Saf-T-Cart 503-20FW Firewall Cylinder Cart

The Saf-T-Cart 503-20FW carries an oxygen cylinder and an acetylene cylinder with a steel firewall between them, held by a permaclamp, on 20 in steel wheels. Saf-T-Cart says the steel wheels keep the cart flat free no matter how much abuse it takes.

Which cylinders fit: Saf-T-Cart lists cylinder capacity as 9-1/2 in and 12-1/2 in diameter. How to check your cylinders.

Specification	Value
Baseplate	23-1/2 in x 12 in on Saf-T-Cart's 2020 drawing (its product page lists 12 in x 24 in)
Height	60 in
Width	26 in
Weight	Not confirmed: Saf-T-Cart's product page lists 84 lb, the same figure as its non-firewall 503-20, and its comparable firewall carts weigh about 120 lb
Wheels	Two 20 in x 2-1/2 in steel wheels (Saf-T-Cart SC-13)
Cylinder hold-down	One permaclamp, per Saf-T-Cart's drawing
Cylinder capacity	9-1/2 in and 12-1/2 in diameter

Why the firewall: OSHA requires oxygen cylinders in storage to be kept 20 ft from fuel-gas cylinders and combustible materials, or separated from them by a noncombustible barrier at least 5 ft high with a fire-resistance rating of at least half an hour (OSHA 1910.253(b)(4)(iii)). Saf-T-Cart states its firewalls are at least 60 in tall, block the line of sight between the oxygen and fuel-gas cylinders and carry a 30-minute burn rating, and says its firewall carts meet and exceed OSHA 1910.253. When a firewall cart is the right call: the firewall requirement. How separation works in a shop or on a jobsite: gas cylinder storage guide.

Choosing between pneumatic tires and steel wheels: which wheels for your floor.

Built to order by Saf-T-Cart, typically ships in 10 to 15 business days. Dimension drawings from Saf-T-Cart: 503-20FW (PDF). Compare our other cylinder carts.