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Hot Dip Galvanizing Process
Material Inspection (Steel Pipe) --- Hanging --- De-greasing --- Rinsing --- Pickling --- Washing --- Dipping Fluxing --- Hot Air Drying --- Inside and Outside Hot-dipped Galvanizing Blow Carbon Steel Seamless Pipe
--- Cooling --- Passivation and Rising --- Unloading --- Inspection and Trimming --- Type Identification --- Packaging and Storing and Transportation
| Commodity | Galvanized Seamless Pipe |
|
OD |
21.3mm ~ 406.4mm |
|
thickness |
0.5mm ~ 20mm |
|
length |
0.3mtr ~ 18mtr |
|
material |
Q195—Grade B, SS330, SPC, S185Q215—Grade C,CS Type B, SS330, SPHCQ235---Grade D, SS400, S235JR, S235JO, S235J2Q345---SS500, ST52 |
|
Standard |
GB/T13793-1992,GB/T14291-2006, GB/T3091- 1993,GB/T3092-1993,GB3640-88BS1387/1985,ASTM A53/A36,EN39/EN10219,API 5L,GB/T9711.1-99 etc |
|
zinc coating |
pre galvanized steel pipe: 60-150g/m2hot dipped galvanized steel pipe:200-400g/m2 |
|
application |
Widely used in Structure, Accessorize,Construction,Fluid transportation,machinery parts,the stressparts of the automobiletractor parts and so on |
|
Package |
1) Big OD: in bulk2) Small OD: packed by steel strips3) Plastic bags4) According to customer’s requirement |
|
advantage |
1. reasonable price with excellent quality2, abundant stock and prompt delivery3, rich supply and export experience, sincere service |
| Element Material |
Chemical Composition% |
Mechanical Property |
||||||
|
C% |
Mn% |
S% |
P% |
Si% |
Yield Point (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
|
|
Q195 |
0.06-0.12 |
0.25-0.50 |
<0.050 |
<0.045 |
<0.30 |
>195 |
315-430 |
32-33 |
|
Q215 |
0.09-0.15 |
0.25-0.55 |
<0.05 |
<0.045 |
<0.30 |
>215 |
335-450 |
26-31 |
|
Q235 |
0.12-0.20 |
0.30-0.70 |
<0.045 |
<0.045 |
<0.30 |
>235 |
375-500 |
24-26 |
|
Q345 |
<0.20 |
1.0-1.6 |
<0.040 |
<0.040 |
<0.55 |
>345 |
470-630 |
21-22 |
Degreasing, pickling, cleaning, galvanizing, passivation
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