Internal mechanical blasting
In the internal mechanical blasting process the pipe surface is blast cleaned with dry-grit using a blast lance system. A highly concentrated stream of steel abrasive particles is projected at the surface. The goal is to remove rust, mill scale and contaminations in order to create the correct cleanness and surface roughness profile, beneficial for coating adhesion.
Solution:
For inside pipe diameters of 210 mm and larger Selmers uses a hydraulic driven turbine wheel mounted on the tip of a lance which moves inside the pipe. A dust filter system generates a large airflow though the pipe to remove dust and abrasive materials out of the pipe.
Key Features:
- Suitable for pipe diameters as small as 210 mm. (typically such small diameters are processed with pneumatic blasting, which is less efficient and has higher operational costs).
- Special ‘centipede’ system for larger pipe diameters to save on filter capacity requirement and energy consumption
- Optimum filter system for low dust levels and lower abrasive material consumption
- 3 different sizes of blast lances/heads for a dedicated pipe diameter range and optimum capacity
Benefits:
- High production speeds
- High pressure ventilator(s), with constant flow, independent of filter load
- All blast heads are hydraulic driven
- Fully automatic pipe pendle compensation system on rotation unit
- Electronic grit valve for more accurate and on the fly grit adjustment (optional
How It Works:
The blasting process is executed with abrasives while the pipe is situated on rotation units. Where-as the actual blast process is carried out by means of a blast lance which is introduced in the pipe. During this process the rear- and front pipe-end are positioned into enclosure cabins allowing airflow and preventing escape of abrasives, dust and debris. The abrasives can be grit, shot or a mixture in varying sizes and hardness. The abrasives are led from an abrasive bunker to the blast wheel thru abrasive valves, controlling the amount of abrasive. Surface cleaning is than accomplished by high power mechanical blast wheels accelerating abrasives with high impact against the pipe surface.
The blast system comes c/w abrasive recycling and cleaning system. Used abrasives are collected in a closed loop system by means of a screw and bucket elevator. During cleaning, dust and debris are separated from the re-usable abrasives. The dust filter retracting dust-loaded air from the blast cabin is also generating airflow for cleaning the abrasives.
The Full Scope:
- Rotation units
- Dust collecting system
- Front & end cabins
- Abrasive reclaim system
- Blast lance & drive buggy
- Electrical control system
Product Range:
- Internal pipe diameter range of 210 – 3,200 mm
- Pipe lengths up to 25.6 mtr.
- Suitable for steel pipes such as ERW pipes, LSAW and SSAW pipes. Seamless pipes with special precautions.
Specific Solutions:
Filterable Properties:
At Selmers, we specialize in advanced industrial machinery and automation for coating and handling pipes and tubes. With over 50 years of experience, we have grown into a trustworthy supplier of numerous automated solutions. Collaboration is key to creating real magic. Interested in optimizing performance and reducing risks?
