How to fill in the hot dip galvanized product quality certificate

1. The hot-dip galvanized product quality certificate should be filled in by the quality inspection department of the hot-dip galvanizing processing enterprise according to the results of the batch of product testing.

2. The content to be filled in should be tested and filled in according to the relevant items specified in the relevant national standards according to the different processed products.

3. For example, steel parts implement GB T13912-2002 national standard; The tower parts implement the GB T2694-81 national standard, the highway facilities implement the GB T18226-2000 national standard, and the hot galvanized steel pipe implements the 3091-2008 national standard.

The inspection and laboratory of hot-dip galvanizing enterprises must be certified by the Technical Supervision Bureau at or above the municipal level, and the testing and laboratory personnel must be certified to work, and the report issued by the outside world is valid.

Hot-dip galvanizing, also known as hot-dip galvanizing and hot-dip galvanizing, is to immerse the derusted steel parts in about 500 molten zinc liquid, so that the surface of the steel components is attached to the zinc layer, so as to play the purpose of anti-corrosion. It is an effective way of metal anti-corrosion, mainly used in metal structure facilities in various industries. Hot-dip galvanizing is developed from the older hot-dip method, which has a history of more than 180 years since 1836 when France applied hot-dip galvanizing to industry.

However, the hot-dip galvanizing industry has only developed on a large scale in recent decades with the rapid development of cold-rolled strip. Hot-dip galvanizing process: finished product pickling - water washing - adding plating solution - drying - hanging plating - cooling - chemical - cleaning - grinding - hot-dip galvanizing is completed.

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The galvanized product quality certificate should be filled in truthfully by the manufacturer of galvanized products according to the inspection data of the batch of galvanized products, which covers more content and items, usually the manufacturer or dealer should provide the original or a copy of the red seal with the goods. It is not available from other manufacturers unless the final conclusion is reached by the inspection department of the quality inspection department. FYI.

Medium zinc hot-dip plating.

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The appearance and galvanizing thickness must be checked, if the thickness of the coating on the metal can be measured with Guangzhou Dongru coating thickness gauge, there is a DR360 accuracy can also be.

The certificate of conformity is the product certificate, and the quality certificate is the quality certification, also called the quality assurance certificate.

1. The subject of issuance is different.

The product certificate refers to the certificate, label or seal attached to the product or product packaging by the producer to show that the product has passed the quality inspection. This is an express guarantee made by the producer for the quality of its products, and it is also a product identification obligation undertaken by the producer under the law.

The quality certificate, that is, the quality certificate, also known as the quality assurance certificate, is a written certificate obtained through the certification of the product quality certification body or the quality system certification body.

2. The product range is different.

The product quality certificate not only indicates the model, specification, batch number and inspectors of the product, but also generally indicates the specifications and performance parameters of the raw materials used, and provides information such as test reports or test reports, test or test results, standards used in tests or tests, sampling methods and other information on the main performance indicators.

3. Different storage.

The quality certificate is to prove that the product quality is okay, and there is no need to put it together with the factory product. The product certificate is given to the end customer along with the product.

In addition to the product model, name, specification, production unit and address, the product certificate should also have the following contents.

1) Implement the product standard number.

2) Inspection items and their results or inspection conclusions. Products delivered in batches should also have: batch, batch number and part number of the sampled inspected piece, etc.

3) The inspection date, the date of delivery, and the signature or seal of the inspector (can be indicated by the inspector's code).

What is a warranty?

"Quality Assurance Certificate" is the oral common name in the ** link, sometimes called "material list", the Chinese translation is "product quality certificate", the English name of the specification is "inspection cetificate" (ISO requirements), and the literal translation is "product inspection certificate".

The point is to tell the user that I did the test as required, and the test results are shown below.

Tips: Some domestic steel mills translate the English of the warranty certificate into "quality certificate" according to Chinese, which may lead to disputes when the product is exported.

What kind of disputes will it cause? Taking the European standard as an example, it may lead to non-compliance with the requirements of the European standard EN 10204.

according to en 10204

The inspection document complies with the requirements of the provisions of EN 10204. The inspection document (commonly known as the warranty certificate) is not printed casually, and it also has its implementation requirements.

The purpose of EN 10204 is to declare that the inspection results are in accordance with the requirements of the order. If a steel mill is ISO 9001 certified and the issuing body is a certification body in the European Union, the mill can issue a material inspection document (warranty) to its customers.

In fact, it is not only Europe that has this requirement, but also ISO: ISO 10474:2013. Of course, our national standard also has a similar document: GB T 18253-2018 "Types of Inspection Documents for Steel and Steel Products".

Different steel mills and different varieties may have different warranty formats, and the old steel trade may not have seen all of them. Changzhou Precision Steel Pipe Blog Network has collected many quality assurance certificates of different steel mills, have you seen them?

Foreign steel mill JFE [Japan] warranty certificate.

Nissin Steel [Japan] warranty.

Nippon Steel [Japan] warranty.

Hyundai Steel [Korea] warranty.

POSCO [Korea] Warranty.

Uttam Galva [India] warranty.

Warranty of a steel mill in Russia.

European Label Grades. ArcelorMittal warranty.

Domestic steel mills. Baosteel Warranty Certificate.

Masteel Warranty.

Valin ArcelorMittal Warranty.

Rizhao (cold formed rech) warranty.

Shagang warranty.

Handan steel warranty.

Guangzhou JFE warranty.

Nanjing Iron & Steel Quality Guarantee.

This steel plate material warranty.

Bengang POSCO Warranty.

Shougang Jingtang warranty.

Shougang Group Warranty.

WISCO WISCO Warranty.

Yangang warranty.

Dalian Tower High Quality Assurance Certificate.

Normally, it is a different way of saying the same concept, generally saying that the warranty book, this is also a common saying, and some are also said to be "quality assurance certificates", which are usually the same, that is, to provide some basic information for reference.

The weight of metal products scrapped due to corrosion is about one-third of the annual metal production. Therefore, in order to save steel and ensure the normal operation of production, the problem of anti-corrosion in production must be solved accordingly. Hot-dip galvanizing or zinc alloy is the most widely used steel surface treatment method in the world today, with the best performance ratio.

We have solved the practical problem of anti-corrosion caused by the perennial corrosion of a large number of ships in water, and on the basis of the work of our predecessors, we have done the following work: First, the refining method of the master alloy and its influencing factors. Combined with the phase diagrams between Zn-Al, Zn-Ni and Zn-Re, the optimal temperature, time and operation process required for refining each master alloy were studied from the aspects of energy saving and yield improvement, and the results were satisfactory.

2. The thickness of hot-dip galvanized coating is a basic and important index for testing hot-dip galvanized products, and the influence of hot-dip galvanized coating thickness and time and temperature is first found in this paper. Then, by using the metal synergistic effect, a series of ZN-AL-NI, ZN-AL-re, ZN-AL-NI-RE multi-alloy coatings were prepared, and through the detailed comparison of the gloss, roughness, thickness of the coating, the adhesion of the coating and the corrosion resistance of the coating on the surface of each coating, a more ideal metal formula suitable for solving industrial anti-corrosion was obtained. 3. In this paper, spectrophotometry is used. Take a look at the basics.