Hebei Shengtian Pipe Fittings Group Co., Ltd.
Hebei Shengtian Pipe Fittings Group Co.,Ltd. Base on China,Service the world
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API 5L 3PE Coated Anti Corrosion Spiral Welded SSAW Steel Pipe
Generally speaking, the welded steel pipes are divided into general welded pipe, galvanized welded pipe, oxygen welding tube, metric system welded tube, transformer tube, welding thin wall pipe and spiral welded pipe etc.
Specification of Thickness of Anti-corrosive Coating Layer
| DN of steel pipe (mm) | Epoxy powder (μm) | Adhesive Layer (μm) | Minimum thickness of the coating(mm) | |
| Common Level(G) | Strengthen Level(S) | |||
| DN≤100 | ≥120 | ≥170 | 1.8 | 2.5 |
| 100<DN≤250 | 2.0 | 2.7 | ||
| 250<DN<500 | 2.2 | 2.9 | ||
| 500≤DN<800 | 2.5 | 3.2 | ||
| DN≥800 | 3.0 | 3.7 | ||
Properties of the Epoxy Powder
| NO. | Item | Indexes |
| 1 | Size distribution(%) | 150μm oversize powder≤3.0 250μm oversize powder≤0.2 |
| 2 | Volatiles(%) | ≤0.6 |
| 3 | Density(g/m3) | 1.3-1.5 |
| 4 | Gel time(230ºC)/(S) | 15-30 |
| 5 | Fixed time(230ºC)/(min) | ≤3 |
