Hello,
I have a part which has an outside profile of a straight slot. This part has a top surface and a bottom surface, and has additional machined features not shown in the example. My primary datum, A, is the outside surface of the part. This is similar to ASME Y14.5-2018 Figure 7-3(f), which...
Hello everyone,
I’m looking for help in finding what I can best describe as a pressure compensated flow regulator or pressure compensated flow control valve for compressed air. I know that these valves are readily available for fluid power applications, but I cannot seem to find what I need for...
Perhaps an odd question and I am not sure if the code issues sub forums is appropriate so here we are.
I’m wondering if anyone has experience or thoughts about whether fluid power systems are subject to NFPA 30 code compliance. This would be for systems or equipment utilizing petroleum based...
@TugboatEng,
This is may be off topic but I was under the impression that ULSD (with water present) was actually more conducive to microbial growth than previous diesel with higher sulphur concentrations.
Or perhaps that’s only due to the addition of biofuel?
Link
@3DDave, thanks - I now agree that the hole to hole spacing should be made basic.
@Burunduk,
The OP2 drawing does describe the final product.
The holes produced in OP1 are the primary and secondary references in the OP2 DRF. The tertiary is actually the milled face that the holes are machined...
I've just recently needed to deal with something like this. It's currently unproven since we haven't produced yet, but I've gone with the following method following a description of the process since I think specifics might help.
- My product is a casting, but some of the datum target locations...
Ryan6338,
Thank you - that was my attempt - to use the linear tolerance grades to give me a ballpark figure on the process limitations.
I did see section 5.2 of the document, but the last paragraph was confusing to me as it referenced the linear tolerances in table 1. "Three accuracy grades...
Hello,
I’m working on the design of an investment casting and have a question regarding interpretation/application of a tolerancing standard to the product. For background, the casting is an investment casting made of CF3 (UNS S30403 Equivalent). Our product definition is IAW ASME Y14.5-2018. We...
@franhd, I think you may be looking at or attempting to evaluate this from the wrong perspective. For the fixed/floating fastener method to work, I believe you need to know about the mating part. Since we don't have the mating part (as far as I can tell), you can't apply the fixed or floating...
@LittleInch
Yeah, 5-psia for a liquid, media will be hydraulic or lubricating or gear oil and could be quite viscous. 5-psia is under intermittent conditions as there's a PD transfer pump and also a vacuum pump involved in the setup.
Your recommendation does bring up some results which could...
Hi there,
Not sure if this the most appropriate forum for this question, but I'm not sure where else to post it.
I'm looking for an air pilot hydraulic valve with minimal resistance to flow for flow rates of 3gpm to 6gpm for oils with viscosities up to 1000-SUS (~ 210-cSt). Ideally, I'd find a...
@jassco,
Thank you for the trial and for giving me the tip on the 3D sketch. I think that's what's most important. I'll play around with this later on when I have a chance.
@3DDave,
I did make an attempt on square tubing using the exact method I showed for round tubing and it looked awkward -...
I didn’t see the is questioned elsewhere, but have you checked to make sure the internal and external threads are correctly modelled? In other words, have you confirmed that the major, minor, and thread profiles are correct?
I have had to model threads before for a pressure vessel design since...
@3DDave and @ctopher, thank you both for responding. Normal to surface modeling for tube laser is something I've thought about off and on for the better part of year and tried a few different things - but for some reason (as it seems to always occur after hitting 'send') only now did I try using...
Hi everyone,
I searched the forums but didn't see anything that caught my eye on this topic. I'm hoping to better utilize our vendors' tube laser machine in the design of frames and components and I want to ensure that I'm modeling the parts in a way that accurately reflects their true form...
Hi everyone,
I just wanted to come back around and thank you all for your replies. Each of these was very helpful and I've been leaning on some of these tips over the last several months and will continue to do so going forward. The recommendation of finding out what our suppliers typically had...
@XL83NL,
Thank you for pointing out the error in my UNS S30403 callout example.
Based on your feedback regarding the CS plate spec - I agree. The trouble for me is I don't quite know how to find the appropriate ASTM spec. I'm most often just searching keywords online or on the ASTM site - is...
Hi there,
Apologies if I'm being dense on this topic, but I can't quite sort this out.
I'm having some trouble understanding how to properly specify carbon steel plate/sheet materials for fabrication (located in the US). I feel as though I can properly specify an austenitic steel plate - but my...
Hello,
I'm tasked with design of a filter (pressure vessel) to meet a specific UL Standard, 331, and only to that standard. To my understanding, the standard covers some requirements and limitations on the construction of the filter, but not to the extent of a code, say for instance ASME BPVC...
TugboatEng,
Thanks for the response. I may not have described the situation properly but this image linked is a good representation of the bolted assembly
- Link
The image is pulled from a Nord-Lock example - so ignore the washers in the image. This is why I believe I won't be able to use...
