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  1. blaluq

    ABP 44-70 marking on screw head

    Hi, I have a M6 screw showing the following markings on its head: ABP 44-70 Does anybody know what does this mean? Thank you everyone Ciao!
  2. blaluq

    Air cooled Heat pump Fan behaviour

    I have measured air flow in an air cooled heat pump in summer season and winter season, and I have found that air flow is much greater in winter than in summer (2200 m3/h in summer vs 3700 m3/h in winter), when I've always thought it was the opposite. I believed it was much higher in summer...
  3. blaluq

    stelliting?

    Some time ago I had a job at an oil refinery in a polythene plant in Spain, they used stellite in a lot of parts to prevent erosion , in machines with severe use, such as extruders, mixers, stirrers, valves and so on. Stellite gave us a lot of problems in severe conditions and high...
  4. blaluq

    Welding 316 SS to Copper

    We are at small workshop in Spain producing parts for special HVAC equipment and need to weld copper tubes to 316 plates for water condensate removal. We are used to solder copper to copper with silver as well as welding plates of galvanised steel. I think that SS cannot welded to copper using...
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