Request a cleanliness report when your specification requires one
Our normal manifold inspection verifies the manufactured component against its drawing and material requirements, including dimensions, threads, specified bore geometry, sealing-surface roughness and burr removal. Internal cleaning and careful handling support the required delivery condition. A formal particulate cleanliness report is an additional, project-specific requirement.
A customer-defined acceptance requirement
A quality team may require measured contamination results for an initial sample, incoming acceptance or an agreed production scope. Share the specification so the test can address the actual decision your team needs to make.
A defined evaluation question
A component or process review may call for evidence about a particular sample condition. Establish what is being evaluated before choosing the samples, method and reporting basis.
Zhongwei coordinates the project requirements and sample information; SGS performs the agreed third-party testing and issues its report. This arrangement does not mean every manifold is automatically tested or that Zhongwei operates a component-cleanliness laboratory.
Normal drawing-based inspection Internal deburring and cleaningAgree the requirement before sending a sample
A reference to ISO 16232 alone does not define a pass or fail limit for your manifold. The component and system requirements must establish the relevant acceptance criteria. We review those requirements with you and clarify the requested testing scope before arranging the work.
Identify the component and condition
Use the controlled drawing revision and sample identification. State whether the sample is being assessed after cleaning, after surface treatment, as packed for delivery or in another defined condition.
Identify the surfaces and passages
Specify which internal or external areas belong to the test scope. Include any exclusions and explain the condition of plugs, closures or assemblies that may affect access.
Define method, limits and reporting
Provide the applicable specification, method, required reporting basis and acceptance limits. Agree sample quantity and any batch or repeat-testing requirement explicitly.
If the cleanliness requirement is incomplete, identify the open points for the responsible engineering or quality team. We do not assign a universal particle limit based only on the material, pressure rating or outside dimensions of the block.
Preparing a component cleanliness specificationConnect the test sample to the manufacturing project
1. Review and confirm
Connect the requested test to the part revision, customer specification and acceptance purpose. Confirm the scope with the testing provider, including the sample requirements and reporting deliverables.
2. Identify and prepare
Agree which components will represent the defined condition. Record their identity and relevant processing stage, then use the agreed handling and packaging arrangements for submission.
3. Test and report
SGS carries out the agreed test and issues the report. Keep the sample identification and test scope connected to the project records so the result can be interpreted correctly.
The sample’s history matters. Cleaning again, removing closures or changing its condition before submission may change what the test represents. Any such preparation should be agreed and recorded rather than left implicit.
We review the issued report against the requested scope and discuss any gaps with you. If the result does not meet the agreed requirement, review the sample condition, process history and test basis before deciding on corrective action or further testing. A repeat test needs its own defined scope.
Read the report against your acceptance question
A useful report connects the test method and measured results to the right component and condition. Use the following checklist with your quality team; it is a reading guide, not a sample certificate or a claim about a completed test.
| Check | Question to ask | Why it matters |
|---|---|---|
| Part and sample identity | Does the report identify the submitted component or sample set, and can it be connected to the approved revision? | A result is only useful to your project when you know which sample it describes. |
| Condition and tested area | Does the record describe the relevant sample condition and surfaces or passages covered? | Different preparation or coverage can make apparently similar results represent different questions. |
| Method and specification | Is the stated method consistent with the agreed test requirement, including any documented departures? | The laboratory name alone does not establish that the requested examination was performed. |
| Results and units | Are the reported values, units and reference basis the ones required by the project? | Check the basis before comparing values; do not compare unlike measures as if they were equivalent. |
| Acceptance criteria | Are the results evaluated against the actual project limits, where a conformity conclusion was requested? | A measured result and an acceptance decision are different things when no limit has been specified. |
| Scope and report completeness | Are the issue details, stated qualifications and relevant report pages available? | An isolated result screenshot can omit information needed to understand the finding. |
For repeat supply, agree how any sample-based result will be used in the acceptance plan. A report for an earlier sample does not automatically establish the condition of every subsequent part or production batch.
Project documentation and traceabilityKeep the conclusion within the report’s scope
A component cleanliness test addresses the contamination covered by its method and scope. It does not replace verification of the correct material, drawing dimensions, threads, bore geometry or sealing-surface roughness. Those remain part of the manifold’s manufacturing acceptance requirements.
ISO 16232 concerns particulate contamination on components. Its scope is different from characterising operating fluid or assessing films such as oil or grease. Where those are the concern, the required assessment needs to be specified separately.
The issued report describes its identified sample and test condition. It is not a general cleanliness certification for all Zhongwei products, and it does not establish the performance of an assembled hydraulic circuit. Pressure and functional testing are not part of our normal machined-manifold inspection.
Standard reference: ISO 16232:2018 — official scope and summary. Confirm the applicable edition and customer specification for the project.
Questions before arranging verification
Does every manifold include an SGS cleanliness report?
No. Formal third-party cleanliness testing is arranged when the project requires it. Agree the sample scope, method, limits and report before ordering. Normal drawing-based inspection and internal cleaning do not imply a report for every component.
Can we specify only “ISO 16232 compliant”?
That does not fully define component acceptance. The standard does not assign one cleanliness limit to every manifold. Provide the relevant areas, sample condition, method and project limits so the required verification can be agreed.
Does a report for one sample cover the whole order?
The report applies to the identified sample and scope. Any use of sample results for batch acceptance must follow the agreed acceptance plan. Do not assume an earlier sample represents later revisions, processes or batches.
Can a dimensional or material report replace this test?
No. Each report answers its own question. A material certificate or CMM report does not measure residual particulate contamination, and a cleanliness report does not establish the material grade or dimensional conformity.
Can you arrange the test before production release?
Yes, we can discuss third-party testing for an agreed sample or project stage. Confirm the component condition, sample availability, laboratory scope and required timing before making the test a release condition. Timing and cost are confirmed for the actual scope.
Send the specification and the decision it needs to support
Share the manifold drawing revision, material and finish, the relevant surfaces or passages, and the required condition of the sample. Include your cleanliness specification, method, acceptance limits and requested report format where available.
Tell us whether the requirement concerns initial qualification, a defined batch or another project stage, together with the sample quantity and timing. If you have a previous report, identify what you want to compare and whether the component or process has changed.
Prepare a complete project enquiry