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I need help in finding minimum wall thickness of a class 900 fitting that is NPS 16. I have tried to look into ASME B16.9, but can't figure out. I seems to be very simple probably tricky. Would highly appreciate any help. Thanks, Meck91

Weldstan, Thanks for your reply and rest of the folks on my same post at Metal and Metallurgy forum. But the discussion was without any result. And it seems that piping engineering seems to be the relevant forum. Please accommodate.

I need help from Piping Design Folks on this issue, please For 14" 4500 kPa(g) super heated steam system, based on design conditions, the wall thickness required is 0.75" for NPS 14. Piping Material is A-106 Gr B MDMT is -29 Degree C Based on ASME B31.3 Figure 323.2.2A & combination of...

I need help on this issue, please For 14" 4500 kPa(g) super heated steam system, based on design conditions, the wall thicnkess required is 0.75" for NPS 14. Piping Material is A-106 Gr B MDMT is -29 Degree C Based on ASME B31.3 Figure 323.2.2A & combination of nominal thickness 0.75” (19.05...

Is Hydrotesting Construction or Commissioning activity. Since EHT & Insulation follows hydrotesting so it seems to be a construction activity. On the other hand Hydrotest confirms the pipe integrity and its fitness to withstand operating/design conditions so it seems to serve the purpose of...

Hello, ASME B16.5-2013 has no Pressure-Temperature ratings table for A182 Gr.F60 (Duplex Stainless Steel 2205) forgings. For example Table II 2-2.8 includes working pressure for A182 Grades F44, F51, F53 & F55 but no information for A182 Gr. F60. If i have to use this flange, how i can...

Team, Accumulator Bladders are designed, fabricated and tested as per ASME section VIII Div. 1, but these pressure vessels are usually not provided with any overpressure protection device per requirement of UG-125. Are they exempted from this requirement based on????? or they are protected by...

I am trying to calculate pipe wall thickness of ASME B31.3 Carbon Steel NPS 2 & NPS 3 piping system. The design pressure of this system is very low (~ 110 Psig) & design temperature as 50 degree C. This results in very low value of tmin (i-e., pipe wall thickness required to withstand internal...

My understanding is that the definiton of shell course is, "sections of rolled shell plates butt welded togather to form complete shell". Is shell to head joint comes under the definition of "Shell Course"? Requesting urgent response. Thanks, Meck91

Thank You very much for your inputs.

We are planning to weld new 3", 300# nozzle on tank constructed to API 620, 6th edition back in 80's. Tank design pressure is 55 kPa (~ 8 Psi). I am suggesting doing NDE of these nozzles per API 620, 11th Edition, Section 7.15 "Examination Method and Acceptance Criteria". Is NDE is sufficient to...

Hi, Is there any requirement specified in ASME B31.3, regarding pipe minimum wall thickness. Just like ASME Section VIII Div. 1 specify minimum requirment for plate thickness for pressure vessels, i thought there might be some clause in ASME B31.3 as well. Thanks, Meck91

The design factor for ASME Section VIII Div. 2 is 3. But when we try to back calculate this factor of safety by dividing specified min. yield stress with the allowable stress for low to moderate temperature range, the actual ratio comes as 2.82, 3.08, 2.97 etc. not exactly 3. So it means that...

Hi, How much wall thiniing at extrados of long radius induction bend is allowed by Z662 and ASME B31.4 or how much wall thinning allowance should i add in design wall thickness for lond radius 6D bends. Would appreciate your feedback. Thanks, Meck91

Folks, Would appreciate your help, Is this possible to do a RT of small bore fillet weld. Previously I was of the impression that it is impossible to perform RT of fillet weld, however, after reading some literature I found that in most of the cases RT of fillet weld will not give you a...

Sorry, its a typo. Let's cnsider any grade of SA-516. All can be used in ASME Section VIII Div. 1 & B31.3. Thanks.

I went through some of the relevant threads with respect to above and found useful info. from seniors on this, but i would like to know the reason for this difference in allowable stress for material listed in both Secton II Part D & B31.3, for example Material SA 516 Gr. B can be used for...

Reference API 660 data Sheet: Is heat transfer rate REQUIED is or can be same as heat transfer rate (SERVICE)? Just want to confirm that Heat Transfer rate (Required) is what process usually specifies for the intended service of exchanger, and is basically the requirement from Process. In...

Folks, Would appreciate your help: Is this possible to do a RT of small bore fillet weld. Previously I was of the impression that it is impossible to perform RT of fillet weld, however, after reading some literature I found that in most of the cases RT of fillet weld will not give you a...

Pipe & Tubing Material SA-269: I can't find this material in ASME SEction II Part "A" & "D". However, this material is in ASME B31.3. Any specific reason? Thanks, Meck91