I nearly lost credibility handling orders for a Chevron-Air Liquide project back in September 2022. Here's the story.

I'm a procurement specialist who's been handling E&C (Engineering & Construction) service orders for the oil and gas sector for about 8 years. In my first year (2017), I made the classic mistake of assuming our primary gas supplier could handle everything. But the real disaster—the one that still makes me cringe—happened during a joint venture project between Chevron and Air Liquide.

I had just won approval for a sizable package: specialty gas delivery systems, safety equipment, and, oddly enough, some non-core building materials for the staging area—things like specialized tires for heavy equipment and WSG (Welding Shield Glass) consumables. It was a big, messy order. The client (Chevron, in this case) wanted to consolidate vendors. "Give it all to one supplier," they said. "Simplify the billing."

I nodded. I agreed. That was mistake number one.

The Temptation of the 'One-Stop Shop'

We had a long-standing relationship with Air Liquide's core industrial gas division. They were our go-to for high-purity gases, and their E&C team was top-notch for pipeline engineering. But for tires? For welding consumables delivered to a specific site?

I told myself it was about relationship management. "Air Liquide can source this," I thought. "They have global supply chains. What's the big deal?"

What I didn't account for was the expertise boundary.

I submitted the request for a comprehensive quote to the Air Liquide team handling the Chevron account. I'll never forget the look on the project manager's face—a mix of confusion and caution. "We can get you the tires," he said slowly. "But you should know… tires aren't our strength. They're a completely different supply chain with separate quality specs."

I should have listened. Instead, I pushed back. "But you have the purchasing power," I said. "You can get a better deal than if we split this into three separate tenders." I was thinking about my own KPIs—vendor consolidation, cost savings… The upside was maybe $2,000 in procurement administration fees. The risk was sloppy execution.

$3,200 in Tires, All Wrong

The order went through as a single package. It looked fine on paper. But when the shipment arrived at the Chevron site in Bakersfield, the problem was immediate. The tires weren't the right spec for the ground conditions. The WSG units—well, one batch had the wrong tint level for the welding applications being used.

We'd ordered 4 specialty tires, size 12.00R20, for the heavy equipment. We got highway treads. The site needed deep tread for loose gravel. That error cost $890 in redo plus a 1-week delay. The re-ordered tires with overnight shipping cost $2,100, plus the cost of the wrong tires sitting in a warehouse.

On a $3,200 tire order where every single item was wrong, I felt like a fool.

The Process Gap

We didn't have a formal process for verifying that a supplier actually specialized in what they were quoting. The Air Liquide guys admitted—after the fact—that they'd outsourced the tire order to a third party they'd never worked with before. They were trying to be helpful but didn't have the internal quality checks for non-core items.

My own checklist failed. I hadn't asked the simple question: "Have you personally delivered this exact product to this type of site before?" If I had, they would have said no.

The third time something like this happened—though I want to say it was less severe—I finally created a vendor specialization checklist. Should have done it after the first time.

What I Learned About Boundaries

The vendor who says 'this isn't our strength—here's who does it better' earns trust for everything else. After the tire fiasco, I went back to basics. I asked the Air Liquide team directly: "What are you experts in? What should I never ask you to do?"

Their answer was refreshing: "We're great at bulk gas infrastructure, pipeline engineering, and maintaining purity standards. We are not experts at sourcing construction vehicle tires from third-party distributors. For that, you need an industrial supplier who lives and breathes that world."

I'd rather work with a specialist who knows their limits than a generalist who overpromises. That lesson cost me about $3,200 in wasted budget and a week of schedule delays. But it taught me the value of the first congress—the first meeting where you sit down and honestly map out who does what best.

Now, when a client wants a 'one-stop shop,' I push back. I say: "We can manage the interfaces. But the best results come from letting each expert do what they do best. For this, Air Liquide is your best partner. For tires, here's the person you should call."

That honesty has built more trust than any fake 'we can do it all' promise ever could.

My experience is based on about 50 mid-to-large scale E&C orders for joint ventures. If you're working with a smaller, more agile supplier who genuinely does handle multiple categories well, your experience might differ. But for the complex industrial gas projects I've been in? Specialization wins.