SVEZA PLYWOOD GRADES SUMMARY

Transcription

1 SVEZA PLYWOOD GRADES SUMMARY For full descriptions, see SVEZA Plywood Grades And Defects Reference. Ask your supplier. Code of restrictions on processing defects in plywood under STO requirements

2 CONTENTS Grade B. SVEZA plywood sheet sample (p. 3) Grade BB. SVEZA plywood sheet sample (p. 5) Grade CP. SVEZA plywood sheet sample (p. 7) Grade C. SVEZA plywood sheet sample (p. 10) SVEZA plywood grades description according to STO (p. 15) 2

3 GRADE B SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade B plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 3

4 GRADE B SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade B plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 4

5 GRADE BB SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade BB plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 5

6 GRADE BB SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade BB plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 6

7 GRADE CP SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade CP plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 7

8 GRADE CP SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade CP plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 8

9 GRADE CP SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade CP plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 9

10 GRADE C SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade C plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 10

11 GRADE C SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade C plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 11

12 GRADE C SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade C plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 12

13 GRADE C SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade C plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 13

14 GRADE C SVEZA PLYWOOD SHEET SAMPLE 1525 mm 1750 mm The picture shows a sample image of SVEZA grade C plywood. See the detailed grade description with a full list of allowable and non-allowable defects further in the catalog. 14

15 SVEZA PLYWOOD GRADES DESCRIPTION ACCORDING TO STO FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 1. Pin knots 2. Knots: sound, intergrown, light and dark 3. Partially intergrown knots 4. Black knots, loose knots, knot holes (no bark inclusions) 5. Close shakes 6 mm in diameter, 2 pc/m mm long, 2 pc/m of the sheet's width 15 mm in diameter, with a shake 0.5 mm wide, 5 pc/m 2 15 mm, with a shake 0.5 mm wide, 5 pc/m 2 with size and amount according to Item 4 hereby within the total amount of intergrown knots 6 mm in diameter, 3 pc/m mm long, 5 pc/m of the sheet's width 25 mm in diameter, with a shake 1 mm 10 pc/m 2 within the total amount of intergrown knots 15 mm in diameter, 10 pc/m 2 40 mm in diameter, no amount restriction 300 mm long, 5 pc/m of sheet width with a shake 1 mm wide 6 mm in diameter, no amount restriction 15 mm in diameter, 7 pc/m 2 marginal and medial 40 mm in diameter, no amount restriction (bark patches 5 mm wide around the knot are allowed) 70 mm in diameter, no amount restriction 70 mm in diameter, no amount restriction (bark patches 5 mm wide around the knot are allowed) 15

16 FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 6. Open shakes, open splits in spliced veneer 200 mm long, 1 mm wide, 2 pc/m of the sheet's width 200 mm long, 1 mm wide, 2 pc/m of the sheet's width 200 mm long, 2 mm wide, 3 pc/m of the sheet's width 250 mm long, 2 mm wide, 3 pc/m of the sheet's width 600 mm long, 2 mm wide, 2 pc/m of the sheet's width + allowed 600 mm long, 5 mm wide if sealed with putty 600 mm long, 2 mm wide, 2 pc/m of the sheet's width + allowed 600 mm long, 5 mm wide if sealed with putty 600 mm long, 5 mm wide, 2 pc/m of the sheet's width 800 mm long, 10 mm wide, no amount restriction 15 mm wide, no amount restriction 7. Timber structure flaws (diagonal grain, swirly grain, burls, bud traces), except for dark bud traces 8. Flaws in wood (inner inbark, light and dark) 9. Flaws in wood (open inbarks) Light inbark only is allowed, the dark one is allowed under size and amount requirements for black knots Light inbark is allowed, the dark one is allowed under size requirements for intergrown knots, within the total amount under the black knot requirements 16

17 FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 10. Sound discoloration (false heartwood) 25% of the sheet surface 75% of the sheet surface 11. Sound discoloration (streaks, streak traces) 100 mm long, 2 mm wide, 3 pc/m mm long, 2 mm wide, 3 pc/m 2 light 175 mm long, 4 mm wide, 3 pc/m 2 light 175 mm long, 4 mm wide, 5 pc/m mm long, 10 mm wide, 10 pc/m Sound discoloration (congested streaks) light-colored, 30х30 mm, 1 pc/m 2 60х40 mm, 1 pc/m Mineral streaks, sap stains (blue, colored sap stains), wood discoloration during storage 5% of the sheet surface 30% of the sheet surface 50% of the sheet surface (together with false heartwood) 75% of the sheet surface (together with false heartwood) 14. Biological damage (wormholes) within the total amount under the black knot requirements 17

18 FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 15. Discoloration with partial wood damage as separate stripes 30 mm wide, 200 mm long, 2 pc/m of the sheet's length 16. Knotting and patching with wooden inserts 1 pc/m 2 10 pc/m 2 8 pc/m 2 with a gap 1 mm at one side (or 0.5 mm at both sides) with a gap 1 mm at one side (or 0.5 mm at both sides) 17. Double patch 1 pc/m Shake filling Note: Shake filling with patches or putty is subject to agreement with the customer Shakes wider than 2 mm must be filled with glued veneer patches Shakes wider than 5 mm must be filled with glued veneer patches Shakes wider than 5 mm must be filled with glued veneer patches 19. Overlap ridges (telegraphing overlaps) 200 mm long, 10 mm wide, 3 pc/sheet 600 mm long, 10 mm wide, 5 pc/sheet 10 mm wide 18

19 FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 20. Overlap 100 mm long, 2 mm wide, 1 pc/m of the sheet's width 300 mm long, 2 mm wide, 2 pc/m of the sheet's width 600 mm long, 4 mm wide, 2 pc/m of the sheet's width 21. Manufacturing stains (beam traces, lines) 10% of sheets per bundle 22. Glue stain 1% of the sheet surface 2% of the sheet surface (3 to 21 mm thick plywood) 5% of the sheet surface (24 mm thick and more) 5% of the sheet surface (3 to 21 mm thick plywood) 10% of the sheet surface (24 mm thick and more) 5% of the sheet surface (3 to 21 mm thick plywood), 10% of the sheet surface (24 mm thick and more) 23. Mechanical defects (pinholes, saw cuts) within the total amount under the black knot requirements 24. Scratches, grooves, pimples, ridges 0.5 mm deep, 120 mm long, 10 mm wide 0.5 mm deep, 120 mm long, 10 mm wide 120 mm long 19

20 FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 25. Warping 26. Adhesive thread occurrence 27. Blisters, delamination, bark patches 28. Sander skips (uneven sanding) 29. Face veneer oversanding 30. Metal inclusions 31. Edge defects caused by sanding, cutting (fringe), veneer shortage Ignored in plywood 6.5 mm thick, allowed in plywood over 6.5 mm thick; 10 mm/m of the plywood sheet's diagonal length Ignored in plywood 6.5 mm thick, allowed in plywood over 6.5 mm thick; 15 mm/m of the plywood sheet's diagonal length 5 mm off the edge 5% of the sheet surface 50% of the sheet surface 1% of the sheet surface (3 to 21 mm thick plywood) 2% of the sheet surface (24 mm thick and more) nonferrous metal staples 5 mm wide along the edge 10 mm wide 5% of the sheet surface 25 mm wide 20

21 FLAWS IN WOOD AND PROCESSING DEFECTS В Sel S Sel В S ВВх ВВ СР WGE WG С СС 32. Coarse peeling 5% of the sheet surface 15% of the sheet surface 33. Waviness (sanded plywood), rough saw cut, ripple 34. Rough surface Rm roughness value according to GOST 7016, in µm, max: 100 for sanded plywood, 200 for unsanded plywood 35. Pockets (without bark inclusions) within congested streaks size (60х40 mm), 1 pc/m Pasted veneer chips 150 mm long, 30 mm wide, 1 pc/sheet 21

22 22 NOTES

23 NOTES 23

24 SVEZA