Why Copper Bolts Are the Smart Fastener Choice for Industrial and Electrical

Not all fasteners are created equal. Standard steel fasteners rust, spark, and can fail under stress. As such, they are not an ideal choice for fasteners used in substation earthing systems, offshore platforms, and desalination plants, among others. The implementation of the right fasteners can reduce costs of downtimes and reworks. This article looks at the advantages of investing in copper fasteners.

Why Use Copper Bolts Instead of Standard Fasteners?

Stainless steel bolts are the go-to fasteners because they are cheap and readily available. However, there are situations where fasteners with high electrical conductivity are needed. Apart from that, stainless steel bolts are not ideal for fasteners used in explosive environments and in the marine industry.

Here are some of the advantages of using copper fasteners:

Electrical conductivity — When it comes to electrical bus connections and grounding connections, copper with 100% conductivity is ideal, compared to stainless steel fasteners with only 2.3% conductivity.

Non-magnetic and spark-free — Fasteners used in the oil and gas industry and some chemical plants must meet this requirement.

Cryogenic capability — Fasteners used in LNG terminals must be ductile and withstand extreme temperatures. Copper fasteners meet this requirement compared with other fasteners.

Choosing the Appropriate Copper Alloy for Your Application

Not all copper bolts are identical. Choosing the right alloy is especially important for selecting the right bolt for your application and location.

Alloy Conductivity Best Use C10100 (OFE) 101% IACS High-voltage busbars C11000 (ETP) 100% IACS Earthing, marine, general industrial C14500 (Tellurium) 93% IACS Precision instrumentation, automotive connectors C12200 (DHP) 85% IACS Plumbing brackets, pipeline U-bolts

In the case of a Saudi Aramco approved substation project, the most likely specified alloy would be C11000 ETP to meet ASTM F468. For automotive connectors and precision panel instrumentation, C14500 Tellurium would be an excellent choice. C14500 offers an excellent machinability rating of 90% along with relatively good conductivity.

Common Applications for Copper Bolts

What is often underestimated is the number of applications and the number of industries copper bolts are specified. Here is a partial list of actual applications:

Power substations — Earthing and grounding bolt assemblies.

Offshore oil & gas platforms — Non-sparking fasteners for hazardous zones.

Desalination plants — Seawater resistant carriage and hex bolts.

LNG cryogenic systems — Low temperature rated stud bolts.

Marine jetty construction — Structural carriage bolts with patina protection.

Petrochemical plants — H2S resistant fastening for pipeline brackets.

What to Consider When Sourcing Copper Bolts for Industrial Projects in Saudi Arabia

When sourcing for a SABIC, ADNOC or Saudi Aramco approved project, be sure to take the following into consideration:

Be sure to request EN 10204 3.1 Mill Test Certificates. For major oil and gas clients, third party tested stock is a must.

Be sure to verify the UNS number and not just the trade name. C11000 and C10100 may appear the same, but they are substantially different in conductivity.

Torque specifications must be checked before installation since a common error in the field is over tightening copper hardware. However, copper does have a lower tensile strength than steel, which could lead to issues.

Use bi-metal washers to prevent galvanic corrosion in copper bolts that interface with stainless steel components.

Pipingmaterial.sa helps identify reliable suppliers who have verified copper bolts in Dammam, Riyadh, Jubail, and Al Khobar. They also provide fast delivery with products in stock. Pipingmaterial.sa connects buyers to SABIC and Saudi Aramco approved stockists with no middlemen and no commissions.

Final Thought

Copper fasteners, though specialized, become the clear choice once you identify the advantages over the standard steel fasteners in certain environments. The most important factor is identifying the right alloy for the application combined with a supplier who has the correct mill certifications.