Automatic 9lb 20lb LPG Cylinder Production Line Complete 12.5kg 35kg 45kg LPG Cylinder Production Line

The submerged arc welding technology is applied to the welding of the half of the valve body on the seam welding machine, usually used for the welding of the valve seat and the upper half of the cylinder. Welding automation units with reliable welding power packs and control units are used to achieve the degree of automation required for uncompromising welding quality and the production capacity required by each customer. MIG/MAG welding techniques are used to weld the foot ring and guard ring to the body halves. Welding is the most critical link in the production line, which guarantees the best cylinder performance and good quality. Our welding machinery is the best gas cylinder and pressure vessel welding equipment in China, and also ranks first in the world.

The fully automatic welding machine includes socket welding, handle/neck welding, bottom ring welding, and circumference welding, all machines work automatically, half cylinders are conveyed by mechanical arms and chains, this system really saves a lot of labor costs and improves work efficiency obviously. In order to re-relive all the stresses caused by the forming and welding operations, the cylinders pass through a heat treatment furnace where they are exposed to a temperature of 930 º C for a certain period of time before being gradually cooled.

The surface of the LPG cylinder is shot blasted by a shot blasting machine to remove the scale generated by the heat treatment operation, and prepare the painted and/or galvanized surface for customers who require galvanizing before painting. The double layer overcured spraying of the cylinders is achieved automatically by a robotic paint application system in the coating line as the cylinders pass primary and final coats on an overhead conveyor system separated by a flash channel before curing in the canopy Modern paint curing oven in the spray cabinet type.

After the cylinders are weighed and marked, the valves are installed by an automatic torque control tightening machine and tested for leaks in the valve area by a pneumatic leak testing machine on the finishing line. One of the international standards called batch quality control equipment is the burst expansion test device, which can measure the volume expansion ratio and the burst pressure, which fully meets even the most stringent requirements.