Outside the double-decked nodulizing epoxy powder the coating (carries out the Q/CNPC38-2002 standard) the double-decked nodulizing epoxy powder coating anticorrosion steel pipe to be suitable for medium and so on transportation petroleum, natural gas, water, the operating temperature - 30°c-100°c, this coating has the painting operation simple, not to have the pollution, the coating anti-impact and the bending property is good, the heat resistance higher characteristic, in domestic and foreign obtains the widespread application. Table 1 outside double-decked epoxy powder coating structure and type
numberCoating rankAnticorrosion level smallest thickness(μm)First floorSurface layer1Popular type2503702Strengthens300500
Note: If the owner has the special request to the coating thickness, then may rest on the powder factory recommendation thickness request, but first floor and surface layer thickness proportion suitable control between 1:2-1:1.5.
Table 2 double-decked nodulizing epoxy powder coating quality requirement
Test subjectQualitative index 1Testing methodThermal characteristicsConforms to the powder plant to assign the characteristicSY/T0315—97 Appendix B24 or 28h negative pole peeling≤6mmSY/T0315—97 Appendix C28dNegative pole peeling≤8mmSY/T0315—97 Appendix CFirst floor cross section factor of porosity1~4SY/T0315—97 Appendix EThe first floor sticks the surface factor of porosity1~4SY/T0315—97 Appendix E24h or 28h adhesion1~2SY/T0315—97 Appendix H0°c or -30°c,Anti-curving 20(According to project request designation experiment temperature )Does not have the crackAppendix DAnti-10J impactDoes not have the pinholeAppendix E30kg Bears scratches the natureScratches the depth ≤350μm,Does not have the leaking pointAppendix F
This coating has the painting operation simple,no pollution, the coating anti-impact and the bending property is good.
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