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Hi All, This is first time I am handling Pig Traps systems. As i understood that the Balance line is branch connection taken from Kicker line and connected on minor barrel of the Pig launchers as close as possible to Pig trap valves. Normally this balance line connection used for filling and...

Hi all, I have one clarification on selection of Flange rating. Normally for Standard Flange (ASME B16.5), we select the Rating based on design conditions(design pressure and Design temperature) only. But, My vendor select the flange rating based on total required bolt area calculation as per...

Hi all, I am new for Gasket type plate and Frame Heat Exchanger. Regarding the minimum wall shear stress, I have one issue with my vendor. As per my client specification, my Vendor need to achieve the wall shear stress as minimum of 75Pa within the allowable pressure drop of 0.6bar. Now, my...

Hi ALL, I have confusion on reinforcement pad limitations. I had evaluated that Nozzle RF Pad thickness is higher than the shell thickness due to Nozzle WRC Loads, but my client Specification says, the RF pad thickness should not exceed than the shell thickness. But in dennis moss page no.96...

Hi All, I have confusion on Heat treatment(stress relief) due to straining. My PV-ELITE report shows fiber elongation is 7%. vessel material is SA 240 UNS S31803. DSS material required Heat treatment(stress relief) or not? If YES means, which section i want to consider. Please advise to me.

Hi all, I have some confusion on minimum required thickness of pressure vessel as per ug-16(b), which state that the minimum required thickness for unfired steam boiler and compressed air service or water service is 6 mm and 2.5 mm. But my vessel is used for curde oil service. so, which...

Thanks Mr.snTman

Sir, i need clarification on category C weld in nozzle. In my understanding the nozzle size is grater 10 inch or 29mm wall thickness, radiography is not required on category C weld in nozzle. My understanding is correct or not. Please clarify me.

Thank you Mr.A.I.BP. I have another doubt on radiography. As per ASME Section VIII Div-I UW-11 (a)(4), category B and C welds in nozzles that neither exceed NPS 10 nor 29mm wall thickness do not require any radiographic examination. Recently i reviewed one mechanical GA drawing for surge...

Dear all, I need some clarification on UW-3 weld joint category. what type of category at the location of nezzle neck connecting with flange(W.N.R.F - weld neck raised face) Thank you all.

Dear all, I am very much interested on Thermal calculation for shell and tube heat exchangers. Basicaly i am working as mechanical engineer in oil and gas field. If any hand book available for shell and tube exchangers, please let me know. Thank you all.

Dear all, Now i am designing one horizontal vessel. The design pressure is Full of Water. The Dimension of the vessel is 3150(I/D) and 6500(T/T). i was calculate the design pressure by using the formula of P=(dendity of water X 9.81 X 3150) and and i get the value of design pressure is...

ASME SEC VIII DIV-I

Dear All, As per code or good engineering practise, what type of test to be conducted on vessel before and after the Postweld Heat treatment?

Thank you Mr.JohnGP.

for example i was consider the plate material is SA-516 Gr70. so, what is the maximum limitation of Carbon equivalent(CE) value. 0.14% or 0.40%

Dear All, As per ASME SEC VIII DIV-I Table UCS 56-1 General Notes (b)(2), For weld joints over 32mm nominal thickness to 38mm nominal thickness unless preheat is applied at a minimum temperature of 95 degree Celsius during welding.This preheat is not be applied to SA841 grades A and B...

Dear all, Any one please explain what is P.No and Group No? why the materials are classified under P.no and Group No and which basis are followed?

Dear all, I am vinoth. I have one doubt. In ASME SEC VIII DIV I UG-28(C), some procedure is given for calculating the required minimum thickness of cylindrical shell (or) tube under external pressure,either seamless (or) with longitudinal butt joints. If the cylindrical shell have...

Vessel ID 1200mm,Tan to Tan 2400mm, material SA516 Gr70 and Design temperature is 300 degree Celsius