JIAXING H&G BOND TRADING CO.,LTD
JIAXING H&G BOND TRADING CO.,LTD
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Grade:NGHDG-20
Product:Excellent corrosion resistance Zn(0) Hot DIP Galvanized Conduit
Hot-dip galvanizing involves three main steps:
Preparation: The galvanizing reaction will only occur on a chemically clean surface, so the first step of the process involves removing contamination. First, the metal is degreased using a caustic solution and then dipped in hydrochloric acid to remove rust, mill scale, welding slag, paint and grease. This followed by a rinse and a dip in a flux solution, which is usually about 30 percent zinc ammonium chloride.
Galvanizing: When the clean iron or steel component is dipped into the molten zinc, zinc-iron alloy layers form as a result of a metallurgical reaction between the iron and zinc. When the material is pulled from the galvanizing bath, a layer of molten zinc is present on top of the alloy layer. When it cools, it has the bright, shiny appearance associated with galvanized products.
Inspection: After galvanizing, the coated materials are inspected for coating thickness and coating appearance. A variety of simple physical and laboratory tests may be performed to determine thickness, uniformity, adherence and appearance of the zinc coating.
Physical Properties
| Inner Diameter | External Diameter | Steel pipe thickness | Pipe Length | Remark | |
| mm | in | mm | mm | mm | |
| 15 | 1/2 | 21.3 | 2.8 | 6000 | |
| 20 | 3/4 | 26.9 | 2.8 | 6000 | |
| 25 | 1 | 33.7 | 3.2 | 6000 | |
| 32 | 11/4 | 42.4 | 3.5 | 6000 | |
| 40 | 11/2 | 48.3 | 3.5 | 6000 | |
| 50 | 2 | 60.3 | 3.8 | 6000 | |
| 65 | 21/2 | 76.1 | 4.0 | 6000 | |
| 80 | 3 | 88.9 | 4.0 | 6000 | |
| 100 | 4 | 114.3 | 4.0 | 6000 | |
| 125 | 5 | 139.7 | 4.0 | 6000 | |
| 150 | 6 | 165.1 | 4.5 | 6000 | |
Decriptions
“NEW GARDEN” Brand hot DIP galvanized conduit, Produced in strict accordance with the British standard BS4568 or GB/T4823.1, with its good quality, it is widely used in conduits for installations in telecommunications, electrical and other fields.
The inner and outer surfaces of the pipes are bright and uniform in color, and the welds are evenly formed into a linear shape. Each pipe is detected by eddy current. The hot-dip galvanizing used in the steel pipe is No. 0 zinc, which has strong corrosion resistance, and the inside and outside of the pipe have undergone special anti-corrosion treatment.
Application
It is widely used in conduits for installations in telecommunication, electrical and others fields.
Advantages
a. Lower cost than stainless steel
b. Lowest long-term cost
c. Reliable performance
d. Excellent resistance to mechanical damage
Steel Standard: BS4568 or GB/T4823.1
production process
Material Inspection(Steel Pipe) --- De-greasing --- Rinsing --- Pickling --- Washing --- Dipping Fluxing --- Hot Air Drying Inside and Outside Hot-dipped Galvanizing Blow --- Cooling --- Passivation and Rising --- Unloading --- Inspection and Trimming --- Type Identification Packaging and Storing and Transportation