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Fast, simple and reliable electrical connections
Steal back time when fastening on steel
Electrical connections are often needed on steel structures to provide a physical connection to earth for elements such as instrumentation panels, pipe flanges and other electrical equipment. By earthing (or grounding) the elements, you protect the equipment as well as reducing the risk of electrical shocks for people around them. This is particularly important in energy and industry settings, with outdoor environments such as power plants, oil refineries and offshore platforms.
Primarily these connections provide three important functions:
- Bonding
Simple act of joining two elements together – such as pipe flanges, cable trays or steel structures – so that at least one of them is then earthed so the electrical current can be discharged - Earthing (or grounding)
Connecting a part which does not normally carry current – such as equipment, junction boxes or storage vessels – to the earth - Lightning
Can be either direct (a lightning strike) or indirect (through power and communications lines or through the earth via the earthing system) and protection is based on catching the current and discharging it to earth (lightening conductors, catcher rods etc.)
Alternative methods for fastening on steel
Alternative methods can be time-consuming, labour intensive and require extensive rework to coated steel. For example:
Welding
- Time consuming preparation of the coated steel e.g. with an angle grinder
- Creates a lot of sparks, which can be a hazard
- An experienced and certified welder is required
- May require a hot work permit and, on some sites, a dedicated fire watch
- Multi-layer painting common in the Oil and Gas industry can take 3 to 6 days, including drying time, meaning expensive and time-consuming rework
Through-bolting
- Drilling process can be time-consuming depending on the thickness and hardness of the steel
- Steel exposed from the drilling must be properly coated to avoid corrosion
- Access to both sides is needed
- Installer needs to work with small parts such as nuts, washers and bolts that may get dropped or lost
Clamping
- Limited in direction of attachment of the component since clamps require a specific orientation relative to the structural steel
- Access to both sides of structural steel is needed
- Very high material costs, especially for corrosion-resistant clamps in hot-dip galvanized or stainless steel
Two fast and reliable ways for fastening electrical connections on steel
X-BT blunt tip fastening
A revolutionary fastening technology where a blunt-tip stainless steel fastener with a smooth cylindrical or conical shank is driven by a powder-actuated tool into a pre-drilled hole in the base material, creating a high-quality connection.
- No damage to the corrosion protection coating in non-through penetration applications
- Fastenings in less than 2 minutes
Duplex stainless steel fasteners for highly-corrosive environments.
Watch the blunt tip videoS-BT blunt tip screw fastening
A revolutionary fastening technology where a blunt-tip stainless steel fastener with a screw type shank is driven by a torque controlled screw driver into the pre-drilled hole in the base material creating a tapped connection.
- No damage to the corrosion protection coating in non-through penetration applications
- Fastenings in less than 2 minutes
Duplex stainless steel fasteners for highly-corrosive environments. Duplex coated carbon steel fasteners for mildly-corrosive environments.
Watch the blunt tip screw videoHilti fastening methods
Fast
- A connection can be made in less than 2 mins
- Recoating not required – no time-consuming rework!
- Significant total cost of install savings
Reliable
- Stainless steel stud suitable for highly-corrosive environments
- Vibration-resistant system prevents the connection from coming loose
- Wide range of approvals
Simple
- Simply drill, fasten and connect
- No external power source required
- Weather independent
Electrical connections portfolio
X-BT-ER threaded stud
Stainless steel for low current electrical connections on steel in highly corrosive environments
Maximum cable cross-section
Up to 10 mm² or 8 AWG
Current resistance (grounding)
Up to 1.25 kA for 1 sec (IEC)
Current resistance (lightning)
Class N 50 kA
Base material
Steel, stainless steel, cast iron
Minimum thickness
8 mm
Tool required
SF BT A22 and DX 351-BT(G)
Available thread diameter
M6, M8, M10
Fastener material
Stainless steel A4 equivalent
Product group
Low current
S-BT-EF threaded screw-in stud
Carbon steel (duplex coated) for low current electrical connections on steel, in mildly corrosive environments
Maximum cable cross-section
Up to 10 mm² or 8 AWG
Current resistance (grounding)
Up to 1.25 kA for 1 sec (IEC)
Current resistance (lightning)
Class N 50 kA
Base material
Steel
Minimum thickness
6 mm
Tool required
SBT 4-A22
Available thread diameter
M8, M10
Fastener material
Duplex coated carbon steel
Product group
Low current
S-BT-ER threaded screw-in stud
Stainless steel for low current electrical connections on steel, in highly corrosive environments
Maximum cable cross-section
Up to 10 mm² or 8 AWG
Current resistance (grounding)
Up to 1.25 kA for 1 sec (IEC)
Current resistance (lightning)
Class N 50 kA
Base material
Steel
Minimum thickness
6 mm
Tool required
SBT 4-A22
Available thread diameter
M8, M10
Fastener material
Stainless steel A4 equivalent
Product group
Low current
S-BT-EF HC threaded screw-in stud
Carbon steel (duplex coated) for high current electrical connections on steel, in mildly corrosive environments
Maximum cable cross-section
Up to 120 mm² or 4/0 AWG
Current resistance (grounding)
Up to 14.4 kA for 1 sec (IEC)
Current resistance (lightning)
Class H 100 kA
Base material
Steel
Minimum thickness
6 mm
Tool required
SBT 4-A22
Available thread diameter
M8, M10
Fastener material
Duplex coated carbon steel
Product group
High current
S-BT-ER HC threaded screw-in stud
Stainless steel for high current electrical connections on steel, in highly corrosive environments
Maximum cable cross-section
Up to 120 mm² or 4/0 AWG
Current resistance (grounding)
Up to 14.4 kA for 1 sec (IEC)
Current resistance (lightning)
Class H 100 kA
Base material
Steel
Minimum thickness
6 mm
Tool required
SBT 4-A22
Available thread diameter
M8, M10
Fastener material
Stainless steel A4 equivalent
Product group
High current