eficcient

In manufacturing welded steel pipes, a continuous forming process is used by the Electric Resistance Welding (ERW method).

To fulfill the compromise in offers trusty products, it has been established rigorous test and inspections through all the productive process.

Raw materials used at PROCASA for piping is hot rolled steel coil fabricated under verification along the factory. Quality control start in the reception of raw material, which is inspected visually and under laboratory and metallurgy test to verify dimensional accuracy and achievement of established norms.

In the first stage, the rolled steel goes into the cutter line ( Slitter ) to refine its sides, in order to get the desired width for development of pipe and to have a clean side out.

FORMING THE PIPE...

		Next the prepared roll passes the forming unit where pipe is cold formed by rolling mills in various orderly steps, then the welding unit applies a current of 600 kW to it.

INSPECTING THE PIPES...

Immediately after welding, during the forming process pipes are inspected a hundred per cent using ultrasonic equipment and heat treatment controlled by pyrometers and information is recorded by plotters.

DUCTILITY PROPERTIES

		In order to restitute ductility properties to sections affected during welding, a heat treatment is applied in temperatures ranging from 870 C ( 1600 F ). as minimum.

FLATTENING TEST

After the pipe already formed is inspected visually and dimensionally, cuts are made in the ends to test flatten and verify material and welding.

SUBSEQUENT STEPS

Subsequent steps gives piping, Sizing, straightening, cutting in its extremes for square and beveling, as well as a Hydrostatic test before final inspection. The hydrostatic test is controlled by timers and pressure meters, then the whole piping production is inspected by ultrasonic equipment to assure quality according to requirements established by international norms.

QUALIFIED PERSONNEL

Active participation of PROCASA's personnel in implementing a Quality assurance System has led the company products to a high level of competition all over the world

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