Recent content by mandarkardekar

Thank you sir.

We are procuring PSV from one of reputed vendor where there is a remarkable difference between effective and actual discharge of orifice. Vendor has selected "R" type orifice as per API520, with effective discharge area as 10322mm2. However actual discharge area for the same is specified as...

COMPRESS gives warning for plate material only. Exemptions in Code are for circumferential welding of pipe and tubes for certain cases and thermocouple attachment weld. Do you have any interpretation about plate material where it is exempted? I think for all thickness of plate material PWHT is...

Thank you all for response. Mech2325, Table UCS-56-4, General Note (a), in ASME Sec.VIII, Div.1 has reference for PWHT mandatory.

Adding to above, which means my vessel shell, dished head, girth flange and blind cover entire to be PWHT. Is there any more conditions which can exempt PWHT for this situation?

Mech2325, thank you. As I see in Table UCS-56-4 applicable in this case, General Note (a) says PWHT is mandatory in all conditions, exempted for certain pipe and tube cases and ERW case. Which means other than exemptions it is PWHT mandatory for vessel made up of SA-387 Gr.5, Cl.2. please help...

PWHT, is it mandatory for low alloy steels such as SA-387 Gr.5, Cl.2 plates for all thicknesses? In my project vendor has provided PWHT for all such cases for entire vessel. please someone guide.

What is the difference between "Design by Rule" and "Design by Analysis" in Sec.VIII Div.2? When we have to apply either of them?

I am user.

What is additional requirements and method is required to handle Div.2 code stamped equipment. I have used sec.VIII Div.1 but not Div.2. Can someone please summarize.

Hi Idrus, In my opinion if FE Analysis to be carried out, it is better to be performed for entire tank. I am considering design standard as, API620 (no ASME consideration at all)for entire equipment. API 620 temperature limit is applicable for entire tank and hence to design same tank for...

This is API620 tank and not ASME vessel for sure. However as design temperature is beyond API limits need additional thermal analysis (FEA).

difference between TEMA thick expansion joint and ASME app. 5 expansion joint?

Thank you EdStainless for your quick reply. Please let me correct my question above. Actually my vendor has come with excuse that he has over expanded the tubes lengthwise. Which means it is expanded beyond the inner face of tubesheet. Even though thinning of tube is not much in this area (just...

It was happened the over expanding for shell and tube exchanger during the expanding work. (Tube min. required Th’k : 2.77mm, Tube Th’k after expanding : 2.70mm) IS this acceptable?