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Hi folks Just a quick question please. I have a tubesheet which is ASTM A350 LF2 Class 2 forging. Tubes are A334 Grade 6 material, 2.11 mm wall thickness. Design temperature is minus 46 degrees centigrade. Could anyone please point me to specific PWHT or local heat treatment requirements for...

Hi folks, I have just been tasked with trying to locate and specify a reinforcing spider stiffener to be placed inside a barrel (860 mm ID) to which we are welding a 20" NB nozzle. We intend leaving the shell material in place and welding the 20" nozzle as a "set on" feature and then cutting...

Hi folks, Thank you all for the advice. I think the answers generally told me what I already suspected and offered some good advice - especially in the areas not covered by the codes relating to non-pressurised welds. In response to JTSeng123, we intend to perform a PWHT at 600 deg C for a...

Kiwi, Thank you for your reply. The question is not about whether or not we use a WPS. The question is about members experience of the mettalurgical effects of not performing PWHT. This is a grey code area and that is why I am seeking input from others who may have experience when working...

Good morning, We are currently reviewing the welidng for a client contract that involves welding the following material combinations together; a) P1 material (ASTM A516 GR 70) to P4 material (ASTM A387 Grade 12) Class 2 b) P4 material to P4 material The P4 materials are being used as a liner...

Hi folks, Thank you so much for providing your insight and experience. I think I may have worded the question badly and I would like to ask again in a slightly different manner. The advances in tube end joining are such that 'experts' within the industry would advise us to proceed with a Ti...

Dear All, I know this topic has been briefly touched upon in other forums but I would like to ask a question and develop a better understanding of the problem. We are currently reviewing a project where we would be asked to produce an expanded and seal welded tube end joint in Titanium...

Hi all, I am commencing a review of some new pressure vessels to be manufactured later this year. The vessels separate gas containing a high percentage of Hydrogen but not H2S. In terms of ASME, I am advised that this is not lethal service. However, I am also mindful of some client...

Thank you for the reply. The gasket programme ensures that our effective gasket stress remains somewhere in the safe region - between the recommended and maximum stress. All of the bending moments and forces are calculated and included in our submissions to the Notified Bodies. Thank you for...

Hi, Sorry TGS4. I was writing the previous reply before I spotted your post. The program does employ a formula for calculating bolt torque based on yield value. We calculate and assess all components to the design code. However, we then perform other auxillary calculations that are not code...

Thank you for the replies. All of the components are desinged using code stresses and code formulae. This is the matter of practical torque application and elevated stresses at hydrotest. We do utilise bolt tensioning where applicable but in this instance we have a client who insists on torque...

Hi, I am in a confusing predicament with bolt torques and bolt yield assessments. We are reviewing a new software for gasket assessment of seating stresses etc. It is quite good in that it enables us to insert different bolt yields from test certificates and then assess the effective seating...

Hi, We are embarking on a project for a client where we are working to the EN123445 code and PED 97/23/EC. However, our client requires us to use EN grade materials and will not accept ASTM grades such as A333 GR 6 pipe, A350 LF2 flanges and A420 WPL-6 End caps - basically low temp, impact...

Hi folks, Just a quick email to ask if anyone has heard anything about 'new rules' for pressure vessel manufacture for China - via AQSIQ. I have received woiring of supposed new rules requiring Chinese inspector attendance prior to pressure testing and the need for test plates on all vessel...

Hi folks, Just a quick question to ask if anyone knows of a website or location where I can download a template for the reporting of results from Dye Penetrant Inspection to BS EN 571 and/or ASME V. I am simply trying to ensure I am not spending valuable time reinventing the wheel if someone...