Brewery process piping carries more different fluids through one cellar than almost any other food plant: hot wort, cold beer under carbon dioxide pressure, high-proof spirits, caustic and acid CIP, glycol, steam and water, often within a few feet of each other. The engineering that keeps them apart, drains them completely and cleans them without stopping production is hygienic engineering, but it does not need the validation and documentation of a pharmaceutical plant, and paying for that is the most common mistake in beverage projects. Paul Industries installs brewhouse, cellar and packaging piping and designs brewing CIP systems for breweries, distilleries, cideries and ready-to-drink plants sized from regional to national.
The fluids and what each demands of the piping
| Fluid | Piping | What matters |
|---|---|---|
| Wort (hot, sugary, near-boiling) | 304 or 316L sanitary tube, welded | Insulation, expansion, no pockets where wort cools and sets |
| Beer and cider (cold, carbonated, under pressure) | Sanitary tube, welded or clamped, rated for cellar pressure | Oxygen exclusion, CO2 purge, low points that hold beer |
| Spirits (flammable, high-proof) | Stainless, welded, with grounding and bonding | Electrical classification of the still house, vapor control, no plastics |
| CIP caustic and acid | Supply and return in stainless, sized for turbulent flow | Separation from product, drainable returns, no cross-connection to glycol |
| Glycol | Insulated stainless, copper or PVC to jackets and heat exchangers | Balanced flow to every jacket, air elimination, isolation per tank |
| Steam and hot water | Carbon steel or copper to ASME B31.3, stainless where it contacts product | Trapping, condensate return, culinary steam where it touches product |
Weld or clamp
Small breweries clamp everything because it can be taken apart; large breweries weld everything because clamp gaskets are the first thing to leak, harbor beerstone and cost labor. The sensible line runs between: welded sanitary tube for permanent transfer lines, wort lines and CIP mains, clamp connections at tank inlets, pumps, filters, hose stations and anything that gets swapped between batches. Welded lines are orbital or manual sanitary welds with an argon purge and inside inspection, because a rough weld on a beer line is where beerstone and biofilm start. Clamp joints get a gasket material that survives caustic, acid, peracetic sanitizer and cold beer: EPDM for most duties, silicone or PTFE where hot wort or spirits demand it.
Sizing a brewing CIP system
The brewhouse and the cellar clean on different schedules and different chemistry. The brewhouse cleans after every brew: kettle, whirlpool and wort lines carry hot protein and hop soils plus scale from the boil, and need hot caustic and a periodic acid cycle. Cellar tanks clean between batches, days or weeks apart, with cold caustic or acid-based cleaners that do not consume CO2 in a closed tank, followed by a peracetic sanitizer. A brewing CIP system therefore has at least two circuits with separate recipes, and a brewery that cleans the brewhouse while a fermenter is being emptied needs both to run at once. Spray coverage in conical fermenters, with their cones, dry-hop ports and racking arms, is proven with a riboflavin test; a rotating jet head usually replaces a spray ball once fermenters pass about 60 barrels.
CO2, oxygen and closed-tank cleaning
Beer is damaged by oxygen and cellar tanks are under CO2 pressure, so cleaning a tank means managing gas: venting safely, avoiding vacuum collapse when hot caustic reacts with CO2 (the reason cellar cleaning uses cold or acid-based chemistry), and purging with CO2 before refilling. CIP piping to cellar tanks includes vacuum and pressure relief, and the CIP program is written so nobody can put hot caustic into a sealed carbonated tank. The same applies to brite tanks and to the transfer lines to packaging.
Distillery specifics
Spirits are flammable and the still house is often an electrically classified area, which constrains pumps, instruments and lighting and rules out plastic piping for high-proof product. Stills, condensers and spirit receivers are piped in stainless with grounding, mash and wash lines behave like brewery wort and beer lines, and CIP of stills and condensers is a hot caustic and acid cycle on copper and stainless surfaces with care for the copper. Bottling and barrel-filling lines are sanitary tube with clamp connections and CIP or COP as size dictates.
Utilities around the cellar
Glycol is the utility that most often limits a growing brewery: every new fermenter adds jacket load, and a chiller sized for the original cellar runs out of capacity long before anyone notices the fermentation temperatures drifting. Glycol piping is balanced so every jacket gets flow, isolated per tank, insulated, and sized for the expansion the brewery is planning rather than the cellar it has. Steam for the kettle and hot water for CIP, mashing and packaging are the other loads, and a brewery’s water treatment, usually reverse osmosis with mineral addition, feeds all of it.
What Paul Industries installs for breweries and distilleries
Brewhouse, cellar and packaging process piping; wort, beer and spirit transfer lines; CIP supply and return with fixed or portable CIP skids; fermenter, brite and blending tank setting and connection; glycol chillers and distribution; steam and hot water; water treatment; and the millwright work of rigging tanks, stills and packaging lines into a building that was rarely designed for them. The documentation is what a brewer needs to run and expand the plant, not a pharmaceutical validation package.
Standards referenced: 3-A Sanitary Standards · 21 CFR 117 · ASME B31.3 · ASME BPE
Frequently asked questions
Should brewery piping be welded or clamped?
Welded for permanent transfer lines, wort lines and CIP mains, where clamp gaskets would leak, harbor beerstone and cost labor; clamped at tank inlets, pumps, filters, hose stations and anything swapped between batches. Small breweries start clamped and weld more as they grow; welded lines use orbital or manual sanitary welds with an argon purge and inside inspection.
What stainless grade is used for brewery process piping?
304 sanitary tube is common and adequate for wort, beer and CIP in most breweries; 316L is used where chlorides or acid cleaners are aggressive, in coastal plants and where the brewery wants one grade throughout. Spirits and high-proof product are piped in stainless with no plastics because of flammability, and copper is used in stills and condensers for flavor, not in transfer lines.
How is a brewing CIP system sized?
Around the brewhouse and cellar cleaning on different schedules and chemistry: hot caustic and periodic acid for kettle, whirlpool and wort lines after every brew; cold caustic or acid-based cleaners for cellar tanks between batches; separate circuits so both can run at once; supply pumps sized to the spray device in the largest fermenter or turbulent flow in the largest line; and a peracetic sanitizer step. Rotating jet heads replace spray balls as fermenters grow.
Why can hot caustic damage a fermenter?
Caustic absorbs carbon dioxide, and a sealed tank full of CO2 sprayed with hot caustic can pull enough vacuum to collapse. Cellar tanks are cleaned with cold caustic or acid-based cleaners, vented properly, fitted with vacuum relief, and the CIP program is written so hot caustic cannot be routed to a carbonated tank.
What is beerstone and how is it removed?
Beerstone is calcium oxalate scale that forms on tanks, lines and heat exchangers from the oxalate in wort and the calcium in brewing water, and it shelters bacteria. It is removed by an acid cycle, phosphoric or nitric based, run periodically on the brewhouse and cellar; caustic alone leaves it, and a rough weld or clamp gasket is where it starts.
Does a brewery need a CIP skid or a portable CIP cart?
Small breweries clean a few circuits a day and manage with a portable CIP cart. Once the brewhouse and cellar must clean at the same time, or cleaning frequency makes water and chemical cost matter, a fixed skid with recovery tanks and separate circuits becomes cheaper to run and faster. Many regional breweries run a fixed skid for the brewhouse and portable units in the cellar.
How are conical fermenters cleaned in place?
By a spray device at the top sized to the tank, with coverage proven by a riboflavin test, because the cone, dry-hop port, racking arm and sample valve are where spray balls miss. Rotating jet heads are usual above about 60 barrels. The circuit runs cold caustic or an acid-based cleaner with the tank vented, then sanitizer, then a CO2 purge before the next fill.
What piping does a distillery need that a brewery does not?
Spirit lines in grounded stainless with no plastics, sized and routed for a flammable liquid; pumps, instruments and lighting rated for the still house’s electrical classification; still and condenser connections in copper and stainless; and spirit receivers and barrel-filling lines that drain completely. Mash and wash lines behave like brewery wort and beer lines.
How does glycol piping limit a growing brewery?
Every new fermenter adds jacket load, and a chiller and distribution sized for the original cellar runs short long before fermentation temperatures visibly drift. Glycol piping is balanced so every jacket gets flow, isolated per tank, insulated, and sized for planned expansion; adding a chiller later is far easier than re-piping a cellar.
Do breweries need pharmaceutical-grade documentation?
No, and buying it is the most expensive mistake in beverage projects. A brewery needs drawings, weld and pressure test records, equipment manuals, CIP recipes and cycle records, and a clear layout it can expand. It does not need validation protocols, installation qualification or ASME BPE turnover packages unless a customer or co-packing contract specifies them.
What sanitizer is used in brewery CIP?
Peracetic acid is the usual final step because it needs no rinse, works cold and leaves no flavor; chlorine dioxide and hot water are alternatives. Iodophor is used on small equipment. The sanitizer step follows the caustic or acid cycle and the rinse, and the tank is purged with CO2 before the next fill.
How is wort piping different from beer piping?
Wort is near-boiling, sugary and protein-rich, so wort lines are insulated, allowed to expand, sloped to drain so wort cannot cool and set in a pocket, and cleaned hot after every brew. Beer is cold, carbonated and oxygen-sensitive, so beer lines are pressure-rated, purged with CO2, kept free of low points that hold beer, and cleaned cold between batches.
Can a brewery add CIP to an existing cellar?
Yes. The usual retrofit adds CIP supply and return mains through the cellar with a clamp connection at each tank, a fixed or portable skid, spray devices sized to each tank with coverage tests, and recipes per circuit. Tanks without CIP ports get them added at the top and the return at the cone or outlet.
What water treatment does a brewery need?
Most breweries run reverse osmosis on municipal or well water and rebuild the mineral profile for each beer style, with carbon filtration to remove chlorine and chloramine, which otherwise produce off-flavors. The treated water feeds the brewhouse, CIP and packaging; a plant that grows without upgrading RO capacity runs out of brewing water first.
What is culinary steam and when does a brewery need it?
Steam that contacts food directly and is therefore produced with approved boiler chemicals and filtered; a brewery needs it where steam touches product, such as direct-injection kettles or some pasteurizers. Steam that only heats a jacket or heat exchanger is plant steam to ASME B31.3 and does not need to be culinary.
How are stills and condensers cleaned?
With a hot caustic cycle for organics and an acid cycle for scale, circulated through the still, condenser and lines, with chemistry chosen to be compatible with copper surfaces, which caustic and some acids attack. Many distilleries run a lighter, more frequent cycle than a brewery to protect the copper, and inspect it visually.
Who installs tanks and stills in a building not designed for them?
Millwright and rigging is part of the scope: fermenters, brite tanks and stills often arrive larger than the door, and get rigged through openings, over walls or through the roof, set on pads that were poured for the load, leveled and connected. Planning the rigging route before ordering the tank saves more money than any other decision in a brewery build-out.
What is a typical brewery piping and CIP project scope?
Brewhouse piping (mash, lauter, kettle, whirlpool, wort cooling), cellar piping (transfer, CIP mains, glycol), packaging supply, CIP skid or cart with circuits and recipes, glycol chiller and distribution, steam and hot water, water treatment, and the tank setting and rigging, delivered with drawings and pressure test records. Distilleries add the still house piping and classified-area coordination.
Where are breweries and distilleries expanding, and does Paul Industries travel there?
Across the East Coast and nationwide, from Virginia: brewery and distillery projects mobilize a crew, CIP equipment and welding gear to the plant, and our state pages describe the regulatory and engineering conditions where beverage capacity is being built. Regional breweries and distilleries expanding into new cellars are the typical project.
What is included in a brewery CIP system quote?
A complete brewery CIP system quote covers the skid (tanks, supply pump, heater, dosing, controls), the supply and return mains through the brewhouse and cellar, a clamp connection and spray device at each tank with coverage testing, the recipes per circuit, startup and operator training. Quotes that stop at the skid leave the piping and the spray devices, which decide whether the system cleans, to be found later.
Related: Distillery & Brewery Process Systems · Process Piping · Clean-in-Place (CIP) & SIP Systems · CIP Skids: Portable and Fixed Clean-in-Place Systems · Process & Storage Tank Installation · Process Chiller Installation & Service · Sanitary welding · Request a quote · Brewery Tanks, Glycol Systems and Wort Cooling · Brewery Water Treatment Systems (RO, Carbon, Mineral Dosing)