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Hi Dear all, I am little bit confused with Constant Effort spring support and Variable Effort Spring support. What is basic difference between these? What is the selection criteria.

Dear all, I need to procure a sulphuric acid( Strength 98%) centrifugal pump. But the problem is that as per API 610 8th edition Table - G.1 and Table H-1, for sulphuric acid strength > 85% , the pump material class is S-1,(i.e. CS pressuer casing, CI impeller, CI inner case parts etc) and for...

Dear all, Thanks for your valuable suggestions. Usually I prefer design Pressure and Temperature 10%-20% above operating conditions considering the criticality of service fluids. PRESSURE VESSEL CODE ASME SECTION -VIII DIV-1 suggest factor of saftey as 4. I think same can also be applicable in...

What should be the design pressure and design temperature in pressure piping system with hydrocarbon services? I went through ANSI 31.3 B, but it does not clearly say anything about it.Is there any thumb rule if operating pressure and temperature is known?

API619 does not mention motor KW rating calcualtion at rated capacity of Screw compressors. Is there any other codes/standards/formula for calculatrion.

Dear all, Thank you all for your valuable suggestions. Shell / dome Mateial of construction as under Dome : Thickness 25 mm 516 GR-70 : Ellipsoidal ratio 2:1 Shell : Thickness 14 mm 516 GR-70 Dear WELDTEK, could you suggest little more?

Recently we came across a big problem.Fabricated dome and shell dia got mismatched. Fabricated Ellipsoidal dome id 3476 mm Fabricated Shell id 3400 mm Kindly help me with possible solution.