Because DIN 30678 is obsolete, many design authorities now refer to (Petroleum and natural gas industries - External coatings for buried or submerged pipelines). While not the same document, ISO 21809-1 contains updated, harmonized requirements. Some national bodies offer "read-only" versions of ISO standards under specific licenses.
| Parameter | Requirement (DIN 30678) | |-----------|--------------------------| | Coating type | 3-layer PE (epoxy + adhesive + PE) | | Min thickness (DN 100–300) | 1.8 mm | | Min thickness (DN 350–800) | 2.2 mm | | Adhesion (peel test) | ≥ 100 N/cm at 23 °C | | Cathodic disbondment | ≤ 8 mm after 28 days | | Indentation hardness | ≤ 0.3 mm at 80 °C | din 30678 pdf
is the German standard governing the requirements and testing of factory-applied polypropylene (PP) coatings for steel pipes and fittings. Primarily used for pipes in contact with soil or water, it ensures high-level corrosion protection for pipelines operating at elevated temperatures. Core Standard Information Because DIN 30678 is obsolete, many design authorities
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