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LPG Gas Cylinder Heat Treatment Furnace for All Sizes

  • 60 PCS/Hr

  • 0.336~1.68 R/Min

  • 104~232 Kw

  • 600 Degree

  • 12600*1240*1560

  • 2000 PA

  • Available

  • 1 Year

  • Available

  • Gas, Diesel, Electricity

  • Standard Seaworthy & Strong Package

  • SGS, ISO

  • Comflex

  • Wuxi, Jiangsu, China(Mainland)

  • 85152100

  • 1000sets/Year

  • Available | Customized Request

Product Description

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

Technical specification

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

I. Frequency heating principle:

Frequency heating is using frequency power to change 380V, 50Hz power current into the suitable frequency current by rectification and contravariant. Input this current into resonant tank composed by the heating furnace, to make the furnace coil produce alternating magnetic field, while the pre-heating metal material stay in the alternating magnetic field, the material will produce the alternating current and heating by itself, high hot efficiency and low energy consumption.


Frequency induction heating power factor≥96%, has automatic impedance adjustment function, the performance of energy saving is obviously.

Power output is steady, heating temperature is easy to control, good consistency to improve the heating quality.

Good diathermancy, magnetic field has a good permeability to the metal workpiece, it's not heating conduction, so the temperature difference of workpiece movements is small and improve the products' quality.

Temperature measuring system closed-loop control heating power, the precision of temperature is high.

Automatic impedance adjustment and automatic frequency adjustment function, inspecting system impedance transformation caused by the cylinder from cool to hot during the whole heating process automatically. Adjusting the output parameter automatically and making the whole heating process stay in energy-efficient state, saving more power.

II. Heating process requirement:

9KG, 14KG LPG cylinder production line:

Workpiece size: 9KG, 14KG LPG cylinder

Heating temperature: 780 - 900°C (The heating temperature sets according to the technology demand, adjustable)

Mixed production line heating speed: 14 second/per cylinder

Productivity: 2000 pcs / 8 hours

III. User required equipment power calculation:

9KG, 14KG LPG cylinder production line:

Size: BPS-550 frequency power. GT-9, 14/550 name: 9KG, 14KG LPG cylinder frequency heat treatment furnace.

Power: 550KW

IV. Composition of cylinder heating treatment equipment:

1. BPS series frequency power: one set

Size: BPS-550

Rated power: 550KW

Shunt capacitor: one set (under the furnace)

Power factor: Full power state arrive more than 96%.

A. Advanced control system:

The frequency power uses intelligent control system, it is a new SCR generation control system designed by absorbing the advance frequency heating technology both Chinese and foreign and special requirement for cylinder. The intelligent control system uses line unit design, all working units have luminotrons to display working state, the calculation of control system is processing in the special CPU module. It is reliable, steady and easy to maintain.

B. Adjustable power output:

During the power of equipment is 0 - rated power can be adjusted continuously, increasing the power adjustment output function, the low power of 9KG cylinder operation can guarantee the best working state, to ensure the commutating voltage reach 500V, improve the heating efficiency and save the energy consumption.

C. Complete protection function:

Not only equip with over-voltage protection, over-current protection, voltage restriction, current restriction functions, but also the intelligent protection system has the reliable release circuit while using the over-voltage high voltage, improve the frequency power running steady greatly, and has the over-temperature alarm function of cooling water temperature.

D. Obviously energy saving:

Retain all original functions in the intelligent control system, The unique design of the regulating function of impedance in the working process of the equipment according to the furnace workpiece (charge) impedance changes during heating (the inherent characteristics of the workpiece, the burden is in the process of heating) the working parameter adjustment of inverter power supply, the working efficiency is the highest in the state, so the high efficiency, energy saving, time saving. Frequency power intelligent impedance adjustment function, intelligent protection function is the domestic unique technology

E. Reliable starting system:

Zero voltage sweep frequency starting mode without impact, and the impedance adjustment function in the intelligent control system, making the essence of starting ability of frequency power has been greatly improved.

F: Automatic testing frequency output:

Intelligent control system, testing the change of system inductance caused by the cylinder temperature changing during the heating process automatically, adjust the output parameter in real time, making the whole heating process stay in high efficiency state and saving energy.

G: Simple troubleshooting:

Digital intelligent control system has fault display function, easy to find the fault, you can find the fault of the intelligent system without inspecting the equipment. Easy to maintain.

2. Heating normalizing furnace

It is made up of rectangular copper tube, which is optimized by computer. Aluminum alloy and insulation support, strong, long life. It consists of preheating section, heating section and insulation section

A: Pre-heating furnace: 1 set; length*width*height: 450*700*700mm

It consists of a metal material bracket, an efficient refractory material and a heat insulating material, no energy consume and heavy. Using the heat energy spillover the furnace for pre-heating.

B. Heating furnace: 3 sets (integrated design); length*width*height: 1350*700*700mm

Power: 550KW

Furnace voltage: 750V

Dimension (length*width*height): 1350*700*700mm

It is made up of rectangular copper tube, which is optimized by computer. Aluminum alloy and insulation support, strong, long life. Three sets heating furnace use integrated design, it can heat multiply cylinders at the same time. Compare with old type single cylinder heating furnace, the new design can still guarantee the heating time for each cylinder to ensure the heat treatment quality after shorting the heating time.

C. Heat holding furnace: 2 sets

Dimension: 1400*700*700

It has the advantages of high efficiency, good heat preservation effect and long service life, which is composed of a metal material bracket, an efficient refractory material and a heat insulating material. The heat holding furnace including two parts.

D: Cylinder feeding system:

Consists of structural steel, stainless steel, pneumatic cylinder, etc. After completing the cylinder into the furnace heating and heating into the holding furnace. The method of cylinder feeding into heating furnace is pushing by the feed mechanism equip with the heating equipment. At the same time the deed mechanism on the other end of the heating equipment pushing the annealing cylinder into cylinder unloading conveyor.

E: Operation control system:

Setting heating process (set heating time and heating temperature), automatically control heating temperature and propulsion system. The electric control system sends out the instruction to complete a series of actions, such as pushing the cylinder into the furnace, heating, measuring temperature, and unloading cylinder, to ensure the whole process working as the setting parameter. Process requirements set on the touch screen, pushing the cylinder into the furnace, heating, temperature, unloading cylinder of a series of actions by the PLC control. The heating process parameters of each cylinder are recorded in the touch screen, and the temperature recording data can be extracted through the U disk. It can print the heating process parameter of all cylinders or check some printed cylinders. It can be operated by the operation table printer or print by U disk. During working touch screen display setting heating temperature, cylinder temperature, display and record the maximum cylinder temperature. Display and record the number of heating cylinders. For the occasional unreasonable data can be modified later.

It can also be provided with a heating speed, so that the pushing mechanism can push out the cylinder according to the set speed.

3. Closed loop temperature control system:

It consists of Infrared temperature measurement signal sampling sensor, temperature control system, etc. Reliable, high precision, strong anti-interference ability.

Temperature measuring range: 50~1200°C

Precision: ±1%

During working the heating temperature is set according to the requirement of heating process. When the cylinder reaches the set temperature, the control system sends out the material pushing signal, and the pushing mechanism pushes out the cylinder which reaches the setting temperature to enter the heat holding furnace.

The infrared sensor is installed on the special bracket, equips with protective cover.


A: When each cylinder is heated, it is in the monitoring of the heating temperature control system, the consistency is good, and the heating quality is ensured, and the energy loss caused by the failure of the heating and the defect of the product quality can be avoided.

B: Closed loop temperature control system, can prevent burning, waste, reduce power consumption.

C: Dual control of heating temperature and power, with over temperature automatic power regulation and over temperature shutdown protection function.

Control cabinet

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

Burner nozzle

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

Complete LPG gas cylinder production line

I. Machinery list:

No. Description Size&Specis Unit
I Main Equipment
1 Hydraulic Press 500T set
2 De-colier and punching machine for small round sheet cutting from big sheet (material preparing for shell) XL-2 set
3 Material cutting mould on hydraulic press set
4 63ton hydraulic logo stamping machine 63T set
5 Shell drawing machine 200/300 set
6 Shell forming mould LS-2 set
7 Automatic trimming machine QK-4 set
8 End dish necking machine SK-3 set
9 Cleaning machine QL-5 set
10 Hole punching machine CK-3 set
11 Valve Seat Welding Machine HP-2 set
12 Shroud welding machine HZ-1 set
13 Bottom base welding machine DZ-1 set
14 Assembling Machine ZH-1 set
15 Option NO.1:Circumferential Seam welding machine HJ-3 set
Option NO.2:Circumferential seam welding machine Single head MAG set
16 Annealing furnace with burner TW-1 set
17 Hydrostatic Testing Machine SY-6 set
18 Shot blasting machine QYP15 set
19 Spraying line JH-2 set
20 Valve mounting machine JF-2 set
21 Air Leakage Testing Machine Cm-2 set
22 Printing machine ZS-2 set
23 Roller conveyor line m
24 Curve Convoyer m
25 Conveyor line power set
26 Motorized testing pump set
27 Cylinder drying machine set
II Equipment For Accessories Manufacturing Equipment
28 Punching machine/power press 25T set
29 Punching machine/power press 63T set
30 Punching machine/power press 100T set
31 Bottom base hydraulic forming machine set
32 Shroud upper R hydraulic forming machine set
33 shearing machine 4mm*1.5m set
34 Shearing machine 4mm*2.5m set
35 Printing machine GZ-2 set
36 Coding machine BM-1 set
37 Shroud rolling machine set
38 Bottom base rolling machine set
39 Shroud mould set
40 Bottom base mould DM-2 set
41 Bottonm base welding machine set
III Auxiliary Equipment
42 Air compressor (screw) 10/0.8 set
43 Air compressor (piston) 2.0/3.0 set
44 Air storage tank 1m3/3Mpa set
45 Air storage tank 2m3/1Mpa set
IV Testing Equipment
46 X-ray detecting equipment 2505C set
47 Mechanical property testing equipment WES-600B set
48 Burst pressure testing equipment set
49 Ultrasonic wall thickness testing equipment set

II. Description for each equipment:

1. De-coil and punching machine for small round sheet cutting from big sheet(material preparing for shell)
Technical data:
Raw material specifications:
Plate Thickness:2-4mm Width of plate:Max.1170mm
ID of steel coil:450-800mm OD of steel coil:Max.1800mm Weight of steel coil:Max.25T
Coil blanking specification:Ø370-Ø615mm Blanking period:12s/time including auxiliary time

Hydraulic machine technical data
Motor power:46KW Norminal capacity:6300KN Max.working pressure:25Mpa
Slide travel speed:120mm/s
Working table size:2500mm(front+back)*1500mm(left*right)
Weight of decolier:12T Weight of hydraulic press machine:23T

2.63ton hydraulic logo printing machine

3. Hydraulic press drawing the head
Press the round sheet into a shell with dies.

4. Automatic trimming machine
This machine is reliable, easy to operate.
Technical data
Motor power:5.5KW Air pressure:0.6Mpa Trimming time:20s Weight of machine:1.5T

5. End dish necking machine

Technical data
Motor power:4.5-11kw Air pressure:0.6Mpa Thickness of plate:1-10mm
Necking head diameter:150-1200mm Necking time:10-50s (adjustable)
Weight of machine:1.5-3T

6.Cleaning machine
Technical data
Motor power:1.5kw Polishing motor power:1.5kw*2 Air pressure:0.6Mpa
Polishing wheel feed range:0.2-20mm Efficiency:180Pcs/hour Weight of machine:1.2T

7.Hole punching machine
Punch the hole on head of the cylinder
Technical data
Motor power:5.5kw Punching speed:180Pcs/hour Weight of machine:1.5T

8.Valve Seat Welding Machine

To complete the welding of valve seat ring joints. Ensure uniform forming, good appearance, weld penetration and weld width meets the technological requirements, the clamping is convenient. Using submerged arc welding technology, girth welding at one time
Technical data
Rated voltage:220V Motor power:0.25kw Air pressure:0.6Mpa

9.Bottom base welding machine
Complete cylinder base girth automatic welding. To ensure concentricity, uniform forming, good appearance, weld penetration and weld width meet the technological requirements, the clamping is convenient. CO2 gas shield welding process, complete in one time welding.
Technical data
Current:AC380V+N Motor power:0.55kw Air cylinder pressure:0.5-0.7Mpa

10.Protection enclosure welding machine
Complete cylinder base girth automatic welding. To ensure concentricity, uniform forming, good appearance, weld penetration and weld width meet the technological requirements, the clamping is convenient. CO2 gas shield welding process, complete in one time welding.
Technical data
Rated voltage:AC380V Motor power:0.55kw Air cylinder pressure:0.5-0.7Mpa

11.Assembling Machine
To assemble both halves of the cylinder together and get ready for welding
Technical data
Cylinder diameter:250mm Air cylinder pressure:0.5-0.7Mpa

12.Circumferential Seam welding machine

Option NO.1:
Technical data
Voltage:AC380V+N Motor power:0.55KW Rotation speed:Max.10rpm/min (adjustable)
Motor power:0.55kw

Option NO.2:
Technical data
This machine is applicated to automated MAG circumferential welding for LPG cylinder,fire extinguisher bottle,etc.
Welding Length:Max.1500mm Ø:250-400mm Thickness:2.5-6mm
This machine price include 1 set panasonic welding machine(Model:GL3-500A),1 set cooling water device,welding seam tracker.
Producing capacity:250 pcs/8 hrs

13. Gas car-bottom heat treating furnace machine
This furnace is designed to anneal LPG cylinders by applying flame from gas burner on the cylinders. It composes, burner, flaming chamber, smoke collector, rails, chain roller, exhaling system.
It feature includes, adjustable time, self-control thermometer, perfect heat treatment result and fire off pollution.

Technical data
Producing efficiency:75pcs/hr Feeding type:Chain drive/cylinder feeding
Cleaning size:Ø320*700mm------Ø420*1250mm
Dimension:(L*W*H):12500*1390*1560mm removable transport

14. Hydrostatic Testing Machine
The machine is special for steel cylinder of liquefied gas cylinders,applicable to manufacturers and testing station for wuthstand voltage test on cylinder.Irrigation,pressurization,pressure,maintaining centralized control and automatic pouring completed by using water pump,equipped with a water tank,water can be recycled.
Technical data:
Pneumatic pressure:0.6Mpa Motor power:3kw
Hydrostatic test pressure:3.2Mpa Weight:1.1T

15. Cylinder drying machine
The equipment is used for drying the bottle cylinder after water pressure test.

16. Shot Blasting Machine
Shot Blasting Machine for LPG Cylinder are predominantly used to clean LPG/CNC/GAS cylinder in a continuous through feed process, remove remains of casting sand and cores, rust, old paint, visible signs of welding, eliminate surface stress, improve the fatigue strength of the workpiece, increases workpiece film adhesion of the paint job, and ultimately achieve the aim of improving the quality of surface and internal, prepare for surface protection (coloring, enameling, galvanizing, etc.).
Technical data
Produing efficiency:80-120pcs/hr Shot blasting machine:2 sets
Hoist motor power:2.2KW Total power:31.2KW
Weight:16T Workpiece size:Ø320mm*680mm
Machine dimension:(L*W):7885*2460mm

17. Spraying production line
The spraying producing line for U track,using electric or natural gas,fuel oil,coal heating,hot air circulation,the allocation of fixed automatic spray gun 4,manual gun 1.Spraying powder or paint on the steel cylinders apperance.The cylinder into the oven drying after spraying
Technical data
Working voltage:380V 50HZ Air pressure:0.4-0.6Mpa
Total power:15KW Working efficiency:180Pcs/jr

18. Valve mounting machine
The equipment is suitable for the liquefied petroleum gas cylinder angle value installation and use,it absorbs the domestic and foreign advance technology,using electrical control,pneumatic clamping,torque adjustable device,when reaching a certain torque,and go to the specificed direction after the automatic shutdown.The machine operation and flexible,convenient and safe
Technical data
Motor power:2.2KW Motor speed:1400r/min
Work spindle speed:15.5r/min Working air pressure:0.5-0.6Mpa
Consumption per hour:1.14m3 Clamping cylinder stroke:120mm
Rotation speed ration:1:59 Weight:0.9T

19. Leakage Air Test Machine
The device for cylinder do tightness test with,composed of a water tank,a lifting cylinder,a bottle feeding machine,electric control part and other parts,work a bottle feeding mechanism of automatic cylinder will send to be test station,a lifting cylinder will fall into the water.the operating personnel rotation observations of the cylinder is not leaking cylinder,after the test and the cylinder out of water,a loop end.This machine is reasonable in structure,simple operation and maintenance.
Technical data
Air pressure:0.6Mpa Testing air pressure:2.2Mpa
Holding pressure time:60s Weight:1.8T

III. Machinery picture:

Automatic circumferential welding machine

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

Shot blasting machine

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

Powder coating line

LPG Gas Cylinder Heat Treatment Furnace for All Sizes

IV. Successful projects:

1 .TK Group in Bangladesh
2. Hangzhou Yuhang Zhangshan Steel Cylinder Co.,Ltd., it is 3rd biggest LPG gas cylinder manufacturer in China, daily output is 12000pcs including all sizes from 2kgs to 50kgs.
3. TPA is manufacturing extremely high quality LPG cylinders for North America, European,UK and Australia., we supplied automatic welding line for their China plant in Dongguan. Now we are building new LPG gas cylinder factory in Vietnam, Hangphone, at the end of July, 2017, it will be set up and commissed.
4. Mintai is a newly set-up LPG gas cylinder manufacturing factory in China, the reason we took you there is to see different equipment, especially the online x-ray testing device for the size more than 25kgs which is required 100% X-ray testing in China. The machines for handle and bottom base are samiliar with the ones we will supply to you
5: Shandong Huanri Group co.,Ltd. ,ho , they are biggest and strongest cylinder manufacturer in China, they bought our machines both for 12.5 and15kgs manufacturing and 50kgs manufacturing.
6.AYGAZ in Turkey,
7. Manchester Tank from USA



Copyright  2018 Wuxi Longterm Machinery Technologies Co.,Ltd. all rights reserved.

Address :No.2-18 Longshan Road, Wuxi National Hi-tech Industiral Development Zone, Jiangsu,China
Contact person: Ms. Kelly Huang
Tel :+86-510-85225618,85226980
Cellphone/Whatsapp :+86-15052276858, 13182761356
Skype ID:Kellyhuang7110
Wechat:+86 15052276858  
QQ: 188081344