Applications

DCS technology applies differently across process industries — the units, control loops, and safety priorities of a refinery are not those of an LNG plant or a pharmaceutical facility. These guides cover how distributed control systems are actually applied by industry, unit by unit — refining, LNG, and pharmaceutical manufacturing — including the critical control loops, safety integration, and platform realities of each, grounded in real project experience and industry documentation.

DCS in pharmaceutical GAMP 5 V-model validation lifecycle diagram showing the design track on the left descending from User Requirements Specification to Functional Specification to Design Specification to Configuration at the bottom of the V, with the validation track on the right ascending from Installation Qualification IQ to Operational Qualification OQ to Performance Qualification PQ, with traceability arrows linking each design specification to its corresponding qualification test, plus the regulatory framework panel showing FDA 21 CFR Part 11, EU Annex 11, and GAMP 5 ISPE requirements

DCS in Pharmaceutical: The Best Practitioner Guide to Distributed Control Systems in Pharma Plants

Daniel Reed / June 9, 2026

DCS in Pharmaceutical: The Best Practitioner Guide to Distributed Control Systems in Pharma Plants By Daniel Reed / June 23,

DCS in LNG overview diagram showing all major units of a liquefaction train — feed gas reception with metering and gas chromatography 1,000 to 2,000 I/O, AGR amine treating for H2S and CO2 removal 2,000 to 3,500 I/O, molecular sieve dehydration 1,500 to 2,500 I/O, mercury removal protecting aluminum equipment 500 to 1,000 I/O, heavies removal 1,500 to 2,500 I/O, and the liquefaction section as the heart of the plant containing propane refrigeration with 30 to 50 MW driver, the Main Cryogenic Heat Exchanger cooling to -160 degrees Celsius, and mixed refrigerant compression with 50 to 130 MW driver totaling 4,000 to 7,000 I/O, plus LNG storage in 160,000 to 250,000 cubic meter tanks, LNG loading with cryogenic marine arms, and utilities and offsites 5,000 to 10,000 I/O

DCS in LNG: The Best Practitioner Guide to Distributed Control Systems in LNG Plants

Daniel Reed / June 9, 2026

The gas-to-liquids facility in Africa where I spent several years earlier in my career wasn’t an LNG plant — it

DCS in refining overview diagram showing all major refinery units and their I/O scale — crude oil feed entering the Crude Distillation Unit with 2,000 to 4,000 I/O, then Vacuum Distillation Unit with 1,500 to 2,500 I/O, feeding the conversion units including FCC with 3,000 to 5,000 I/O as the most complex unit, Hydrocracker with 4,000 to 6,000 I/O, Reformer with 2,000 to 4,000 I/O, and Delayed Coker with 1,500 to 2,500 I/O, plus treating units (naphtha, diesel, FCC feed hydrotreaters, alkylation, sulfur recovery) and utilities and offsites totaling 20,000 to 50,000 I/O for a large integrated refinery

DCS in Refining: The Best Practitioner Guide to Distributed Control Systems in Petroleum Refineries

Daniel Reed / June 9, 2026

The refinery I most often visit on the large oil and gas mega-project in Asia isn’t technically a refinery —