HVAC Metal Duct Insulation Installation | HVAC Engineering

This article is about HVAC Metal Duct Insulation Installation as per international codes and standards.

HVAC Metal Duct Insulation Installation

1. “Duct joints shall be sealed prior to insulation. (SMACNA Para S 1.9)”
2. Mechanical fasteners, adhesive, tapes, metal straps or any other means at the intervals specified in the construction drawings or specifications shall be used in the installation of the duct insulation
   (UMC Para 604.3). “
3. Internal duct lining shall not be used, except in acoustically sensitive areas, with the prior approval of Chairman, HVAC Standards Committee.
   Exception: Internal lining, that includes protective coating to prevent erosion, is permitted for terminal boxes and air handling units.”
4. Duct liners in systems operating with air velocities exceeding 2,000 feet per minute (10.2 m/s) shall be fastened with both adhesive and mechanical fasteners
   Note: Air velocities may be read from the contract specification or Drawings. However, if the air velocities are not shown, the expected air velocity at the concerned duct section (s) shall be provided by SAPMT through designers “
5. Ducts shall be insulated in accordance with Table 6-D of the Uniform Mechanical Code. See attachment no. 1
6. Insulation installed outdoor shall be protected from moisture and sunlight degradation by an approved and acceptable method  (Material and Method shall be approved by Saudi Aramco prior to application)”
7. Insulation applied to the exterior surface of ducts located in buildings shall have a flame spread index of not more than 25, smoke density index not exceeding 50 when tested as a composite installation including insulation, facing material, tapes and adhesive as normally applied. (UMC Para 604.3)

Standards Codes and References HVAC Metal Duct Insulation Installation

1- SAES-K-001 — Heating, Ventilating and Air Conditioning (HVAC)
2- SAES-K-100 — Saudi Aramco Mechanical (HVAC)
3- Uniform Mechanical Code (UMC)

4- SMACNA – HVAC Duct Construction Standards, Metal & Flexible.

HVAC Metal Duct, Hangers and Supports and Insulation Receiving

GENERAL INSTALLATION NOTES ABOUT TRAY ASSEMBLY IN TOWER

HVAC Metal Duct Installation | HVAC Engineering

HVAC Duct System Handling, Storage and Preservation

Attachment 1 – Table 6-D Insulation of Ducts as per Uniform Mechanical Code (UMC) 

 

Insulation Types as per UMC Uniform Mechanical Code