DIN 30670 specifies requirements for factory-applied three-layer extruded polyethylene-based coatings, and polyethylene-based coatings for the corrosion protection of steel pipes and fittings. These one or multi-layered sintered PE coating provides sufficient protection against the mechanical, thermal and chemical loads occurring during operation, transport, storage and installation.
The coatings of DIN 30670 are applied to longitudinally or DSAW pipes or seamless steel pipes and fittings used for the construction of pipelines for conveying liquids or gases. The coatings are suitable for the protection of buried or submerged steel pipes at design temperatures of -40 °C up to +80 °C.
Specification:
DIN 30670 seamless steel pipe with Polyethylene coatings
DIN 30670 DSAW steel pipe with Polyethylene coatings
DIN 30670 welded steel pipe with Polyethylene coatings
Size: 10.3-1020mm * 2mm-40mm（1/4”- 40”）
WT: 1.24mm - 60mm (SCH10-SCH160)
Length: 5.8M; 6M; 11.8 M, 12M or as customer's requirement
Material
API 5L Gr. B X42 X46 X52 X56 X60.
ASTM A106/53 Gr. A /Gr. B / Gr. C
APL 5CT:J55, K55, N80, L80, C90, T95, P110
DIN 1629: St 37.0, St 44.0, St 52.0
DIN 17175: St35.8, St45.8, 17Mn4, 17Mn5, 15Mn5, 15Mo3, 13CrMo910
EN10240: S235JO, S235JR, S355JR, P265TR1, S355JRH...
|
Nominal size of pipe |
Minimum thickness of normal coating(n), in mm |
Minimum thickness of Reinforced coating(v), in mm |
|
≤DN100 |
1.8 |
2.5 |
|
DN 100 - DN250 |
2.0 |
2.7 |
|
DN 250 - DN500 |
2.2 |
2.9 |
|
DN500 - DN800 |
2.5 |
3.2 |
|
≥DN800 |
3.0 |
3.7 |
Anti-corrosion coating:
|
Coating Type |
Coating Layer |
Coating thickness |
|
Three layers polyethylene |
Inside layer: epoxy (Green) |
2.0 -4.5mm |
|
Mid layer: adhesive (White) |
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|
Outside layer:polyethylene (Black) |
||
|
Two layers polyethylene |
Inside layer: adhesive |
2.0 -4.5mm |
|
Outside layer: polythene |
||
|
Epoxy |
Epoxy |
200-400um |
|
Two layers epoxy |
Inside layer: epoxy (Green) |
400-800um |
|
Outside layer:intensity epoxy (sage green) |
||
|
Three layers polyethylene |
Inside layer: epoxy (Green) |
2.5 -3mm |
|
Mid layer: adhesive (White) |
||
|
Outside layer: polypropylene (White) |
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