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  1. Ingeniarius

    Sodium hypochlorite

    Thank you for your answers. You helped me a lot. After surfing the web, consulting some books and carefully reading what you wrote, I came to conclusion: Sodium hypochlorite disociate to Na+ and OCl- ions in water. If solution is acidic (ph<7) folowing reaction starts: Ocl- + H2O = HOCl + OH-...
  2. Ingeniarius

    Sodium hypochlorite

    Dear friends, Can you explain to me one thing that has been bothering me for a long time. If household bleach like Domestos is made as solution of sodium hypochlorite in water then, according to my knowledge sodium hypochlorite cant be its ingredient, since it decomposes almost immediatelly into...
  3. Ingeniarius

    Could DIN flange be made as socket weld

    Dear micalbrch, socket weld flange is special type of flange. I attached schematics of flange types to avoid misunderstanding. regards, Ingeniarius http://files.engineering.com/getfile.aspx?folder=674e2956-b058-4204-9a44-8b6e65cbfc57&file=Flange_types.pdf
  4. Ingeniarius

    Could DIN flange be made as socket weld

    Dear micalbrch, socket weld flange is special type of flange. I attached schematics of flange types to avoid misunderstanding. regards, Ingeniarius
  5. Ingeniarius

    Could DIN flange be made as socket weld

    Dear colleagues, in several places I have found that flange manufacturers offer socket weld flanges made in DIN standard. I went through DIN standard and couldn't find socket weld flange. It seems to me that socket weld is available only in ANSI (ASME), but not in DIN, although it is obvious...
  6. Ingeniarius

    Pump affinity laws

    Dear colleagues, why do we find two different sets of pump affinity laws in literature and on the web: One set is correct (according to my knowledge) and says that for constant shaft speed the following is true Q1/Q2=D1^3/D2^3, H1/H2=D1^2/D2^2 and P1/P2=D1^5/D2^5. The other set of laws that is...
  7. Ingeniarius

    Flanged joint between precision tube and pipe

    Dear colleagues, can you help me solve the problem of joining OD 70 precision steel tube with 3" (DN 80) steel pipe with flanges. It is easy to choose flange for 3" pipe, but what about flange for OD 70 tube - should it be custom made to fit to ansi pipe flange?

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