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 United States.
Process & equipment guides
Standards referenced: ASME BPE · ASTM A967 · ISO 14644-1 · ASTM A380 · ASME B31.3 · 3-A Sanitary Standards
Frequently asked questions
What guides does Paul Industries offer?
Paul Industries’ guides explain the process-equipment topics manufacturers ask about, high-purity water, sanitary piping, ASME BPE, CIP/SIP, cleanrooms, passivation, orbital welding, and validation (IQ/OQ/PQ), so buyers can understand what their facility needs before scoping a project. For project-specific advice, call 201-450-8280.
What topics do the guides cover?
The guides span water systems (USP purified water, WFI, RO/DI), sanitary process piping and ASME BPE, orbital welding and passivation, CIP/SIP and clean steam, cleanrooms and ISO 14644, and process validation including IQ/OQ/PQ. Together they cover the systems Paul designs, builds, installs, and validates.
Who are these guides for?
They are written for pharmaceutical, biotech, cosmetic, nutraceutical, food and beverage, and medical-device manufacturers, engineers, quality staff, and project owners evaluating or specifying process equipment. They translate technical and regulatory topics into plain terms so decision-makers can scope a project confidently.
What is the difference between IQ/OQ/PQ and process validation?
IQ/OQ/PQ is equipment qualification, proving a system is installed, operates, and performs correctly. Process validation is the broader lifecycle proving an entire process reliably yields compliant product. The guides explain each and how equipment qualification feeds overall validation. Call 201-450-8280 for your project.
Where should I start if I’m planning a new water system?
Start with the guides on high-purity water and USP requirements to understand grades (purified water versus WFI), then the piping and validation guides to see how the loop is built and qualified. Once you know roughly what you need, Paul can scope it with you. Call 201-450-8280.
Do the guides explain regulatory standards?
They explain what the standards actually require and, just as usefully, what they do not. A recurring theme across them is over-specification: ASME BPE applied where 3-A Sanitary Standards or plain ASME B31.3 would satisfy the auditor, Water for Injection specified where Purified Water suffices, or a cleanroom classification chosen where a controlled environment would do. The guides are written to help you tell which requirement is real and which was inherited from a previous project.
What is ASME BPE and why does it matter?
ASME BPE is the Bioprocessing Equipment standard governing sanitary piping design, materials, surface finish, weld quality, and drainability for high-purity systems. It matters because it defines what makes a wetted path cleanable and compliant. The guides explain it; Paul builds to it. Call 201-450-8280.
How do the guides help me choose between purified water and WFI?
The water guides explain that purified water suits many non-sterile uses while WFI adds endotoxin control for injectable and sterile products, and they map grades to applications. Knowing which grade each point of use needs is the first step in sizing a system. Call 201-450-8280 to scope yours.
Do you have guidance on CIP and cleaning validation?
Yes. The guides explain clean-in-place design, coverage, flow, temperature, and contact time, and how cleaning is validated, including riboflavin coverage testing. They help you understand what reliable, documented cleaning requires before you specify a system. Call 201-450-8280 for a CIP project.
What do the guides say about passivation?
The passivation guidance explains how citric and nitric passivation to ASTM A967/A380 removes free iron and restores the chromium-oxide layer on stainless steel, improving corrosion resistance and cleanability, and why high-purity systems require it. It also covers rouging and derouging. Call 201-450-8280.
Can the guides tell me how much a project will cost?
They give ranges and the drivers behind them rather than a quotation, and the drivers are usually more useful. Sanitary piping runs roughly 115 to 360 dollars per linear foot, cleanrooms 150 to 1,650 per square foot by class, CIP systems from 200,000 dollars upward driven by circuit count rather than tank size. What moves those numbers most is specification and weld or circuit count, not geography, which is why the guides focus there.
How do the guides relate to Paul Industries’ services?
Each guide corresponds to work Paul self-performs, water systems, piping, welding, passivation, CIP/SIP, cleanrooms, and validation, so the topics you read about are the ones a single accountable contractor can then design, build, install, and validate for you. Call 201-450-8280.
Do the guides cover validation documentation requirements?
Yes. The validation guidance explains the documents a qualification package contains, protocols, executed records, calibration and material certifications, deviation reports, and summary reports, and the ALCOA data-integrity principles behind them. It helps you understand what an audit-ready package looks like.
Are the guides specific to any one industry?
The guides cover principles that apply across pharmaceutical, biotech, cosmetic, nutraceutical, and food and beverage manufacturing, while noting where industry-specific standards differ, such as USP for pharma versus ISO 22716 for cosmetics. Paul then tailors the actual system to your industry. Call 201-450-8280.
After reading the guides, how do I get project-specific advice?
The guides give you the background; a scoping conversation turns it into a plan. Paul reviews your process, water grades, capacity, and validation needs, then designs, builds, installs, and validates the system as one accountable partner. Call 201-450-8280 to move from reading to scoping.
Does Paul Industries only build the systems these guides describe?
Paul designs, fabricates, installs, and validates all the systems the guides cover, and also services them through emergency repair, preventive maintenance, and shutdown/turnaround work. So the same contractor whose guides you read can support the equipment across its whole life. Call 201-450-8280.
Are the guides written for engineers or for buyers?
Both, at different depths. The opening of each guide answers the question a buyer or project sponsor is actually asking, and the detail underneath is written for the engineer who has to specify or review the work. Neither audience has to read the other's half to get an answer.
How current are the standards referenced in the guides?
The guides cite the standard by designation, such as ASME BPE, ASTM A967, ASTM A380 and ISO 14644, so a reader can check the current revision directly. Standards are revised on their own cycles, and the published document is always the controlling version rather than any summary of it.
Do the guides replace the actual standard?
No. They explain what a standard governs, where it applies and what it changes about a design or an installation, so that reading the standard itself is faster and more useful. Compliance is demonstrated against the standard, not against a guide.
Which guide covers water system design?
The water cluster runs from what Purified Water and Water for Injection are, through USP specification and conductivity testing, into filtration methods, membrane versus distillation, and system design and cost. Starting at the specification and working toward the equipment usually produces fewer wrong turns than the reverse.
Which guide should I read before writing a piping specification?
The sanitary piping standards guide and the ASME BPE surface finish guide cover what has to be specified, and the dead leg ratio guide covers the geometry rule that most often gets written incorrectly. The request for bids guide covers what to ask suppliers to quote against.
Do the guides cover cleaning and cleaning validation?
Yes. The CIP versus SIP guide separates the two operations, the clean-in-place system design guide covers coverage, velocity and return sizing, and the cleaning validation requirements guide covers what has to be demonstrated and documented.
Is there a guide on choosing between single-source and multiple vendors?
Yes, and it is written around where the risk actually sits. The recurring failure is not a bad vendor but an unowned gap between the equipment supplier, the installer and the validation party. The guide sets out where those gaps open and how a scope is drawn to close them.
Do the guides include real cost figures?
Where published figures exist they are cited with their source and date, and where they do not the guides explain the cost drivers instead of inventing a number. A cost driver that a reader can apply to their own scope is more useful than a national average that does not fit it.
How do the guides relate to the calculators and tools?
The guides explain the engineering, and the calculators do the arithmetic that follows from it. The dead leg, pipe volume, tank volume, CIP velocity and USP conductivity tools each have a guide that explains what the result means and where the limits sit.
Request a project quote
Tell us about your system, media, and standards — a Paul Industries engineer will follow up to scope your project.