Third Party Inspection and Vendor Surveillance at Ho Chi Minh City Supplier Works

What vendor surveillance at a Ho Chi Minh City works actually involves

Vendor surveillance is a programme of defined interventions inside your supplier's factory, run against your purchase order and your specification rather than against the shop's internal quality plan. It has four modes and they are not interchangeable. Document review happens before anyone cuts plate. Witness and hold points are scheduled events tied to specific stages. In-process surveillance is unscheduled presence on the shop floor between those events. Expediting runs alongside all of it and reports on delivery rather than conformity.

The reason all four are needed is that fabrication defects are cheap to correct at the moment they are created and expensive at every point afterwards. A misaligned fit-up costs an hour to reset before welding, half a day to gouge out after welding, and a shift of crane time and a re-issued drawing if it is discovered during trial assembly. If it survives to site, it becomes a change order. Surveillance is a schedule of opportunities to catch each class of defect at its cheapest moment.

What surveillance is not is a substitute for the supplier's own quality function. The shop remains responsible for building to the contract. The third party inspector verifies, records and, where necessary, stops. Where a buyer needs the underlying procedures and acceptance criteria written properly in the first place, that is a separate engagement, and our ASNT Level III consulting practice handles procedure development and technical authority independently of the surveillance scope.

Reviewing the inspection and test plan before anyone cuts plate

The ITP is the contract for the inspection campaign and almost every downstream dispute traces back to a weak one. A good ITP lists every activity in fabrication sequence, names the governing document and clause for each, states the acceptance criterion, assigns a point status for the manufacturer, the purchaser and any statutory party, and records the record that the activity must produce. A weak ITP lists stages with a column of ticks and no clause references at all.

The specific weaknesses to look for on a Vietnamese fabrication order are consistent. Point status is assigned generically rather than by risk, so a first-article fit-up carries the same status as the fiftieth. Acceptance criteria are cited as the code name with no clause, so the shop applies its own reading. The NDE row does not say which joints, at what percentage, by which method, or when relative to heat treatment. And the coating rows are frequently absent altogether even though the coating scope is often larger in value than the welding scope.

Fixing the ITP costs a day of engineering time before production release. Arguing about it in month three costs the schedule, because by then the shop has built to its own interpretation and the disagreement is about accepting completed work rather than about how to build the next piece.

The pre-inspection meeting and why it should not be a formality

The pre-inspection meeting is where three documents get reconciled: your purchase order specification, the drawings as issued for construction, and the shop's quality plan. They are almost never identical, and the differences are usually small enough to survive a document review and large enough to matter. A drawing revision the shop never received. A welding procedure that covers the plate thickness but not the actual joint configuration. A consumable brand substituted for local availability.

The meeting is also where the practical mechanics of the campaign get settled: who the inspector notifies and by what route, what constitutes readiness, how a non-conformance report is raised and who has authority to disposition it, where the inspector works and what access to the shop floor and the record office is granted. Access sounds trivial until an inspector is confined to a meeting room and shown parts on request.

Attend it in person if the order is significant. A pre-inspection meeting conducted by email produces agreement in principle and no shared understanding of what the shop actually does when the schedule tightens.

In-process surveillance on structural steel, skids and packaged equipment

Between scheduled points, the value comes from unannounced presence. The things that only in-process surveillance catches are behavioural rather than dimensional. Welders working outside their qualified range because the qualified man is on another bay. Preheat applied with a torch and judged by eye rather than measured with a contact pyrometer at the specified distance from the joint. Consumables left out of the oven overnight and returned to the rack in the morning. Grinding used to blend a weld toe into acceptability rather than to prepare a repair.

On structural steelwork the recurring finding is welder continuity. Vietnamese fabrication shops carry real turnover, and it spikes after Tet, when a proportion of the workforce does not return and new labour arrives in February. A welder qualification record dated December means nothing if that welder is no longer on site, and continuity periods lapse quietly. The weld map with a named welder per joint is the control, and it only works if somebody checks the names against the current qualification register.

On skids and packaged equipment the recurring finding is interface control. The vessel is right, the piping is right, the structure is right, and the three do not meet. Verifying interfaces on the shop floor against the model, and confirming them by measurement before break-down for shipping, is a great deal cheaper than discovering it at site. Where the interfaces are complex or the module is going into an existing plant, 3D laser scanning and as-built capture at the trial assembly stage removes the argument entirely.

Material traceability and the EN 10204 3.2 trap

Vietnamese fabricators buy plate, sections and pipe from Chinese, Korean, Japanese and domestic mills, and the paperwork quality varies accordingly. The verification is mechanical: match the heat number stamped or stencilled on the material to the certificate, confirm the certificate is the right type, and confirm that when the plate is cut the marking is transferred to every piece before the original mark is lost. That last step is where traceability is broken most often, and once it is broken it cannot be restored.

The commercial trap is the certificate type. EN 10204 type 3.1 is issued by the manufacturer's own independent inspection department. Type 3.2 requires validation by the purchaser's representative or an independent inspection body, in addition to the manufacturer. Buyers routinely write 3.2 into the purchase order because it appears in the parent specification, then appoint nobody to countersign, and 3.1 certificates arrive instead. Nobody notices until a client or certifying body audits the data book years later.

Positive material identification is the second control, and on alloy and stainless it should be one hundred per cent on pressure-retaining and safety-critical parts rather than a spot sample. PMI is fast, non-destructive and settles the question that certificates alone cannot: whether the certificate on file belongs to the metal in front of you.

Codes, welder qualification and the certification mismatch nobody checks

Because Ho Chi Minh City fabricators serve several export markets at once, a single shop may run AWS D1.1 for one bay, EN 1090-2 with ISO 3834-2 for another and ASME Section VIII for pressure parts in a third. That is not a problem in itself; competent shops manage it. The problem is qualification records crossing between systems. Welders qualified to ISO 9606-1 presented against an ASME Section IX requirement, or vice versa, are not interchangeable, and neither are the procedure qualification records behind them.

The EN 1090 execution class is the equivalent trap on the structural side. A shop with factory production control certified for EXC2 accepting an EXC3 order has taken on a different regime of welding coordination, traceability and NDE, and the certificate on the wall does not cover it. Ask which execution class the shop's certification actually carries and compare it against the class your order invokes, before the order is placed rather than at first article.

NDT personnel are the third mismatch. Certification to ISO 9712 through a recognised body and certification under an employer written practice built on ASNT SNT-TC-1A are different instruments with different validity conditions, and a purchase order that names one while the technician holds the other is a finding. Where a supplier's own qualification programme needs building or a client wants its personnel certified to a defensible scheme, structured NDT training to SNT-TC-1A and ISO 9712 is a separate service Atlantis provides.

Expediting: reading the delivery date from the shop floor

A progress report shows what the shop wants you to see. A weekly presence in the fabrication bay shows what is actually happening, and the two diverge earliest at the point where recovery is still possible. The leading indicators are physical: plate that has not arrived, a bay standing idle, a heat treatment queue at a subcontractor, a rising weld repair rate, blast and paint work stalled because the humidity has been above the coating window for a week.

That last one is specific to the region and it is chronically underestimated. Through the wet season, ambient humidity around Ho Chi Minh City routinely pushes the steel temperature to within three degrees of dew point, which closes the coating window. Blasted steel flash-rusts within hours in those conditions and has to be re-blasted. A programme that assumes coating throughput is constant across the year is a programme that will slip, and no amount of expediting pressure changes the weather.

The other structural schedule fact is Tet. The Lunar New Year shutdown is one to two weeks of closure followed by several weeks of reduced output as labour returns unevenly. A delivery schedule that runs a critical path straight through late January and February without allowance is fiction, and it is worth challenging at order placement rather than accepting and expediting against it later.

The release documentation package and what the release note certifies

Release is a documentary act. The inspector signs a release note only when the ITP is closed point by point, every non-conformance is dispositioned and closed, and the data book is indexed and complete against the contract's document list. The release note references that index. It does not certify that the equipment is fit for purpose, and it should not be written as if it does.

The packages that fail are rarely missing the big items. They are missing the small ones: a consumable certificate for one batch, the calibration certificate for the pyrometer used at preheat, a technician's vision record, a coating batch number, the closure signature on an NCR that was in fact corrected months earlier. Assembling the book progressively across the campaign rather than in the last week is the only reliable fix, and it is a legitimate hold-point activity in its own right.

On multi-order campaigns the accumulation of these records becomes an asset in itself, and it is worth holding somewhere queryable rather than in a folder tree. Clients running continuous vendor surveillance across several suppliers keep their ITP status, NCR register and certificate index inside inspection management software, which turns the question of whether a purchase order line is releasable into a lookup instead of a week of chasing.

What actually happens when a hold point is waived

Hold points get waived under schedule pressure, and the waiver almost always originates with the buyer rather than the shop. The shop reports readiness with insufficient notice, the inspector cannot attend, and someone in procurement authorises the shop to proceed to keep the delivery date intact. The point is recorded as waived, everyone moves on, and the risk is transferred silently from the shop to the buyer.

The consequences follow a predictable shape. A waived fit-up point produces alignment discovered at trial assembly. A waived NDE point produces radiographs reviewed only in the data book, after the joint is coated and shipped, when the only remedy is site repair. A waived coating hold point produces adhesion failure in the first year of service, at which stage the argument is about who owns the surface preparation record that nobody witnessed.

The disciplined response is not to refuse all waivers, which is unrealistic on a live schedule. It is to require that each waiver is a written decision by a named person with the residual risk stated, and to convert the waived point into a documented review at the next available stage. A waiver that is a decision is manageable. A waiver that is an omission is a liability that surfaces years later, usually during a claim.

How Atlantis staffs a Ho Chi Minh City surveillance campaign

Inspection teams mobilise from Houston or Hyderabad to the supplier's works and remain deployed for the duration of the contract. That is the operating model and it is deliberate: one inspector who knows the specification, the drawing revision history, the open non-conformances and the particular habits of that shop, present across the whole campaign rather than a different face each month. Continuity is what makes month two cheaper than month one.

Scope is set to match how the work is actually placed. Most vendor surveillance runs monthly or campaign-based against a series of purchase orders, with a defined visit pattern, an agreed report format and a named escalation route. Coverage can be intensified around critical stages and reduced during periods of low activity without changing the personnel, which is the practical benefit of a deployed inspector over a call-off pool.

Inspectors are ASNT and ISO 9712 qualified in the relevant methods and work to the client's specification, not a generic checklist. Every visit produces a report the same week, non-conformances are raised on the day they are found, and the data book is built progressively rather than assembled at the end. To scope a campaign against a specific set of Vietnamese suppliers, start with a consultation and we will work back from your purchase orders and delivery dates.

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