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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...

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...

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?

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...

Hi all I have little confusion for provision of slot holes in lug support for vertical vessel. First, I want know provision of slot holes is must or not? Incase, if slot holes are provided in lug support, which basis are followed to calculate the circumferential expansion for vertical...

Dear all, I have little confusion for provision of slotted holes in lug support for vertical vessel.First, iwant know the provision of slotted holes in lug support is must or not? Incase, if slotted holes are provided in lug support which basis are followed to calculate the...

Dear all, I have doubt in saddle analysis. I know my question is very silly. But.... Normally horizontal vessel supported on saddle. One is fixed and another one is sliding saddle. Why both saddle should not be sliding.

Dear all, I am vinoth. I am working in oil and gas field (especially pressure vessel design) and I am new in engg-tips. I have doubt in selection of manway size. For example,the vessel ID 1400 mm.shall I go to select the manway size 24inch or 20 inch. Basically which basis are followed...

Hi all As per UG-36(b)1, vessel id 60" or less than, the manway does not exceed 20".but if the manway exceed the 20" calculation as per appendix 1-7 need to be followed. while doing analysis in PV-ELITE, how to guide the software to proceed with the calculation as per appendix 1-7...