I am building a two story coastal home on timber 8x8 pilings. The blow count was inconsistent, between 6 and 20. A local engineer recommended using an extended concrete footing (width of 12", depth of 16" between the pilings with (4) x #5 rebar passing through the pilings. I have read on this...
The system will treat process water from a diesel scrubber system. The process water will contain diesel PM, copious oxygen, ammonia nitrate, Sodium Sulfate Na2SO4, and Sodium Bisulfate NaHSO3. There should be minimum chlorides present.
We are being asked to perform a 3 month pilot test to treat process water with 15% sodium sulfate, pH around 6, temperature around 95-110 deg F. The only equipment we have (to meet the deadline) has epoxy-coated, 1/4" plate, carbon-steel tanks, with 304L nozzles (flanged and threaded). There...
I have heard the same complaint from many vessel operators. The only recommendation that seems to help is removing as much particulate matter from the bilge water prior to entering the membranes. Several stages of filtration may be required (perhaps a 20 um bag followed by a 5 um filter)...
We don't plan on painting the exterior. We can probably power wash the surfaces, but sand-blasting is simply not going to happen. I spoke with Carboline and they recommend sand-blasting all surfaces to get an effective coating.
I'm not sure that silane is effective on steel. Have you heard...
I am looking to apply a coating/protectang on a 304L SS tank that is used to hold oily water in a 0-2% saline solution. There is some pitting present on the plate and welds after about 3 years usage. The temperature is approximately 10-30 deg C with atmospheric pressure and a pH between 6 and...
I have been the principal investigator on several SBIR's, I don't have a PhD, and our company has only 5 full time employees. It is possible, but you must be prepared for a ton of background work for a good chance at receiving a grant. I would start by finding a champion in the applicable...
I have not used the NAG Marine monitor, but I have extensive experience with Turner Designs monitors. I have evaluated and used many manufacturers and models and have found that fluorescence technology, while not perfect, is superior to scattering light equipment. You will pay several...
I am trying to determine the proper way to seal carbon steel members that are joined by intermittent welds. The steel is cold-rolled ASTM A36 and the final product is epoxy coated with a chemical resistant tank lining (2 coats no primer, 5-6 mils DFT). The final product will be used in an...
Ledon, The material specifications for each class of ship can be different; however AFFF piping for all ship classes I am familiar with must be 90-10 (MIL-T-16420). Different tank materials can be approved depending on the size of tank and ship class. I would consult NAVSEA directly, and...
Certain natural strains of bacteria will degrade fecal matter to non-hazardous end-products (primarily CO2, water, and bacterial cells). These cultures are more plentiful in warmer waters and are less prevelant in colder climates (such as the Great Lakes). I would caution your Chief that fecal...
I must confess that I am potentially guilty of, or at least complacent in, violating software property rights. After reading the ethical reasoning in this thread have forced me to evaluate my responsibility, and have decided to attempt bringing the company I work for into compliance (as I am in...
MintJulep "His mistake was resigning. Had he stuck it out he might have had a shot at getting fired, in which case he would have had a much stronger case."
I don't think that your assumption that sticking with the job would make a better legal case. If he had stayed, it could easily be argued...
My experience is for Marine environments, so vibration and accidental environmental spills are a major concern. All fuel piping is welded or flanged (with appropriate containment). As noted in threads above vibration isolators / expansion joints are a must.
I am contemplating the starting on my own as well. I am moonlighting with new clients to gain experience and highly recommend it. Try reading "Inside the Technical Consulting Business" by Harvey Kaye. The book is about 20 years old, but the advise is from an engineer and written in easy to...
