What certificates can be obtained in the valve testing industry?

It depends on the use, such as what medium is used.

At present, there are two main categories of valve UL certification:

1. It is the certification of contact with drinking water: the test item is the chemical test of metal ions, which is to test the content of metal ions migrated to the prepared reagent solution in the product itself, and the lead content is the most important.

2. It is not in contact with drinking water, such as gas, flammable liquid, fire water, etc.

The test items are: the valve test items of different uses of media are different.

a. Deformation test.

b. Leak test, c. Durability test.

d. Torque test.

e. Day humidity ammonia stress crack test.

f. Hydrostatic pressure test.

g. Pressure safety device test.

h. Volume change and weight loss.

i. Organic coating test on the surface of the valve seat.

j. Hydraulic friction loss test.

k. Mercurous nitrate immersion test.

l. Operational test.

If you are a specialized valve manufacturing enterprise, the general enterprise will let the inspectors verify according to the needs of the enterprise.

Generally, you need to take the exam:

1.Material physical properties inspection certificate.

2.Metallographic inspection certificate.

2.Certificate of Non-Destructive Testing (Ultrasonic. Ray. Magnetic particles. Infiltration) is not necessarily a full test, and general enterprises choose according to their own situation. Metallographic inspection certificates are generally used when the quality of batches of heat-treated workpieces needs to be checked.

If you are a specialized valve manufacturing enterprise, ...Generally, it is necessary to obtain: material physical properties inspection certificate.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.