Technical task

SECTION 4. TECHNICAL REQUIREMENTS
Subsection 4.1 Technical, functional and quality characteristics (consumer properties) of the goods:
Geometrically, graphite electrodes and nipples must meet the requirements specified in Table 1.

Table 1

Product indicator name	Value type	Meaning (required)	Meaning (offered)
		d 300 ( UHP)
Electrode diameter and maximum deviation, mm	Nominal	300
	Maximum	307
	Minimum	302
Electrode length and maximum deviation, mm	Nominal	1500
	Maximum	1600
	Minimum	1400
Connection designation for nipples		177T4N
Nipple diameter, mm	Rated Maximum Minimum	177.80
Nipple length, mm	Nominal	215.90
Thread, threads per inch. PC.	PC.	4

According to physical and chemical indicators, graphite electrodes and nipples should

Product indicator name	Values
	d 300 (UHP)
	Nipples	Electrode
Bulk density, g/cm ^3, not less than	1.70	1.65
Electrical resistivity, µOhm*m, not more than	5.5	6.0
Bending strength of the electrode, MPa, not less than	15	9
Thermal expansion coefficient: from 20-100°C, x10^-6, K^-1no more	0.7

meet the requirements specified in table 2.
table 2
Note: indicators not listed in Table 2 are not regulated.


Subsection 4.2 Reliability requirements
In accordance with the regulatory and technical documentation of the manufacturer.
Subsection 4.3. Requirements for components, starting and operating materials
In accordance with the regulatory and technical documentation of the manufacturer.
Subsection 4.4 Labeling requirements
Marking is carried out in accordance with GOST 57613-2017 and / or other international standards.
Subsection 4.5 Packaging requirements
The packaging is produced in accordance with GOST 57613-2017 and/or other international standards. When shipped, the electrodes are formed into transport packages, the packaging is developed by the manufacturer of the products and must ensure the safety of the cargo during transportation.
The electrodes must be supplied complete with nipples (one nipple per electrode). It is allowed to supply separate nipples by agreement with the supplier.


The end of the electrode and the nipple socket, including those with a screwed nipple, protect