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| Common Number or Symbol | Range of "Ra" Values (µin) | Explanation of Type of Weld Finish or Finishing Process |
| #AW | Greater than 250 | Welds not cleaned or in an "As Welded/ As Is" condition. |
| #1W | Greater than 250 | Welds to be stainless steel wire brushed or buffed with Behr-Tex type blending wheel, some weld splatter removal. |
| #2W | 125 or Less | Welds rough ground smooth and flush with #47 grit hard rock, then #60 grit flap wheels, square bobs, fire crackers or sanding belts; includes weld splatter and some heat tint removal. |
| #3W | 60-80 | Welds finished using #9W and #2W processes plus a final #100 grit sanding process; usually an exterior type weld finish when polishing required. |
| #4W | 40-70 | Welds finished using #9W, #2W and #3W processes plus additional #120/#150 grit sanding process; usually a food grade interior finish and/or exterior weld finish for food and pharmaceutical applications. |
| #4WE | Less than 50 | Welds finished as #4W with a final electropolish finish after completion of fabrication. |
| #5W | 20-50 | Welds finished using a combination of #9W, #2W, #3W and #4W processes plus a final #180 grit sanding process; usually a pharmaceutical standard interior common finish. |
| #5WE | Less than 30 | Welds finished as #5W with a final electropolishing after completion of fabrication. |
| #6W | 15-30 | Welds finished using a combination of #9W, #2W, #3W, #4W and #5W processes plus a final #240 grit sanding process in conjunction with a #240 grit greaseless compound over red/gray wheels for final luster. |
| #6WE | Less than 20 | Welds finished as per #6W with a final electropolishing after completion of fabrication. |
| #7W | 10-20 | Welds ground finished using a combination of #9W, #2W thru #6W processes plus a final #320 grit sanding process in conjunction with a #320 grit greaseless compound over red/gray wheels for final luster and finish. |
| #7WE | Less than 10 | Welds finished as per #7W with a final electropolishing after completion of fabrication. |
| #8W | 5-10 | Welds finished using steps #9W, #2W-#7W processes plus a jewelers rough compound over fine red/gray wheels to obtain finest mirror-like luster. |
| #8WE | Less than 5 | Welds finished as per #8W with a final electropolishing after completion of fabrication. |
| #9W | 125-250 | Welds rough ground smooth, not necessarily flush, using #47 grit hard rock stone, plus removing weld splatter and some heat tint. |
| #10W | 80-100 | Welds finished using #9W and #2W processes plus the addition of #80 grit sanding with weld splatter and heat tint removal. |
| #11W | Greater than 250 | Welds to be fine silica sand (#81) blasted with weld splatter removed and only rough weld areas removed prior to blasting. |
| #12W | Greater than 250 | Welds to be glass bead blasted (#3 Size), includes removing weld splatter and some grinding or rough areas prior to blasting. |
| #13W | Greater than 250 | Welds to be cleaned with pickling paste for removing heat tint only, no grinding included but some weld splatter removal included. |
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Ouverture le: 25-Jan.2005 Dernière mise à jour 25-Jan-2005 Création et gestion du site par: Gérald Joyce | |
