Three-Layer Polyethylene steel Pipe Liquid coating blasting Line machinery
Application
The coating technology allows to obtain the anticorrosive three-layer polyethylene/polyetylene coating, which consist of:
Epoxy layer,
Copolymer layer (bonding agent),
Polyethylene/polypropylene layer.
The coating is applied on steel pipes of diameters from 159 mm to 1420 mm and length from 6 m to 18 m. Properties of applied coatings comply with the following stan- dards:
EN-PN ISO 21809,
DIN 30670,
DIN 30678,
NFA 49-710,
EN-PN 10285.
The anticorrosive coating consists of the following layers:
Epoxy layer of minimum thickness of 80 μ M,
Copolymer layer of minimum thickness of 250 μ M,
Polyethylene layer of minimum thickness between 1, 8 mm and
3, 7 mm or polypropylene layer of minimal thickness between 1, 8 mm and 2, 5 mm.
"FERRUM" S. A. Manufactures coated steel pipes in diameter from 159 mm to 1420 mm and length from 6 m to 18 m. We provide coating services with reference to pipes delivered by our custo- mers.
Coating gradeCoating typeCoating thickness depending on the pipe outer diameter [mm]
159 - 273323, 9 - 457508 - 559610 - 762813 - 1420
PolyethyleneN-n, S-n22, 22, 52, 53
N-v, S-v2, 72, 93, 23, 23, 7
Polypropylenestandard22, 22, 22, 52, 5
Note: For the diameters over 1420 mm "FERRUM" S. A. Can make coating by polyethylene tapes acc. To DIN 30672 class B30, C30 and C50.
N-n, N-v coating with low density polyethylene (LDPE) or medium density polyethylene (MDPE) with regular n and reinforced v thickness
S-n, S-v coating with high density polyethylene (HDPE) with regular n and reinforced v thickness
Anticorrosive coating 3LPE/ 3LPP according to PN-EN ISO 21809-1 is composed of:
Epoxy layer of minimum 125 μ M thickness,
Copolymer layer of minimum 150 μ M thickness,
Polyethylene or polypropylene layer from 1, 8 mm to 4, 7 mm.
Layer thickness
C kg/mKlasa A1Klasa A2Klasa A3Klasa B1Klasa B2Klasa B3Klasa C1Klasa C2Klasa C3
≤ 151, 82, 12, 61, 31, 82, 31, 31, 72, 1
15≤ C ≤ 502, 02, 43, 01, 52, 12, 71, 51, 92, 4
50≤ C ≤ 1302, 42, 83, 51, 82, 53, 11, 82, 32, 8
130≤ C ≤ 3002, 63, 23, 92, 22, 83, 52, 22, 53, 2
300 < C3, 23, 84, 72, 53, 34, 22, 53, 03, 8
The coating manufacturing process consists of the following operations:
The surface blast cleaning to Sa 2 1/2 acc. To ISO 8501-1,
The electrostatic spraying of epoxy powder onto a heated pipe,
Wrapping a pipe with extruded copolymer,
Wrapping a pipe with polyethylene/polyetylene in continuous way,
Cooling the coating and dressing the pipe ends.
An extruded polyethylene coating has higher mechanical properties in comparison with cold applied polyethylene tape coating. Anticor- rosive coatings made of three-layer PE/PP are characterized by:
High mechanical strength,
High adherence of the coating to the pipe,
Guaranteedlong-lastinganticorrosiveprotectionofundergroundpipelines for minimum 50 years,
100% protection of weld zone of coated longitudinally and spirally welded pipes,
Suitability for bending of coated steel without damaging the insulation layer.
Audited Supplier 
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