A field foreman’s guide to failed exothermic welds — the five process causes, the diagnostic walk-through, and an interactive weld failure diagnostic you can run before you cut anything out.
TL;DR — Field answer up front
Most “sudden” exothermic weld failures are not sudden ...
For oil & gas contractors, cathodic protection welding materials are the consumables that attach test leads, anode cables and bonding conductors to a buried pipeline — and the procurement decision comes down to three things: a thermit welding powder matched to your conductor material and size...
Searching for Cadweld equivalent molds usually means one of three things: your tender specifies Cadweld by name and allows “or approved equal”, your crew already owns handle clamps and you need molds that fit the same connection geometry, or you are simply comparing the brand-name pri...
We hear the exothermic welding vs clamps debate weekly, and the deciding factor is not day-one performance — both can measure beautifully at commissioning. It is what happens to ground connection resistance after 20 years of soil chemistry, thermal cycling and fault currents. I am Jane Yang, sale...
An exothermic welding kit earns the label “field-ready” only when a crew can open the box at a remote site and complete a safe, standards-grade connection with nothing else. No external power, no missing flint gun, no improvised PPE. I am Jane Yang, sales manager at Xinchang Shibang N...
Africa is in the middle of the largest rural electrification push in its history, and every kilometre of new line, every distribution transformer and every mini-grid needs earthing materials that utilities can trust for decades. As of 2024, around 600 million people in sub-Saharan Africa — 47% of...
When a project buyer sends me a bill of quantities with 200 earth pits on it, the line item they are comparing is almost always the unit price. I understand why — it is the only number on the page. But after 12 years of shipping inspection pits into grounding projects on four continents, I can te...
We published our own TOP5 electrolytic ion ground rod manufacturers roundup for 2025, and I stand by it as a market map. I read brand lists as market maps: they tell you who sells rods, but nothing about whether the tube arriving at your site will hold resistance for 30 years in your soil. In the...
A ground rod failure almost never announces itself. The rod keeps standing, the clamp keeps shining above grade, and I usually see the corrosion discovered only through a failed earth-resistance test — or worse, a fault that finds no path home. I see exactly four forensic patterns in the exhumat...
Last quarter a buyer forwarded me a competitor’s ground rod salt spray test report and asked one question: “Is 96 hours good?” My answer surprised him: the number was the least important line on the page. ASTM B117 is a chamber-operating practice — it tells the lab how to run...
When an EPC buyer sends me a substation grounding RFQ, the first two lines I read are the fault current and the soil resistivity — not the rod diameter. That order matters. IEEE Std 80 does not tell you to buy a 5/8 in or 3/4 in substation ground rod; it tells you to survive a fault. The rodR...
TL;DR — The Sizing Answer in 60 Seconds
For most IEEE Std 80 substation grids we specify copper bonded ground rods of 14.2–19 mm (5/8″–3/4″) diameter and 2.4–3.0 m (8–10 ft) length — diameter for corrosion life, length for resistance.
Doubling a rod’s length cuts resistance by roughly 40...
