Recent content by MirjafariSM

Thank You Duwe6/metengr our boiler has been in service for 2 years. we are sure that there is leakage from tube-tube sheet joint. I agree with Duwe6, we have to consider seal welding.

Hi Dears We have a 10 ton fire tube boiler with 7bar pressure. 8 tubes have some leakage in tube to tube sheet joint. We expanded them but it did not solve our problem! How many times we can expand tubes?! Can we do hydraulic test several times? (If the answer is yes, with which pressure and...

Thanks all Our licensor in his material selection approved both Brass(Naval and Admiralty for some cases) and also Approved Duplex material instead them. We want to buy those equipment(Shell and tube heat exchangers)and need some information to sellect Duplex or Brass base material.

Our media are(H2,H2O,H2S,HC,N2) and (H2,N2)

Hi all I am not sure , but as you know cold forming generate some low carbon martensite that they are very magnetic. if your part after forming have a magnetic behavior, you shall consider it and if your media is dangerous (H2S or Amie or same as that ,or occurs ssc or scc)you have to follow...

Hi Dears Please read the follow technical matter: If we have cladded plate, we have to done weld overlay in junction. for testing chemical composition of weld overlay ,in our specification, we have to take a sample from 3/4 weld overlay thickness. as you know generaly overlay THK. is greater...

Hi all I have a question ! I want to know about corrosion resistance of naval and admiralty brass and Duplex materials. can someone compare those two group? I know that Temp. and media is important for corrosion ,but i want to compare them roughly! thank you.

I told in my question. I am talking about a unit (RHU) and we have several equipments with difference service. But I know that there are some amine media and other service that we have to follow NACE MR0103 in some equipment. (H2S service)

Thank you Jason but can you tell me which factor is critical for design and select 1-2 or 4 path trays?

Thank you but please tell me more explanation. Which item is (more) critical? -Media -Material -Temp. -Old or new unit

Hi dears Generally,Is pickling and passivation in mandatory for all new unit? we have some new unit with amine or other media that include H2S!!

Hi Dears Is hardness test necessary for welding area(HAZ) of none pressure parts such as Column internals, trays etc? (Our applicable standards are ASME SEC VIII,IX and NACE -MR0103)

Hi Dears I want to know what the number of "path for trays" is? what dose it related to? Best Regards

Hi all I have some questions. -if we have 2 phases in output, do we need a safety factor for area calculation? -is it as a bug in HTRI software? (Our condition high Pressure and high temperature) Best Regards

Hi Dear You shall see API 5L standard. http://www.4shared.com/file/84924094/7252577c/API_5L_-_Ed_2004.html