The Sigma Process

The following offers a step-by-step breakdown of our manufacturing process.

Step 1 - Coil inspection and storing

 

The steel coils are placed on the decoiler and then straightened.

Step 2 - Disc Cutting

 

The straightened steel is cut into discs by a 600 ton press.

Step 3 - Logo Embossing

 

The company’s name, logo and year of production are embossed on the disc which is only visible on the upper part of the cylinder.

Step 4 - Deep Drawing

 

The deep drawing hydraulic press transforms the disc into a shell.

Step 5 - Edge Trimming

 

It is then trimmed at the edge.

Step 6 - Cleaning

 

The edge is then cleaned to ensure quality output for the welding process.

Step 7 - Joggling

 

Only the shell which is yet to become the lower part of the cylinder is joggled. In other words, a groove is created on the edge. This in turn allows the upper shell to fit properly onto the lower shell prior to the middle welding stage.

Step 8 - Punching

 

The upper shell is then punched in the center in order to create an opening area for the necker to be welded.

Step 9 - Footring Welding

 

The foot ring is welded on the lower shell, which acts as the base of the cylinder.

Step 10 - Necker Welding

 

The necker is welded on the upper shell.

Step 11 - Handle Welding

 

The handle is then welded on the upper shell.

Step 12 - Circumferential Joints Welding

 

The lower shell and the upper shell are combined and welded at the circumference yielding the full shape of the cylinder as a single unit.

Step 13 - Heat Treatment

 

The cylinder is then treaded in the annealing furnace which has a temperature range of 800 to 900 degrees Celsius. This is done to re-obtain the appropriate chemical and mechanical composition of the steel which was alternated during the welding process.

Step 14 - Hydrostatic Testing

 

The cylinder is pressure tested with water at 30 bar (7 times more than the normal pressure of a filled LPG cylinder) in order to investigate any leaks or possible defects resulting from the welding process.

Step 15 - Shot Blasting

 

The cylinder is then shot blasted, cleaning the surface from all residues and preparing it for the coating process.

Step 16 - Paint Coating

 

The second coat is the color coat which varies depending on the client’s request.

Step 17 - Valve fixing

 

The valve is fixed properly into the necker of the cylinder.

Step 18 - Valve Testing

 

As a final step, the valve is tested for leaks, this is achieved by filling the cylinder through the valve with air at a pressure of 8 bar.

CONNECT WITH US

GET IN TOUCH

Copyright © Sojafric Industries Limited 2018

Powered by Meshan-ad Consult

+233 278 352 534

+233 244 257 888

NORTH INDUSTRIAL AREA, DADEBAN ROAD 124 LINK, ACCRA NORTH

 

P. O. BOX PMB ACCRA-NORTH, ACCRA

The Sigma Process

The following offers a step-by-step breakdown of our manufacturing process.

Step 1 - Coil inspection and storing

 

The steel coils are placed on the decoiler and then straightened.

Loading...

Step 2 - Disc Cutting

 

The straightened steel is cut into discs by a 600 ton press.

Step 3 - Logo Embossing

 

The company’s name, logo and year of production are embossed on the disc which is only visible on the upper part of the cylinder.

Step 4 - Deep Drawing

 

The deep drawing hydraulic press transforms the disc into a shell.

Step 6 - Cleaning

 

The edge is then cleaned to ensure quality output for the welding process.

Step 5 - Edge Trimming

 

It is then trimmed at the edge.

Step 7 - Joggling

 

Only the shell which is yet to become the lower part of the cylinder is joggled. In other words, a groove is created on the edge. This in turn allows the upper shell to fit properly onto the lower shell prior to the middle welding stage.

Step 8 - Punching

 

The upper shell is then punched in the center in order to create an opening area for the necker to be welded.

Step 9 - Footring Welding

 

The foot ring is welded on the lower shell, which acts as the base of the cylinder.

Step 10 - Necker Welding

 

The necker is welded on the upper shell.

Step 11 - Handle Welding

 

The handle is then welded on the upper shell.

Step 12 - Circumferential Joints Welding

 

The lower shell and the upper shell are combined and welded at the circumference yielding the full shape of the cylinder as a single unit.

Step 13 - Heat Treatment

 

The cylinder is then treaded in the annealing furnace which has a temperature range of 800 to 900 degrees celsius. This is done to re-obtain the appropriate chemical and mechanical composition of the steel which was alternated during the welding process.

Step 14 - Hydrostatic Testing

 

The cylinder is pressure tested with water at 30 bar (7 times more than the normal pressure of a filled LPG cylinder) in order to investigate any leaks or possible defects resulting from the welding process.

Step 15 - Shot Blasting

 

The cylinder is then shot blasted, cleaning the surface from all residues and preparing it for the coating process.

Step 16 - Paint Coating

 

The second coat is the color coat which varies depending on the client’s request.

Step 17 - Valve fixing

 

The valve is fixed properly into the necker of the cylinder.

Step 18 - Valve Testing

 

As a final step, the valve is tested for leaks, this is achieved by filling the cylinder through the valve with air at a pressure of 8 bar.

Loading...

CONNECT WITH US

GET IN TOUCH

Copyright © Sojafric Industries Limited 2018

Designed by Meshan-ad Consult

+233 278 352 534

+233 244 257 888

NORTH INDUSTRIAL AREA, DADEBAN ROAD 124 LINK, ACCRA NORTH

 

P. O. BOX PMB ACCRA-NORTH, ACCRA

Loading...

The Sigma Process

The following offers a step-by-step breakdown of our manufacturing process.

Step 1 - Coil inspection and storing

 

The steel coils are placed on the decoiler and then straightened.

Step 2 - Disc Cutting

 

The straightened steel is cut into discs by a 600 ton press.

Step 3 - Logo Embossing

 

The company’s name, logo and year of production are embossed on the disc which is only visible on the upper part of the cylinder.

Step 4 - Deep Drawing

 

The deep drawing hydraulic press transforms the disc into a shell.

Step 6 - Cleaning

 

The edge is then cleaned to ensure quality output for the welding process.

Step 5 - Edge Trimming

 

It is then trimmed at the edge.

Step 7 - Joggling

 

Only the shell which is yet to become the lower part of the cylinder is joggled. In other words, a groove is created on the edge. This in turn allows the upper shell to fit properly onto the lower shell prior to the middle welding stage.

Step 8 - Punching

 

The upper shell is then punched in the center in order to create an opening area for the necker to be welded.

Step 9 - Footring Welding

 

The foot ring is welded on the lower shell, which acts as the base of the cylinder.

Step 10 - Necker Welding

 

The necker is welded on the upper shell.

Step 11 - Handle Welding

 

The handle is then welded on the upper shell.

Step 12 - Circumferential Joints Welding

 

The lower shell and the upper shell are combined and welded at the circumference yielding the full shape of the cylinder as a single unit.

Step 13 - Heat Treatment

 

The cylinder is then treaded in the annealing furnace which has a temperature range of 800 to 900 degrees celsius. This is done to re-obtain the appropriate chemical and mechanical composition of the steel which was alternated during the welding process.

Step 14 - Hydrostatic Testing

 

The cylinder is pressure tested with water at 30 bar (7 times more than the normal pressure of a filled LPG cylinder) in order to investigate any leaks or possible defects resulting from the welding process.

Step 15 - Shot Blasting

 

The cylinder is then shot blasted, cleaning the surface from all residues and preparing it for the coating process.

Step 16 - Paint Coating

 

The second coat is the color coat which varies depending on the client’s request.

Step 17 - Valve fixing

 

The valve is fixed properly into the necker of the cylinder.

Step 18 - Valve Testing

 

As a final step, the valve is tested for leaks, this is achieved by filling the cylinder through the valve with air at a pressure of 8 bar.

CONNECT WITH US

GET IN TOUCH

Copyright © Sojafric Industries Limited 2018

Designed by Meshan-ad Consult

+233 278 352 534

+233 244 257 888

NORTH INDUSTRIAL AREA, DADEBAN ROAD 124 LINK, ACCRA NORTH

 

P. O. BOX PMB ACCRA-NORTH, ACCRA

The Sigma Process

The following offers a step-by-step breakdown of our manufacturing process.

Step 1 - Coil inspection and storing

 

The steel coils are placed on the decoiler and then straightened.

Step 2 - Disc Cutting

 

The straightened steel is cut into discs by a 600 ton press.

Step 3 - Logo Embossing

 

The company’s name, logo and year of production are embossed on the disc which is only visible on the upper part of the cylinder.

Step 4 - Deep Drawing

 

The deep drawing hydraulic press transforms the disc into a shell.

Step 5 - Edge Trimming

 

It is then trimmed at the edge.

Step 6 - Cleaning

 

The edge is then cleaned to ensure quality output for the welding process.

Step 7 - Joggling

 

Only the shell which is yet to become the lower part of the cylinder is joggled. In other words, a groove is created on the edge. This in turn allows the upper shell to fit properly onto the lower shell prior to the middle welding stage.

Step 8 - Punching

 

The upper shell is then punched in the center in order to create an opening area for the necker to be welded.

Step 9 - Footring Welding

 

The foot ring is welded on the lower shell, which acts as the base of the cylinder.

Step 10 - Necker Welding

 

The necker is welded on the upper shell.

Step 11 - Handle Welding

 

The handle is then welded on the upper shell.

Step 12 - Circumferential Joints Welding

 

The lower shell and the upper shell are combined and welded at the circumference yielding the full shape of the cylinder as a single unit.

Step 13 - Heat Treatment

 

The cylinder is then treaded in the annealing furnace which has a temperature range of 800 to 900 degrees celsius. This is done to re-obtain the appropriate chemical and mechanical composition of the steel which was alternated during the welding process.

Step 14 - Hydrostatic Testing

 

The cylinder is pressure tested with water at 30 bar (7 times more than the normal pressure of a filled LPG cylinder) in order to investigate any leaks or possible defects resulting from the welding process.

Step 15 - Shot Blasting

 

The cylinder is then shot blasted, cleaning the surface from all residues and preparing it for the coating process.

Step 16 - Paint Coating

 

The second coat is the color coat which varies depending on the client’s request.

Step 17 - Valve fixing

 

The valve is fixed properly into the necker of the cylinder.

Step 18 - Valve Testing

 

As a final step, the valve is tested for leaks, this is achieved by filling the cylinder through the valve with air at a pressure of 8 bar.

CONNECT WITH US

GET IN TOUCH

Copyright © Sojafric Industries Limited 2018

Designed by Meshan-ad Consult

+233 278 352 534

+233 244 257 888

NORTH INDUSTRIAL AREA, DADEBAN ROAD 124 LINK, ACCRA NORTH

 

P. O. BOX PMB ACCRA-NORTH, ACCRA