Thermal oil-400 (biphenyl-diphenyl ether mixture) (two)

4 Test method

4.

Carry out according to the Webster's balance method in Article 2.

Take the arithmetic average of the two parallel determination results as the determination result, and the difference between the two parallel determination results shall not exceed 0.

4.

According to GB/T7533 regulations

Take the arithmetic mean of the two parallel determination results as the determination result, the difference between the two parallel determination results shall not exceed 0.

4.

Weigh about 2g sample, accurate to 0.

Take the arithmetic average of the two parallel determination results as the determination result, and the difference between the two parallel determination results shall not exceed 0.

4.

4.

a.

b.

c.

4.

According to GB/T7534 regulations

4.
5 Determination of viscosity

According to GB265 regulations
.

5 Inspection rules

5.
1 Heat transfer oil-400 (biphenyl-diphenyl ether mixture) should be inspected by the quality supervision department of the manufacturer.
The manufacturer should ensure that the technical indicators of all products manufactured meet the requirements of this standard and are accompanied by a quality certificate.
Including: product name, product grade, product batch number, net weight, date of manufacture and serial number of this standard
.

5.
2 Sampling shall be carried out in accordance with Article 6.
6 of GB/T6678 and Article 2.
1.
3 of GB/T6680
.
The total volume of the sampled product shall not be less than 1000mL.
After being thoroughly mixed, it shall be divided into two clean and dry brown ground-mouth bottles, labelled and marked with the product name, batch number, sampling date and the name of the sampler.
One bottle For inspection, another bottle is kept for 2 months for future reference
.

5.
3 The inspection result is judged according to the rounding value comparison method in GB1250.
If one of the indicators in the inspection result does not meet the requirements of this standard, a sample from twice the amount of packaging should be re-inspected, even if there is only one indicator.
If it does not meet the requirements of this standard, the entire batch of products will be considered unqualified
.

5.
4 The user has the right to check and accept the quality of the products received in accordance with the technical requirements and test methods specified in this standard
.
When there is an objection between the supplier and the buyer on the quality of the product, the two parties shall negotiate and resolve it
.

5.
5 One batch of barreled products is packaged once, and each tank is a batch for tank trucks
.

6 Marking, packaging, transportation and storage

6.
1 Thermal oil-400 (biphenyl-diphenyl ether mixture) product packaging containers should be coated with a firm logo, which includes the name of the manufacturer, product name, batch number, product net weight, trademark, production date and the standard number
.

6.
2 Thermal oil-400 (biphenyl-diphenyl ether mixture) should be packed in tightly sealed, clean and dry iron drums, with a net weight of 200kg per drum
.

6.
3 Thermal oil-400 (biphenyl-diphenyl ether mixture) should be stored indoors in a ventilated and dry place, and prevent violent impact during transportation to prevent leakage
.

Related links: Heat transfer oil-400 (biphenyl-diphenyl ether mixture) (1)