Thanks all for the responses! Sounds like I need to do an unlisted component evaluation and perhaps specify different hose end connections that can hold pressure better.
The key to success is dedication to life-long learning. -Stephen Covey-
Hi all!
I'm trying to find out if the ASME B31.3 code allows for the use of a barbed hose fitting (for a rubber hose that is qualified to B31.3), see attached screenshot. Table 326.1 lists SAE J514 (Hydraulic Tube Fittings), but without buying the standard, I'm trying to find out if it has...
Thank you dauwerda and HTURKAK for your responses! You confirmed my suspicions.
The key to success is dedication to life-long learning. -Stephen Covey-
Please see my linked thread below (unanswered) regarding the supplied VERTICAL SDS value for use in a static structural analysis.
[highlight #FCE94F]The main question: Is it good for nothing (with regard to it's use with ASCE 7's static seismic load equations)?[/highlight]
thread507-449338...
Good thoughts. It sounds like some would say to apply separately the worst-case radial loads in their given directions or to simply apply the higher (magnitude) radial load in the +/- directions to be conservative.
Thank you for the responses! Happy Friday!
The key to success is dedication to...
(If I understand your question correctly...) We are required to guarantee the stress state with all 6 loads acting concurrently.
Also, there is no cyclic loading expected, so no fatigue considerations.
The key to success is dedication to life-long learning. -Stephen Covey-
In WRC 537, Table 5 (Local Stresses in Cylindrical Shells), the corresponding image (see below) shows the positive radial load as acting inward towards the vessel.
I am using a pipe stress program to calculate worst-case nozzle loads and have both positive and negative radial force values for...
Hi all!
I am trying to qualify some existing Unistrut P1000 trapeze members for seismic loads. Local buckling is not expected because of the pipes strapped to it every few inches. However, the ASD moment capacity given by Unistrut in their catalog is 5070 in*lbs (422.5 ft*lbs). They also...
Hi All,
I have been given separate horizontal and vertical (site-specific) SDS values to use in my static structural analysis. I am using the ASCE 7 ('05 and '10) equations in Section 13.3.1 for calculating a seismic design force. The definition of SDS below those equations says that it is the...
I get the feeling that the carrier pipe is intended to slide inside the casing pipe. Am I to understand that the carrier pipe will not be welded to the casing pipe at any point? So it is just like a hot pipe sliding inside a cold "tunnel" pipe. How far between expansion loops?
You are right on...
The inner pipe is stainless, STD wall and the outer pipe is Carbon Steel, STD wall. I believe there will be some intermediate lateral supports along the inner piping in addition to the vertical supports. But these will be allowed to "float" (with some steel-to-steel friction) on the ID of the...
First of all, thank you for your responses!
This is a real system that has a 3" inner pipe carrying hot water (~200deg F) and vertically supported (with supports connected to outer pipe) in a 6" outer pipe. Owner requires a low installation temperature of 60deg F for pipe stress analyses, so...
Let's start with a buried double wall pipe. Let's say the carrier pipe is hot and the encasement pipe is cold. The former expands, the latter contracts. Thermal expansion loops are integrated in the system at calculated pipe span lengths to avoid interaction between inner and outer pipes...
