Metal Corrugated Duct · Prestressing Metal Corrugated Duct
Post-tension duct forming · compliant with JG/T 225-2020
Circular and flat metal corrugated ducts for reserving tendon holes in post-tensioned prestressed concrete, made of low-carbon galvanized steel strip with spiral folded seaming, strictly compliant with the current standard JG/T 225-2020 (Corrugated metal ducts for prestressed concrete). Standard (B) and enhanced (Z) types, supplied as a matched set with Taimao anchorage and tensioning equipment, serving Anhui and the broader East China region.
Upgrade “price-only” into a five-dimension comparison
- ✓Strictly compliant with the current standard JG/T 225-2020; standard (B) / enhanced (Z) types available
- ✓Low-carbon galvanized steel strip; tight seaming for leak resistance (holds 0.2MPa for 24h without seepage), safeguarding grouting compactness
- ✓Circular Φ40–120mm common sizes plus flat ducts, supplied as a matched set with 1–19-hole anchorage — duct, anchor and tensioning dimensions all matched
- ✓Each batch shipped with certificate of conformity, factory inspection report and type-test report — complete acceptance documentation
- ✕Off-brand ducts: thin nominal wall thickness, seam cracking and leakage, no guarantee of grouting compactness
- ✕Non-standard tubing: large dimensional deviation, mismatched with anchors / tensioning
- ✕Incomplete documentation: missing type-test report, acceptance stalls on site
Product specifications & ordering system
Round duct, common inner diameter Φ40mm to Φ120mm
Flat duct B3 spec, nominal wall thickness ≥0.35mm
Flat duct B4 spec, nominal wall thickness ≥0.35mm
Flat duct B5 spec, nominal wall thickness ≥0.35mm
Material: low-carbon galvanized steel strip
3 standard models
Detailed specs, order codes, test documents and accountability boundaries are available on request when you inquire.
Nominal wall thickness ≥0.28mm, general ducts
Nominal wall thickness ≥0.30mm, high tonnage / long ducts / dense vibration
Nominal wall thickness ≥0.35mm, thin flat-section members (minor×major axis on request)
Bridge box girders / continuous girders · floor slabs / frame beams / transfer floors · post-tension duct forming (matched set with Taimao anchorage + tensioning equipment)
Test reports, patents & delivery documentation
What is the national standard nominal wall thickness for metal corrugated ducts?
Shente's metal corrugated ducts strictly comply with the current standard JG/T 225-2020 (Corrugated metal ducts for prestressed concrete): standard type (B) ≥ 0.28mm nominal wall thickness, enhanced type (Z) ≥ 0.30mm, flat ducts ≥ 0.35mm.
How do metal corrugated ducts pair with prestressing anchors?
Shente's circular ducts in common sizes Φ40–120mm are supplied as a matched set with Taimao 1–19-hole anchorage — duct, anchor and tensioning dimensions are all matched and can be ordered together.
How is leak resistance verified for these ducts?
Made of low-carbon galvanized steel strip with spiral folded seaming, holding 0.2MPa for 24 hours without seepage; each batch ships with a certificate of conformity, factory inspection report and type-test report.
Need spec advice and a quote for Metal Corrugated Duct?
Tell us your working conditions, and our technical and sales teams will reply with spec advice, a standard quotation and a document list within our response-time commitments.
Shente is a specialist supplier of prestressing and related engineering materials. We provide material supply specifications and material selection advice; we do not replace the design or construction party in issuing structural calculations, construction schemes, or engineering quality conclusions.