National Standard for Tungsten Heater——Detection Rules

Before shipping and sale, tungsten heater and other products need to be passed rigorous testing, so that it can guarantee the quality level of trading market in China.

According to the National Standard SJT 11063-1996 of tungsten heater, the detection rules include the following five details.

1. The product needs to be examined by quality inspection department of the supplier to ensure that products meet national standards, and fill in the relevant quality certificate. The product quality inspection contains the testing of raw materials, product performance, and product life time as well as product destructive performance.
2. The buyer should check and accept the products in accordance with National Standards within three months of the day that they receive the goods. If the results of acceptance test cannot meet national standards, and the products still unqualified again after the testing by the buyer and the supplier, then this batch is unqualified.
3. According to the first article of technical requirements of the National Standard, operators need to pick one sample at random for chemical analysis. If it is failure unqualified, operators should make a double sampling inspection, if it still unqualified, then it is unqualified.
4. The trademark, type and size of each batch of wolfram heater should be the same. Sampling is to randomly select some quantities (samples) from a batch of products for inspection.
5. According to the technical requirements of the National Standard SJT 11063-1996, operators should pick 50 from 500 ~ 1000 wolfram heater at a random to test their life time, size and surface quality, if there are five which are unqualified, operators should repeat sampling, if there are still five unqualified, then it is determined unqualified.

In order to make tungsten market order better, buyers and sellers should be strict compliance with National Standards of production.

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