Composite and metal ductwork from Chuzhou: distinguish the fabrication scope, the selected duct construction and the evidence behind fire-performance claims.
1 published equipment referenceLatest source review 2026-10-11
01 / COMPANY
What this manufacturer offers
Anhui Yeniu HVAC Equipment Co., Ltd. identifies its headquarters at No. 21 Husong Road in the Chahe industrial area of Lai'an County, Chuzhou, Anhui. Its introduction describes development, fabrication, installation and trading, with composite, stainless-steel, welded and galvanized ductwork. The catalogue also contains spiral ducts, fans, dampers, silencers and plenums. Listing these accessories does not establish that every item is manufactured at the headquarters.
The company describes affiliated operations in Nanjing, Anhui and Henan. The reviewed introduction does not establish separate legal entities, precise plant addresses or current production allocation for each. An order should identify the contracting company and actual fabrication site rather than relying on the shared Yeniu name.
The strongest purchasing question is which duct construction, joint and supporting test evidence match the project's actual ventilation or smoke-control duty. The glass-fibre product page publishes useful construction entries, while the report gallery shows documents with narrower sample descriptions. The catalogue's broad fire wording therefore needs a construction-specific review.
Headquarters location
No. 21 Husong Road, Chahe industrial area, Lai'an County, Chuzhou, AnhuiCompany-published headquarters address; no independent site audit performed. Source
Published ductwork scope
Composite, stainless-steel, welded, galvanized and spiral ductsOfficial introduction and catalogue. Accessory listings do not establish in-house manufacture of every accessory. Source
2024 public-record match
Entry 2392 in the second-batch high-tech enterprise filing-publicity listExact Chinese company name on page 80. A historical publicity entry is not a live certificate-status check. Source
Parameters and source limits · Double-sided steel-faced glass-fibre ducts
Swipe the table, or focus it and use arrow keys, to read conditions and sources.
Manufacturer-published information · Double-sided steel-faced glass-fibre ducts
Parameter
Published value
Conditions and evidence
Facing / core
Colour-coated steel / glass fibre
Manufacturer construction description; steel gauge, coating and core density not stated. Source
Core thickness options
20 / 25 / 30 mm
Family options. No thermal or fire result for each thickness established. Source
Connection
C-insert strip
Published connection form; joint dimensions, sealant and pressure/leakage evidence absent. Source
Pressure entry as printed
≥3000 Pa
The page labels this as maximum pressure but uses a lower-bound inequality. Meaning and test basis need clarification; not converted into a safe operating ceiling. Source
Thermal conductivity claim
≤0.032 W/(m·K)
Temperature, density, moisture and test method not supplied; not a complete installed thermal-resistance value. Source
Maximum air-velocity claim
≤25 m/s
Manufacturer claim without geometry or acoustic/leakage test conditions; not a project operating recommendation. Source
Fire-class wording
A1 non-combustible
Manufacturer claim. No matching classification report or assembly fire-resistance duration established in this review. Source
03 / PROJECT REVIEW
A ductwork supplier whose construction choices need a matched specification
Separate the duct constructions before choosing the supplier scope
Yeniu offers several constructions under the same company catalogue. The double-sided steel-faced glass-fibre product is described for air-conditioning supply and return air. Separate columns cover magnesium-based, phenolic and fire-resistant composite ducts, together with metal ducts. A glass-fibre entry cannot be treated as the specification for all those constructions. (Sources 1 and 2.)
Composite ductwork
Specify the exact core, facing, thickness and joint. The reviewed glass-fibre entry gives 20/25/30 mm options and a C-insert connection; those entries do not establish the other composite families.
The introduction lists stainless-steel, welded and galvanized ducts, while the gallery names flange and spiral fabrication. Request the ordered sheet grade, gauge, joint and drawing; none has been inferred from a photograph caption.
Fans, dampers, silencers, plenums and installation activities appear in the site scope. Define which items Yeniu fabricates, buys in and installs, including subcontracting and commissioning responsibility.
Read production publications as capability evidence, not an output guarantee
The company says it uses automated duct lines, laser equipment, angle-iron welding, CNC equipment and magnesium-board engraving. Its workshop index includes named laser cutting, angle-flange, sheet-metal and spiral-duct publications. These support a focused fabrication discussion, but the reviewed pages do not supply machine specifications, current utilization, dimensional tolerances or monthly output. (Sources 1 and 3.)
For a drawing-based order, obtain the approved duct schedule, shop drawings, material specification and inspection records for the actual site. Ask which operations are done there and which are purchased or subcontracted. Company statements about exports or broad application sectors are not shipment evidence for the buyer's selected construction.
A report cover identifies a specimen; it does not publish the result
The gallery contains more than one glass-fibre/composite duct report. They need to be read separately rather than combined into one universal certification. Only the covers were established in the reviewed images; full result pages, test conditions and permitted construction variations remain necessary. (Sources 4 and 5.)
Glass-fibre composite report cover
The published cover identifies a glass-fibre composite duct and Yeniu as the applicant. The reviewed cover does not supply result tables or a duration for integrity and insulation.
The other image names glass-fibre composite ducts with 1000×500 mm and 1000×250 mm openings and a safety-performance type inspection. It names SCFRI/NFTC, but a cover alone does not establish pass criteria, test duration or all 20/25/30 mm constructions.
Check the historical standard against today's project basis
The glass-fibre page cites GB/T 17428-2009. The national standards record now identifies GB/T 17428-2026, published 31 March 2026 and implemented 1 October 2026, as replacing the 2009 edition. It was checked on 11 October 2026. This record establishes the standard-version change, not the duct product's conformity. (Sources 2 and 7.)
Ask the project designer and supplier to identify the applicable specification and whether existing report evidence covers the selected assembly under the required basis. Do not infer that a new standard automatically invalidates every historical report, or that an A1 material claim proves the duct assembly's fire-resistance duration. Request the complete documents and construction details.
The independent public record has a limited meaning
The national high-tech enterprise recognition website's 2024 second-batch Anhui filing-publicity attachment lists 安徽野牛暖通设备有限公司 at entry 2392 on page 80. This matches the Chinese company name, but the attachment is a historical publicity list. It does not supply a current certificate-status check, confirm each affiliated factory or certify a duct product. (Source 6.)
A separate county-hosted 2024 SME PDF link returned 404 during this review and has not been used as proof. The site's AAA headings likewise have not been presented as independent manufacturing-quality certification. Procurement qualification should use current documents with a legal holder, issuing body, scope and status.
Turn the project drawings into a verifiable delivery package
For this supplier, the quotation needs a construction and acceptance package rather than a list of duct names. These are editorial procurement steps, not a claim that Yeniu has already completed them.
Define the duty and construction
Identify ordinary ventilation, smoke control or another specified duty; state duct sizes, material/core/facing, joints, supports, pressure, temperatures and installation conditions through the project drawings.
Match evidence to the proposed assembly
Ask for complete reports and scope covering the proposed core thickness, facing, joint, duct dimensions and support arrangement. Keep material reaction classification separate from assembled-duct fire performance.
Agree the supplied and installed scope
Name fabrication site, accessories, shipment labels, inspection records, installation responsibility and acceptance criteria. Verify the actual contracting entity and document revisions before ordering.
07 / TRANSPARENCY
Sources and review scope
Compiled by HVACDeck Editorial. Page review: 2026-10-11. Publications are attributed below; their statements are not independent measurements by this platform.
Yeniu official company introductionChecked 2026-10-11 · Identity, headquarters, product and affiliated-operation statements read. Site claims are not an independent plant audit.
Workshop index and named operationsChecked 2026-10-11 · Named workshop publications reviewed, including laser-cutting page; no measured output or current equipment capacity established.
Composite duct report publicationChecked 2026-10-11 · Report-cover evidence only; result pages and full construction scope not established.
Insulated composite duct report publicationChecked 2026-10-11 · Image cover visually read: 2023400687, applicant, sample openings and inspection category. Not a complete test conclusion.
