PROJECT PROFILE
ON LPG CYLINDER
2015
IMPETUS
TURNOMATICS
Introduction:
LPG Cylinder is an essential item for filling liquefied petroleum gas used for cooling purpose.
The body of LPG cylinder is deep drawn in two pieces then these are welded together to make a
compact unit without any leak and defect etc. LPG cylinders are in use in 5 Kg., 12 Kg., 14.2 Kg. & 19
Kg. capacities. To ascertain the quality, safety and performance certain regulations are applicable
such as BIS standardization and Explosive Lincence etc. While all the cylinders are spray-painted
with a signal red colour. BPC cylinders have yellow ring around the bung. HPC cylinders in blue ring
and IOC cylinder are fully red.
Technical aspect:
i. Process of Manufacture:
The LPG cylinders are manufactured as per the BIS specification number 4093-1967 with
necessary amendment. To manufacture LPG cylinders first sheet is cut to size on cutting machine to
make blanks. These blanks are now deep drawn on deep drawing power press to two halves of the
cylinder. Other parts such as foot ring, backing strip, top ring and turned components are
manufactured separately. Now both the halves are joined with a backing strip prior to their welding.
After welding complete cylinder undergo stress relieving normalizing process in suitable heat
treatment furnaces. After stress relieving sand blasting is done. The following tests are carried out
during the process of manufacturing of the LPG cylinder:
Quality checks, visual hydraulic and pneumatic tests for pressure, stretch and bursting etc. are done.
Finally, cylinders are marked, cleaned and painted with high gloss corrosion resistant paint/ coating
etc.
QUALITY STANDARD:
LPG cylinders are manufactured as per BIS Standard No. 4093-1967 with latest amendment.
The working pressure should be 16.87 kg/cm2 at 148o F. A cylinder has 33.3 liters of water capacity
and its weight ranges from 15 kgs, 17.8 kgs approximately. The cylinders are tested at a pressure of
25.31 kgs/cm2. Further it is suggested to refer to the following standards also.
1. IS: 1870-1970 – Class-I valve pad or bung.
2. IS: 1079-Foot ring and backing strip
3. IS: 3224- Valve
4. IS: 3737-Part-2 Self Closing valves.
PLANT & MACHINERY:
Sl.No. Description
Motorized guillotine sheet shearing machine cap. 2000 x 4 mm.
complete with 7.5 HP electric motor & accessories, complete with
1
blocks, broaches, front and backside gauges, sheeting holding device
starter etc.
Power operated circle cutting machine to cut sheet up to 3.15 mm
(10 SWG) and blank up to 36” complete with 3 HP electric motor
2
and accessories, pulley, belt, stand, motor attachment, reduction gear
etc.
Double action deep drawing power press 400 tones capacity to draw
3
shell up to 450 mm deep complete with electric fittings etc.
Power press 100 tones capacity complete with 7.5 HP electric motor
4
and accessories.
5 Trimming machine to trim off edges of drawn pieces.
Submerged Arc welding machine complete with all the accessories
6
electric fittings etc.
Arc welding machine 400 amps with 21 KVA air-cooled complete
7
with all the accessories.
Stress relieving furnace oil fired 5700 mm x 1400 mm x 450 mm
8 complete with blower, pipeline temperature control equipment etc.
with 5 HP electric motor and all accessories.
Sand blasting machine 36”x36”x31” size complete with motor
9
electrical fittings etc.
Air compressor 200 CFM capacity complete with motor electrical
10
fittings etc.
11 Spray-painting gun complete with all the accessories.
Backing oven 15’x8’x4’ size complete with electrical heating fitting
12
and accessories.
Powers press 75-tone cap. Complete with 5 HP electric motor &
13
accessories. No. of stroke 45, Bed area 510x560 mm.
14 Valve fixing machine
15 Weighing machine/ platform 500 Kgs.
16 Zinc metallising plant
Lathe machine 10’ bed length admit between centres 84” complete
17
with 3 HP electric motor and starter etc.
Lathe machine 6-6” bed length admit between centers 38” center
18
height 12”complete with 2 HP electric motor and starter etc.
Double ended bench grinder 250 mm wheel size complete with 1 HP
19
electric motor and accessories.
Geared drill machine 1 ½ cap. With 2 HP electric motor &
20
accessories.
Testing Equipment:
Brust testing machine
Universal testing machine
Hydraulic testing machine
RAW MATERIALS
Sl.No. Particulars
Deep drawing quality sheet 3.15
1
mm thick
2 Valve
3 Bung
4 Ring Upper
5 Bottom foot ring
6 Packing material
Flow chart for manufacturing of LPG CYLINDER
MACHINERY REQUIRED FOR MANUFACTURING
Motorized guillotine sheet shearing machine
Power operated circle cutting machine
Double action deep drawing power press 400 tones
Power press 100 tones capacity
Trimming machine
Submerged Arc welding machine
Arc welding machine 400 amps with 21 KVA
Stress relieving furnace oil fired
Sand blasting machine
Air compressor 200 CFM
Spray-painting gun
Backing oven
Powers press
Valve fixing machine
Zinc metallising
Lathe machine 10’ bed length admit between centres 84”
Lathe machine 6-6” bed length admit between centre 38”
Double ended bench grinder 250 mm wheel size
Geared drill machine 1 ½ cap
Testing machines
Brust testing machine
Universal testing machine
