Recently, a co-worker shared with me a Casti Metals Black Book. I wasn't aware of such a book and I would love to have this as a resource.
I'm curious, is there something similar which is a bit more updated and maintained (maybe by someone like ASTM) that lists all the ASTM specs into various...
I spent some of my holiday vacation verifying the bolt root area in TEMA 8th Edition, Table D-5M. I realize the 8th edition is quite old, but it was the only one I had access to during the holidays. It was quite an effort and I hope it helps someone.
I used the procedure as outlined in the...
Aside from identifying a fill, drain, and vent point for any vessel (horizontal or vertical), how is a field hydrostatic test (or field hydrotest for search engines) performed in terms of how the water is filled?
Some of the questions I have are a bit scattered, but not having been part of a...
I've seen several posts in this forum about Section VIII, Division 2, Class 1 and Class 2 vessels. What I don't recall seeing is a discussion on manufacturer stamps and how much more common a U-stamp is than a U2-stamp.
As of right now many of the manufacturers we utilize only have U-stamps...
We have an existing field fabricated vertical vessel that has multiple design temperatures and materials; the upper-most section having a design temperature equal to 650 F and the bottom-most section having a design temperature of 1050 F. We are adding a new nozzle in the bottom-most section...
In Compress we have a simple cylinder and a single LWN nozzle with user-defined nozzle loads. The output displays a nozzle design pressure of zero. The pressure stresses in the WRC 537 portion of Compress are also equal to zero.
Is anyone aware of a default value that could trigger this?
I...
I'm staring at a detail drawing from 1974 and in the bill of material the description of the nozzle contains some abbreviations to which I'm not accustomed. I was wondering if anyone had any idea of what the abbreviations mean. Any help would be appreciated.
10" 300# SML. F.S. LG. WELD NK STD...
We are planning on installing a new LWN nozzle in an existing vessel. The new nozzle will be a duplicate of an existing nozzle and will be installed at approximately the same elevation of that existing nozzle (i.e. same shell course). This new nozzle is not replacing an existing nozzle. We are...
We are planning on installing a new nozzle in an existing vessel. The new nozzle will be a duplicate of an existing nozzle (for the most part - see below) and will be installed at the same elevation of that existing nozzle (i.e. same shell course). We are hoping to classify the addition of the...
In using Code Case 2605, Figure 1 shows the design cycles as a function of stress amplitude and creep life absent fatigue with a low value of 300,000 hours and a high value of 1,000,000 hours.
Footnote 1 states the "interpolation of design cycles as a function of design life is permitted."...
At my company, we do a lot of work for the oil and gas industry. Recently, I have been made aware of two instances where a client (different client on each occasion) specifically requested a PE stamp on a particular document for the reason that they "felt" it was an important component of a...
We have a situation where we are using a plain cruciform shaped beam in a simply supported situation. The cruciform is symmetric about the vertical axis but not about a horizontal axis (see attached image).
The beam cross section is nearly a inverted "T" shape, however, the bottom of the flange...
Section VIII, Division 1 UG-23(d) refers you to footnote 15 which states that:
UG‐23(d) permits an increase in allowable stress when earthquake or wind loading is considered in combination with other loads and pressure defined in UG-22. The 1.2 increase permitted is equivalent to a load...
In reviewing UG-23(b) after a recent discussion I overheard, I have found that different people have interpreted UG-23(b) in at least two different ways. I'm curious of what some of you think about this matter. The two different ways are as follows:
Minimum (Sa, B),
Minimum (Sa*E, B),
where...
Our client has a pressure vessel to be used in lethal service. They have explicitly stated that the vessel may be constructed using one of two options:
1. Carbon steel in its entirety (which would require PWHT per UW-2), or,
2. Carbon steel with a chromium-nickel based cladding or weld overlay...
I've recently come across an existing tank where a ringwall was installed but had previously been supported at grade. The tank looked most unusual at first glance; the outer face of the shell was still mostly white with coating, however there were rust-colored lines in the longitudinal...
I have a question/comment regarding the applicability of OSHA proof testing requirements to welded head lugs and tailing lugs.
Here in the USA, OSHA 1926.251 applies to vessel lifting lugs and requires a proof test to 125% of the rated load of the lug...
Hello,
About two years ago, I noticed that one of the National Board numbers on a new ASME Section 8 pressure vessel had a very low number, something like the number 17. Later I found new vessels with even lower numbers. I wonder if numbers 1-xx are assigned to each manufacturer for each new...
I have a new pressure vessel which is not Code stamped. For process conditions it is required to be PWHT, but this requirement was added after the vessel had been hydrotested. The vessel is still at the shop and will now receive a PWHT.
Is it recommended to perform a second hydrotest after the...
Greetings!
I am interested, as a matter of an academic exercise (stemming from a design issue at work), how to perform an elastic analysis of a rigid frame (using analytical methods), with the following description:
Visualize a three-sided rectangle, similar to many of the stick figures in...
