Material Certificate

How important of Material Certificate?

Yesterday, I have received one information from some one I did not know. He asked me that their operation met melting problems on their long screw pin. He want us to suggest some material who can fulfill the resistance temperature ＞500℃.

That is not first time to happen. Each year, we will receive several times from different small power plant operator questions like this. Most times, the problem or the question is happened due to the material.

Material Certificate is one of the important document that the user asked. But no body can confirm that the material certificate is used on this order for this good, and if the user did not do inspection.

Take an example,

We have supplied many times Grate Bars for stoker boiler in Kalimantan. There are several small power plants there. Only one of the power plant will do inspection after the material arrival at site to check whether it fulfill the specification compared to the material certificate.

Now, the question is if no condition to do inspection by the user, how the user know whether the material is qualified or not. One basic method is weight comparation. If the user check the original drawing from manufacture, he can find the single weight. Compared to same material, the weight will be same more or less. If the material changed, better the user can calculate by himself or by manufacture, how about the single weight. It is one easy and fast way to check.

The material certificate should be issued by the actual manufacture, the fabricator or the factory. It will not be issued by one trading company. The raw material certificate and mill certificate should be from the material manufacture, not the product manufacture.

If as user, you can know the difference clear, I think everything will go well.