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  1. Blazer406

    SP001 - Leak Testing Method

    Per SP001, you can use Leak Testing Method as a form of inspection in certain cases. They don't go into very much detail on the specifics of the different methods: Gas Pressure Decay (includes vacuum decay) Gas pressure soap bubble testing Gas tracers (e.g., helium tracer) Soil tracers...
  2. Blazer406

    Aboveground Storeage Tank - Inspection Standard - Choices?

    My company has primarily used API 653 to use as a guide by which its tanks were inspected to. It appears SP001 is gaining favor and has some advantages for tanks meeting certain criteria. Among the more attractive advantages are (possibly) longer intervals between inspections and in some cases...
  3. Blazer406

    HDPE Acid Tank Spec - ASTM D1998-06

    I have since found out a little more detail about one installation. We installed a conservation vent set to begin opening at 9" WC and be fully open by 10" WC. On the very first loading cycle, with the scrubber set to hold 6" WC internal pressure in the tank, the conservation vent opened and was...
  4. Blazer406

    Need to datalog Hydrochloric Acid Fumes pressure?

    I believe the pressures are usually less than 10" WC, but at the end of the load as the operator blows down the tank and the last bit of acid leaves the tanker headed toward the storage tank, the large burst of air that enters the HCL storage tank could be driving up the pressure above 10"...
  5. Blazer406

    Need to datalog Hydrochloric Acid Fumes pressure?

    Thanks for the info.... I didn't intend to double post.....but it was suggested to post over on the Chemical forum..... which hasn't got much attention anyway. In my situation, we are only using this very short term.... we are tweaking our fume scrubber design and vent line size. We need to see...
  6. Blazer406

    Need to datalog Hydrochloric Acid Fumes pressure?

    I am looking at: Datalogger - a Dataq Instruments EL-USB-4 USB single channel 4-20 mA current loop data logger. $75.25 stores up to 32,000 readings. Can log at 1 per sec or up to 1 per 12hrs.... once you configure it and start it... you just let it collect unti you are through and plug it...
  7. Blazer406

    Need to datalog Hydrochloric Acid Fumes pressure?

    Yes, I used to have one of their big catalogs......there is so much stuff on there....it is mid boggling on what I actually need. I was hoping someone that is current on what is actally commercially available... recommend a particular sensor and the hardware to interface with it and a PC.... I...
  8. Blazer406

    Datalogging pressure in the vapor space of an HCL tank

    I need to be able to datalog the pressure in the top of a 6500 gal 37% HCL tank to see what the pressure does as the tank is being loaded by a tanker truck. We used some labview items back in college, but that has been years ago. The pressure transducer needs to be capable of corrosive fumes...
  9. Blazer406

    Need to datalog Hydrochloric Acid Fumes pressure?

    I'll try over there.... but I am a ME and we dip our toes into many corners of engineering..... so I respectfully disagree..... datalogging pressure transducers is ME stuff to me.
  10. Blazer406

    Need to datalog Hydrochloric Acid Fumes pressure?

    I need to be able to datalog the pressure in the top of a 6500 gal 37% HCL tank to see what the pressure does as the tank is being loaded by a tanker truck. We used some labview items back in college, but that has been years ago. The pressure transducer needs to be capable of corrosive fumes...
  11. Blazer406

    HDPE Acid Tank Spec - ASTM D1998-06

    I've been going round and round with trying to figure this out. Product: 37% HCL Tank: 6500 gal HDPE tank There is an venting "study" where an engineering company studied the potential internal pressures and ACFM while loading HCL from a tanker truck into the storage tank. You can find this...
  12. Blazer406

    Repair or replace? 5 ton residential unit - 12 years old

    I ended up going with the AS equipment in a 13 SEER. I did choose to step up the inside furnace (on the 5 ton) to the furnace the distributor was specifying for the 15 SEER system....the evap coil (oddly enough) was the same from the 15 SEER to the 13 SEER. I got the 2 stage gas valve with the...
  13. Blazer406

    Installing a TXV on a set of new coils that has a fixed orfice?

    I ended up just going with the American Standard equipment which comes with the TXV. I appreciate the design of the TXV as opposed to the fixed orfice. Once I read about both of them, I knew which one I had to have on my system.
  14. Blazer406

    Repair or replace? 5 ton residential unit - 12 years old

    williard3, No.... but I was not expecting 2 days labor (contractor said it would take hopefully no more than a day and a half) , about 25' of supply duct, about 10' of return duct, a condenser unit concrete pad, the wiring for a 2 ton air handler and condenser unit (both very short runs under...
  15. Blazer406

    Installing a TXV on a set of new coils that has a fixed orfice?

    Can you install a TXV on a set of new coils like the all aluminum coils you can get with a Goodman unit? The best I can tell.... they only come with a "check flowrater" which upon googling that.... It is just a fixed orfice. I really want the TXV but would like to consider a goodman split...
  16. Blazer406

    Can't decide what brand / pricepoint equipment to buy.....

    I had pretty much decided to get American Standard 5 ton with gas heat to replace my current 10 SEER RUUD. Everybody around here (I live in central MS) said don't waste your money on the 90% or 95% furnace.... cause you won't see your payback until the product is already at the end-of-life. My...
  17. Blazer406

    Repair or replace? 5 ton residential unit - 12 years old

    Well..... I got my "estimate" for the labor to replace my whole 5 ton system and install a new 2 ton system..... OUCH! I'm going to ask for a breakdown of labor vs materials..... just to check. I am supplying the condenser, lineset, furnace/air handler, thermostat etc. He is supplying the...
  18. Blazer406

    Repair or replace? 5 ton residential unit - 12 years old

    Well.... The 2nd HVAC guy came and looked and agrees that I need to stay with the 5 ton for my downstairs. I have 9 and 10 ft ceilings throughout and a huge vaulted ceiling in my living room that is close to 20 ft at the top. I also have no conditioned space above any of my current downstairs...
  19. Blazer406

    Repair or replace? 5 ton residential unit - 12 years old

    berkshire, I am assuming you mean 2-stage or 2-step compressors? I am already wanting to make sure I get the variable speed blower in the air handler. The 2 ton and 5 ton AS 15 SEER systems my buddy quoted me have the variable speed blower but I think just single stage cooling. I have asked...
  20. Blazer406

    Repair or replace? 5 ton residential unit - 12 years old

    IRstuff, I agree for the most part. I am a mechanical engineer. They make us do plenty of HVAC calcs. I do understand an appreciate the importance of not oversizing too...... My "Trane" guys answer when I question him about why I shouldn't downsize the unit once I take the upstairs "load" off...

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