SMOG mica
SMOG: S – mica, M – muscovite; O – edge-surfaced; G – hydrothermal
Edge-surfaced muscovite mica is designed for water columns of high-pressure boilers as hydrothermal insulation.
Basic parameters and dimensions:
- Edge-surfaced mica is represented by rectangular plates (the plates).
- The length of the plates shall not exceed 220 mm (according to GOST 13752-86
in fact, delivery of bigger plates is also possible), the width of the plates is not more than 36 mm. Nominal dimensions of the plates are set as agreed by a customer and a manufacturer. - Nominal width of the plates is ± 0,25 mm.
- Edge-surfaced mica shall be manufactured by SMOG grade.
Conventional value of the plates shall include a grade, nominal dimensions and designation of the current standard.
Example of conventional value: SMOG mica 220×35 GOST 13752-86
SMOG dimensions according to GOST 13752-86
| Length, mm | Width, mm | Thickness, mm |
| 160 | 22-40 | 0,15-0,40 |
| 220 | 22-40 | 0,15-0,40 |
| 250 | 22-40 | 0,15-0,40 |
| 280 | 22-40 | 0,15-0,40 |
| 300 | 22-40 | 0,15-0,40 |
| 320 | 22-40 | 0,15-0,40 |
| 340 | 22-40 | 0,15-0,40 |
| 360 | 22-40 | 0,15-0,40 |
SMOG dimensions according to DIN
| Type А | Type V/N | Type ТА28 | |||
| Length, mm | Width, mm | Length, mm | Width, mm | Length, mm | Width, mm |
| 95 | 30 | 95 | 34 | 133 | 47 1) |
| 115 | 30 | 115 | 34 | 183 | 47 2) |
| 140 | 30 | 140 | 34 | 208 | 47 2) |
| 165 | 30 | 165 | 34 | 238 | 47 2) |
| 190 | 30 | 190 | 34 | 268 | 47 2) |
| 220 | 30 | 220 | 34 | 298 | 47 2) |
| 250 | 30 | 250 | 34 | 338 | 47 2) |
| 280 | 30 | 280 | 34 | 358 | 47 2) |
| 320 | 30 | 320 | 34 | ||
| 340 | 30 | 340 | 34 | ||
| s=0,15-0,20 | s=0,15-0,20 | 1)s=0,60 2)s=0,30-0,40 | |||
Any dimensions are available to order
Note:
An observation part of the plate is considered a part 4 mm wide which is located symmetrically to the roll axis.
Finger marks on the surface are not considered as a contamination.
Edge-surfaced mica shall have smooth or slightly-undulating surface.
SMOG plates are packed with gaskets for leak tightness.
SMOE and SMOP mica
SMOE and SMOP mica is designed for thermoelectric insulation of the sensing element of resistant thermometers (SMOE), as well as for observation windows of industrial furnaces and household equipment (SMOP).
Edge-surfaced mica is represented by rectangular plates. It is designed for thermoelectric insulation of the sensing element of resistant thermometers, as well as for phlogopite mica and muscovite edge-surfaced mica, designed for observation windows of industrial furnaces and household equipment.
Edge-surfaced mica is manufactured by SMOE, SMOP and SFOP grades.
S – mica
M – muscovite
F – phlogopite
O – edge-surfaced
E – thermal elements
P – observation windows of industrial furnaces and household equipment.
The maximum dimensions and permitted deviations from the nominal dimensions of the plates shall not exceed the values indicated in the table.
| Mica grade | NPC code | Max length, mm, not above | Permitted deviation from nominal dimensions of the length and width, mm, not above | Nominal thickness | Permitted thickness deviation, mm, not above |
| SMOE | 57 2416 | 200 | -1 | 0,10,2 0,3 0,4 0,5 |
+0,05 -0,02 -0,05 -0,05 -0,05 -0,05 |
| SMOP, SFOP | 57 2417 | 70 | -1 | 0,06 | -0,04 |
Nominal dimensions of the all grades plates are determined as agreed by a manufacturer and a customer.
The plates must comply with the standards indicated in the table
| No. | Indicator name | SMOE normal range | SMOP, SFOP normal range |
| 1 | Plate-type mineral spots of ferrum oxide | Not permitted | Extend beyond |
| 2 | Space occupied by plate-type mineral spots of any color, except of ferrum oxide, %, not above | Extend beyond | 50 |
| 3 | Overriding of edge cracks (counting by perpendicular to the edge), mm, not above | 2 | 5 |
| 4 | Volume (piercing) mineral spots | Not permitted | Not permitted |
| 5 | Space occupied by separations, %, not above | 40 | Extend beyond |
| 6 | Puncture diameter, mm, not above | Not permitted | 1 |
| 7 | Thickness difference due to the partial removal, mm, not above | 0,01 | 0,02 |
| 8 | The length of angle tilt, mm, not above | 1 | 5 |
| 9 | Surface contamination | Not permitted | Extend beyond |
Finger marks on the surface are not considered as a contamination.
Edge-surfaced mica SMOE shall have smooth or slightly-undulating surface.
Mica plates SMOSHCH
SMOSHCH: S – mica; M – muscovite; O – edge-surfaced; SHCH – for brush holding plates.
Edge-surfaced mica is represented by squared shape plates. It is designed for electrical insulation of brush holding plates for high-voltage electrical machines.
The plate length shall be not above 100 mm, width – not above 50 mm. Nominal dimensions of plates are determined as agreed by a consumer and a manufacturer.
Nominal thickness of the plates is 0,04 mm
According to GOST 13753-86
This products are designed for electrical insulation of brush holding plates of high-voltage electrical machines.
| Indicator name | Normal range |
| Overriding of edge cracks, mm, not above | 2 |
| The length of angle tilt, mm, not above | 3 |
| Volume (piercing) mineral spots, punctures, surface contamination | Not permitted |
| Deviations from the nominal length and width, mm, not above | +/- 1 |
| Deviations from the nominal thickness, mm, not above | +/- 0,02 |
| Thickness difference due to the partial removal, mm, not above | 0,02 |
| Withstand voltage, V, with the plate thickness of, mm: from 0,02 to 0,03 inclusive
over 0,03 to 0,04 inclusive over 0,04 to 0,05 inclusive over 0,05 to 0,06 inclusive over 0,06 to 0,07 inclusive |
1500
2000 2500 3000 3250 |