One of the process involved in rubber lining is substrate inspection, surface preparation and Surface Finish Inspection after blasting process. Before that, I want to introduce you all the standard for abrasive blasting cleaning.
Introduction to Industry Standards for Abrasive Blast Cleaning
•ASTM Abrasive Cleanliness Standards
•ASTM Compressed Air Cleanliness Standard
•ASTM Surface Profile/Roughness Measurement Standards
•ISO Dust Assessment Standard
•SSPC Abrasive Standards
•SSPC/NACE Surface Cleanliness Standards
•SSPC Surface Profile Measurement Frequency Standard (draft)
Here the all item that you should control when to use abrasive blasting:
· Quality of equipment and abrasive media
· Establishing process control to monitor quality
· Effect of ambient conditions on final abrasive blast cleaning
· Surface Cleanliness
· Surface profile and roughness
· Post-blast dust inspection
Quality of Abrasive Blast Cleaning Equipment
•Maintain Project Schedule (production)
ØCompressor Capacity
ØBlast Nozzle Wear
ØBlast Nozzle Air Pressure
•Maintain Quality
ØVerify Clean, Dry Compressed Air
•Compressor Capacity
ØRequirements based on multiple factors/conditions.
ØNo. of operators, nozzle sizes and required pressure are important considerations.
ØEquipment manufacturers publish charts for guidance.
•Monitoring Blast Nozzle Wear
ØAbrasive wears opening, reducing productivity
ØWear monitored using Pressure Blast Analyzer Gauge (nozzle orifice gauge)
ØReduction in nozzle pressure reduces productivity
ØPressure monitored using hypodermic needle pressure gauge
•Monitoring Compressed Air Cleanliness
ØOil or water in compressed air can contaminate abrasive and surfaces
Ø“Blotter Test” performed per ASTM D 4285
ØRequirement of SSPC Abrasive Blast Cleaning Standards
In This article I just will talk about Quality of Abrasive Blast Cleaning Equipment of Surface Finish Inspection. For the other item that you should control just see in the next article or just click on that name to get link. If you have any comment or hestation to ask just put yours in the coment box below.
