• 3LPE-3PE-three-layer-polyethylene-coating-for-steel-pipe-line

3LPE/3PE/HDPE/three layer polyethylene coating seamless carbon steel pipe is widely used in pipelines to convey water, oil and gas.These combined integrated coating plastic steel pipes have characteristics of strong bonding strength, good insulation performance, mechanical shock resistance, long service life and many other advantages. We can provide coating design service and produce seamless pipes with different coating colors and coating thicknesses according to your requirements.


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

3LPE/3PE/ three layer polyethylene coating for steel pipe line

Inquiry form