Sahawatthanakit (1988) Co., Ltd.
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Articles, news, and technical insights on construction materials, pallet racking, lubricants, and Thai industrial standards — sourced and cited from trusted references.

All (137)Lubricants, Coolants, Cutting Fluids & Food-Grade (19)Rust Prevention & Anodes (15)Industrial Paint & Coatings (14)Refrigerants (18)Warehouse Racking (12)Welding Blankets & Insulation (8)Solar (14)Engineering Services (19)
Industrial centrifugal pump installed in a chemical plant with mechanical seal and VFD drive in Thailand

Selecting an Industrial Process Pump + Preventing Cavitation (NPSH): Centrifugal vs Positive Displacement, BEP, and VFD Energy Savings per ANSI/HI–ISO for Thai Plants

Buyer's guide to industrial process pumps: differentiate Centrifugal vs Positive Displacement → calculate NPSHa to prevent cavitation → operate within BEP (70–120%) → cut electricity with VFD (Affinity Laws) → supplier checklist + ANSI/HI–ISO 13709/API 610/API 682 standards for plants in Thailand.

Industrial PumpCentrifugal PumpPositive Displacement
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Industrial water treatment system with softener tanks, RO membrane skid, and pH control for a factory in Thailand

Industrial Water Treatment: Boiler Feedwater, Cooling Water, RO/Process Water, and Wastewater Compliance — Selection + Thai Effluent/ASME/WHO Standards for Plants

Buyer's guide to industrial water treatment: separate boiler feedwater–cooling water–process/RO water–wastewater streams → choose the right treatment process for each stream → worked cycles-of-concentration example → contractor checklist + ASME/ABMA/WHO/Thai DIW/PCD standards for factories in Thailand.

Industrial Water TreatmentBoiler FeedwaterCooling Water
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Measuring and mitigating harmonics at a factory MDB with a power quality analyzer and active harmonic filter

Harmonics in Factories — Fix Overheating Transformers & Failing Capacitor Banks per IEEE 519 with Reactors / Filters / AHF

A guide to fixing harmonic distortion in Thai factories caused by VFDs/UPS/rectifiers: 6 warning signs (failing capacitor banks, overheating transformers/neutrals, nuisance breaker trips), the difference between THD-V / THD-I / TDD, the IEEE 519-2022 limits (THD-V 5% at 1–69 kV / 8% at ≤1 kV and TDD by Isc/IL), the mitigation ladder from cheap to costly (3–5% line reactor → passive filter → detuned capacitor → 12/18-pulse → Active Harmonic Filter), how to choose, and why you must run a 7-day Power Quality Audit per IEC 61000-4-30/4-7 before buying a filter — plus MEA/PEA implications and transformer K-factor derating per IEEE C57.110.

engineeringharmonicsieee-519
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Rooftop lightning protection system with air terminals, down conductors and an earth test pit on a Thai factory

Factory Earthing & Lightning Protection — Designing to IEC 62305 / EIT to Stop Equipment Damage and Pass TOR & Utility Requirements

A practical guide to designing earthing (grounding) and lightning protection systems (LPS) for Thai factories and buildings: how safety earthing per IEC 60364 differs from lightning protection per IEC 62305, the IEC 62305-2 risk assessment that decides whether you even need an LPS (R1 vs RT), the four protection levels LPL Class I–IV (rolling sphere 20/30/45/60 m, mesh size, down-conductor spacing), Type A/B earth terminations, target ground resistance ≤5 ohm, fall-of-potential measurement, Wenner soil resistivity, TN-S/TN-C-S/TT earthing systems, coordinated SPD Type 1/2/3 per IEC 61643 to protect electronics, exothermic weld vs clamp connections, equipotential bonding and annual inspection — plus what it means for government TOR, utility (MEA/PEA) connection, and insurance conditions.

engineeringearthinggrounding
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Electrician in arc-rated suit and face shield working at an MDB with an arc flash warning label

Arc Flash Safety — Hazard Assessment & Incident Energy Analysis to NFPA 70E / IEEE 1584, Choosing the Right PPE Category for Thai Factories

An arc flash guide for Thai factories: how arc flash differs from electric shock and why it's more dangerous (arc temperatures up to ~19,000°C plus blast), the two PPE-selection methods you must never mix — Incident Energy Analysis per IEEE 1584-2018 vs the NFPA 70E PPE Category table, what incident energy (cal/cm²) means, the 1.2 cal/cm² second-degree-burn threshold, the arc flash boundary, the PPE Category 1–4 table (4/8/25/40 cal/cm²), the Arc Flash Study workflow (short-circuit → coordination → calculation → labeling), reducing energy at source via the hierarchy of controls (de-energize + LOTO before PPE, relay/maintenance mode, arc-resistant switchgear, remote racking), arc-rated clothing (ATPV/EBT, IEC 61482) and NFPA 70E labels — plus what it means for Thai electrical-safety law, TOR, and insurance.

engineeringarc-flashnfpa-70e
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Capacitor bank panel for power factor correction in an industrial plant

Power Factor Correction for Factories — Stop Paying MEA/PEA's 56.07 Baht/kVAR Penalty with a Capacitor Bank

How to fix low power factor in a Thai factory: why MEA/PEA charge when kVAR exceeds 61.97% of kW (PF < 0.85) at 56.07 baht/kVAR, how to size a capacitor bank (Qc = P(tanφ1−tanφ2)), fixed vs automatic APFC, the harmonics trap from VFDs that needs a detuned reactor per IEEE 519 / IEC 61921, and the ROI that is usually under one year.

engineeringpower-factorcapacitor-bank
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