Port Neches – October 18, 2026 -- Before a propane supplier can legally refill your cylinder, federal rules require a check of its stamped markings and a visual inspection for damage, and Texas owners whose tanks fail may be turned away.
Stamped markings must be reviewed before every refill
The U.S. Department of Transportation regulates the manufacture, marking, and maintenance of portable pressurized cylinders. Under its rules, each cylinder must carry identifying information stamped into the collar or handle area: the manufacture date, the cylinder specification, and any requalification dates from earlier inspections. A filling station attendant must review that information before refilling.
Inspectors look for five warning signs
The visual check is designed to catch conditions that make a cylinder unsafe to pressurize. Inspectors look for:
- external rust or corrosion
- dents or gouges in the tank body
- damaged or missing valves
- evidence of heat exposure
- signs of modification or structural compromise
A cylinder showing concerning conditions in any of these areas may be refused service until a qualified professional evaluates it.
Gulf Coast humidity speeds up rust on outdoor tanks
In Port Neches and the surrounding Southeast Texas region, humid conditions can accelerate surface corrosion on steel cylinders. A tank that looks fine after one summer may show noticeable rust after two or three seasons outdoors without protection from moisture. Homeowners who store cylinders outside year-round should check them periodically rather than waiting until refill time, because corrosion can progress quickly in high humidity.
A stiff or leaking valve sidelines the cylinder
A valve must open and close reliably, seal fully when closed, and let the pressure relief function work as designed. If a valve is stiff, leaking, or physically damaged, a qualified technician must address it before the cylinder can be safely used or filled.
Requalification applies regardless of appearance
Cylinders that reach the end of their certification period must go to a requalification facility, even if they look fine. Depending on the cylinder's age and condition, that inspection may include internal examination and pressure testing.
Repair versus replacement depends on the damage. Minor surface rust that does not affect the structural integrity of the tank body is treated differently than deep pitting or corrosion near the valve. If a qualified inspector recommends replacement instead of requalification, the article advises following that recommendation.
The guidance comes from a HelloNation article featuring Ken Young Jr., a Propane Expert with Young's Tobacco Store in Port Neches.