Document review
Public records and order documents should be reviewed separately.
Yigao's official Chinese website has a two-page Qualifications and Honors index that currently displays 22 certificate-image records. The public labels include a business license, a high-tech enterprise image and multiple patent-certificate titles. This English page records those public company references without assuming that every document is current, owned by the same legal entity, translated correctly or applicable to every custom machine.
Selected patent-certificate labels visible on the Chinese records page
The public labels include English-translated subjects such as an energy-saving mold temperature machine, an oil-circulation temperature-control machine for a molding press, a circulating heating device for a mold temperature machine, an automatic-cleaning mold temperature machine, a cooling-protection device, a mold temperature machine heating tube and a vibration-protection mold temperature machine. These are public labels only, not an independent patent-status verification.
Before citing a patent in procurement or marketing material, verify the patent number, exact Chinese title, applicant or owner, inventors, filing and grant dates, current legal status and technical relevance to the product being discussed.
Document fields buyers should request
Company document
Legal entity, unified social credit code or registration number, registered address, issue authority and current status.
Certificate or type test
Document number, standard, issuing or testing body, issue date, expiry date, model scope and configuration limitations.
Patent record
Patent number, title, owner, inventors, application and grant dates, legal status and relevant product feature.
Inspection record
Order or serial number, drawing revision, test item, method, instrument, measured result, acceptance criterion, date and sign-off.
Model-specific inspection and testing to agree before order
The correct test package depends on the heater type. Buyers and Yigao should agree the inspection and test plan before production. Typical review items may include:
- Approved drawing, nameplate data and bill-of-material or key-component verification.
- Electrical protective devices, grounding, insulation resistance, phase sequence and wiring checks.
- Sensor, alarm, emergency stop, low-flow, low-level, over-temperature and other applicable interlock tests.
- Leak, pressure or circulation checks where the selected equipment and medium require them.
- Functional operation under an agreed safe test method, with operating assumptions and measured results recorded.
- Appearance, dimensions, connection direction, accessories, document package and export packing inspection.
Document scope
This site does not present universal CE or ISO coverage, universal patent coverage, approval for every country or the same test package for every product. It also does not convert an image title into a guarantee of validity. Exact document coverage must be confirmed for the selected model and order.
Buyer FAQ
Certificates and testing FAQ
Does every Yigao heater have CE or ISO certification?
No universal CE or ISO claim is made on this website. Document availability and applicability depend on the selected model, components, destination market and order. Buyers should state the required standard and request the exact applicable document before ordering.
Does the Chinese honors page prove that every listed patent is currently valid?
No. The official Chinese honors page publicly displays certificate-image titles, but an English buyer should still verify the patent number, applicant or owner, grant date, current legal status and relevance to the selected product.
Which test records should be requested with an industrial heater?
The required records depend on the equipment. Typical items to agree in writing include drawing and component verification, electrical protection checks, grounding, insulation resistance, phase sequence, alarm and interlock tests, leak or pressure tests when applicable, functional operation and packing inspection.
Can a company-level qualification be used for every custom machine?
Not automatically. A company qualification and a product-specific certificate or test report serve different purposes. Ask Yigao to identify the document owner, scope, model, standard, issue date and destination-market applicability.
How should certificate requirements be written into an order?
List each required standard or document in the inquiry and quotation, then record the applicable model, issuing or testing body, acceptance criteria, delivery stage and whether an original, copy or third-party verification is required.