01 Steel Plates Also Have "Household Registration Certificates"
You think it's just a pile of steel plates? No, they come with their own "birth certificates." Furnace batch number, chemical composition, -40℃ impact toughness value... If any one of these is missing, the quality inspection department will return it directly. Because LPG (liquefied petroleum gas) may be exposed to temperatures ranging from +50℃ to -20℃ during transportation, the steel plates must first prove they can withstand it.
02 Welding Station: A Spark-Filled "Operating Room"
A robotic arm welds the circumferential weld of a 10-meter tank to a mirror finish, and the next second it's pushed into the X-ray room for a "naked photo." Defect ≥ 0.5 mm? The entire weld is ground down and re-welded, a day's work for nothing. The welder says, "Here, the weld is cleaner than a face."
03 Pressure Test: Performing CPR on a "Mobile Bomb"
The tank is injected with water at 2.2 times the working pressure and held for 30 minutes; the outer shell cannot bulge by more than 3 mm. Next, the water is drained, then nitrogen is added to 1.1 times the working pressure. Every weld seam is then scrubbed with soapy water—every bubble triggers an alarm throughout the workshop. The factory manager joked, "This is to make the tank 'die' once, so it won't actually die on the road."
04. Regulations "Cloud Proctoring": Real-time Data Upload
The Ministry of Industry and Information Technology, the Ministry of Transport, and the Market Supervision Bureau are all online simultaneously: wheelbase error ±2 mm, vehicle axle load ±0.5%, wall thickness ±0.3 mm… If any data point is flagged as red, the system automatically locks the certificate printer. Want a "favor" certificate? Forget it.
05. Factory Departure: A QR Code = Its "Lifetime Passport"
Qualified vehicles receive a laser-etched QR code. Scanning the code reveals: steel plate furnace number, welder's ID, flaw detection film, pressure curve, and even the torque wrench number. Ten years later, if stopped by traffic police, its "childhood record" can still be traced in a second.
06 In Conclusion
So, the next time you see an LPG trailer quietly driving on the highway with an orange "Flammable Gas" sign, don't just assume it's a "mobile bomb." It's actually a safety terminal built with data, steel, and fear—it's "died" countless times in the factory, just to ensure your and my safety on the road.