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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...

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.

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 all I have some question. What is Step cooling test? When it is mandatory? Is there any standard for it? Beat Regards

Hi all I have some high pressure vessels that designed with ASME Sec.VIII Div.2. According to ASME, RT is mandatory for all welding joint. You know that RT is very difficult (especially in Category D Joints). -Can we replacing RT with PAUT test in category D? -Can we replacing RT with TOFD in...

Hi all i have a question. as u know for A.S.S. generally acid cleaning done for degreasing and etc. some of my vendors tell me that for 410ss, mechanical cleaning is better and they don't suggest acid cleaning for this type of steel. are they true? what is the reason? best regards

Hi dears i have a question . what is the PMI test normaly acceptable tolerance? (in copmare with astm or other standards)

hi all i have a question about Engineering Drawing. -what are the minimum Datas that shall be in Engineering Drawing of Drums or Pressure vessels? is nozzle orientation or detail of some internal equipment such as tray support or baffle is necessary? thankx all