Maintenance Manual of Retractable Grounding Reel
Grounding Reel (RGR)is designed to provide the lowest impedance connection
between the shell of a floating roof tank and its roof by creating the shortest
possible path between the two. This connection is obtained by keeping constant
tension on the braided cable.
RGR can be installed during erection, maintenance shut downs or during regular
operation of a tank. It needs minimal maintenance and is easy to install on
both new and existing tanks in petrochemical facilities
All site safety policies and procedures must be followed.
permission must be obtained prior to any maintenance of equipment. While the
LEC recommends the activities outlined in this document, each site is unique
and must follow its own requirements, procedures, and protocols.
2.0 Maintenance Frequency
are often installed in corrosive environment. The more corrosive the
environment, the more frequently inspection and maintenance must be performed.
At a minimum, the following should be performed in an annual basis.
Remove build-up from RGR cable and reel.
Visually inspect the RGR cable for dirt, corrosion or tear; if there is a tear
in the cable, replace immediately.
Ensure that all mounting base and bolts are mechanically tight. Tighten any
loose hardware immediately.
Never remove the reel from the mount if there is tension in the springs as the
handles will rotate in an uncontrolled manner.
1 Spring 2 Axle 3 Horizontal Bracket 4 Mounting Base 5 Reel 6 Wire Guide 7 Ground Ends
8 Braided Cable
Equipment and Materials
to the RGR is very simple and can be inspected and maintained using common hand
tools, as listed below. If permitted, photographs should be taken to document
the condition and method of connection between each RGR reel and the tank top,
as well as the connection of each ground strap to the foam dam or tank top.
wrench x 2
wheel or brush
Inc. NO-OX-ID “A-Special” or other electrically conductive lubricant
Shield or other electrically conductive corrosion inhibitor
Tank top inspection
Visually inspect the interface between the RGR bracket and the tank wall.
During installation, paint and rust must be removed from all contact surfaces
to ensure good contact. Contact surfaces should be sealed with a conductive
corrosion inhibitor to provide a reliable electrical connection between the RGR
bracket and the tank wall.
a digital multimeter (DMM) to measure the resistance between the RGR cable and
the tank wall. Verify that there is no measurable resistance or measurement is
less than 0.03 ohms.
Keep the reel clean.
Verify that the nuts and bolts securing the RGR are securely tightened.
If the main cable is
torn or frayed, consult the factory for a replacement cable.
Confirm the connection of the two ground straps to the RGR main cable
Visually inspect the ground straps for dirt, buildup, corrosion or tears.
the ground straps is torn or frayed, consult the factory for a replacement
Visually inspect the interface between the ground strap and foam
roof connection point. During installation, paint and rust must be removed
between all interface surfaces to ensure bare metal is exposed metal contact.
Use a digital multimeter (DMM) to measure the resistance between the RGR cable
and the floating roof . Verify that there is no measurable resistance or
measurement is less than 0.03 ohms.
4.2.4 As shown below in Figure 6, verify that all nuts and bolts connecting the RGR main cable to ground straps and ground straps to foam dam or floating roof connection point are securely tightened.
technical support please contact:
Alptec Safety Equipment Co., Ltd.
Hancheng Road, Qingdao Free Trade Zone, Shandong Province, 266555. P. R. China
18766256959 | Tel:+86 (0) 532 8689 4009
| Skype: email@example.com | www.staticgrounding.cn