Lindsey Elliott is really into bolts. At last year's 13th annual Bolting Symposium, she said the highlight was playing "Bolting Bingo" against a room full of self-proclaimed "torque dorks." This is what passes for a wild time in the industrial piping world, and frankly, it's more wholesome than most tech conferences.

A former engineer and planner at ExxonMobil, Elliott has spent years pondering how to improve the infrastructure that moves oil, gas, and petrochemicals. She landed on bolts - specifically, the ones connecting sections of pipe, technically known as "bolted flange joints." These bolts require hard physical labor to loosen and tighten, and they're a leading source of pipefitter injuries. Like many trade industries, there's also a labor shortage, because apparently nobody dreams of growing up to torque things in the rain.

"Those people get really tired when they're asked to work 12 hours a day for three months in a row," she told TechCrunch. "I've talked to pipefitters across the U.S. across Canada, and just repeatedly have been told North American pipefitting productivity is notoriously low."

Her solution, at her startup Nexterity - one of the Startup Battlefield 200 selected for TechCrunch Disrupt - is a remote-controlled robot that handles this part of the job. If widely adopted, it could fundamentally change this blue-collar profession, making workers safer and more productive, which is the rare automation story where the robots are arguably the good guys.

The robot comes in two main pieces that fit around a pipe. Powered by batteries, it slides across the pipe once attached and quickly loosens and tightens four bolts at a time - roughly four times faster than a human with a wrench and a grudge.

Elliott said Nexterity has developed several configurations to fit different standard pipe sizes, all small enough to fit in a Pelican case and be carried by a single worker. That portability makes them easy to deploy to new sites - flexibility crucial to Nexterity's business model of treating the robot like rental construction equipment.

Elliott arrived at this design through years of conversations - not just at the Bolting Symposium, but with members of the Pressure Vessels & Piping Division of the American Society of Mechanical Engineers.

"What I learned from the people, the torque dorks per se," she said, "is that 80% of our pipes are between two to eight inches in diameter, or what they call NPS2 to NPS8. And so when you have that much repeatability, you have a fantastic candidate for automation."

It's a straightforward idea, but Elliott believes it has enormous upside.

"I think it would shock a lot of people just how big this market is," she said. "I mean, day to day, most of us don't think about piping infrastructure, but even water, wastewater, water treatment, food and beverage, mining, nuclear, any kind of green and sustainable manufacturing facility - they all use the same kind of piping." Which is to say, the humble bolted flange joint is quietly holding civilization together, and now a robot gets to do the twisting.