Product description
PROCESS STEPS
LPG Cylinder Production is composed of several sheet metal forming, surface treatment and testing processes. The process starts with blanking, deep drawing and piercing, trimming and joggling. Next are the welding operations for valve boss, valve guard ring, foot ring and the two halves. The finished cylinder is then heat treated, tested, shot blasted, painted and then the valve is attached and final tested.
The main process steps are summarized below
2.1 LPG Cylinder Body Forming Line
2.2 LPG Cylinder Trimming & Beading
2.3 LPG Cylinder Guard Ring Production Line
2.4 LPG Cylinder Bottom Ring Production Line
2.5 LPG Cylinder Welding Line
2.6 LPG Cylinder Quality Controls
2.7 LPG Cylinder Heat Treatment Furnace
2.8 LPG Cylinder Shot Blasting
2.9 LPG Cylinder Metallization Line
2.10 LPG Cylinder Painting Line
2.11 LPG Cylinder Testing Line
LPG Cylinder Blanking & Body Forming Line
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 machine
LPG 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.
LPG Cylinder Hydrostatic Testing Line & Other Supplementary Machines
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.
3. Our Capability of the TURN-KEY Project
To make LPG Cylinders, you shall need to design from the very first of LPG Cylinder Drawing, Factory Machine Layout Drawing, Foundation Basement Drawing, Production Flow Design, Machine production, Shipping, Installation and Commissioning, After-sales service. Longterm will help you from the beginning to the end. To assure you can fully in normal production of LPG Cylinders. No matter you are experienced manufacturer of LPG Gas Cylinders or not, LONGTERM will be your Best Choice!
Timely & Satisfied oversea installation service
We have rich experience for oversea installation and commissioning work, we always send the skilled engineers for assisting our clients to run the machine smoothly and quickly.
The Production Line Cases for Your Reference
Factory Site
Wuxi Longterm Machinery Technologies Co.,Ltd. specializes in LPG cylinder machinery with 30 years' background, supplying the better machine to help our customers gain more profits is the motivation to let us move forward all the time, the experienced technicians and the well-trained sales are the guarantee for each project, whatever the turnkey project or the existing plant upgrade project, we provide the pro-support of each aspect to serve our customers well all the time.
Thus far, our machine is sold to US, Brazil, Turkey, Argentina, Thailand, Vietnam, Kenya, Tunisia, Nigeria, Bangladesh,
Philippines, Uganda, Sudan, Lebanon, Ecuador, among of them are the well-known LPG cylinder manufacturers in the world, such as Manchester tank from US (Indian branch factory), TPA from Vietnam, Aygaz from Turkey, MBG from Tunisia, Cylinder works from Kenya,Ferrotechsteel from Philippines, BM Energy from Bangladesh. Our machine helps them achieve an obvious improvement on saving the manpower and increasing the productivity.
Certification & Report
Although it's one-pass welding, the welds quality can be guaranteed, we haven't got any complaint about the welds quality from our clients yet. In China, one cylinder will be selected from each batch randomly to do X-ray testing and the burst testing.I believe these tests will be done in your country as well.
Some pictures of our exhibition before 2020.
We will travel to Europe, Southern East Asia, South Amercia, North America, Africa every year.
FAQ
Q: What size of LPG cylinder your machine can produce?
A: 6kg, 12kg,15kgs and 50kgs LPG cylinder for cooking and other size according customers' requirement.
Q: Can you design machines according LPG cylinder technical drawing?
A: Sure, please send your technical drawing to us.
Q: What are the benefits to choose your machines?
A: Our machines are strong and reliable for long term industrial manufacturing
We need to know following information to quote you correct machines:
1.Technical Drawing of the cylinders you want to make?
2.What size of cylinder you want to produce?(such as 6kg, 12kg)
3.What diameter and thickness of the cylinder you want to make?
4.Are you new in this area or you already have some machines in the workshop?
5.Capacity you require, i.e. how many pieces and sizes you want to make per day?
Audited Supplier 
){kind=link}