NIPPLE

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It is made of 100% needle coke through three times of impregnation and four times of roasting. It can meet the needs of various electric arc furnaces and refining furnaces.

Parameters

Standard dimensions for joints and holes
Nominal Electrode Diameter
(mm)(inch)		 Thread Designation Diameter Max.
(mm)		 Length Max.
(mm)		 Depth of socket Min.
(mm)		 Average Weight
(kg)		 Other Designation
IEC Diameter Length
3TPI
(Pich of Thread: 8.467mm)		 300 12 10T3 155.57 220 116 5 N155T3N 6.125 8.66
12T3 177.16 270.9 141.5 8.2 N177T3N 6.975 10.66
350 14 12T3 177.16 270.9 141.5 8.2 N177T3N 6.975 10.66
14T3 215.9 304.8 158.4 14.5 N215T3N 8.5 12
14T3L 215.9 355.6 183.8 17 N215T3L 8.5 14
400 16 14T3 215.9 304.8 158.4 14.5 N215T3N 8.5 12
14T3L 215.9 355.6 183.8 17 N215T3L 8.5 14
16T3 241.3 338.7 175.3 20.5 N241T3N 9.5 13.33
16T3L 241.3 355.6 183.8 21 N241T3L 9.5 14
450 18 16T3 241.3 338.7 175.3 20.5 N241T3N 9.5 13.33
16T3L 241.3 355.6 183.8 21 N241T3L 9.5 14
18T3 273.05 355.6 183.8 28 N273T3N 10.75 14
18T3L 273.05 457.2 234.6 34 N273T3L 10.75 18
500 20 18T3 273.05 355.6 183.8 28 N273T3N 10.75 14
18T3L 273.05 457.2 234.6 34 N273T3L 10.75 18
20T3 298.45 372.5 192.2 36 N298T3N 11.75 14.66
4TPI
(Pich of Thread:6.350mm）		 300 12 12T4 177.8 215.9 114 7.2 N177T4N 7 8.5
350 14 14T4 203.2 254 133 11.2 N203T4N 8 10
400 16 16T4 222.25 304.8 158.4 15.5 N222T4N 8.75 12
16T4L 222.25 355.6 183.8 17.4 N222T4L 8.75 14
18T4 241.3 304.8 158.4 19 N241T4N 9.5 12
18T4L 241.3 355.6 183.8 21 N241T4L 9.5 14
450 18 18T4 241.3 304.8 158.4 19 N241T4N 9.5 12
18T4L 241.3 355.6 183.8 21 N241T4L 9.5 14
20T4L 269.88 457.2 234.6 33.4 N269T4N 10.625 18
500 20 20T4 269.88 355.6 183.8 27.2 N269T4N 10.625 14
20T4L 269.88 457.2 234.6 33.4 N269T4N 10.625 18
550 22 22T4 298.45 355.6 183.8 35 N298T4N 11.75 14
22T4L 298.45 457.2 234.6 42.5 N298T4L 11.75 18
600 24 24T4 317.5 355.6 183.8 40 N317T4N 12.5 14
24T4L 317.5 457.2 234.6 48 N317T4L 12.5 18
650 26 26T4 355.6 457.2 234.6 64 N355T4N 14 18
26T4L 355.6 558.8 285.4 74 N355T4L 14 22
   700       28    28T4 374.65 457.2 234.6 71.5 N374T4N 14.75 18
28T4L 374.65 558.8 285.4 84 N374T4L 14.75 22
Sizes of conical thread and thread socket
Nominal Diameter IEC Code Sizes of Nipple (mm) Sizes of Socket (mm) Thread
mm in D Deviation(-0.5~0) L Deviation(-1~0) D2 Deviation(-5~0)    I    D1 Deviation(0~0.5) H Deviation(0~7) mm
200 8 122T4N 122.24 177.8 80 <7 115.92 94.9 6.35
250 10 152T4N 152.4 190.5 108 146.08 101.3
300 12 177T4N 177.8 215.9 129.2 171.48 114
350 14 203T4N 203.2 254 148.2 196.88 133
400 16 222T4N 222.25 304.8 158.8 215.93 158.4
400 16 222T4L 222.25 355.6 150 215.93 183.8
450 18 241T4N 241.3 304.8 177.9 234.98 158.4
450 18 241T4L 241.3 355.6 169.42 234.98 183.8
500 20 269T4N 269.88 355.6 198 263.56 183.8
500 20 269T4L 269.88 457.2 181.08 263.56 234.6
550 22 298T4N 298.45 355.6 226.58 292.13 183.8
550 22 298T4L 298.45 457.2 209.65 292.13 234.6
600 24 317T4N 317.5 355.6 245.63 311.18 183.8
600 24 317T4L 317.5 457.2 228.7 311.18 234.6
700 28 374T4N 374.65 457.2 285.84 368.33 234.6
700 28 374T4L 374.65 558.8 268.91 368.33 285.4
250 10 155T3N 155.57 220 103.8 <10 147.14 116 8.47
300 12 177T3N 177.16 270.9 116.9 168.73 141.5
350 14 215T3N 215.9 304.8 150 207.47 158.4
400 16 241T3N 241.3 338.7 169.8 232.87 175.3
450 18 273T3N 273.05 355.6 198.7 264.62 183.8
500 20 298T3N 298.45 372.6 221.3 290.02 192.2