These engineering guides explain the standards, equipment, and validation steps behind cGMP process systems in plain language — what a cleanroom classification actually means, how CIP differs from SIP, what IQ/OQ/PQ proves, and how to choose a process-piping contractor. They are written by Paul Industries, a single-source process-equipment and sanitary-piping contractor serving pharmaceutical, biotech, cosmetic, nutraceutical, and food & beverage facilities across the US East Coast.
Process & equipment guides
What Is a Cleanroom?ISO 14644 classifications, particle limits, and how cleanrooms are built and controlled.Read →What Is Passivation? (and Electropolishing vs Passivation)How passivation restores the corrosion-resistant layer on stainless process piping, and how it differs from electropolishing.Read →What Is a Bioreactor?How bioreactors and fermenters work, and single-use versus stainless-steel systems.Read →IQ, OQ, PQ ExplainedWhat installation, operational, and performance qualification each prove — and why they matter for cGMP.Read →What Is Orbital Welding?Why automated orbital welding produces the repeatable, documented welds hygienic piping requires.Read →RO vs DI WaterReverse osmosis versus deionization — how each works and where each fits in a high-purity water system.Read →USP Purified Water vs WFI (Water for Injection)The specifications that separate USP purified water from WFI, and how each is produced and distributed.Read →What Is Process Validation?How process validation demonstrates a system consistently produces product meeting its specifications.Read →CIP vs SIPClean-in-place versus sterilize-in-place — what each does, how CIP works, and when you need both.Read →What Is Sanitary Piping & ASME BPE?What makes piping “sanitary,” and how the ASME BPE standard governs hygienic process systems.Read →How to Choose a Process-Piping ContractorThe credentials, documentation, and capabilities to look for before awarding a sanitary-piping project.Read →