GB 20211-2006 pdf download.Titanium powders for fireworks and firecrackers.
GB 20211 specifies the classification, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of titanium powder used in fireworks products.
This standard is applicable to metal titanium powder, sponge titanium powder and titanium hydride powder for fireworks
5.1 appearance
Take 10g sample and lay it on white paper for observation.
5.2 determination of particle size
5.2.1 apparatus
a) Brush;
b) Standard sieve;
c) One pan balance with an accuracy of 0.1g;
d) One vibrating screen machine.
5.2.2 determination steps
5.2.2.1 select the standard sieve group according to the grade (particle size).
5.2.2.2 weigh 50.0g sample and place it in the upper screen, install the screen group, cover the cover, fasten it on the vibrating screen machine, and vibrate for about 5min until it can not be screened
Until powder is added.
5.2.2.3 remove the screen set and weigh the mass.
52.2.4 calculation of screening results:
Calculate the titanium mass (1) of the upper (lower) sieve according to formula (1), and the value is expressed in %.
6 inspection rules
6.1 batching
Each batch of products shall not exceed 50t and shall not be less than 30kg
6.2 sampling
Sampling shall be carried out according to GB / t6678, and no less than 50g samples shall be taken from each packaging unit at random. After the samples are mixed well, the samples shall be taken as follows
The sample was packed in two clean and dry plastic bags and sealed. Label with the name of the manufacturer
Product name, category, grade, grade (particle size), batch number, production date, sampling date and name of sampler. One for inspection and the other for future reference.
6.3 delivery inspection
Each batch of titanium powder shall be inspected by the quality department of the manufacturer according to the provisions of this standard for titanium content, tri acid insoluble matter, particle size and iron content. The finished products shall meet the requirements of this standard and be attached with product certificate.
6.4 type inspection
Under normal circumstances, type inspection shall be conducted at least once a year. Type inspection shall also be carried out when the variety and equipment are updated. The type inspection items include titanium content, insoluble matter in three acids, particle size, copper content, chromium content, manganese content, iron content and aluminum content.