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I-Rod® / Nu-Bolt™ Specs

Delatailed specifications for I-Rod Material and Nu-Bolt assembly

U-bolt dimensions

Download Technical Datasheet

Nominal pipe size Bolt stock Ø” U-Bolt height  thread length  Inside gap  Leg center  I-Rod length  I-ROD hole Ø  I-ROD size  I-ROD height 
in mm in mm in mm in mm in mm in mm in mm in mm in mm in mm
1/2" 15 1/4" 6 3-1/4 83 2-3/8 60 15/16 24 1-3/16 31 2-1/2 64 3/8 10 3/4 19 5/16 8
3/4" 20 3-5/16 85 2-3/8 60 1-1/8 29 1-3/8 35 3 76 3/8 10 3/4 19 5/16 8
1” 25 3-7/16 87 2-3/8 60 1-3/8 35 1-5/8 41 3 76 3/8 10 3/4 19 5/16 8
3/8” 10 3-7/16 87 2-3/8 60 1-3/8 35 1-3/4 44 3 76 1/2 13 1 25 7/16 11
1-1/4" 32 3-3/4 95 2-1/2 64 1-3/4 43 2-1/8 54 3-1/2 89 1/2 13 1 25 7/16 11
1-1/2” 40 4 102 2-1/2 64 2 51 2-3/8 60 4 102 1/2 13 1 25 7/16 11
2” 50 4.5 114 2-1/2 64 2-7/16 62 2-13/16 71 4-1/2 114 1/2 13 1 25 7/16 11
2-1/2" 65 1/2” 13 5-1/4 134 3 76 2-15/16 75 3-7/16 87 5 127 5/8 16 1 25 7/16 11
3” 80 5-13/16 148 3 76 3-9/16 90 4-1/16 103 6 152 5/8 16 1 25 7/16 11

4"

 100 6-13/16 173 3 76 4-9/16 116 5-1/16 129 7 178 5/8 16 1 25 7/16 11
5" 120 7-13/16 198 3 76 5-5/8 143 6-1/8 156 8 203 5/8 16 1 25 7/16 11
6" 150 5/8” 16 9-1/2 241 3-3/4 95 6-3/4 171 7-3/8 187 9 229 11/16 18 1 25 7/16 11
8" 200 11-1/2 292 3-3/4 95 8-3/4 222 9-3/8 238 11 279 11/16 18 1 25 7/16 11
10" 250 3/4” 19 13-13/16 351 4 102 10-7/8 279 11-5/8 295 13-1/2 343 7/8 22 1-1/2 38 11/16 18
12" 300 7/8” 22 16-1/16 408 4-1/4 108 12-7/8 327 13-3/4 349 16 406 1 25 1-1/2 38 11/16 18
14" 350 17-5/16 440 4-1/4 108 14-1/8 359 15 381 17 432 1 25 1-1/2 38 11/16 18
16" 400 19-5/16 490 4-1/4 108 16-1/8 410 17 432 19 483 1 25 1-1/2 38 11/16 18
18" 450 1” 25 21-11/16 551 4-3/4 121 18-1/8 461 19-1/8 486 21-1/2 546 1-1/8 29 1-1/2 38 11/16 18
20" 500 23-11/16 602 4-3/4 121 20-1/8 511 21-1/8 537 23-1/2 597 1-1/8 29 1-1/2 38 11/16 18
24" 600 27-11/16 703 4-3/4 121 24-1/8 613 25-1/8 638 27-1/2 699 1-1/8 29 1-1/2 38 11/16 18
28" 700 31-11/16 805 4-3/4 121 28-1/8 715 29-1/8 740 31-1/2 800 1-1/8 29 1-1/2 38 11/16 18
30" 750 33-11/16 856 4-3/4 121 30-1/8 765 31-1/8 791 33.5 851 1-1/8 29 1-1/2 38 11/16 18
36" 900 39-11/16 1008 4-3/4 121 36-1/8 918 37-1/8 943 39.5 1003 1-1/8 29 1-1/2 38 11/16 18

I-Rod specifications

Download Technical Datasheet

Material I-Rod (White) I-Rod HT (Amber) PEEK (Tan)
Property value ASTM Test Metric Imperial Metric Imperial Metric Imperial
Density, 73º F (23º C) D792 1.41 g/cm3 0.0509 lb/in3 1.28 g/cc 0.0462 lb/in3 1.31 g/cm3 0.047 lb/in3
Tensile strength, 73º F  (23º C) D638 64.8 MPa 9,400 psi 114 MPa 16,500 psi 110 MPa 16 ksi
Tensile modulus of elasticity,
                     73º F   (23ºC)		 D638 2.62 GPa 380 ksi 3.45 GPa 500 ksi 3.44 GPa 500 ksi
Elongation (at break),
                     73º F  (23ºC)		 D638 30-60% 30-60% 30-60% 30-60% 20% 20%
Flexural modulus of elasticity,
                     73º F  (23ºC)		 D790 2.76 GPa 400 ksi 3.45 GPa 500 ksi 6.89 GPa 1000 ksi
Flexural strength, 73º F    (23ºC) D790 82.7 MPa 13 ksi 138 MPa 20 ksi 172 MPa 25 ksi
Compressive strength, 10% def,
                     73º F    (23ºC)		 D695 103 MPa 15 ksi 152 MPa 22 ksi 137 MPa 20 ksi
Coefficient of friction (dry vs steel) N/A QTM 55007 0.25 0.25 0.42 0.42 0.40 0.40
IZOD Impact (notched), 73º F  (23ºC) D256 .534 J/cm 1 ft-lb/in of notch .267 J/cm 0.5 ft-lb/in of notch .534 J/cm 1.0 ft-lb/in of notch
Hardness, Rockwell,
                     73º F  (23ºC) M/R		 D785 88/120 88/120 112/125 112/125 100/126 M103
Maximum service temperature (Long Term) 83 ºC 181ºF 171º C 340º F 249 ºC 480 ºF
Deformation under load D621 1.0% 1.0% - - - -
Melting point D3418 168º C 329º F 210º C 410º F 340 º C 644 º F
Coefficient of linear expansion E831 97.2 µm/m/ºC 54 µin/in/ºF 55.8 µm/m/ºC 31 µin/in/ºF - -
Heat deflection temperature,
                     264 psi		 D648 104 ºC 220ºF 204 ºC 400ºF 160 ºC 320 ºF
Flammability rating VL94 HB HB V-0 V-0 V--0 V--0
Dielectric strength, short term D149 16.5 kV/mm 420 V/mil 32.7 kV/mm 830 V/mil 18.9  kV/mm 480 V/mil-

Polyolefin specifications

Property Value ASTM Test Metric Imperial
Max continuous operating temp   110 °C 230 °F
Min continuous operating temp   -55 °C -67 °F
Tensile strength   D412 ISO 37 14.47 MPa 2,100 psi
Elongation D412 ISO 37 550% 550%
Longitudinal change   D2671 +1%, -10% +1%, -10%
Specific gravity   D792 ISO/R1183 1.1 1.1
Elongation after heat aging (168 hrs @ 150º C) D2671 ISO 37 500% 500%
Heat shock (4 hrs @ 225º C)   D2671 No cracking /flowing No cracking /flowing
Low-temperature flexibility (4 hrs @ -55º C)   D2671 No cracking No cracking
Hardness   D2240 50D 50D
Dielectric strength D149 IEC 243 500 KV/mm 12,700 volts/mil
Dielectric voltage withstand (2500V, 6-Hz, 1 min) UL 486D No breakdown No breakdown
Volume resistivity D257 1016 Ohm/cm 1016 Ohm/cm
Fluid resistance MIL-DTL 23053/5, ISO 1817 ISO 37 Good to excellent Good to excellent
Copper corrosion D2671 No corrosion No corrosion
Water absorption D570 0.1% 0.1%
Fungus resistance G21 No growth No growth
Adhesive softening point E28 92 +/- 5 °C 197 +/- 10 ºF
Adhesive peel strength (300mm/min @ 23º C) D1000 - -
-to steel, alum, P.E. D1000 61 N/cm   35 pli
-to PVC D1000 35 N/cm 20 pli
Adhesive lap shear (1 in / min at 23º C) D1002 mod 0.86 MPa  125 psi
Adhesive blocking (30º C) D1146 No blocking No blocking
Water penetration STM 706 No penetration after 286 hrs minimum of cont. immersion

U-Bolt weights and loads

Nominal pipe size Bolt stock Ø” Max recommended load @ 650ºF Max recommended load @ 750ºF Approximate weight with nuts (does not include I-Rod)
in mm in mm lbs. kg lbs. kg lbs. kg
1/2" 15 1/4" 6 485 220 435 195 0.11 0.05
3/4" 20 0.12 0.06
1” 25 0.06
3/8” 10 1220 550 1090 495 0.28 0.13
1-1/4" 32 0.30 0.14
1-1/2” 40 0.33 0,15
2” 50 0.73 0.33
2-1/2" 65 1/2” 13 2260 1025 2020 915 0.78 0.35
3” 80 0.84 0.38

4"

 100 0.90 0.41
5" 120 1.00 0.45
6" 150 5/8” 16 3620 1645 3230 1465 2.00 0.90
8" 200 2.30 1.04
10" 250 3/4” 19 5420 2460 4830 2195 4.90 2.23
12" 300 7/8” 22 7540 3425 673 3050 7.70 3.50
14" 350 8.30 3.77
16" 400 9.20 4.18
18" 450 1” 25 9920 4500 8850 4020 13.5 6.14
20" 500 14.6 6.63
24" 600 16.9 7.68
28" 700 18.0 8.18
30" 750 19.1 8.68
36" 900 23.2 10.54

U-bolt coatings

Non-gripping Nu-Bolts

NON-GRIPPING NU-BOLTS

Non-gripping Nu-Bolts secure the pipe to the support while leaving enough clearance to allow for movement due to thermal expansion. In this configuration, one nut on each side is placed above the I-Rod strip to prevent the U-bolt from contacting the top of the pipe too tightly. The nuts can be adjusted to let the pipe move lengthwise without damaging the coating. Flat areas on each end of the I-Rod strip allow the top nut to remain firmly tightened once the desired clearance has been set.

 Download Gripping vs Non-Gripping Guide

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Gripping vs Non-Gripping Nu-Bolts

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