3LPE Anti-corrosion Coated Steel Pipes
High quality spiral steel pipe, ERW steel pipe, seamless steel pipe coated material, anti-corrosion pipe Three Polyethylene(3LPE), two polyethylene (2PE) pipe coatings for oil and gas pipes.
1. Standard:
SY/T0413-2002, DIN30670, ISO 21809-1, CSA Z245.20 etc.
2. Process:
(1) Sanding blast SA2.5 and near white metal
(2) First layer FBE thickness as per standard
(3) Second layer Adhesive thickness as per standard
(4) Third layer Polyethylene (HDPE) thickness as per standard
(5) End Cutting Beveled 30degree, cut back 20mm from end
3. 2PE/3PE Coating Characteristics
|
NO. |
Item |
|
Property data |
|
Test way |
|
|
|
|
two laye |
three layer |
|
|
1 |
Detach strength(N/cm) |
20℃±5℃ |
≥70 |
≥100 |
SY/T0413-2002 |
|
|
|
50℃±5℃ |
≥35 |
≥70 |
|
|
2 |
Cleaning of the cathode(65℃,48h)(mm) |
|
|
≤8 |
SY/T0413-2002 |
|
3 |
Impact test(J/mm) |
|
≥8 |
|
SY/T0413-2002 |
|
4 |
Bending strength(2.5°-30℃±5℃) |
|
No crack of polythene |
|
SY/T0413-2002 |
4. 2PE/3PE Coating Thickness Requirements
|
N.B |
Epoxy powder coating |
Adhesive（um） |
Min wall thickness of anticorrosive coating（mm） |
||
|
(mm) |
(mm) |
two layer |
three layer |
usual grade |
strengthen grade |
|
≤100 |
≥80 |
|
|
1.8 |
2.5 |
|
250＜DN≤250 |
200-400 |
170-250 |
2 |
2.7 |
|
|
250＜DN≤500 |
|
|
2.2 |
2.9 |
|
|
500＜DN≤800 |
|
|
2.5 |
3.2 |
|
|
DN≥800 |
|
|
3 |
3.7 |
|
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