Manufacturing of ventilation ducts

NegotiableUpdate on 02/15

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Overview

Ventilation ducts are a type of municipal infrastructure designed to facilitate air circulation and reduce the concentration of harmful gases

Product Details

Ventilation ducts are a type of municipal infrastructure designed to facilitate air circulation and reduce the concentration of harmful gases. The plates, profiles, and other main finished materials used for the production and installation of air ducts shall comply with the current national standards for design and related products, and shall be accompanied by factory inspection certificates. The materials shall be inspected and accepted in accordance with the relevant national standards upon arrival.
There are many types of materials and shapes,Generally, there are:steel plateDucts (ordinary steel plate), galvanized sheet (white iron) ducts, stainless steel ventilation ducts, fiberglass ventilation ducts, plastic ventilation ducts, composite material ventilation ducts, color steel sandwich insulation board ventilation ducts, double-sided aluminum foil insulation ventilation ducts, single-sided color steel insulation ventilation ducts, adhesive coated ventilation ducts (such as mining ducts), mining plastic ventilation ducts, etc;
Common appearanceCircular, rectangular, spiral, etc;
The types of connections for ventilation ducts are generally divided into two categories:Angle iron flange air duct, common plateflangeAir duct.
Common places where air ducts are used include:

1. Purificationair-conditioning systemUse air ducts: galvanized sheet, stainless steel; Glass fiber reinforced plastic and composite materials that may cause dust source pollution during use are prohibited

2. Air ducts for central air conditioning systems: galvanized sheet metal, color steel insulation board; (Using fiberglass and composite materials)

3environmental control systemUse air ducts: galvanized sheet, stainless steel; (Plastic, fiberglass, composite materials can be used)

4. Industrialventilation systemUse air ducts: steel plates, galvanized plates; (Libo ventilation duct. Can be made of plastic, fiberglass, composite materials)

Note: Fiberglass ducts can be divided into two types: organic and inorganic. Organic materials are prohibited for those with fire protection requirements according to design specifications;

5. Special use occasion air ducts: mining coated cloth air ducts, mining plastic ventilation ducts; (Requirements for flame retardant and anti-static mining safety characteristics)
Processing requirements for pipelines:

Circular pipe diameter or rectangular pipe large side length	Pipe wall thickness	Allowable deviation of pipeline length	Allowable deviation of circular pipe diameter or rectangular pipe edge length	Flange size
	Pipe wall thickness	Allowable deviation of pipeline length		width	thickness
≤300	3+0.5	±10	±3	≥30	≥5
320~500	4±0.5		±3	≥40	≥6
530~1000	5±0.5		±4	≥50	≥8
1060~1500	6±0.5		±4	≥55	≥10
1600~1900	7±0.5		±5	≥60	≥15
≥2000	8±0.5		±5	≥60	≥20

There are three forms of D-type pipes: three air ducts, two air ducts, and single air ducts. D-type pipes are generally vertically buried in walls or corners, and their air outlet orientation is determined according to the design drawings. The specifications and dimensions of Class D pipes are shown in Table 2.

Table 1 Specification and dimensions of Class D pipes/mm

Size name	Basic dimensions	Allowable deviation
length	2700~3000	－14
width	250~450	±3
height	150~300	±2
Pipe wall thickness	9	+2 －1

Insulated ducts are commonly used in air conditioning projects, with a wall thickness of the insulation layer plus the structural thickness. The insulation layer is polystyrene foam board or polyurethane foam plastic board. Its thickness is 20-30mm.

Ventilation fittings such as reducers, tees, elbows, etc. shall be designed and manufactured according to the corresponding ventilation pipe design.
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