Automatic 9lb 20lb LPG Cylinder Production Lines

In the core of the forming line there stands a versatile double action LTM hydraulic deep drawing press that forms the cylinder halves out of round blanks that are blanked by a single action double blanking LTM press or directly from the coil material by help of LTM design combined deep drawing, piercing and blanking die set. The edges of the upper and lower halves are further processed by LTM trimming and joggling machines to the perfection stemming from the sheet metal forming expertise of LMT to make it read for the body seam welding after degreasing.

LPG Cylinder Halves Forming Line

Wuxi Longterm Machinery Technologies Co., Ltd. is the professional LPG gas cylinder machine manufacturer with more than 35 years’ experience in both design and manufacturing for LPG cylinder new line, old cylinder reconditioning line. With good reputation and qualified machines, we have supplied several high standard LPG cylinder production lines to the world markets, like T**Cylinder, Si***a Cylinders,F***tech Steel Corporation, K***ol cylinder,J** Gas Inc. (USA) and Chinese 95% Market….

We keep improving our machine technology all the time, our machines helped a lof of gas cylinder factories improve their production and gas cylinder quality with bigger capacity and much lower costing. For your better understanding, I am listing as follows:

1. Cylinder body auto making line, from decoiler to deep drawing, jogging and circle welding.
A: Fully automatic + Robots Auto feeding
B: 1000pcs/ 2000pcs Capacity as your needs
C:Only need max 3-5 people (only for change welding wires/ nozzels)
D:Video/ laser tracking +Patent Panasonic Welder
E: Workshop Land Saving, Cutting/ jogging/polishing in one machiLPG Cylinder Body Forming Welding Line

The submerged arc welding technique is applied on the welding of body halves on the seam welding machine and generally on the wielding of the valve boss to the upper cylinder halve. The welding automats with reliable welding power packs and control units are utilized to achieve the uncompromising weld quality with degree of automation needed for the required production capacity per customer. The MIG/MAG welding technique is applied for the welding of foot rings and valve guard rings with the body halves.
Welding is the most critical part of the production line, which engages the best cylinder performance and assures the good quality. Our welding machinery is the best cylinder & pressure vessel welding equipment in China and also TOP Ranked worldwide.
Full-auto welding machine includes socket welding, handle/collar welding, base ring welding, circumference welding, and all machines work automatically, the cylinder halves are conveyed by mechancial arm and chain, this system really saves much labor cost and improve the working efficiency apparently.
In order to relive all the stresses caused by forming and welding operations, the cylinders are passed through a heat treatment furnace where they are exposed to 930 º C degrees of temperature for certain time before getting cooled gradually.

The LPG cylinders surfaces are shot blasted by the shot blasting machine in order to clean up the scales caused by the heat treatment operation to make the surface ready for the painting and or zinc spraying for those customers who requires zinc coating before painting. The double layer over cured painting of the cylinders is achieved automatically by the robotic paint application system in the painting line as the cylinders conveyed on overhead conveyor system through the primary and final coat painting cabinets separated by flash off tunnels before they get cured in the canopy type modern paint curing oven.

After the tare weighing and marking of the cylinders, the valves are attached by automatic torque controlled screwing machines and tested against any leakage at the valve region by the pneumatic leakage testing machine of the finishing line.

One of the batch type quality control equipment called by the international standards is the burst expansion testing unit where the volumetric expansion ratio and the burst pressure is measured to the full satisfaction of even most stringent requirements.