Jingxin · drawing-led duct fabrication in Mianyang

Choose the fabrication route by geometry and connection

The profile lists several duct production lines, including “fifth-line” and “sixth-line” wording, and dozens of dedicated machines. Those statements do not establish the diameter/gauge envelope of a spiral machine or the capability of every listed material. Treat the spiral, common-plate flange and angle-steel flange families as separate fabrication packages.

Provide a coordinated duct drawing and numbered schedule for straights, elbows, reducers, branches and transitions. Identify whether dimensions refer to clear internal air space or external fabricated dimensions, particularly where insulation is included. Ask who develops shop drawings and resolves clashes with structure, cable trays or other services before fabrication begins.

Specify material instead of buying by appearance

The spiral description proposes galvanised duct for ordinary ventilation and stainless for corrosive or particularly damp locations. It provides no steel grade, zinc-coating specification, stainless grade or chemical exposure limits. The appearance of a bright metallic tube cannot settle those requirements. Ask for the sheet specification and traceable material documents tied to the delivered batch.

Choose material against the actual air stream, humidity, contaminants and cleaning method with the responsible designer. For a cold-air system, decide insulation thickness, conductivity, vapour barrier and support details separately. A supplier’s ability to fabricate stainless duct is not proof that an unspecified stainless grade is suitable for every corrosive process.

Keep smoke and kitchen applications separate from general ventilation

The site has a separate smoke-exhaust category and the spiral text also mentions kitchen fume exhaust. Neither establishes a certified fire-resistance period, smoke temperature/time rating or grease-duct approval for the reviewed spiral assembly. General ventilation benefits such as “good sealing” and “low noise” have no measured leakage class or acoustic data on that page.

For smoke, fire or grease service, have the responsible designer specify the complete approved construction and installation requirements. Obtain evidence covering the actual material, seams, joints, supports, insulation and service conditions. Do not infer a compliant system from a category title or apply a general supplier article as universal code advice.

Read capacity and case evidence with their limits

The daily output statement uses square metres without defining whether it is developed sheet area, finished duct area, shifts, gauge or fitting mix. A project with many transitions and branches cannot be scheduled from that headline alone. Ask for a production plan based on the approved schedule, material procurement, bottleneck operations and installation sequence.

The official gallery lists Mianyang Central Hospital, the public-security bureau, Red Star Macalline and a partly masked school name with testimonial-style text. These are supplier-hosted references. The reviewed pages do not supply client-issued acceptance documents, bill-of-quantities or exact delivered duties, so they are not represented here as independently verified endorsements.

Use the licence image as identity evidence, not product approval

The displayed licence can support the named processing factory’s historical identity and business scope. It cannot certify pressure strength, leakage, fire resistance or stainless material quality. No current limited-company registration, accredited duct test or model certificate was authenticated in this review. The distinction remains explicit instead of being filled with a generic certification badge.

Require the document relevant to the intended transaction: current company licence for contracting, batch material evidence for sheet selection, and the agreed inspection/test record for the assembly. Verify any certificate’s holder, product scope, report number and validity against the actual order.

Hand over a duct system that can be installed and checked

The official contact email remains in the private CRM field. No email has been sent. The reviewed source establishes no universal price, MOQ, warranty or delivery commitment; define these for the approved package.

1. Approve the order

   Confirm the contracting entity, drawings, material/gauge, connections, reinforcement and installation boundary.

2. Inspect the fabrication

   Check labelled dimensions, seams/flanges, fitting fit-up, finish and material traceability; agree pressure/leakage checks with acceptance criteria.

3. Release by installation zone

   Pack and label by drawing/zone, protect edges and openings, verify transport/lifting access and record site joints, supports and final inspection.