Hello Engineers,
I have an upcoming interview with SpaceX for the position of Senior Reliability Engineer for spaceflight components. The primary goals of this role are to improve reliability, reduce component failures, and enhance overall system performance.
Can you please recommend some...
Hello, Engineer.
I am currently working on creating a gasket drawing for a heat exchanger cover and need some guidance on obtaining precise measurements. I have attached a picture of the cover, showing the shape and features required for the gasket. My question is: What is the best and most...
Hello Everyone,
I have 12 years of experience in engineering and hold a Professional Engineer (PE) license in Mechanical Engineering.
About five months ago, I started a new position with a smaller company that has 35 employees. While the pay is good, the work has been very repetitive and...
Hello, I would like to ask about spiral wound gaskets that have winding only, without any outer or inner rings.
Do standard sizes exist for these winding-only gaskets based on provided pipe size and rating?
For instance, what are the Inner Diameter (ID), Outer Diameter (OD), and Thickness...
Dear all,
I graduated with a degree in Mechanical Engineering in 2012 and since then I have undergone six job changes with my most recent position lasting 10 months. Currently, I am two months into my current role and am actively seeking a new opportunity.
The primary motivation for my job...
Hello everyone,
I am curious about your experiences with Vulcanized O-Rings compared to One-piece molded O-rings for non-standard o-rings. Have you encountered any failures with Vulcanized O-Rings? Your insights would be appreciated. In one of the instance, our vendor is quoting Vulcanized...
Hello All,
We have vertical turbine water pump that has cast iron parts and we are thinking to coat them. We have two options. Can you recommend, based on your past expereince, which one can provide more reliable long term resistance against corrosion. Coal tar epoxy coating or skotchkote 134?
Hello All,
We have a spherical type babbitt sleeve bearing that is oversized on ID. The clearance between shaft OD and bearing ID should be 0.007". But we have 0.015". The OD is also undersize. Since the OD is spherical, it is difficult to repair.
In order to fix the OD, we have two options...
Hello Dear Engineers,
As you may have noticed from my other posts, I am working to study pump components damage mechanism. I found another impeller damage due possible cavitation and wanted to share with you to get your feedback on damage mechanisms. This is suction impeller (first stage) for...
Hello All,
We have a multi stage split case boiler feed pump that is failing again and again on mechanical seals. Evidently, there is solid build up of process fluid in the seal camber and around seals. Here are few pictures. Here are pump rated conditions: 550 GPM, 3560 RPM, 3115 Feet Rated...
Dear Engineers,
I am looking to educate myself on damage mechanisms (and material selection) found in pump components used in services like hydrocarbons, refinery applications, city water districts, sea water applications, boiler feed service etc. Here is an example of post related to this...
Hello All,
We are repairing a pump and bearing housing bore against which two thrust bearings sit (7313 BECBM bearings) was machined oversized by 0.030 diametrical. SKF recommends that bore to be max 133 mm (5.236 inches) , as shown in attached picture. That bore is machined to 5.266”. My...
Hello All,
Can you please tell me if you know of any company that can provide this retaining ring in either monel 400, inconel or 300 series SST? I need this in 2-3 days so preferably someone who has it in stock.
Dear Engineers,
I am reaching out to ask for help in finding some O-rings. If you know a supplier or work for one, please provide their website so I ask them for price and delivery. Below is what I need.
Material is EPDM T150. O-ring ID and thicknesses are in mm below. Durometer should be 80...
Hello,
We are weld repairing a pump case on IDs/bores and want to minimize case warpage. This is because warpage can cause other issues like more extra machining and additional work will be needed if case warps too much. Especially the case split lines need to be relatively flat (within...
Hello All,
One of the boiler feed pump caught fire in bearing housing and I was wondering if you have seen something like this before and what was the root cause. Upon disassembly, the rollers from bearings were sitting freely in bearing bore of housing. I am separately working on analysis but...
Hello,
The current vendor that I use for Stellite 6 coated wear parts (for centrifugal pumps) is offering long lead times (12 weeks or more). These parts are used in applications like water injections pumps used in oil wells. Can you recommended vendors that can provide 316SST parts coated...
Hello,
I am buying a forged shaft material from a vendor to manufacture a pump shaft on lathe. My question is: how can I confirm if it is actually a forged material and not a bar? Is there a texture I can feel or anything visibly I can see to confirm if it is actually forged material? Is there...
Hello All,
I need to buy below O-rings for a project and I can’t find a supplier to buy them. Can you check these sizes/specs and let me know if I am missing something? What is so special about these O-rings?
350 x 5.7mm spliced and vulcanized EPDM 80 durometer o-ring
160mm x 5.7mm spliced...
Hell Dear Engineers,
We have a vertical inline pump here that failed probably because of rotor unbalance.
Based on impeller sizes (Impeller OD:13.75” and width 0.5”), D/ B=27.5 since it is greater than 6, it should be static balance (which we did during previous repair about a year ago)...
