TS-HDEM Lines-Heavy Duty Expanded Hot-Dip Galvanized Steel Metal Mesh
Definition of Expanded Metal Mesh
Expanded metal mesh is a type of sheet metal mesh which has been cut and stretched to form a regular pattern (often diamond-shaped) of metal mesh-like material. It is commonly used for fences and grates.
Expanded metal mesh is stronger than an equivalent weight of wire mesh such as chicken wire.
Freshly-cut expanded metal has a large number of exposed sharp edges, requiring caution and protective clothing, such as leather gloves and aprons to prevent skin abrasions and cuts.
Applications of Expanded Metal Mesh
Expanded metal mesh is frequently used to make fences, walkways, and grates, as the material is very durable and strong, unlike lighter and less expensive wire mesh. Many small openings in the material allow flow through of air, water, and light, while still providing a mechanical barrier to larger objects.
Another advantage to using expanded metal mesh as opposed to plain sheet metal is that the exposed edges of the expanded metal mesh provide more traction, which has led to its use in catwalks or drainage covers.
Large quantities of expanded metal mesh are used by the construction industry as metal lath to support materials such as plaster, stucco, or adobe in walls and other structures.
In contemporary architecture, expanded metal mesh has been used as an exposed facade or screen material which can be formed into simple or complex decorative shapes.
Expanded metal mesh can also be used for a walkway grating that is self-draining and non-slip.
About Heavy Duty Expanded Hot-Dip Galvanized Steel Metal Mesh
A heavy duty expanded hot-dip galvanized steel metal mesh is produced from a heavy-gauge hot-dip galvanized steel sheet in case of 3mm or less thick sheets. When the steel sheet thickness is required to be more than 3mm, the carbon steel plates should be used to produce expanded metal sheets first, and then the resultant expanded metal sheets will be hot-dip galvanized upon request. In the production process, the heavy-gauge hot-dip galvanized steel sheet or carbon steel plate is simultaneously die-cut and expanded as it moves through the progressive dies on a press. This production process allows the heavy-gauge steel plate to be expanded lengthwise significantly, while reducing much of its original weight per square meter and retaining its sturdiness as a single piece of steel.
The heavy duty expanded hot-dip galvanized steel metal mesh contains no joints or welds. It is easy to install and maintain.
The heavy duty expanded hot-dip galvanized steel metal mesh creates a stable, slip-resistant surface on stairs, platforms, catwalks and pedestrian walkways.
In sum, the heavy duty expanded hot-dip galvanized steel metal mesh is strong, so it can hold up very well even in the most demanding work environments.
The heavy duty expanded hot-dip galvanized steel metal mesh also features a high percentage of open area that allows snow, grease, dirt and other debris to fall through.
In addition to the heavy duty expanded hot-dip galvanized steel metal mesh sheets, our factory also produces the heavy duty expanded metal sheets of some other material types, including mild steel, stainless steel and aluminum.
What is Hot-Dip Galvanizing?
Hot-dip galvanizing (HDG) is the process of coating fabricated steel (a mild steel sheet or plate, and many more) by immersing it in a bath of molten zinc. There are three fundamental steps in the hot-dip galvanizing process; surface preparation, galvanizing, and inspection.
--Surface Preparation
When the fabricated steel arrives at the galvanizing facility, it is hung by wire or placed in a racking system which can be lifted and moved through the process by overhead cranes. The steel then goes through a series of three cleaning steps; degreasing, pickling, and fluxing. Degreasing removes dirt, oil, and organic residues, while the acidic pickling bath will remove mill scale and iron oxide. The final surface preparation step, fluxing, will remove any remaining oxides and coat the steel with a protective layer to prevent any further oxide formation prior to galvanizing. Proper surface preparation is critical, as zinc will not react with unclean steel.
--Galvanizing
After surface preparation, the steel is dipped in the molten (830 F) bath of at least 98% zinc. The steel is lowered into the kettle at an angle that allows air to escape from tubular shapes or other pockets, and the zinc to flow into, over, and through the entire piece. While immersed in the kettle, the iron in the steel metallurgically reacts with the zinc to form a series of zinc-iron intermetallic layers and an outer layer of pure zinc.
--Inspection
The final step is an inspection of the coating. A very accurate determination of the quality of the coating can be achieved by a visual inspection, as zinc does not react with unclean steel, which would leave an uncoated area on the part. Additionally, a magnetic thickness gauge can be used to verify the coating thickness to see whether the coating thickness complies with specification requirements.
--Zinc Coating Benefits
Hot-dip galvanizing provides a number of benefits to the steel it protects. The metallurgically-bonded zinc-iron alloy layers not only create a barrier between the steel and the environment, but also cathodically protect the steel. The cathodic protection offered by zinc means the galvanized coating sacrifices itself to protect the underlying base steel from corrosion.
The tightly adhered coating, which has bond strength of around 3,600 psi, is also extremely abrasion-resistant, as the intermetallic layers are harder than the base steel. However, even if the coating is damaged, zincs sacrificial action will protect exposed steel up to ¼ inch away.
In addition to the cathodic protection offered by hot-dip galvanizing, there are a few other characteristics of the coating which provide longevity. First, reaction in the galvanizing kettle is a diffusion process, which means the coating grows perpendicular to the surface, ensuring all corners and edges have at least equal thickness to flat surfaces. Furthermore, the complete immersion in the zinc bath provides total coverage of the steel, including the interior of hollow structures.
Finally, the zinc coating naturally develops an impervious layer of corrosion products on the surface, know as the zinc patina. The patina, cathodic protection, complete coverage and all of these other features, provide hot-dip galvanized steel with a long, maintenance-free service life.
Technical Specifications of Heavy Duty Expanded Mild Steel Metal Mesh from Tec-Sieve
Model
No. |
Thickness of
Steel Sheets (mm) |
Nominal Size of Diamond Opening (mm) |
Theoretical Weight
(kgs/m2) |
SWD
(mm) |
LWD
(mm) |
Strand
(Strand Width, mm) |
| TS-HDEM221025 |
2 |
10 |
25 |
2 |
4.10 |
| TS-HDEM2.52.51530 |
2.5 |
15 |
30 |
2.5 |
7.06 |
| TS-HDEM332040 |
3 |
20 |
40 |
3 |
7.40 |
| TS-HDEM332550 |
3 |
25 |
50 |
3 |
5.93 |
| TS-HDEM332460 |
3 |
24 |
60 |
3 |
6.18 |
| TS-HDEM333060 |
3 |
30 |
60 |
3 |
4.95 |
| TS-HDEM462040 |
4 |
20 |
40 |
6 |
18.48 |
| TS-HDEM442460 |
4 |
24 |
60 |
4 |
10.90 |
| TS-HDEM443060 |
4 |
30 |
60 |
4 |
8.70 |
| TS-HDEM443280 |
4 |
32 |
80 |
4 |
8.16 |
| TS-HDEM444080 |
4 |
40 |
80 |
4 |
6.53 |
| TS-HDEM4438100 |
4 |
38 |
100 |
4 |
6.87 |
| TS-HDEM4450100 |
4 |
50 |
100 |
4 |
6.54 |
| TS-HDEM4.552460 |
4.5 |
24 |
60 |
5 |
16.06 |
| TS-HDEM4.563080 |
4.5 |
30 |
80 |
6 |
14.13 |
| TS-HDEM4.5636100 |
4.5 |
36 |
100 |
6 |
11.15 |
| TS-HDEM552460 |
5 |
24 |
60 |
5 |
16.20 |
| TS-HDEM553060 |
5 |
30 |
60 |
5 |
12.93 |
| TS-HDEM553280 |
5 |
32 |
80 |
5 |
12.15 |
| TS-HDEM554080 |
5 |
40 |
80 |
5 |
9.71 |
| TS-HDEM5538100 |
5 |
38 |
100 |
5 |
10.22 |
| TS-HDEM5550100 |
5 |
50 |
100 |
5 |
7.78 |
| TS-HDEM662040 |
6 |
20 |
40 |
6 |
27.55 |
| TS-HDEM6650100 |
6 |
50 |
100 |
6 |
11.23 |
| TS-HDEM6638100 |
6 |
38 |
100 |
6 |
14.78 |
| TS-HDEM7840100 |
7 |
40 |
100 |
8 |
21.98 |
| TS-HDEM7858150 |
7 |
58 |
150 |
8 |
15.16 |
| TS-HDEM7978200 |
7 |
78 |
200 |
9 |
12.68 |
| TS-HDEM8940100 |
8 |
40 |
100 |
9 |
28.26 |
| TS-HDEM8958150 |
8 |
58 |
150 |
9 |
19.48 |
Important Note:
Any other specifications of heavy duty expanded mild steel metal mesh sheets with reasonable technical parameters, including LWM and SWM, are also available upon request.
About the Overall Size of Heavy Duty Expanded Hot-Dip Galvanized Steel Metal Mesh Sheets
LWM (Width): Less than 4000mm
SWM (Length): Customizable
Applications of Heavy Duty Expanded Hot-Dip Galvanized Steel Metal Mesh
The Heavy duty expanded hot-dip galvanized steel metal mesh contains no joints or welds, as each sheet is a single piece of sturdy steel. Light weight and economical, the heavy duty expanded hot-dip galvanized steel metal mesh is ideal for use wherever a strong, durable lightweight surface is needed. It is the standard product specified by engineers and managers for use in:
-Catwalks, ramps, stairs, platforms
-Maintenance platforms
-Elevated walkways
-Infill panels
-Mezzanines and heavy duty shelving
-Truck-cab safety screens, vehicle flooring and transport protection
-Cold storage
-Ship and offshore rig flooring
-Partitions where high security is important
-Security platforms
-Industrial stairs, window protection and doors
Generally speaking, hot-dip galvanized steel expanded metal mesh works well wherever a durable, cost-effective, non-slip surface is required.
The high percentage of open area, characteristic of heavy duty expanded hot-dip galvanized steel metal mesh, allows snow, water and oil to drain off easily, thus maintaining the excellent slip-resistant surface. The same high percentage of open area also allows excellent passage of heat and light and contributes to walkway cleanliness. Where building maintenance and safety are important considerations, these features are outstanding.
An Informal Discussion about Expanded Metal
Strand Thickness:
In standard (raised) expanded metal, it is the gauge of the base metal (thickness of steel sheets).
In flattened expanded metal, it is the overall thickness of the finished sheet.
Strand Width:
Amount of material fed into the press to produce one strand.
SWD:
The distance from a point on a bond to a corresponding point on the following bond measured across the Short Way of Design or Short Way of Diamond.
LWD:
The distance from a point on a bond to a corresponding point on the following bond measured across the Long Way of Design or Long Way of Diamond.
Audited Supplier 
){kind=link}
){kind=link}