Technical requirements and scope of polyethylene protection
The DIN 30670 standard regulates the technical requirements for the application of three-layer extruded, as well as single-layer and multi-layer sintered polyethylene coatings designed for the anti-corrosion protection of steel pipes and fittings. Specialists at EV Group China emphasize that these coatings provide a high degree of insulation when operated in a temperature range from -40 °C to +80 °C.
The standard applies to seamless, electric-welded straight-seam, and spiral-seam pipes, as well as fittings used in pipeline systems for the transport of energy resources (oil, gas) and industrial media. The use of a PE coating (polyethylene sheath) guarantees reliable protection against mechanical damage, thermal exposure, and aggressive environments during installation, logistics, and long-term storage.
International harmonization of requirements for three-layer coatings for oil and gas pipelines is carried out in accordance with DIN EN ISO 21809-1.
It should be noted that the DIN 30670 standard is not applicable to the following cases:
- Insulation of steel pipes and fittings used in water supply and drainage systems (domestic drinking and wastewater purposes).
- Protective coatings for low-pressure distribution pipelines for gaseous and liquid media.
- Specific types of single-layer or multi-layer sintered coatings for highly specialized distribution networks.
For other tasks not specified in the exceptions, these requirements are considered basic. When designing systems with two-layer polyethylene coating, the provisions of the DIN EN 10288 standard must be followed.