Technical hub
Engineer notes for anticorrosion work in India. ISO 8501-1 cleanliness, BLAST APEX pot-hose-nozzle charts, media choice and inspection. Not a substitute for the project specification.
ISO 8501-1
Sa 2.5 is very thorough blast cleaning under ISO 8501-1 (near-white metal, comparable to SSPC-SP 10). BLAST APEX pots, abrasives and gauges in India.
ISO 8501-1
Sa 3 is ISO 8501-1 blast cleaning to visually clean steel (white metal, comparable to SSPC-SP 5). When it is required, and cost versus Sa 2.5.
Kit matching
Match blast nozzle bore to blast-hose ID and compressor CFM. BLAST APEX pairings for Models 150 to 2001-R, and why an undersize hose kills production.
Air supply
Size screw compressors by nozzle CFM at working pressure, not by HP or tank litres. BLAST APEX pot air demand vs the CK/XL screw range.
Consumables
Tungsten vs boron carbide blast nozzle life. Why Al₂O₃ destroys WC fast, and when BLAST APEX tungsten carbide nozzles are the right buy.
Abrasive media
Copper slag, garnet, steel grit, steel shot and aluminium oxide compared for Indian blasting: profile, dust, reuse, and when BLAST APEX supplies each.
QA
What engineers check after Sa 2.5: surface profile, soluble salts, dew point, dry-film thickness and holidays. BLAST APEX gauges and inspection services.
Air
CFM at 80, 100 and 120 PSI for #3 to #8 nozzles, plus a Boss screw-compressor size that can hold that flow. BLAST APEX, Bhiwandi.
Media
Kilograms per hour of garnet-class media by nozzle size at 80, 100 and 120 PSI. Use it to bid shipyard and tank jobs. BLAST APEX.
Hose
PSI lost in 19, 25, 32 and 38 mm blast hose against #4, #6 and #8 nozzles. Match hose ID to the nozzle or the pot lies about its pressure.
Pot
How many kilograms of garnet, steel grit, copper slag, aluminium oxide or glass bead fit a 150 L, 300 L and 500 L blast pot.
Profile
What 60, 80, 100 and 120 PSI at the nozzle does to particle speed and typical profile. BLAST APEX field chart.
Maintenance
Slow press-up, pulsing abrasive, constant leak, no depressurise. What the pop-up and gasket are doing and what to replace.
Safety
Slow dump, screaming relief, delayed release, over-pressure. Treat a stuck relief as a stop-work, not a noise complaint.
QA
Clean steel rusts when salts, dew point and delay stack. What to measure and how soon to prime on Indian humidity.
Nozzle
Damp media, oversize grit, worn orifice, wet air. How to unstop a nozzle without wrecking the liner.
Nozzle
Life hours, hardness, impact toughness and cost. When BLAST APEX still sells tungsten, and when boron carbide pays back on aluminium oxide.
Media
Hardness, recycle life, dust, finish and nozzle wear. Which media BLAST APEX sends for site slag work vs shop recovery floors.
Profile
16-20 through 100+ mesh versus typical peak-to-valley on garnet, steel grit and aluminium oxide. Measure; do not guess.
QA
Peeling, mud-cracking, holidays and blisters after blasting. Cause, tool to prove it, BLAST APEX gauge kit.
Safety
Air, PPE, pot relief, hose couplings, hearing and dust. OSHA/ANSI style field list for BLAST APEX crews and buyers.
Glossary
Short definitions: anchor profile, Sa 2.5, CFM, holiday, dew point, metering valve. Linked to BLAST APEX product pages.
Air
Duty cycle, CFM stability, oil carry-over and noise. Why BLAST APEX quotes Boss screw machines for blast pots, not piston compressors.