One thing I did not mention, which could play a part in this. When we first visually examined the seam, we could tell the rolling was poorly done. There were flat spots of approximatly 3-4" on each side of the seam and the seam actually met at a point (see photo) about 1/4" higher than if it...
At the end of the report submitted by the materials lab, it states that the Alloy type is 1018 carbon steel. Is't 1018 a cold finish bar spec? The nozzle if obviously made of pipe.
Our client has a pressure vessel in which was installed an unauthorized nozzle. The State has told them the nozzle can stay persuant to an acceptable UT test and calculations showing the material thickness is adequate.
The customer has provided a spectrochemical analysis of the material. In...
They are definetly cracks, we had RT and UT performed on them. I find it strange that the cracks jump from one side of the weld to the other. The total length of cracks on this seam was about 51" which is more than half the seam. Would these be considered toe cracks. I thought about cutting...
The piece of plate in the photo came from a Sec. I steam boiler. This is a section of the longitudinal seam. My questions are: what kind of cracks are these and what caused them?
Ditto on what jte said. We are facing this right now in California altering a 1950 vessel. They are making us use the original 4:1 SF for design calculaitons.
I'm no welding engineer, but it really depends on your joint design. I would think you would want to put a bevel on the tubing to get good penetration. Therfore; a groove weld symbol would be appropriat.
You could also leave the edges square and leave a slight gap to allow penetration. In...
I think I found an interpretation that specifically addresses your question:
Interpretation: IX-81-38
Subject: Section IX, QW-202.4
Date Issued: September 14, 1981
File Number: BC-81-434
Related Documents:
Question: A test coupon is prepared as follows: A 1 in. thick plate has an 1/8 in...
There are no code stamping requirements for piping attached to a Section IV (H Stamp) Heating boiler. The Boiler External Piping I referred to above applies to Power Boilers only.
Since there is no stamping required, you can fabricate this piping even if you don't have a PP stamp as long as...
AWS and ASME don't mix. However, you don't need to have a PP stamp to do B31.1 work unless you are fabricating Boiler External Piping, which I doubt you are. Get yourself a copy of ASME Section IX. It will tell you everything you need to know about qualifying welders and weld procedures.
On a Section I boiler, the manufacturer provided a 3" FNPT connection for the SRV, but the SRV that was provided has a 2" MNPT connection.
Question #1: It is my interpret PG-71.3 that the connection between the boiler and the SRV must be the same size as the SRV inlet (2"), not necessarily...
An "A" Stamp is an assemblers stamp, but this is only found in ASME Sec I, Power Boilers. Cast Iron sectionals are cover in Section IV. Per HG-534, Field-Assembled Cast Iron boilers do not require an A stamp. However, the installer is still required to do the final hydrostatic test as...
What you are referring to sounds like an atmospheric DA. Unlike pressurized DA's that are designed to operate under a certain pressure (usually 5psi), atmospheric DA's are vented to atmosphere. Therefore, it is usually not required that they be designed as a pressure vessel.
Also, if you have...
Am I reading table UW-12 wrong? The way I interpret it, you don't get any extra credit for RT of a Type 3 joint. You just have to use a .60 join efficiency.
According to B31.1 para 122.1.1(F), you can't use ANSI slip on flanges greater than 4" NPS on BEP? I'm confused by the reference to ANSI. Does this also apply to ASME flanges? The forward to B16.5 says that up until the 1996 edition it was called ANSI/ASME B16.5 so my feeling is they are one...
