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R-32 vs R-410A vs R-22
Refrigerants — which fits the job
- GWP · ODP · price · phase-out timeline
- Retrofit options + Kigali timeline
- A2L safety + ASHRAE 15 / EN 378
Galvanic vs Impressed Current
Cathodic protection — sacrificial anode vs DC
- Capex + OPEX comparison + decision tree
- Soil resistivity + monitoring
- ISO 12696 / NACE / DNV / DPT
Epoxy vs PU vs Acrylic
Industrial paint — choose by UV / chemical / budget
- Lifespan 5-25 years per ISO 12944
- Surface prep SSPC-SP 6/10
- Our industrial paint line: 1K PU primer · epoxy · PU topcoat
ISO 12944 C3 vs C4 vs C5
Choose the paint system by corrosivity category
- DFT 220 / 320 / 400 µm 3-coat
- Surface prep Sa 2 → Sa 2½ → Sa 3
- Zinc-rich primer + PU topcoat (our line)
HFC vs HFO Refrigerant Transition
Kigali phase-down + ESG roadmap
- GWP 675-4,470 (HFC) vs 1-7 (HFO)
- R-22 phase-out 2030 · R-1234yf premium 4-6×
- ASHRAE 34 + ISO 817 safety class
Zinc-rich vs Epoxy vs PU
Anti-corrosion paint — 3 different mechanisms
- Sacrificial · barrier · UV-weather
- ASTM B117 salt spray 1,000-5,000 hr
- 1K PU primer / solvent-free epoxy / PU topcoat
Rust Converter vs Sandblast vs Epoxy Primer
Rust treatment methods — choose by TOR + budget + service life
- SSPC SP10/SP6 · ISO 8501-1 Sa 2.5/Sa 3
- Tannic/phosphoric · zinc-rich · polyamide
- Price/m² + 2-25 year life + ORAFON Thailand
VCI Paper vs Silica Gel vs Rust Inhibitor
Rust prevention for shipping/storage — choose by protection period
- MIL-PRF-3420 · ASTM A924 · Mil-D-3464
- VCI 2-5 yr · silica 6-18 mo · Tectyl 5-10 yr
- Military / SRT / export — crate + pallet ฿80-450/m²
Recovery vs Recycle vs Reclaim Refrigerant
Handling used refrigerant — choose by EPA rules + cost
- EPA Section 608 · AHRI 700 · TIS 3008
- Recovery into a cylinder · recycle on-site · reclaim to virgin spec
- Save 30-60% vs buying new + Kigali compliance
R-290 vs R-600a vs R-744 (Natural)
Natural refrigerants — propane / isobutane / CO₂
- GWP 3 / 3 / 1 — near zero vs R-32 (675)
- A3 flammable charge limit (IEC 60335)
- CO₂ transcritical + commercial refrigeration
Magnesium vs Zinc vs Aluminum Anode
Anodes — choose the metal by the water it sits in; water and concrete only
- Fresh water = Mg · seawater = Zn
- Seawater/brackish = Al-Zn-In
- Each metal has water it must not go in
Chlorinated Rubber vs Coal Tar vs Bitumen
Heavy-duty coatings — marine · buried · immersed structures
- ISO 12944 Im1/Im2/Im3 immersion class
- DFT 200-1000 μm · cure / barrier mechanism
- VOC + Thai DIW Annex environmental rules
Polyurea vs Epoxy vs PU Floor
Factory floor coatings — choose by chemicals + cure time
- Cure 1 hour vs 7 days + chemical resistance
- ฿250-1,500/m² + 5-25 year life
- ASTM D4060 / D7027 + ISO 12944-5
Screw vs Piston vs Scroll
Air compressors — choose by CFM + duty + noise
- CFM 0.5-2,000 · duty 50% vs 100%
- Efficiency 0.18-0.30 kW/CFM + VSD 25-40% saving
- ISO 1217 + ISO 8573-1 air quality
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