Degrees of Cleanliness of Blast-Cleaned Surfaces*

1 KEY: Steel where mill scale has started to flake and light rusting METALWHITE METALBRUSH-OFFCOMMERCIALNEAR- white METALWHITE METALBRUSH-OFFCOMMERCIALNEAR- white METALWHITE METALKEY: Steel where all mill scale has flaked off and complete rusting has : Steel where pitting and complete rusting has taken adherent mill scale and rust may remain on the surface. Mill scale and rust are considered adherent if they cannot be removed with a dull putty 7 NACE No. 4SA-1 COMMERCIALE venly dispersed very light shadows, streaks and discolorations caused by stains of rust and mill scale may remain on no more that 33% of the 6 NACE No.

2 3SA-2 NEAR- white METALE venly dispersed very light shadows, streaks and discolorations caused by stains of rust and mill scale may remain on 5% of the 10 NACE No. 2SA-2-1/2 white METALFree of all visible oil, grease, dirt, dust, mill scale and 5 NACE No. 1SA-3 For the complete official guide to surface Cleanliness , refer to SSPC-Vis-1: Guide and reference photographs for dry abrasive blast cleaning; SSPC Publication 02-12, *Images shown are previously uncoated surfaces, viewed without of Cleanliness of Blast-Cleaned Surfaces* ISO 9001 certified. Clemco is committed to continuous product improvement.

3 2016 Clemco Industries Corp. One Cable Car Drive Washington, MO 63090 Phone: Fax: No. 21932 Rev. F 10 OrificePRESSURE AT THE NOZZLE (PSI)Air (cfm) Abrasive Use Compressor HP5060708090100125140No. 2(1/8 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpNo. 3(3/16 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpNo. 4(1/4 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpNo. 5(5/16 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpNo. 6(3/8 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpNo. 7(7/16 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpNo.

4 8(1/2 ) (cfm)Abrasive (cuft/hr.)Abrasive ( )Compressor hpCompressed Air and Abrasive ConsumptionAbrasive ComparisonSystem Air Volume Requirements @ 100 psiMinimum Compressor Air Line SizesPressure Loss in Air HoseImpact of Nozzle Wear on Air LossProduction Loss3/4 on 150 cfm @ 100 psi through 50 feet of compressor air maximum efficiency, provide large air lines from the compressor to the blast machine. Place the compressor as near as possible to the blast operation. Use the largest air hose SizeIncrease in Air ConsumptionNo. 41/4 ( )No.

5 55/16 ( )60% or more than No. 4No. 63/8 ( )38% more than No. 5No. 77/16 ( )36% more than No. 6No. 81/2 ( )33% more than No. 7 NozzleOrifice SizeVolume of AirPlus HelmetPlus 50% (Reserve)Min. Air RequirementNo. 41/4 ( ) m3/minNo. 55/16 ( ) m3/minNo. 63/8 ( ) m3/minNo. 77/16 ( ) m3/minNo. 81/2 ( ) m3/minNozzle Nozzle Orifice SizeMin. Air Line 33/16 ( )1 ( )No. 41/4 ( )1 ( )No. 55/16 ( )1-1/4 ( )No. 63/8 ( )1-1/2 ( )No. 77/16 ( )2 ( )No. 81/2 ( )2 ( )No. 105/8 ( )2-1/2 ( )No. 123/4 ( )3 ( )MaterialMesh SizeShapeDensity lbs/ft3 MohsFriablility# of CyclesSourceTypical ApplicationsSilica Sand* blast cleaningMin.

6 2By-productOutdoor blast , finishing, deburring, etchingSteel +ManufacturedRemoving heavy scaleGarnet +ManufacturedCleaning, peeningAluminum 8 ManufacturedCleaning, finishing, deburring, etchingSilicon 6 ManufacturedSurface prep on extremely hard substratesGlass 10 ManufacturedCleaning, 10 ManufacturedPaint stripping, deflashing, cleaningBicarbonate of , paint removalXL Corn Hybrid 17 ManufacturedComposite paint removal, adhesive deflashCorn 5By-productRemoving paint from delicate surfacesu = Angular | l = Spherical | *Consult OSHA regulations before using silica sand as a blasting abrasive.