ANSI ASSP Z9.6-2018 pdf free download – EXHAUST SYSTEMS FOR GRINDING, POLISHING AND BUFFING.
1.1 Scope.
The requirements and emission and exposure control principles described in this standard represent the minimum criteria intended
1 ) to protect the health of personnel engaged in and working in the vicinity of grinding, polishing and buffing operations; and
2) to control contaminants generated by those operations.
1.2 Application. The standard applies to processes, equipment and operations that use power-driven machinery to grind, polish or buff a product without the use of a liquid coolant. Where liquid coolants are used, the cooling fluid may be emitted as a mist, aerosol or vapor and additional provisions will be required by the user to control exposures, pooling of liquids, draining of ducts, use of mist eliminators, and so forth, that are not covered in the standard. 1.3 Where federal, state or local regulations or codes are more stringent, those regulations and codes shall have control.
2. REFERENCED STANDARDS AND PUBLICATIONS
2.1 General. The regulations, codes, standards and guidelines cited in Sections 2.2,2.3 and 2.4 contain provisions that through reference constitute provisions of this American National Standard. The related documents cited in2.5 contain additional information, but are not essential for complying with the requirements of this standard.
2.2 American National Standards
ANSI/ASSP Z9.2,Fundamentals Governingthe Design and Operation of Local ExhaustSystems
ANSI/ASSP Z9.7，Recirculation of Air fromlndustrial Process Exhaust Systems
ANSI/ASSP Z9.10,Fundamentals Governingthe Design and Operation of Dilution Venti-lation Systems in industrial Occupancies
ANSI/ISEA Z87.1，Occupational and Educa-tional Personal Eye and Face ProtectionDevices
2.3occupational Safetyand HealthAdministration Standards.
Code of Federal Regulations，Title 29,Part1910,Section 94(b), Grinding,Polishing andBuffing Operations
Code of Federal Regulations，Title 29, Part1910, Section 133, Eye and Face ProtectionCode of Federal Regulations，Title 29，Part1910, Section 134,Respiratory Protection
Code of Federal Regulations，Title 29,Part1910，Subpart z,Toxic and HazardousSubstances
2.4 Other Publications.
lndustrial Ventilation: A Manual of Recom-mended Practice，26th Edition. Cincinnati,OH:ACGIH.
ThresholdLimit Values for ChemicalSubstances andPhysical Agents andBiological Exposure lndices. Cincinnati, OH:AcGiH.
2.5 Related Documents.
Code of Federal Regulations，Title 29, Part1910,Section 94,Ventilation
NFPA 79，Electrical Standard for IndustrialMachinery
NFPA91,ExhaustSystems forAirConveying of Vapors,Gases,Mists，andParticulate Solids
NFPA 484,Combustible Metals
NFPA68,Explosion PreventionbyDeflagration Venting
NFPA77,Recommended Practice on StaticElectricity
Hemeon’s Plant and Process Ventilation, 3rdEdition. Boca Raton，FL: Lewis Publishers,1999
3.DEFINITIONS
The following definitions explain terms usedin this standard.
3.1 Air Cleaning Equipment. A device orcombination ofdevicesforseparatingcontaminants from the air handled by anexhaust ventilation system.
3.2 Balanced. In local exhaust systems，abalanced system is one in which the desiredair flowrate is achieved simultaneously in allbranches of the system.
3.3 Branch Duct. A duct connecting anexhaust hood to a main or submain duct.
3.4 Commissioning, Commissioning Plan.process or plan in which an exhaustventilationsystem’sperformanceisidentified, verified and documented before,during and after design,construction orremodeling to assure proper operation andcompliance with codes, standards and userintentions.
3.5 Contaminant. Also，Air Contaminant,Stressor. A substance (smoke, dust,fume,mist, vapor or gas) whose presence in air isharmful, hazardous or a nuisance to humans.
3.6 Control Velocity. Also, Capture Velocity. The velocity of air at a point in space sufficient to draw contaminants and contaminated air into an exhaust hood.
3.7 Cradle. A movable fixture, upon which the part to be ground or polished is supported.
3.8 Cut-off Wheels. Wheels of metal or organic bonded abrasives used for sawing and cutting.ANSI ASSP Z9.6 pdf download.