I have a problem with one specific drawing where I have created a right viewport; however, if I doubleclick in the port to enter model space, the viewport automatically changes to a top view. If the viewport is locked, no change to the view. This problem only exhibits itself in one drawing so it...
I need two very small centrifugal fans. The problem is that I require explosion proof motors and need two speeds. One fan requires 50 cfm (4 ACH) continuously and 150 cfm (12 ACH) on high. The other fan requires 150 cfm (4 ACH) continuously and 450 cfm (12 ACH)on high. The fans need to be...
Any thoughts or insights on the sound of cavitation for a gerotor pump? The pump in question is a lube oil pump on a marine diesel (3208NA). The sound is nothing like the typical gravel or marbles sound associated with cavitation in a centrifugal pump. There is some very minor damage on the...
I am reviewing the records of a 5 year old mobile crude oil processing plant. The plant was never put into service because of bankruptcy and other legal issues. The problem is that all of the records are available from the plant’s construction except the hydro test records for the piping...
Has anyone had a compatibility problem with block insert nodes becoming unusually large when running AutoCad with Bentley AutoPlant. The nodes will shrink if I regenerate the drawings; however, they will not completely go away. The blocks that are creating the problems are objects that are 3D...
I used to have a graph showing viscosity of the most common petroleum products verses temperature and now I can’t find it. Does anyone know where there is something like this on the internet? Specifically, I am looking for a relationship of viscosity verses temperature for Ultra Low Sulfur...
Any thoughts regarding the best type of pump for: Crude oil with a few % solids. The majority of the solids are locked up in an emulsion (roughly 10 to 20%); however some of the large particles (300 microns) are oil wet outside of the emulsion. The majority of the solids are in the 1 to 10...
Does anyone have a copy of MSS-SP-51 that shows the flange rating of a class 150, 304 SS flange? These are flanges that are designed to mate to ASME 16.5 #150 flanges; however they are much thinner. I do not believe that they carry the same pressure rating as the 16.5 flanges due to the...
I am not having any luck finding a 9/16 clevis bolt with a 3-11/16 grip. I have looked on the internet and could not find a table showing an AN29-?. All of the suppliers that have tables listing clevis bolts seem to drop off at around 1/2” diameter. Is there a specification that lists all of...
Can anyone point me to a source for obtaining the coefficient of thermal expansion and bulk modulus for crude oil? It would be great if the properties were broken down by prevailing crude oil stocks listed by geographical areas in the United States. Specifically, I would like to see typical...
I wanted to bring this thread378-107915 back to see if anyone had any further comments. Basically at issue is a 2500 meter straight run of pipe (assume expansion joints for thermal expansion) in a tunnel (no room for expansion loops) with a valve closed at each end. There are multiple anchors...
What is the typical “standby pressure” AKA “static pressure” range for a R507 refrigeration system at 70 degF? Note: I am not using this information for charging the system. The information is need for a rough transient analysis during startup.
I currently have problems with finding solutions using the solve block, “Given ____ Find.” The problem is when I have equations in the solve block that very far apart in their solutions. Example: a solve block used to calculate flow would have variables with solutions of 10^7 for one...
Hello,
I made some drawings for building a foundation, footing, and slab specifying compliance with ACI 301 and 347 and that any trowel marks would have no vertical profile on the finished slab. This work is for a new house that I am building. Having a mechanical background, I am not familiar...
I have a drawing with annotations in model space. Is there an automated way to pull some selected annotations from model space to paper space? I would like to generate another scale view and the annotations are in the way. I will need to have both new and old views in this updated file.
Thanks
I am upgrading an all air heating system with the addition of air conditioning. It will be a 7 ton split system for a small convenience store. The summer design temp is 68 degF DB and 58 degF WB. The corporate facility engineer stated that an equipment installer in my area told him that the...
Is there a standard flow direction for 1502 hammer unions?
I looked on the web and found Anson swing check flowing from male threaded end to female. Kemper swing check shows the opposite flow direction relative to the hammer union fittings. What is the standard/conventional flow direction...
I own a 1946 Republic RC-3 that had a filet weld failure on the landing gear torque tube assembly. In 1961 there was a manufacturer’s Service News letter that stated if the weld was cracked to:
grind off all existing weld down to parent metal and arc weld with nickel steel rod, building up...
Hello,
I have a Republic RC-3 that had a failure of a highly stressed welded fitting on the landing gear. Republic stopped manufacturing the model in 1947 and they no longer offer any support for the model. In 1961 Republic issued a Service Letter giving inspection instructions along with the...
