1. Product Overview

This product is formulated with special epoxy resin, dedicated curing agents, and food-grade pigments and fillers.

It features high reactivity, excellent adhesion, high cross-linking density, smooth surface leveling, and high gloss. The cured coating film provides outstanding resistance to chemicals, solvents, cathodic disbondment, as well as excellent flexibility and impact resistance.

The product complies with the Safety Evaluation Standards for Protective Materials Used in Drinking Water Applications.

2. Main Technical Specifications

Curing Conditions

Curing Temperature	Curing Time
200℃	3 min

Powder Properties

Test Item	Test Method	Technical Specification
Density (g/cm³)	GB/T 4472	1.30-1.50
Non-volatile Content (%)	GB/T 6554	≥ 99.4
Particle Size and Distribution (%)	GB/T 6554	150 μm ≤ 3.0
Particle Size and Distribution (%)	GB/T 6554	250 μm ≤ 0.2
Gel Time (s)	GB/T 16995	≤ 180 (180℃) ≤ 120 (200℃) ≤ 60 (230℃)
Thermal Property ΔH (J/g)	SY/T 0442	≥ 45
Thermal Property Tg (℃)	SY/T 0442	≥ 95
Magnetic Material Content (%)	JB/T 6570	≤ 0.002

Coating Performance

Test Item	Test Method	Technical Specification
Appearance	Visual Inspection	Smooth surface, uniform color, no bubbles or cracks; slight orange peel texture is acceptable
Thermal Property ΔTg (℃)	SY/T 0442	≤ 5
Cathodic Disbondment (65℃, 48h) (mm)	SY/T 0442	≤ 6.5
Adhesive Interface Porosity (Grade)	SY/T 0442	1-4
Cross-sectional Porosity (Grade)	SY/T 0442	1-3
Bending Resistance (3°)	SY/T 0442	No cracks in coating
Impact Strength (J)	SY/T 0442	≥ 8. no pinholes
Abrasion Resistance (1000g, 1000 cycles) (mg)	GB/T 1768	≤ 20
Adhesion Strength (Peeling Method) (Grade)	SY/T 0442	1~2
Adhesion Strength (Pull-off Method) (MPa)	GB/T 5210	≥ 20
Volume Resistivity (Ω·m)	GB/T 1410	≥ 1×10¹³
Dielectric Strength (MV/m)	GB/T 1408.1	≥ 30
Salt Spray Resistance (1000h)	GB/T 1771	No change in coating
Flattening Test (Flattening Ratio 4/5)	CJ/T 120	No cracks at weld seams
Water Quality Immersion Test	GB/T 17219	Qualified
High Temperature and High Pressure Resistance Test	SY/T 0442	To be agreed upon

Surface Pretreatment Requirements

The steel pipe surface shall be free from oil contamination and moisture.

Surface preparation quality shall reach Sa2½ grade (GB/T 8923).

Anchor profile depth is recommended to be 50-90 μm.

Dust and abrasive residues attached to the steel pipe surface shall be completely removed by air blowing.

Preheating temperature shall be controlled between 180-210℃ and shall not exceed 230℃.

Application Methods

This series of products is suitable for the following coating methods:

Electrostatic spraying

Dip coating

Roller coating

Other applicable coating methods

3. Application Range

Internal coating of municipal drinking water pipelines.

Pipe fittings and components, including:

Flanged pipe fittings

Elbows

Valves

Pumps

Internal and external surfaces of drinking water storage tanks.

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.