• 3lpe coating and fiber reinforced plastics protection of steel crossing pipe

3lpe coating and fiber reinforced plastics protection are used for crossing pipes under complex working condition.The combination of these two kinds of coatings has significantly improved the acid resistance, alkali resistance and wear resistance of steel pipes.IMRI can customize various kinds of coatings of different applications and properties, such as 3lpe coating, 3lpp coating, fbe coating, liquid epoxy coating, epoxy coal tar coating, epoxy phenolic resin coating, polyurethane thermal insulation coating, etc.


Standard DIN30670
Processing ability OD:38mm-1620mm;WT:2mm-30mm
Length 6-14m
Packing PE/BE,Plastic cap,bundling
Technique External surface on Welded pipe or seamless pipe
Application Oil and Gas field,chemical engineering,energy engineering,water Transportation…
Service condition -40℃,+85℃;alkaline or sour;underground
Place of Origin China
MOQ 3 pices
Transportation 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port
→America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea,

2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”)
Khorgos port(Пограничный пункт “Хоргос”)→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)
Erlianhot port→Mongolia(Train and Truck)
Manchuria port→Russia(Train and Truck)

Type of DIN30670 3LPE/3PE coating
Type N S
Design temperatures for
sintered polyethylene
from −20 °C up to +50 °C from −40 °C up to +70 °C
Design temperatures for
extruded polyethylene
from −20 °C up to +60 °C from −40 °C up to +80 °C
Coating thickness of 3LPE
Nominal size DN normal (n) increased (v)
DN≤  100 1,8 2,5
100< DN≤  250 2,0 2,7
250 < DN< 500 2,2 2,9
500 ≤ DN <800 2,5 3,2
DN ≥800 3,0 3,7
DIN30670 3LPE/3PE Coating Performance
Property Requirement Testing as in Notes
Degree of cure of epoxy resin ΔTg according to the manufacturer’s specification Annex B
Cathodic disbondment (CD test) 23 °C/28 d or 60 °C/2 d max. 7 mm Annex C Applies only to three  layer coatings
Peel strengthb Type N:
100 N/cm (23 °C)
20 N/cm (50 °C)
Type S:
150 N/cm (23 °C)
30 N/cm (70 °C)
Annex D For system testing single values shall be no more than 25 % lower than the required average value.
Continuity (holiday detection) No discharges Annex E 25 kV test
Elongation at break (23 °C ± 2 °C) min. 400 % Annex F
Impact resistance (23 °C ± 2 °C) Type N: ≥ 5 J/mm
Type S: ≥ 7 J/mm
Annex H 25 kV test No discharges
Low temperature impact resistance Type N:
≥ 5 J/mm (−20 °C ± 2 °C)
Type S:
≥ 7 J/mm (−40 °C ± 2 °C)
Annex H 25 kV test No discharges
Indentation resistance Type N:
max. 0,2 mm (23 °C)
max. 0,3 mm (50 °C)
Type S:
max. 0,2 mm (23 °C)
max. 0,4 mm (70 °C)
Annex I
Specific electrical coating resistance (23 °C ± 2 °C) ≥ 108Ωm² Annex J
UV resistance ΔMFR ± 35 % Annex K
Thermal ageing resistance ΔMFR ± 35 % Annex L
                                                                                                 3PE coating production process

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