In WDRVM we always check the newly arrived material in the most possible restrict manner to ensure the high quality and conforming to applicable standards.
Our Quality Control Specialists do this checking process and forward the accepted items into storage.
Accepted raw materials are stored in well-prepared areas as per their types and chemical composition.
In WDRVM we have a cutting-edge technology using plasma and oxyfuel CNC cutting process, so cutting plates and beveling them become more reliable and accurate, we also use cold beveling when required.
Pipes beveling is also performed using special cold beveling tools.
Beveled plates are rolled into conical or straight cylindrical shapes using a 4-cylinders rolling machine that can roll plates up to /4000 mm/ in diameter and /85 mm/ in thickness based on approved manufacturing drawings and using pre-prepared radius measuring gauges. The edges are carefully aligned to ensure that ends meet properly. Tack-weld is performed after the completion of the rolling process and ensuring that opposite edges are aligned properly. Our certified welders do tack-welding using GMAW process to link edges and ensure exact dimensions.
The whole rolling process is controlled by a quality control inspector who checks dimensions after rolling and accepts or refuses the shells based on drawing and applicable acceptance criteria.
Preparing for welding, we always putting shells on adjustable roller beds so we can align shells properly before fitting them up using GMAW process and then can perform SAW welding in a flat position.
fitting up nozzles and the whole assembly are led by our experienced fitter who is responsible for the fabrication and fitting of pressure vessels in accordance with our company fabrication drawings and applicable standards while ensuring a Zero Harm work environment.
We in WDRVM use automatic submerged arc welding (SAW) as the main welding process to ensure high productivity and perfect welding for large thicknesses.
| SAW column and boom type | |
| Number of working heads | 1, 2, or 3 welding heads can be used to produce various welding joints |
| Current |
up to 1250 DC/ 800 AC |
| Diameters | Up to 6 Meters |
| Longitudinal joints length | Up to 6 Meters |
Longitudinal and Circumferential shell joints welding is done by highly trained and certified SAW operators.
Nozzle-flange/shell/head welding is very important as well, we ensure high-quality welds with our GMAW, SMAW, and GTAW highly skilled certified welders.
The whole manufacturing process is supervised by experienced engineers and monitored by QC inspectors who ensure adhering to approved welding procedures specifications WPSs that we’ve already prepared.
In addition to in-stage checks for dimensions, fitting up and assembly, every welding joint is going through Non-destructive tests that includes the main NDT well-known methods (VT, UT, PT, and MT) as well as additional tests as needed based on applicable codes and customer request.
Blasting is done in our blasting area. Sand is the usual abrasive material we use to clean steel surfaces from rust and produce the required roughness.
The painting process is the final stage before packaging. It is a very important step as the painting is the first protection for the vessel from corrosion.
Because of all the mentioned above, we in WDRVM pay a high caring to this stage. Every painting process is done as per prepared procedures vary from one project to another. Our certified painting inspector monitors the whole painting process from preparing surfaces, through paint mixing ratios, coating thicknesses, and other tests.
