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Nominal
Pipe
Size
(mm) |
KCF Inner Surface Roughness Assurance Value |
| AP Grade |
BA/MP Grade |
EP Grade |
| Ry |
Ra |
Ry |
Ra |
Ry |
Ra |
| 1/8" |
25
μm |
2.5
μm |
100
μinch |
4.5
μm |
0.6
μm |
20
μinch |
1.0
μm |
0.2
μm |
7
μinch |
1/4"～2"
6A～40A |
3.0
μm |
0.5
μm |
20
μinch |
0.5
μm |
0.12
μm |
5
μinch |
2-1/2"～4"
50A～100A |
4.0
μm |
0.6
μm |
25
μinch |
5"～6"
125A～300A |
0.7
μm |
0.15
μm |
6
μinch |
| Measured range |
12.5mm |
4.0mm |
4.0mm |
| Cutoff |
2.5mm |
0.8mm |
0.8mm |
EP is an abbreviation for Electropolishing BA (MP) for Bright Annealing
(Mechanical Polishing), and AP for Acid.
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