Paul Industries fabricates and installs high-purity distribution systems across Ohio, and on ultrapure water the correct material is usually not stainless steel. Above 18.2 megohm-centimeter, water is an aggressive solvent with nothing left in it, and it will take metal ions from the inside of a stainless pipe and carry them to the wafer. Ultrapure water distribution is therefore built from high-purity fluoropolymers and joined by thermal fusion, which is a different trade from orbital welding with a different set of failure modes.
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Ultrapure water dissolves the pipe you put it in
This is the point at which experience in pharmaceutical piping stops helping and starts misleading, and Ohio is where a contractor is most likely to meet both requirements in the same year.
Water is a solvent, and its appetite is a function of what it already holds. Compendial pharmaceutical water still contains measurable dissolved species and is specified against limits that stainless steel comfortably satisfies. Ultrapure water at above 18.2 megohm-centimeter has had essentially every ion stripped out of it, and what it does next is try to replace them from whatever surface it touches.
Against a stainless surface that means extraction of metal ions into the water, continuously, at a rate that rises with temperature and with time in contact. For a pharmaceutical system this is irrelevant. For a specification that cares about contamination at parts per billion and about metal residues on a wafer surface, the distribution system becomes a source rather than a conduit.
So ultrapure distribution is built from high-purity fluoropolymers, and the materials science question becomes extractables and particle shedding rather than corrosion. Two consequences follow for anyone contracting this work.
The joining method is completely different. Fluoropolymer systems are joined by thermal fusion, where the pipe ends are melted and pressed together under controlled temperature, pressure and time. Done properly the joint is homogeneous with the pipe and presents no crevice. Done poorly it leaves an internal bead protruding into the bore, which is a particle generation site and a place for microbial growth, or a partially fused joint that fails later. The quality control is machine-parameter based, and the record is the fusion parameter log, which plays exactly the role a weld log plays on a stainless system.
Velocity is a design requirement rather than a preference. Ultrapure loops are run at continuous high velocity with no stagnant volume anywhere, because stagnant ultrapure water grows biology and picks up extractables. That means genuinely zero dead legs rather than a permitted ratio, point-of-use valves designed so that no stub sits off the main flow, and a loop sized for the velocity first and the flow demand second.
Three piping disciplines, one building
| Service | Typical material | Joining | Governing concern |
|---|---|---|---|
| Ultrapure water | High-purity fluoropolymer | Thermal fusion | Extractables, particle shedding, zero stagnation |
| Pharmaceutical compendial water | Stainless steel | Orbital welding | Cleanability, drainability, microbial control |
| Process chemicals | Fluoropolymer or lined | Fusion or specialized fittings | Chemical compatibility and containment |
| High-purity gases | Electropolished stainless | Orbital welding with purge | Moisture and oxygen exclusion |
| Food and beverage process | Stainless steel | Orbital welding | Cleanability and hygienic design |
| Plant utilities | Carbon steel or copper | Conventional | Pressure and durability |
The reason to set this out is that Ohio projects frequently carry several of these at once, and the common procurement error is treating them as one piping package awarded to whoever is cheapest on footage. They are different trades with different qualifications, different quality records and different failure modes, and a contractor who does not distinguish between them in the bid has not understood the scope.
What the turnover package should contain
| Record | Captured when | Recoverable later? |
|---|---|---|
| Fusion parameters per joint, with operator and machine | At each joint | No |
| Material certification and lot traceability | At receipt | Rarely, once installed |
| Operator qualification for the fusion process | Before work starts | Only by requalifying and reworking |
| Pressure and integrity testing | Before service | Yes, but disruptively |
| Flush and qualification data to specification | At commissioning | Yes, by repeating it |
| Cleanliness protocol during installation | Throughout | No |
That last row is the one most often absent from a bid and most often decisive. High-purity fluoropolymer components arrive bagged and clean, and they stay that way only if the installation discipline requires it: components unbagged at the point of assembly rather than staged open on a floor, open ends capped between operations, and a controlled area for fusion work. A system assembled from components that sat open in a construction environment will take far longer to flush to specification, and sometimes will not get there.
Frequently asked questions
Do you install high-purity piping in Ohio?
Yes, statewide across Columbus, Cleveland, Cincinnati, Dayton and Toledo: stainless sanitary piping for pharmaceutical and food systems, electropolished stainless for high-purity gases, and fluoropolymer distribution for ultrapure water and process chemicals. We price those separately in the bid rather than as one package, because they are different trades and we perform both.
Why is ultrapure water piping not stainless?
Because water above 18.2 megohm-centimeter has had essentially every ion removed and behaves as an aggressive solvent, extracting metal ions from a stainless surface continuously and at a rate that rises with temperature and contact time. For a pharmaceutical specification that is irrelevant. For a specification concerned with parts per billion and with metal residue on a wafer, the pipe becomes a contamination source.
How are fluoropolymer systems joined?
By thermal fusion: the pipe ends are melted and pressed together under controlled temperature, pressure and time so that the joint becomes homogeneous with the pipe and presents no crevice. The quality control is machine-parameter based, and the fusion parameter log plays the same role that a weld log plays on a stainless system.
What goes wrong with a fusion joint?
Two things, mainly. An internal bead protruding into the bore is a particle generation site and a place for growth to establish, and it is invisible from outside. A partially fused joint may hold pressure at commissioning and fail later. Both come from parameters outside specification or from poor preparation, which is why the parameter record per joint matters as much as the pressure test.
Why is velocity a design requirement?
Because stagnant ultrapure water grows biology and picks up extractables, so the loop cannot be allowed to stand anywhere. That means continuous high-velocity recirculation, genuinely zero dead legs rather than a permitted ratio, point-of-use arrangements with no stub sitting off the main flow, and a loop sized for velocity first and flow demand second.
Can the same crew do stainless and fluoropolymer work?
Only with separate qualifications, and it should be stated explicitly in the contract. Orbital welding stainless and thermal fusion of fluoropolymer are different processes with different equipment, parameters and failure modes. A crew competent in one is not thereby competent in the other, and the qualification records should be requested at tender in both cases.
Why does installation cleanliness matter so much?
Because high-purity components arrive bagged and clean and only stay that way if the installation discipline requires it. Components should be unbagged at the point of assembly rather than staged open on a construction floor, open ends capped between operations, and fusion work done in a controlled area. A system built from components left open will take far longer to flush to specification, and sometimes will not reach it.
Do high-purity gas lines use the same approach?
No. High-purity gas distribution is electropolished stainless, orbitally welded with continuous inert purge, because the contaminants being excluded there are moisture and oxygen rather than extracted metal ions. That is a third discipline again, and a project carrying ultrapure water, process chemicals and high-purity gases is carrying three distinct piping scopes.
Does Ohio energy cost affect piping decisions?
Marginally. At 7.10 cents per kilowatt-hour against a national average of 8.13 (EIA, 2024), Ohio is a comparatively cheap place to run the continuous recirculation an ultrapure loop requires, which removes any temptation to reduce velocity to save pumping energy. On this kind of system that would be a poor trade in any state.
How do I get a quote for Ohio piping work?
Use the form on this page or call 201-450-8280. Useful inputs are which services are in scope and their governing specification, line sizes and approximate footage, whether the work is new build or tie-in, what access and cleanliness conditions exist on site, and whether several piping disciplines sit within the same project. If a specification has already been written, send it, because it usually settles the material question immediately.
How is the material selected among the fluoropolymers?
By temperature, purity requirement and cost. Polyvinylidene fluoride is common for distribution at moderate temperatures and lower cost, while perfluoroalkoxy and related materials are specified where the highest purity or higher temperatures are required. The decision follows the purity specification at the point of use rather than a general preference.
Are fusion parameters recorded?
On high-purity work they should be, with machines that log temperature, time and force for each joint so that the record ties to the joint’s location. That log is the equivalent of a weld record on a stainless system, and its absence leaves a distribution system whose joints have no evidence behind them at all.
Does thermal expansion matter more with plastics?
Considerably. Fluoropolymers expand far more than stainless for the same temperature change, so a long run will move noticeably between ambient and operating conditions. Routing must provide offsets to absorb it, and anchors and guides have to direct the movement, otherwise the load goes into joints and supports that were not designed for it.
How does support spacing differ?
Plastic systems need supports far closer together than metal, because the material is less stiff and will sag between them, and sag in a high-purity distribution line creates exactly the low points and flow disturbances the design is trying to avoid. Support spacing is a specification item derived from material, diameter and temperature.
What valves suit ultrapure water?
Valves with fluoropolymer wetted parts, minimal internal volume, no crevices and a design that does not trap liquid, selected so that the valve does not become the dirtiest point in a very clean system. Conventional sanitary valves designed for stainless systems are generally unsuitable because their wetted materials contribute contamination.
Does static build up in plastic pipework?
It can, because flowing liquid through non-conductive pipe generates charge, and in some configurations that is a consideration for both safety and for particle attraction to surfaces. Where it matters, conductive or static-dissipative grades are available. It is a consideration that does not arise at all with metal systems and is easily overlooked.
How long does flushing take at startup?
Longer than expected, often weeks, because a new system must clean up its own contribution before it can meet specification. Particle counts and organic carbon fall gradually as the surfaces stabilise and construction residues clear. That flush period is a real part of the schedule and it cannot be shortened by adding treatment capacity.
Can fluoropolymer systems be repaired?
They can, by cutting out and refusing a section, but each repair reopens the system, introduces a cleanliness risk and requires the flush and verification sequence afterwards. That is why the joint quality and the support design matter so much: repairs are disruptive out of proportion to their apparent size.
How is the system verified at handover?
At the points of use under real flow conditions: resistivity, organic carbon, particles and dissolved oxygen as applicable, with the acceptance criteria drawn from the tool requirements. Verification at the treatment plant proves the plant works and says nothing about what the distribution added between there and the wafer.
What documentation should be provided?
Material and component certification, fusion joint records with parameters, pressure and leak test results, the cleanliness protocol followed, flushing records and point-of-use verification. As with gas systems, the documentation exists because the properties that matter cannot be inspected once the system is assembled and running.
What pumps suit an ultrapure loop?
Pumps with wetted parts of appropriate fluoropolymers, low particle generation and seal arrangements that do not contribute contamination, sized for continuous duty because the loop never stops. Conventional sanitary pumps designed for stainless systems are frequently unsuitable because their wetted materials and seals contribute what the system exists to exclude.
How is instrumentation selected for these systems?
By wetted material before anything else, because a sensor is a component sitting permanently in the fluid. Resistivity, particle, organic carbon and dissolved oxygen instruments all have to be rated for the purity, and an instrument that contributes contamination will corrupt both the water and the measurement it was installed to provide.
Can leaks be detected in a plastic distribution system?
They can, and in areas where a leak would be consequential the usual approach is containment with detection in the annulus or leak detection cable along the route. Fluoropolymer joints rarely fail without cause, but when they do the failure is usually at a joint made outside its parameters, which is another argument for logged fusion data.
How is the system protected during adjacent construction?
By treating it as a live, qualified system inside a construction zone: physical protection, isolation of any branch being worked on, and an assessment of what the work could introduce. In a facility expanding around an operating loop, the tie-in points are the risk, and the verification afterwards has to demonstrate the existing system was not compromised.
What is the commonest installation failure?
Contamination introduced during construction that the system can never fully recover from, usually from components left uncapped, work performed in uncontrolled conditions, or joints made by operators trained on ordinary plastic pipework. The system then underperforms from the first day and no amount of additional treatment capacity corrects it.
Does the design need to allow for future tools?
It should, because these facilities add and move process equipment continuously. That means leaving hydraulic capacity, planning where future points of use would connect without creating stagnant branches, and sizing the loop return for growth. A loop designed exactly to the initial tool set constrains the facility within a year or two.
Planning high-purity piping in Ohio?
Tell us which services are in scope and what specification governs each. Call 201-450-8280 or use the form below.
