Honeycomb ceramic block quality control procedures
| MARKING | DEFINITION | TOLERANCES QUALITY | ||
| A | B | C | ||
| 100% OF PIECES CHECKED VISUALLY | ||||
| 1.0--VISUALS | ||||
| 1.1 Edge and Corner chips | Edge Chip: Corner Chip:  |
Max.1chip Length:<=10mm Width:<=10mm Depth:<=10mm |
Max.2chips Length:<=15mm Width:<=15mm Depth:<=15mm |
Max.3chip sLength<=30mm Width:<=30mm Depth:<=30mm |
| 1.2 Face and Side cracks | Rectangular to way to extrusion: Total length of cracks  |
Max.1crack X=Max.1mm L<=22%ofUL |
Max.2cracks
X=Max.1mm L<=33%ofUL |
Max.3cracks X=Max.6mm L<=66%ofU |
| Parallel to way of extrusion: Total length of cracks  Crack is defined with a width of>=0.2mm Crack is defined with a depth of>=10mm |
Max.1crack X=Max.1mm L<=25%ofUQ |
Max.2cracks
X=Max.1mm L<=50%ofUQ |
Max.3cracks X=Max.6mm |
|
| 1.3 Web and Cell defects | |||
| Sum of all web and cell defects which is max.allowed: | |||
| Honeycomb 25*25 | Max.3 | Max.5 | Max.10 |
| Honeycomb 40*40 | Max.5 | Max.10 | Max.15 |
| Honeycomb 50*50 | Max.5 | Max.10 | Max.15 |
| Missing walls are not allowed to be situated side by side; defect is defined with a depth of>=10mm      |
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| MARKING | DEFINITION | TOLERANCES QUALITY | TEST INSTRUMENT | ||
| A | B | C | |||
| 2.0–DIMENSIONALS | |||||
| 2.1 Entry(Sag) | Max.difference of a straight line drawing of the sides |
Max.1mm | Max.1.5mm | Max.5mm | Tentacle gauge Ruler |
| 2.2 Bend | Max.difference of a straight line drawing of the length |
Max.2mm | Max.3mm | Max.5mm | Tentacle gauge Plate |
| 2.3 Dimensions | Measurement of a honeycomb rectangular to way to extrusion | +2mm-0mm | +2mm-1mm | +6mm-3mm | Slide caliber |
| Measurement of a honeycomb parallel to way of extrusion | +2mm-1mm | +3mm-3mm | +6mm-6mm | Slide caliber | |
The Tolerance Quality of 400CPSI Honeycomb Ceramic
| Items | Tolerance | |
| Wall Thickness(mm) | ±0.05 | |
| Physical Dimension(mm) | <100 | 1.0 |
| >=100 | 1.5 | |
| Parallelism(mm) | <=1.5 | |
| Degree of Circularity(mm) | <100 | 1.5 |
| >=100 | 2.0 | |
| Vertical(mm) | Not more than 2% product height | |
| Cracks | Visible cracks not allowed | |
| Weband Cell Defects | Missing walls are not allowed to be situated side by side,the missing walls are not more than 0.1% the total walls | |
| Face and Side Defects | Defect is defined with a length of>2mm,the number of defects of 10*4*2mm are not allowed more than 3. | |
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