“AMAR” uses centrifugally casted stainless steel pipes for manufacturing of suction shell of different grades i.e. deplex/SS 304/SS 410.
Material with high content of chromium and nickle, and often molybdenum offers good resistance to localized and uniform corrosion
The stainless steel microstructure contributes to the high crack resistance caused by stress corrosion. The high yield stress of stainless steel also implies high fatigue strength
We evaluate drilling patterns of the suction shells to avoid jeopardize the mechanical resistance, eliminate “shadow marking” , improve dewatering and reduce noise level.
The Shell is drilled by the gun-drilling process on high speed European fully CNC machine, which results in significant improvement in the surface finish of the holes and accurate patterns.
Gun drilling is the most reliable and precise technology for drilling of new stainless steel suction shells: in particular it is the only technology able to grant a superior drilling quality for high thickness suction shells, in our case until 100 mm wall thickness. The quality of drilling, especially for suction shells subject to severe operating conditions, does not only translate into a geometrical or visual factor, but is of paramount importance for the stability of the shell and to ensure the absence of defects which might jeopardize the integrity of the shell itself over time.
The main distinctive features of gun-drilling are:
| Diameter | Length |
|---|---|
| Up To 1200 mm | 5000 mm |
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