Powder Coating for External Protection of Gas Pipelines
We are a manufacturer based in China. We specialize in providing high-quality Powder Coating for External Protection of Gas Pipelines for industrial clients across various sectors. Whether you need chemicals consultation or technical support, our team is here to help.
Category：Application industries Own Brand：MT /MOQ:100KG /From China/ B2B only.
Introduction
Product Characteristics
· Single-layer, double-layer, or triple-layer protection structures can be designed according to different requirements;
· Products suitable for medium-frequency production lines and heating furnace production lines can be designed;
· Excellent adhesion;
· Excellent balance between gelation rate and flow rate, with suitable melt viscosity, preventing sagging phenomenon;
· Dense coating structure with low porosity, reducing the risk of pinhole formation;
· Excellent resistance to penetration;
· Excellent UV resistance;
· Excellent bending resistance;
· Significantly reduces corrosion risks and subsequent maintenance costs;
· Complies with GB/T 37594 Technical Specification for External Three-Layer Fusion Bonded Powder Anti-Corrosion Coating with UV Resistance for Steel Pipelines;
· Complies with GB/T 42541 Coated Steel Pipes for Gas Pipelines.
Powder Performance Specifications
|
Item |
Test Method |
Performance Specification (Epoxy Powder) |
Performance Specification (Polyester Powder) |
| Curing Time (min) 200℃ | GB/T 23257 | ≤3; customized according to requirements | ≤3; customized according to requirements |
| Gel Time (s) 200℃ | GB/T 6554 | 12-30; customized according to requirements | 12-20; customized according to requirements |
| Density (g/cm³) | GB/T 6554 | 1.3~1.5 | 1.3~1.5 |
| Particle Size Distribution (%) 150μm | GB/T 6554 | ≤3 | ≤3 |
| Particle Size Distribution (%) 250μm | GB/T 6554 | ≤0.2 | ≤0.2 |
| Average Particle Size (μm) D50 | GB/T 21782.13 | 40~50 | 40~50 |
| Magnetic Material Content (%) | JB/T 6570 | ≤0.002 | ≤0.002 |
| Non-volatile Content (%) | GB/T 6554 | ≥99.4 | ≥99.4 |
Performance Specifications of Protective Coating
|
Item |
Test Method |
Performance Specification |
| Cathodic Disbondment (mm) 65℃, -1.5V, 48h | SY/T 0315 | ≤5 |
| Bending Resistance DN≤32. 23℃, 4 Times Outer Diameter, 15° | GB/T 37594 | No cracks, no leakage points |
| Bending Resistance DN＞150. -30℃, 2.5° | SY/T 0315 | No cracks |
| Flattening Test 32＜DN≤150. 23℃, 4/5 Outer Diameter | GB/T 37594 | No cracks, no leakage points |
| Impact Resistance DN＞32. 23℃, 3J | SY/T 0315 | No leakage points |
| Impact Resistance DN≤32. 23℃, 1.5J | SY/T 0315 | No leakage points |
| Porosity (Grade) Cross Section | SY/T 0315 | 1~4 |
| Porosity (Grade) Bonding Surface | SY/T 0315 | 1~4 |
| Adhesion (Grade) 75℃, 24h | GB/T 39636 | 1 |
| Adhesion (Grade) 75℃, 28d | GB/T 39636 | 1~3 |
| Salt Spray Test 1000h | GB/T 1771 | No blistering, no rusting, no cracking, no peeling |
| Accelerated Weathering Test 1200h | GB/T 1865 | Color change ≤ Grade 2. gloss loss ≤ Grade 2. no chalking, blistering, cracking, or peeling |
| Pencil Hardness | GB/T 6739 | ≥H |
| Thermal Property IATgl (°C) | SY/T 0315 | ≤5 |
| Thermal Property Curing Percentage (%) | SY/T 0315 | ≥95 |
| Chemical Corrosion Resistance | SY/T 0315 | No change |
| Holiday Detection 5V/μm | SY/T 0063 | No leakage points |
Application Areas
Suitable for external anti-corrosion protection of outdoor gas pipelines and exposed steel structures.
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