW144 standards.
Duct Test 01
Duct Test 02
Duct Test 03
Air Tests
Air velocity and distribution testing.
Air Test 01
Air Test 02
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