Pipe Pipe Fittings Optional Note

Pipe pipe fittings optional note

Pipe pipe fittings optional note

1 pipe pipe fittings appearance. The color should be in line pipe, both inside and outside surface should be smooth, flat, no dents, bubbles and other surface defects that affect performance and should not contain visible impurities; pipe

fittings surface should be smooth, flat, not allowed to have cracks, bubbles, peeling and obvious impurities, serious shape and color of inequality reduction, decomposition of discoloration and other defects.

2, pipe pipe fittings of non-translucent. Pipe pipe fittings should be opaque.

3, pipe diameters and wall thickness pipe fittings. According to GB/T18742.2-2002 national standards, according to size of pipe into S5, S4, S3.2, S2.5, S2 five series. Tube S and the nominal pressure are similar

Should be correspondence between pipe size pipe series S, the nominal diameter dn * Nominal wall thickness en, said the main test the nominal pipe diameter, the average diameter and wall thickness and tube series corresponding, pipe fittings of

Socket size and the corresponding nominal diameter.

4, pipe pipe fittings of the physical and mechanical properties and chemical properties. Hydrostatic testing, melt flow rate, hydrostatic testing and thermal stability under the vertical tube retraction rate, simple beam impulse

Hit test whether the national standard, the test can check the material content of the report and re-testing report.

5, tube pipe fittings of the health properties of whether national standards. This can check the health inspection department of the health properties of pipe fittings pipe inspection reports.

6, system suitability. Pipe and pipe fittings connected to the internal pressure, through 8760 hours and 5000 thermal cycles, the two combined tests.

by: changjiang

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