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Send the current drawing number and revision, a readable dimensioned PDF and the available CAD file. Include units, material specification, connection details, quantity and the question you want reviewed. A photograph or sketch can introduce the issue, but dimensions that control manufacture need confirmation. For technical help with a mating interface, include the relevant details of both components. Identify which file governs if the model and drawing differ, and remove superseded files from the review package.

Send the geometry, service requirements and applicable project specification for review. Non-standard features require a defined design and acceptance basis; they are not automatically covered by the rating or conformity of a standard product. Identify who is responsible for design approval and which dimensions are fixed by existing equipment. The team can review the proposed manufacturing scope and return questions or alternatives. Feasibility, price and timing are confirmed for the actual item rather than assumed from a similar photograph.

Provide the complete material designation and applicable specification, together with the product type and relevant service conditions. A broad label such as stainless steel or carbon steel is not a complete requirement. State any additional testing, heat-treatment or documentation requirements from the project specification. Technical help can identify information needed for review, while the responsible project engineer approves material suitability. Any proposed substitution should be documented and accepted before the purchasing description or drawing is changed.

Reference: ASTM A403/A403M for wrought austenitic stainless steel piping fittings.

Yes, you can request a sample or first-piece review. Availability, cost, quantity, supporting documents and timing must be confirmed for the particular item. Explain what you need to assess: dimensions, finish, material evidence or an assembled interface. Agree the acceptance criteria before the sample is prepared and say whether production must wait for approval. An illustrative sample is different from a production first piece, so identify which you require. Keep the accepted record with the released drawing.

Use the applicable standard and the functional requirements of the assembly. Mark critical dimensions, datums and inspection methods on the drawing, and identify any requirement tighter than the general tolerance. The achievable tolerance depends on the part geometry, material, process and measuring method. JINYI will review the actual requirement; this page does not promise one tolerance for every product. Avoid placing a tight value on every dimension without explaining which interfaces need it, because that can change the production and inspection scope.

Include the connection standard, nominal size, facing, drilling, bore and any relevant installation dimensions. Show the datum and orientation used to measure the interface. Nominal size alone does not prove that two components will fit together. For existing equipment, provide its drawing or verified measurements where available. The project engineer should resolve alignment and assembly requirements through the approved procedure. Technical help can clarify the component information needed for review, but a photograph cannot establish every hidden dimension or acceptance limit.

That depends on the proposed geometry, material, manufacturing route and quantity. Send the drawing and expected order quantity so the team can review tooling or fixture requirements. Some features may be produced by an additional operation; others may require a different route. Request any tooling cost and approval requirement separately in the quotation. For repeat orders, clarify the assumptions about tool availability, maintenance and design revisions. There is no fixed quantity threshold that applies to every custom flange or fitting.

The quotation or order acknowledgement should state the agreed starting milestone and programme assumptions. Drawing approval, commercial confirmation, material availability and inspection requirements can all affect readiness to proceed. Ask whether the quoted period ends at factory readiness, dispatch or destination arrival. If you need staged deliveries, identify the priority line items and documents. A later design change can affect the programme, so confirm the revised scope and dates together. Transport timing should be reviewed for the actual route and delivery terms.

List the documents required by your project specification at enquiry stage. Depending on the agreed scope, these may include material records, dimensional reports, additional examination records, a packing list or other order documents. Availability and format are confirmed for the actual item. Identify the required certificate type and any third-party involvement precisely. The relevant records should connect to the supplied line items through the agreed identification system. Use Downloads to request available reference documents and Technical Help to clarify an order-specific requirement.

You can request customer or third-party witnessing as part of the enquiry. Provide your inspection and test plan, proposed hold points, notice period and required records. JINYI will review the arrangement and confirm access, timing and responsibilities before it becomes part of the order scope. Any remote review should be agreed by the responsible parties. Add these requirements before production is scheduled so inspection does not depend on an unplanned visit. Keep the accepted plan and subsequent changes under revision control.