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  • Users: cal6404
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  1. cal6404

    EN 10204 vs USP class VI

    Hi, I am wondering if EN 10204 2.1, 2.2 and 3.1 cover tractability. for example, if we have a diaphragm and we wanted to one day trace it as there was a quality issue, could these certificates allow us to know exactly where it came from and what manufacturing batch? Also, is USP class VI the...
  2. cal6404

    EN1092 vs DIN2635

    I have purchased an expensive piece of equipment from Europe but there seems to be multiple standards used for the different connections. Is DIN2635 PN40 identical to EN1092-1/11 B1 PN40? I had a look at two spec sheets and the sizes look the same What is EN1092? Is that just and update on...
  3. cal6404

    Poor Condenser performance

    Hi, We have a large steam condenser that is running poorly! The problem: 1) the condenser steam inletcontrol valve goes to 100% 2) the condenser fills with water 3) the outgoing water line that is being heated drops in temperature (because the condenser is full of water) 4) When I open the...
  4. cal6404

    High size usage - ASA

    Hi, We seem to be using a lot more sizing agent to achieve target cobb than normal. Can't figure out why. If anyone else has experienced high size usage (we use ASA) then let me know what you did to bring it back down to target. Kind regards
  5. cal6404

    pH question

    Hi, I haven't done chemistry in a long time so this is probably quite basic but I just want to check my working for a pH problem: There are two streams that enter a mixing tank. Stream 1 flows at 92 m3/d and has a pH of 11. Stream 2 flows at 105.6 m3/d and has a pH of 2.45. I need to know what...
  6. cal6404

    Design of a mixing tank

    Hi, On our site we have an existing mixing tank. At the moment, the impeller is too aggressive and breaks downn the suspended solids into a size that is too fine for downstream processing. The mechanism for reduction is most affected by macromixing (overal mixing in the tank and not shear...
  7. cal6404

    Alter exisitng heat exchanger conditions

    Hi, I've been asked to examine the theoretical output conditions of an existing HEX if the cold side input flow and temperature were to change. I've simply used a temperuate gun on the HEX while it's been running to get the stream temperatures. The flows are recorded by flow meters. It only...

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