Orbital welding services provide automated GTAW welds on sanitary pipe and tube that are consistent, full-penetration, and documented per joint – exactly what a validated, product-contact system requires. Paul Industries self-performs orbital welding as part of single-source sanitary piping installation, with weld maps, weld logs, and borescope/coupon records.
What our orbital welding services deliver
- Automated orbital GTAW on 316L sanitary pipe and tube
- Per-joint weld records (parameters logged) for validation
- Weld maps, borescope inspection, and coupon documentation
- Manual TIG where an orbital head cannot fit (fittings, tie-ins, repairs)
Why orbital welding for regulated systems
On a product-contact line, a weld is finished when it can be proven, not just when it looks good. Orbital welding generates a documented parameter record for every joint, which feeds directly into the turnover package an auditor expects.
Related: Sanitary process piping · What is orbital welding · Orbital vs manual welding · Request a quote
Frequently asked questions
What are orbital welding services?
Orbital welding services provide automated GTAW welding of sanitary tube and pipe using an orbital head that rotates the arc around a stationary joint. The service covers procedure development, welder qualification, fabrication, weld logging, borescope inspection, and documentation. Paul Industries provides orbital welding for hygienic process systems.
What tube sizes and materials can you orbital weld?
Orbital GTAW handles common sanitary sizes from small instrument tube up through several inches in 316L and other austenitic stainless, plus alloys like AL-6XN and duplex on qualified procedures. Wall thickness and fit-up determine parameters. Paul Industries qualifies procedures to the material and size on each project.
What documentation comes with orbital welding services?
Deliverables typically include a weld log tying each weld to welder, machine, coupon, and parameters; isometric weld maps; procedure and welder qualifications; coupon and borescope inspection records; and material test reports. Paul Industries compiles these into a validation-ready turnover package.
How do you qualify an orbital weld procedure?
A weld procedure specification is developed for the material, diameter, and wall, then proven by test welds and coupons examined against ASME BPE acceptance criteria. Welders and operators are qualified to that procedure. Test coupons are cut and inspected before and periodically during production welding.
What is a weld coupon and why cut them?
A coupon is a sample weld made under production conditions and sectioned or borescoped to confirm penetration, alignment, and absence of oxidation. Coupons are typically made at shift start and at set intervals, verifying the machine and purge are producing acceptable welds before committing to real joints.
How is orbital weld quality inspected?
Internally, with a borescope, against the ASME BPE acceptance criteria. What the examiner is looking for is full penetration without excessive concavity, no sugaring from an inadequate argon purge, misalignment within the permitted limit, and discolouration within the accepted range for the heat tint that remains. Coupons are welded alongside production joints at an agreed rate and sectioned for destructive examination. Every result, pass or fail, is recorded against the weld map with its disposition rather than quietly reworked.
Can orbital welding be done in the field or only in a shop?
Both. Prefabricated spools are welded in a controlled shop for the tightest quality, then field welds tie the spools together on site. Paul Industries fabricates in Kilmarnock, Virginia and mobilizes orbital equipment and qualified welders nationwide for field tie-ins. Call 201-450-8280.
Why is inert gas purging critical in orbital welding?
The weld interior must be shielded with argon on both sides to prevent oxidation (heat tint), which harms corrosion resistance and cleanability. Purge gas is controlled and monitored; inadequate purge shows as discoloration on the borescope. Proper purging is central to acceptable sanitary welds.
How many welds per day can orbital welding achieve?
Fewer than most schedules assume, because the weld itself is the fast part. On shop spool work with good access a machine and operator will typically complete a few dozen small-diameter joints in a shift; in the field, with fit-up, purge setup, access constraints and inspection between joints, the realistic rate is a fraction of that and falls sharply as diameter rises. That is why weld count rather than linear footage drives both cost and schedule, and why prefabrication changes a program more than adding crew does.
What causes orbital welds to fail inspection?
Four causes account for nearly all of it. Inadequate purge, which oxidizes the inside of the joint and produces the granular surface called sugaring, usually from insufficient purge time or a leaking dam. Fit-up error, where misalignment exceeds the permitted tolerance or the gap is inconsistent around the circumference. Wall thickness or heat variation between components, since a procedure qualified for one combination will not necessarily suit another. And contamination on the tube ends, from handling, cutting fluid or storage.
Do orbital welds need passivation afterward?
Yes, sanitary systems are typically passivated after fabrication to restore the chromium-rich passive layer disturbed by welding and handling, per ASTM A967/A380 using citric or nitric processes. Passivation certificates are added to the turnover package. Paul Industries passivates the systems it welds.
How does orbital welding support ASME BPE and cGMP compliance?
By producing a repeatable joint and, just as importantly, a record. An orbital head runs a programmed sequence rather than depending on operator technique, so the joint is consistent and the internal surface has minimal crevice for residue to lodge in, which is the hygienic requirement ASME BPE exists to serve. The compliance half is documentation: procedures qualified to ASME Section IX written against BPE, named welders with current continuity, and every weld logged with machine head, procedure and material heat numbers.
Can Paul Industries provide orbital welding nationwide?
Yes, from Kilmarnock, Virginia, as planned mobilizations rather than local availability. The practical approach is to move as much of the weld volume as possible into the shop before travelling, since a shop joint costs roughly 55 to 120 dollars against 100 to 200 in the field and carries a lower reject rate with controlled fit-up and purge. Crews then mobilize for the tie-ins and final connections that cannot be prefabricated, with dates confirmed at quotation.
What information do you need to quote orbital welding?
Useful inputs are tube material and size, wall thickness, total weld count or isometrics, finish and passivation requirements, ASME BPE compliance level, site location, and schedule. Paul Industries uses these to scope procedure qualification, fabrication, and field work. Call 201-450-8280.
Is orbital welding worth it for a small number of welds?
For a handful of large-diameter or difficult joints, manual GTAW by a qualified sanitary welder may be practical. Orbital welding pays off with weld volume, tight repeatability, and documentation demands. Paul Industries advises which approach fits the job rather than defaulting to one.
How do I start an orbital welding project with Paul Industries?
Send isometrics or a sketch with sizes and wall thicknesses, the material and required surface finish, an approximate weld count if you have one, whether this is shop fabrication, field installation or both, and the inspection and documentation you require. Wall thickness and material combination matter more than buyers expect, because procedures are qualified for specific combinations and an unusual pairing may need a new qualification before work can start. Tell us your shutdown window if the work is a tie-in.
Do you offer orbital welding services near me?
We are not local to most of the country and will not claim otherwise. What we provide is a mobilized crew with welders qualified to ASME Section IX against ASME BPE procedures, with borescope inspection, weld mapping and material traceability included rather than offered as extras. For planned work booked against a window that suits well, particularly where prefabrication offsets the travel. For same-day attendance a genuinely local shop will serve you better, and we will say so at the first call.
Can you orbital-weld sanitary pipe and tube?
Yes, and the distinction between them matters for procedure qualification. Sanitary tube is specified by outside diameter with thin walls and tight tolerance, which is what orbital heads and ASME BPE are built around. Pipe is specified by nominal size and schedule with thicker walls and looser tolerance, and welding it orbitally is possible but needs a procedure qualified for that wall thickness and often a different head. Mixing the two in one system is common and each junction needs its own qualified procedure.
How much does orbital welding cost?
Roughly 55 to 120 dollars per joint for shop spool work and 100 to 200 dollars in the field for small-diameter sanitary tube, with cost rising with diameter and wall thickness. Inspection is priced separately at about 30 to 90 dollars per weld depending on the coupon and borescope rate and whether a full turnover package is required. Quotations expressed per linear foot are worth converting back to a per-weld basis before comparing, because linear pricing hides weld density, which is the real driver.
What inspection do you provide for orbital welds?
Borescope examination of the internal surface against ASME BPE acceptance criteria, at a rate agreed before work starts rather than assumed. Coupons welded alongside production joints and sectioned for destructive examination. Results recorded against the weld map with welder, machine head, procedure, material heat numbers and disposition for any nonconformance. Dated, location-referenced images are included in the turnover package. Where the fluid service category requires it, radiographic examination is arranged in addition rather than instead.
Get an orbital welding quote
Paul Industries is a single-source supplier, installer, and validator – one accountable partner from design through documented startup. Tell us about your project and we will scope it.
How to choose an orbital welding contractor
Eight checks separate a contractor who will deliver a qualified orbital welding scope from one who will deliver a report. Ask all eight, and compare the answers side by side rather than comparing prices.
| Criterion | What a strong answer looks like | Warning sign |
|---|---|---|
| Self-performed work | Named in-house scope in the contract, not the capability statement | “We manage a network of partners” |
| Welding qualification | WPS, PQR and ASME Section IX welder records supplied with the bid | “Our welders are certified” with nothing attached |
| ASME BPE demonstrated | States how surface finish, drainability and dead-leg geometry are verified | Claims compliance without a verification method |
| Passivation | In-house to ASTM A967 with ASTM A380 pre-clean and a stated verification method | Subcontracted, with a certificate of conformance only |
| Who corrects a failed test | Named in the contract before work starts | Has not considered the question |
| Documentation | Turnover package described up front, indexed to your IQ checklist | Assembled after the fact |
| Coverage | Every site you operate, same crews and standards | Single region |
| Examination level | States borescope coverage and who judges acceptance | Leaves examination unquantified |
Paul Industries answers all eight in the left-hand column. Nationwide single-source cGMP contractor, 30+ years in FDA-regulated plants, self-performing design, fabrication, orbital welding, installation, passivation and validation support. Call 201-450-8280.
More questions we are asked
Weld defects in sanitary tube: what you are looking at
A borescope inspection either passes or it does not, but the defect tells you what went wrong in the process — and that is what stops it recurring on the next hundred welds.
| Defect | What it looks like | Cause | Prevention |
|---|---|---|---|
| Sugaring / granulation | Rough, crystalline, sandy surface on the ID | Loss of back purge — oxygen reached the molten root | Purge integrity and adequate pre-purge time; verify with an oxygen monitor, not a stopwatch |
| Heat tint | Straw, blue or rainbow discolouration | Insufficient purge quality — less severe than sugaring, same root cause | Lower residual oxygen; AWS D18.2 defines the acceptable levels |
| Lack of penetration | Root not fused; a visible line or gap | Insufficient amperage, travel too fast, or a joint gap out of tolerance | Correct schedule; square, clean, properly faced tube ends |
| Excess penetration / drop-through | Bead protruding into the bore | Too much heat, or joint gap too large | Reduce amperage; control fit-up |
| Concavity / suck-back | Root sunken below the ID surface | Too little filler for the gap, or excessive purge PRESSURE pushing the root out | Purge pressure matters as much as purge purity |
| Misalignment / mismatch | A step at the ID between the two tubes | Ovality, wall thickness variation, or poor clamping | Match wall thickness and heat numbers; check ovality before fit-up |
| Porosity | Pinholes or scattered voids | Contamination — moisture, oil, residue — or shielding gas problems | Clean and dry the joint; verify gas purity and flow |
| Cracking | Linear defect in weld or heat-affected zone | Restraint, contamination, or the wrong material combination | Control restraint and material matching |
| Arc strike | A small burn mark outside the weld zone | Careless electrode handling | A defect in its own right — it damages the passive layer |
| Tungsten inclusion | Bright inclusion in the bead | Electrode contacted the puddle | Regrind or replace the electrode; correct arc gap |
The two that dominate in practice are purge-related: sugaring and heat tint together account for most rejections on hygienic tube, and both trace to the same discipline — verified oxygen level before striking the arc, and maintained purge through the entire weld and cool-down. Timing a purge is not the same as measuring one, and a system large enough to weld is large enough to justify an oxygen monitor.
All of these are why the weld log matters: a defect trend across a job points at a schedule, a gas supply or a fit-up practice, and that is fixable. An isolated defect is a repair; a pattern is a process problem.
What causes sugaring on the inside of a sanitary weld?
Loss of back purge — oxygen reaching the molten root and oxidizing it, leaving a rough crystalline surface. It is the most common serious defect on hygienic tube welds and it is a purge discipline problem rather than a welder skill problem. Prevention is verified oxygen level before striking the arc and maintained purge through the entire weld and cool-down. Timing a purge is not the same as measuring one, and any system large enough to weld justifies an oxygen monitor.
What is weld concavity or suck-back, and what causes it?
A root that has sunk below the inside surface of the tube, leaving a groove rather than a smooth bore. The causes are insufficient filler for the joint gap, or excessive purge pressure pushing the molten root outward. The second surprises people: purge pressure matters as much as purge purity, and an over-pressurized purge produces a defect that looks like a heat problem but is not. Concavity is unacceptable in hygienic service because the groove is a crevice.
What does a pattern of weld defects tell you?
That it is a process problem rather than a repair. An isolated defect is fixed by cutting it out and re-welding, but a trend across a job points at the weld schedule, the shielding or purge gas supply, or a fit-up practice such as poor tube end preparation or mismatched wall thickness. This is why the weld log matters: without one, each defect looks like bad luck, and the underlying cause continues producing them.
What are the top-rated orbital welding services near me?
Orbital welding quality is verified rather than rated, and the evidence is specific. Ask for welding procedure specifications and procedure qualification records covering your exact tube material, outside diameter and wall thickness, since a qualification at one thickness does not cover another. Ask for welder performance qualifications with current continuity records. Ask what coupon frequency they run, meaning how often a test weld is made and cut for examination, and what borescope rate they apply to production welds. Then ask for sample borescope images and a weld log from a comparable job. Those documents distinguish a competent orbital welding operation faster than any rating, because none of them can be produced without genuine practice.
Which companies offer certified orbital welding services in the United States?
The word certified needs unpacking, because there is no ASME certification for orbital welding as a service. What exists is welder and procedure qualification under ASME Boiler and Pressure Vessel Code Section IX, applied to procedures written for the material and thickness range in question, frequently referencing ASME BPE for hygienic acceptance criteria and AWS D18.1 and D18.2 for weld quality and acceptable discolouration on austenitic tube. Component manufacturers can hold an ASME BPE Certificate of Authorization, but installing contractors cannot, so a contractor claiming to be BPE certified should be asked exactly what they hold. Ask for the qualification records themselves with dates and continuity, since those are the real credential.
What are the advantages of orbital welding for high-purity applications?
Four advantages matter in high-purity service. Repeatability, because the machine holds current, travel speed and rotation to a programmed schedule, so weld one and weld five hundred are effectively identical, which manual welding cannot achieve. Internal profile, since a correctly set orbital weld produces a smooth, full-penetration bead with minimal internal protrusion, and every internal irregularity is a place soil and bioburden collect. Documentation, because the power supply records the actual parameters for each weld and that record becomes qualification evidence. And reduced heat input, which narrows the chromium-depleted heat-affected zone beside the weld, and that zone rather than the weld metal is where corrosion and rouge usually start.
Best industrial pipe welding contractors near me
For industrial rather than hygienic work, screen on code capability and examination logistics. Ask for welding procedure specifications and procedure qualification records covering the material, thickness and process on your job, and welder continuity records. Ask how non-destructive examination is scheduled and by whom, since radiographic examination usually involves a third party and coordination failures there delay test packages more often than welding does. Ask how they build and track test packages, because on a plant of any size that structure determines schedule. Ask about their hot work and tie-in procedures for live systems. Proximity matters for emergency response; for planned work, crew commitment matters more.
How to find a reliable industrial pipe welding contractor in my area?
Start from the code your service requires, since that narrows the field immediately: ASME B31.3 for process piping, B31.1 for power piping, API standards for tanks and refinery work, ASME BPE for hygienic. Then ask any candidate for the three documents that are difficult to fake: procedure qualification records matching your material and thickness, welder continuity records showing each proposed welder is current, and a turnover package from a comparable completed job. Verify insurance limits and site safety prequalification early, since large plants reject contractors on those grounds after selection more often than people expect. Only then compare price, because a bid from a contractor who cannot meet the code requirement is not a comparable bid.
Top-rated industrial pipe welding companies in the US
Rather than a ranking, apply a capability test that any serious contractor passes and a marginal one cannot. Can they produce procedure qualification records for your exact material and thickness range on request. Do their welder continuity records show current qualification for the individuals actually proposed, not the company. Can they show a test package from a completed job including the hydro test record, examination reports and material traceability. Do they self-perform welding or subcontract it, and if subcontracted, whose qualifications apply. And how do they handle a failed examination, since cutting out and re-welding to the original acceptance level is the only correct answer and seal welding over a defect is not.
What certifications should an industrial pipe welder possess?
The individual welder holds a welder performance qualification under ASME Boiler and Pressure Vessel Code Section IX, or AWS D1.1 for structural work, qualified for a specific process, material group, position, and thickness and diameter range. That qualification is tied to a welding procedure specification supported by a procedure qualification record. Critically, it remains valid only while continuity is maintained, generally meaning the welder has used that process within the preceding six months, and lapsed continuity invalidates it. For hygienic work, add familiarity with ASME BPE acceptance criteria and AWS D18.1 and D18.2. Ask for the qualification record and the continuity log together, because the certificate alone does not prove the welder is currently qualified.
How to choose a reliable industrial pipe welding contractor
Judge on method and records rather than price. Confirm welding is self-performed and named in the contract rather than subcontracted after award. Require procedure and welder qualifications for your specific material, thickness and position to be supplied at bid rather than promised later. Establish the examination scope in writing, since the ASME B31.3 fluid service category sets it and ambiguity there is the most common source of change orders. Ask how test packages are structured and tracked. Ask how tie-ins to live systems are isolated and proven. And ask what happens when an examination fails, because the answer reveals whether they treat rework as normal engineering or as a commercial dispute.
How to choose an orbital welding contractor?
Orbital welding is judged on records, because the process itself is machine-controlled and the variable is the operator and the setup. Ask for procedure qualification records covering your exact tube outside diameter and wall thickness, since a qualification at one thickness does not extend to another. Ask what coupon frequency they run, meaning how often a test weld is cut and examined, and what percentage of production welds get a borescope. Ask how they verify purge quality, ideally with an oxygen analyzer reading rather than a timed purge, because heat tint is the direct consequence of poor purge and the chromium-depleted zone beneath it is where corrosion starts. Then ask to see sample borescope images and a weld log.