BUILDING TRUST
Get high-purity oxygen, nitrogen, argon, and carbon dioxide for the subway and urban transit industry.
We offer precise real-time monitoring, mobile alerts, and predictive usage — reduce runouts so you have fewer costly, last-minute deliveries, even during peak commuter seasons and critical subway fleet maintenance windows.
Get your first delivery within 48 hours in California or Arizona.
We are proud to offer standard next day delivery, same-day delivery, and available 24/7 monitoring.
From the first walkthrough to delivery and beyond, our team is always ready to serve.
Our gas experts walk through your setup to build systems that prioritize safety and efficiency.
No matter the volume or type of gas, our state-of-the-art labs and highly-skilled production teams deliver.
Our drivers consistently perform in high-pressure environments and champion things such as customer care, road, and onsite safety.
Stop paying rent on cylinders that aren’t in your possession. And enjoy sustainable service with less deliveries thanks to telemetry’s mobile alerts, real-time measurements, and usage trends.
The days of chasing invoices and updating billing info are gone — access your account and re-order with confidence (and ease).
With WestAir cylinder tracking only pay for the cylinders that you are using. Never overpay for storing empty unused cylinders ever again.
Learn more about the different gases commonly used in the subway industry.
O₂
Used in welding and cutting during railcar chassis repairs, door system maintenance, and structural work.
C₂H₂
Used alongside oxygen for cutting and brazing during railcar and infrastructure repairs.
Ar
Used as a shielding gas for MIG and TIG welding of aluminum and stainless steel railcar components.
CO₂
Used in concrete production and curing during tunnel construction and repair work.
N₂
Used for pneumatic brake system testing, door system purging, and pressure testing during railcar maintenance.
Learn more about the subway gases and services we offer.
Nitrogen (N₂) The most widely used utility gas across subway operations. Essential for pneumatic brake system testing, door system purging, fire suppression pressurization, A/C system pressure testing, and electrical switchgear inerting. Found in virtually every railcar maintenance facility, subway station, and tunnel operations team.
Oxygen (O₂) Critical across two distinct applications — medical emergency oxygen systems at subway stations and on transit authority emergency response teams, and welding and cutting during railcar chassis repairs, tunnel construction, and structural infrastructure maintenance.
Yes. We offer real-time monitoring for most of our gas applications to make sure you never run out. Our solution provides you (and us) with accurate updates on your levels so we can optimize your gas delivery, detect leaks and other issues – saving you money while supporting our sustainability commitments.
Yes. We make true same-day deliveries with no qualifications. If you call at 4:55 pm and you need a same-day delivery, we will deliver that day.
We offer cost-effective bulk gas solutions including bulk oxygen, acetylene, and argon for the automotive industry. Your products will be safely delivered by our modern fleet of fuel-efficient trucks, equipped for cylinder and bulk gas delivery.
Yes. WestAir barcodes each cylinder and will scan each cylinder when it enters and leaves your location. This eliminates the need for you to perform time-consuming and error-prone inventory tracking. This process also guarantees accurate monthly billing statements.
Yes. Our dedicated account management and 24/7 emergency service is there to make a bad day better.
Supporting refrigeration, packaging, preservation, and heating needs, ensuring product quality and freshness.
Supporting accurate emissions testing and regulatory compliance, ensuring clean air standards.
GET STARTED
Fill out the form and one of WestAir’s subway gas experts will reach out to you about your specific business needs.
