Category Archives: Turbine Oil Reliability

Repeatability and Reproducibility Calculations in Turbine Oil Analysis Turbine engineers sometimes take one oil sample from the same turbine reservoir, split it into two or three bottles, and send the bottles to different laboratories. The objective is simple: “Let us compare the laboratories and see which one is accurate.” Then the reports come back, andContinueContinue reading “Repeatability and Reproducibility Calculations in Turbine Oil Analysis”

Turbomachinery Major Inspections and Turnarounds How Turbine Oils Must Survive Until the Next Planned Outage In modern power plants, LNG facilities, refineries, petrochemical plants, compressor stations, offshore platforms, and steel industries, turbomachinery is expected to operate continuously for years between major inspections. During this period, turbine oil becomes one of the most critical reliability assetsContinueContinue reading “Turbomachinery Major Inspections and Turnarounds”

All Khash Practical Experiences in the Field From Machinery Lubrication to Turbine Oil Reliability, Varnish Control, Oil Analysis, and Bearing Failure Learning Introduction: Practical Experience Is Not Written in Certificates Alone In the lubrication and reliability field, knowledge does not come only from books, standards, certificates, or training courses. Real knowledge comes when theory meetsContinueContinue reading “All Khash Practical Experiences in the Field”

Deeper Technical Review: All Synthetic Oil Types Used in Turbomachinery Synthetic oils are not one family. They are several different lubricant chemistries, each with very different strengths, weaknesses, compatibility limits, and turbomachinery applications. In turbomachinery, the word synthetic can include: PAO — Polyalphaolefin Synthetic esters PAG — Polyalkylene glycol Phosphate esters Polyol esters Diesters Alkylated naphthalenes SiliconeContinueContinue reading “Deeper Technical Review: All Synthetic Oil Types Used in Turbomachinery”

100 Mistakes in Turbine Oil Analysis and Filtration That Can Cause Catastrophic Failures A. Sampling Mistakes Sampling from the drain valve onlyThis may collect settled sludge, water, or dead-zone contamination, not representative circulating oil. Sampling from stagnant linesA sample from a non-circulating point may hide active varnish, particle, water, and additive stress. Sampling cold oilContinueContinue reading “100 Mistakes in Turbine Oil Analysis and Filtration That Can Cause Catastrophic Failures”

Why It Happens and What It Means In turbomachinery, one of the most interesting and dangerous patterns is when the journal bearing vibration and bearing metal temperature do not increase smoothly, but instead show a repeated saw-tooth trend: temperature rises → vibration rises → sudden partial recovery → rises again → drops again → repeats This isContinueContinue reading “Saw-Tooth Pattern of Journal Bearing Vibration and Temperature in Varnished Turbomachinery”

Which Materials in a Turbomachinery Lubrication System Attract More Varnish — Chemistry, Metallurgy, and Surface Polarity In turbomachinery lubrication systems, varnish does not deposit randomly. It preferentially deposits on surfaces where the surface energy, polarity, temperature profile, flow regime, electrostatic condition, and metallurgy/oxide chemistry make the surface attractive to polar degradation products in the oil. This is whyContinueContinue reading “Which Materials in a Turbomachinery Lubrication System Attract More Varnish — Chemistry, Metallurgy, and Surface Polarity”

Dear friends and readers, Thank you for visiting my website and following my technical articles here. This website is my dedicated space for sharing deeper knowledge about turbine oil reliability, lubrication, oil analysis, varnish control, bearing failures, rotating equipment reliability, and practical field experience from power plants, oil & gas, petrochemical, steel, cement, and heavy industries. ButContinueContinue reading “Read My Articles on LinkedIn Too”

Khash MLE CertifiateDownload What Khash Learned Through Noria Machinery Lubrication Engineer Training and MLE Certification From Lubrication Knowledge to Lubrication Engineering Completing Noria’s Machinery Lubrication Engineer training and later achieving the ICML Machinery Lubrication Engineer — MLE certification changed my view of lubrication completely. Before this journey, lubrication could easily be seen as a technical activity: selecting oil, selectingContinueContinue reading “What Khash Learned Through Noria Machinery Lubrication Engineer Training and MLE Certification”

Turbine Oil Sampling Frequency and Test Scope ASTM D4378, OEM Practice, and a Practical Reliability-Based Approach In many plants, turbine oil sampling is treated as a calendar activity: monthly, quarterly, every six months, or yearly. But for turbine oils, the correct question is not only “how often should we sample?” The correct question is: What is theContinueContinue reading “Turbine Oil Sampling Frequency and Test Scope – ASTM D4378, OEM Practice, and a Practical Reliability-Based Approach”