GroundGuardian® Bypass Conductors

ALLTEC’s patented GroundGuardian® Bypass Conductors for External Floating Roof Tanks (EFRTs) provide a permanent and low resistance-low impedance connection between the floating roof and the tank shell wall.

GroundGuardian® Bypass Conductors are engineered to meet the American Petroleum Institute (API) Recommended Practice 545 Sect. 4.2.1.2.2, which states: “Each conductor, including connections shall have a maximum end-to-end resistance of 0.03 ohms (Ω),” and Sect. 4.2.1.2.1, “Bypass Conductors are used for conduction of the intermediate and long duration component of a lightning strike.”

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Oil & Gas Application

Lightning is a constant danger to oil and gas facilities. Bypass conductors provide a safe, low resistance, and low impedance connection between the floating roof and the tank shell wall.

Features & Benefits

  • Provides a permanent and exceptionally low-resistance & low-impedance bond

  • The 50 mm2 GroundGuardian® Bypass Conductor is a tinned low-resistance copper core safeguarded with grade 316L stainless steel for corrosion resistance, strength and durability

  • Stainless steel terminations provide electrical contact and mechanical retention

  • Meets NFPA 780 Primary Bond requirements for direct strike lightning protection

  • Easily installed on new or existing steel or aluminum tanks
  • Two (2) year replacement warranty
  • Custom lengths and terminations available

Dimensions

GroundGuardian® Bypass Conductor
Cross Sectional Area 50 mm2
Structure (Inside) 48 / 30 / 0.15 tinned copper
Structure (Outside) 48 x 30 x 10.15 316L Stainless steel
Length See chart/table below
Cable Tensile Breaking Force ≥ 21000 N (Pulling speed: 100mm/minute)
Single Conductor Element Diameter 0.149 – 0.154 mm
ATEX Certification CE (Ex) II 2 G c T4
Environmental Testing CEI/IEC 68-2-52 Part 2, Severity 2 & per ASTM BB117-11
Passed Operational Testing
Salt Spray/Temperature & Humidity Test
EN ISO 6988-1985(E)
Passed Operational Testing
Humid Sulphurous Atmosphere Treatment Test
Lightning Current Test Certification 200 kA impulse current with 10/350 waveform

Quantity of Required GroundGuardian® – Bypass Conductors

Multiple GroundGuardian® – Bypass Conductors on each tank will provide low-resistance and low impedance pathways to safely route lightning currents. There is a minimum of two (2) GroundGuardian® – Bypass Conductors per tank, with spacing averaging no more than every 30 m, in accordance with API 545 4.2.1.2.2.

Quantity Tank Diameter (m) Quantity Tank Diameter (m) Quantity Tank Diameter (m) Quantity Tank Diameter (m)
2 ≤ 19.10 6 ≤ 57.30 10 ≤ 95.49 14 ≤ 133.69
3 ≤ 28.65 7 ≤ 66.84 11 ≤ 105.04 15 ≤ 143.24
4 ≤ 38.20 8 ≤ 76.39 12 ≤ 114.59
5 ≤ 47.75 9 ≤ 85.94 13 ≤ 124.14
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