1. Product Description

This powder coating is a thermosetting pure epoxy powder coating specially designed for the three-layer polyethylene (3PE) pipeline anti-corrosion system.

It can be combined with an intermediate adhesive layer and an outer high-density polyethylene (HDPE) layer to form an excellent anti-corrosion protection system.

The epoxy powder primer layer provides excellent adhesion and resistance to cathodic disbondment. The outer polyethylene layer offers outstanding mechanical properties, water resistance, and weather resistance. The intermediate adhesive layer organically bonds the epoxy powder coating layer with the polyethylene layer.

The complete anti-corrosion system combines the advantages of both epoxy coating and polyethylene coating layers, making it one of the most widely used and effective pipeline anti-corrosion technologies.

2. Main Technical Specifications

Curing Conditions

Curing Temperature	Curing Time
180℃	5 min
200℃	3 min

Powder Properties

Test Item	Test Method	Technical Specification
Density (g/cm³)	GB/T 4472	1.30-1.50
Volatile Content (%)	GB/T 6554	≤ 0.6
Particle Size and Distribution (%)	GB/T 6554	150 μm ≤ 3.0 250 μm ≤ 0.2
Thermal Property ΔH (J/g)	SY/T 23257	≥ 45
Thermal Property Tg₂ (℃)	SY/T 23257	≥ 95
Gel Time (s)	GB/T 6554	≥ 25 (180℃) ≥ 12 (200℃)

Coating Performance

Test Item	Test Method	Technical Specification
Adhesion Strength (Grade)	SY/T 23257	≤ 2
Cathodic Disbondment at 65℃, 48h (mm)	SY/T 23257	≤ 6.5
Cathodic Disbondment at 65℃, 30d (mm)	SY/T 23257	≤ 15
Bending Resistance (-20 ± 3℃) (2.5°)	SY/T 23257	No cracks in coating

3. Application Range

Coating protection for long-distance refined oil pipelines and natural gas pipelines.

Coating protection for municipal gas pipelines and natural gas transmission pipelines.

4. Safety and Hygiene

This product is non-toxic, environmentally friendly, and non-flammable. However, appropriate protective measures should be taken to prevent excessive inhalation during construction and application.

5. Packaging, Storage and Transportation

The product is packed in cardboard cartons with polyethylene inner bags.

Net weight: 25 kg per package.

Store in a dry, ventilated, and clean environment below 30℃ for up to 12 months. Keep away from fire sources and heating equipment.

After opening, any unused powder must be resealed properly to prevent moisture absorption from the air.

Protect from direct sunlight and rain. When the ambient temperature exceeds 35℃, appropriate insulation measures should be taken during storage and transportation.