Piping and valve selection – the unseen highway of flavour transfer

Brewery piping is often an afterthought—yet it is the circulatory system of your facility. Procurement managers who focus only on vessels may overlook that a poorly designed pipe network can introduce oxygen, harbour bacteria, and reduce flow efficiency. Search queries like “How to design sanitary brewery piping” are common among engineers planning new facilities.

Question: “What is a dead-leg, and why is it dangerous?”

A dead-leg is any pipe section where liquid does not flow during normal operation—for example, a capped tee or an unused branch. Stagnant product in dead-legs becomes a breeding ground for biofilms and can contaminate your beer during transfer. Our piping designs use fully sweepable tees with no 90° elbows where possible, and we specify zero-dead-leg valves (e.g., diaphragm or ball valves with full-port design) for all product lines.

Question: “What is the right pipe surface finish for a brewery?”

For product contact surfaces, we require electropolished 316L stainless steel with an internal surface roughness of Ra ≤ 0.4 µm. This minimises bacterial adhesion and makes CIP more effective. We also specify automatic orbital welding for all butt-welded joints—no manual weld globules that can trap residue.

Question: “How do I choose between ball valves and butterfly valves?”

Butterfly valves are common for larger lines (≥DN50) and are easy to clean—our design uses sanitary butterfly valves with seat-in-body and no threads in the flow path. For smaller lines or where precise throttling is needed, diaphragm valves (with PTFE membrane) provide zero dead-space and are fully drainable. We never use globe or gate valves in product circuits.

Question: “Can pipe diameter affect my beer quality?”

Absolutely. Undersized pipes create high velocity ( >2 m/s) that can shear yeast cells and cause foaming. Oversized pipes increase cleaning volume and allow laminar flow, which encourages sediment. We calculate optimum pipe diameters based on your flow rate, product viscosity, and CIP requirements—typically 1.5–2.0 m/s for wort transfer and 1.0–1.5 m/s for finished beer.

Question: “How do I ensure my entire pipe network is leak-proof?”

We perform a hydrostatic pressure test (1.5 times working pressure) on every assembled system, followed by a trace helium leak test on welded joints—sensitivity down to 10⁻⁶ mbar·L/s. All test reports are documented and handed over with your equipment.

Piping is not just plumbing—it’s your beer’s final mile

A well-designed pipe system reduces oxygen pick-up, simplifies cleaning, and extends the lifespan of your equipment. It is the difference between a brewery that runs smoothly and one that constantly battles contamination.

→ Send us your facility layout (dimensions and vessel positions). Our piping engineers will design a complete sanitary pipe routing with valve schedules, material take-offs, and installation drawings—tailored to your space and budget.