Basic introduction of pipe bender
Type B uses the national standard GB7148-81 and the international ISO7150/1-1948 standard salicylic acid photometric method as the basic test means, supplemented by sample colorimetric reaction pretreatment, to achieve rapid and accurate colorimetric determination of samples, with stable,SensitiveReliable and mercury-free.
Pipe bender can be roughly divided into CNC pipe bender, hydraulic pipe bender and so on. Mainly used for electric power construction, public railway construction, boilers, bridges, ships, furniture, decoration and other aspects of pipeline laying and repair, with many functions, reasonable structure, simple operation and other advantages. In addition to the pipe bending function, this machine can also use the cylinder as a hydraulic jack. Compared with the numerical control pipe bending equipment, it has the characteristics of low price and convenient use, and occupies the leading product position in the domestic pipe bending machine market.
Key words: heat exchange equipment
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Type of ammonia nitrogen analyzer
Ammonia nitrogen analyzer according to the different test standards, there are A, B type. Type A is GB7479-87 by Nessler' s reagent colorimetric method. Type B adopts the national standard GB7148-81 and the salicylic acid photometric method specified in the international ISO7150/1-1948 as the basic testing method, supplemented by the sample colorimetric reaction pretreatment, to realize the rapid and accurate colorimetric determination of the sample, which has the advantages of stability, sensitivity, reliability and mercury-free.
Operation steps of ammonia nitrogen analyzer
Pour distilled water or ultra-pure water into a cuvette (about 2/3 height); wipe the water marks and fingerprints on the outer wall with a non-falling paper towel or soft cloth, then put it into the measuring seat of the instrument and cover the shading cover.
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