|
nominaldiameter of steel pipe DN
|
epoxy coating
|
adhesive layer (mm)
|
min thickness of anti-corrosion layer (mm)
|
||||
|
(mm)
|
(Um)
|
two layer
|
three layer
|
genaral type
|
advanced type
|
||
|
≤100
|
|
|
|
1.8
|
2.5
|
||
|
100<.≤250
|
|
|
|
2
|
2.7
|
||
|
250≤.<500
|
≥80
|
|
170-250
|
2.2
|
2.9
|
||
|
500≤.800
|
|
|
|
2.5
|
3.5
|
||
|
≥800
|
|
|
|
3
|
|
|
|
