ISO 17683:2014 pdf free

ISO 17683:2014 pdf free.Ships and marine technology一Ceramic weld backing for marine use
The moisture absorption rate shall be measured as follows.
a) Randomly select three samples among the ceramic weld backing blocks. The dust on their surface shall be blown clear. Lay the samples on a tray, then put into an oven of constant temperature and humidity together.
b) Switch on the power of the oven and adjust the humidity to (95±3) % and the temperature to (25±2)℃.
c) Keep the samples and tray in the oven for 4 h, then take the samples out of the oven, weigh all samples, and record the weights as m2 separately with an accuracy of 0,001 g.
d) Lay the samples on the tray, then place into the oven of constant temperature. Switch on the power of the oven, adjust the temperature to 200℃, and keep for 2 h.
e) Take the samples out of the oven and keep it in the dryer until it cools down to the room temperature.Weigh all samples by an analytical balance, and record the weights as m1 separately with an accuracy of 0,001 g.
f) The moisture absorption rate for each sample shall be calculated in accordance with Formula (1).
If the samples meet all test requirements, the batch of ceramic weld backing will be deemed to have passed the type test. However, if the samples fail to meet any of the test requirements, additional double of samples shall be tested. If the additional samples pass all test requirements, the batch of ceramic weld backing will be deemed to have passed the type test. Otherwise, the batch of ceramic weld backing will be deemed to have failed the type test.
If the batch of ceramic weld backing meets the requirements specified in 8.1, the batch of the products will be deemed to have passed the acceptance test. However, if some samples fail to meet any of the test requirements, additional double of samples can be allowed only one time for re-test. If the additional samples pass the test requirements in 8.1, the batch of the products will be deemed to have passed the acceptance test. Otherwise, the batch of the products will be deemed to have failed the acceptance test.ISO 17683 pdf download.