The API 6A material designations are based on the yield strengths but there is also a tensile strength requirement for each material designation. The hardness requirements are based on the ASTM A370 hardness equivalent for the tensile strength requirement for each material class.
The two reports on the NTSB website go into more detail than the summary on the USCG MBI website. The outer surface was very wavy and there were very many locations where the wrinkles had been ground to allow the next layer to start without wrinkles...
Karl Stanley summed up the problem with Stockton Rush's reliance on acoustic monitoring in one of the emails he sent to Rush in 2019 (after hearing sounds in the original hull that OceanGate eventually removed from service)...
New documents have been added to the Marine Board of Investigation website, including a very interesting transcript of the meeting between David Lochridge, his boss, and Stockton Rush.
https://www.news.uscg.mil/News-by-Region/Headquarters/Titan-Submersible/
A few points:
1. Rush wouldn't even...
There's a lot of interesting newly released info at the link from IRstuff
https://www.news.uscg.mil/News-by-Region/Headquarters/Titan-Submersible/
1. Preliminary design report for the carbon fibre sub completed by Boeing (2013)
- Suggests that it is feasible but acknowledges some of the risks...
TGS4, regardless of the Part 5 requirements, do you think that any meshless methods / software are currently good / trustworthy enough to rely on for ASME Section VIII, Division 2, Part 5 analysis?
I think you are recognizing the risks with this - equivalency of different material grades is often unclear and could be interpreted differently by various parties.
Advantages of including "or Eq.":
- possibly reduced costs and/or lead times
- less engineering effort required to correctly...
The main requirements to obtain Q1 registration are:
1. Implement a quality management system that meets the requirements of API Q1 and operate for at least 4 months.
2. Complete an internal audit and management review per API Q1.
3. Apply to API for a Q1 license and pay the application fee and...
You can not get a certification for API 6AR, but you can get API Q1 registration and include "Repair and Remanufacture of Wellhead and Tree Equipment in accordance with API 6AR" in your Q1 registration scope. It appears that only a few companies do this. Whether you are required to do this or...
Talk to ABSA. They are usually quite helpful and their opinion is the only one that matters in this case.
Based on your justification that it is open to atmosphere per B31.3 - 345.1 (d), it is likely that they would allow this exception, but sometimes they opt to be more conservative.
If you can't convince people then your communication is not as crystal clear as you think or your argument is not as persuasive as you think.
Be a customer-pleaser - if they don't want GD&T then don't use GD&T on their drawings. Don't fight your customers - give them what they want (as long as...
API 6A is for the manufacture of new equipment and, as described in its scope (section 1), it is not applicable to repair.
If you are not a manufacturer then you will not be able to get API 6A certification. It is not reasonable for a client to request that you have API 6A certification if you...
Also note that API 16A is for Drill-through Equipment, so a drilling BOP can be monogrammed to API 16A, but a production BOP is not allowed be monogrammed to API 16A.
Rod BOPs and stuffing boxes are both outside the scope of API 6A. Applying the API 6A monogram to either of them would be a violation of the monogram license agreement.
Stuffing boxes are outside the scope of API 16A. Applying the API 16A monogram to them would be a violation of the monogram...
A gate valve requires (at least) two end connectors.
If the end connectors are flanged or threaded, then the material must be at least 60K for 5000psi equipment per API 6A 21st Edition Table 7. If the end connector is an "Other End Connector" per section 14.9, then Table 7 allows the material...
I don't know why the city can't provide the name. There is an old sign out front visible on Google Street View with the name "Carrington Pointe" and an archived version of Carrington's website from 2003 shows it as one of their properties...
The below article contains information and pictures from the engineering report (but does not include the whole report).
https://globalnews.ca/news/9940756/castledowns-pointe-condo-evacuation/
The discipline investigation seemed to focus only on the piles and lack of geotech for the bridge that collapsed. For 5 other bridges designed by this engineer around the same time that the hearing panel investigated, the report includes the following:
