Round Stainless Steel Chimney Flue System

Technical Data

The Home Fires Double walled insulated stainless steel flue system is suitable for all applications in negative pressure. It is designed for use with all oil, pellet, wood, coal domestic and commercial appliances.

The Chimney System can be used for gas or wood stoves, fireplace stoves, furnaces, boilers, or other residential-type appliances and building heating appliance in which the maximum continuous flue-gas outlet temperatures do not exceed 600 deg. It may also be used for masonry fireplaces.

The Chimney Systems are not designed for forced draft, positive-pressure appliances.

Classification: T600-N1-D-Vm-L50050-G50 and T600-N1-D-Vm-L20050-G50

Working Temperature: ≤600℃

Working Pressure: Negative pressure up to 40Pa or natural draft.

Condensate Resistance class: Dry

Corrosion Resistance class: Vm (Manufacturer self declared as suitable for the application based on the product history and historical performance in the field)

Material for Double walled insulated stainless steel elements:

Inside: 0.5mm thick 304 stainless steel

Outside: 0.5mm thick 304 stainless steel

Insulation: Superwool Plus of 25mm thickness and 128kg/m³ Alkaline earth silicate. A light an flexible blanket, made of spinned ceramic fibers. This is a high density insulation, resisting up to 1260℃. This is considered a Non-Combustible product, with high resistance insulation. Low contraction and also low capacity for heat absorbsion and a total resistance to thermal changes. The superwool is eco and enviromental friendly. No adverse effects of this material on the environment are anticipated.

Material for the Single walled unpainted mirror finished stainless steel elements:

0.6mm thick 316L stainless steel

Material for the Single walled black wet painted finished stainless steel elements:

0.8mm thick 304 stainless steel. Forrest paint is used to paint the stainless steel black. The paint is temperature resistant up to 629℃. The double insulated elements are powdercoated with a Axalta product. All the elements has a continuous TIG welded seam.

Soot fire resistance: G50 (50mm minimum distance to combustible material for the double walled insulated elements only)

Available diameters:

Installations

• Always start the assembly by joining the first pipe with the appliance connector or spigot. It is important to insert the male end of the flue pipe into the spigot.
• Assemble double walled insulated pipes by:
  • Ensure that the parts are clean and not damaged at the edges.
  • You can apply lubrication paste to the male end of the inner pipe.
  • Bring the two pipes to be joint together and insert the male end into the female end of the two elements.
  • Push the two pipes together by hand.
  • Tap the top pipe to ensure correct seating of the joint, while ensuring that you do not damage the edge of the pipe that you are tapping. Light tapping only with a rubber mallet.
  • Fit and lock the locking band.
• The chimney should be installed with a minimum of horizontal runs and offsets. 45 degree bends as well as 90 degree bends can be used to create offsets. For a 45 degree offset, the distance between the two 45 degree bends should not exceed 20% of the total vertical height of the chimney.
• From the outside of a double walled insulated pipe, a 50mm minimum clearance must be maintained from combustible materials.
• From the outside of a single walled un-insulated pipe, a 300mm minimum clearance must be maintained from combustible materials.
• The chimney diameter should never be reduced to less than the diameter specified by the appliance manufacturer, in some cases this may involve an increase in diameter from the appliance spigot, utilizing a adaptor.
• Ensure chimney termination has adequate clearance from the roof of the building. Do not allow by-products of combustion to be discharged when they can enter an opening window or ventilation inlet.
• It is good practice to install a minimum vertical rise of 600mm on to an appliance before fitting a bend, to create an offset.
• The chimney should be adequately supported. A full range of support brackets are available. Lateral support brackets should be installed at 2m intervals.
• All exposed elements to rain and cold weather, should always be double walled insulated elements.
• Provision for inspection/sweeping must be made.
• Install a cowl to terminate the chimney stack. A cowl will also keep rain out of the system.
• The above notes are an outline of only some of the aspects of good chimney installations.

Chimney Maintenance

• Importance of maintenance

Appropriate operation and maintenance will keep your chimney clean and increase chimney life. Gas and oil burning appliance may need little maintenance, but wood burning appliance such as a wood stove which can create large deposits of creosote in the chimney need maintenance. Some wood stoves can create enough creosote in a very short time to cause a chimney fire.

• Creosote and Soot – The formation and why must be removed regularly

When wood is burning slowly, it produces a tar and other organic vapours, which combine with expelled moisture to form creosote. The creosote vapours condense in the relatively cool chimney flue of a slow-burning fire. As a result, creosote residue accumulates on the flue lining. When ignited this creosote makes an extremely hot fire.

The chimney should be inspected at least once during the heating season to determine if a creosote or soot build-up has occurred; if creosote or soot has accumulated (when a maximum of 6mm thickness of creosote or soot has accumulated), it should be removed to reduce the risk of chimney fire.

• Coal and anthracite

To reduce corrosion in the chimney where coal and anthracite is burned, the system must be thoroughly cleaned within 48 hours of shutting down the appliance for the season, and all soot should be removed from the chimney system.

• How to clean

Contact a professional certified chimney sweep for chimney cleaning services for advice, if you have any doubts about your ability to clean your chimney system; If you want to clean your chimney yourself, then; clean your chimney using a Plastic, wood or steel brush. Do not use a brush that will scratch the stainless steel liner of the chimney. The use of an oversize brush may damage the chimney.

Do not expect chemical chimney cleaners to keep your chimney clean. It cannot replace the mechanic cleaning. Use it only as last resort and make sure it is a product that is noncorrosive.

The tee cap can be removed by unlocking the locking band and then turning counterclockwise to clean from the bottom. Be sure to replace the tee cap and locking band when you are finished cleaning the chimney.

• Chimney fire

If a chimney fire occurs,

1. First close all dampers and/or air inlet openings to your appliance and fireplace opening with a non-combustible material,
2. Alert your family to the possible danger. If in doubt, call your Fire Department