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  • Users: StoneCold
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  1. StoneCold

    High Pressure Unstamped Equipment

    I recently ran into a bunch of Chinese made CO2 extraction equipment. The equipment is not ASME Stamped. There appears to be no other pressure certifications either. The equipment runs in the 3000 to 5000psig range. The operating temperature is near 140F. The piping is all less than 1"...
  2. StoneCold

    Treating a water stream with 13 wt% Isopropanol

    Greetings all I have a small stream intermittent stream of water that contains 13 wt% isopropanol. I would like to remove the isopropanol down to about 2% so the flash point is high enough to go to a POTW. The water stream is generated in 100 gallon batches about 4 times a day. The water is...
  3. StoneCold

    Closed loop heat transfer pump control problem

    Greetings All I have a closed loop heat transfer pump control problem that I am just not sure the best way to solve. Let me explain. We are a batch chemical plant. I have a chilled fluid loop that is recirculated by two centrifugal pumps. One pump is running and the other is in standby...
  4. StoneCold

    ASME B31.3 Unlisted Components Issue

    Greetings all I am hoping to get some opinions on a B31.3 piping compliance issue for some existing piping. I have a bunch of 2” and smaller threaded 304 stainless steel piping. The piping is a maze of short runs with a lot of fittings and valves. The piping does dual service, part of the time...
  5. StoneCold

    Thermal Relief of ASME B31.3 piping

    I have a simple question but I don't really see a code reference about it. I have a flammable liquid full line. 2" Sch40 A106 if it matters. I want to use a check valve around one of the block valves as my thermal relief. The "discharge" side of the piping is vented back to the tank so pressure...
  6. StoneCold

    What kind of corrosion would you call this?

    I have an older reactor that is made of 316Lss. It has been exposed to acid numerous times. It is developing these black areas with pits. I wonder what you call them? Obviously the tank needs replaced. I get that, but from a pursuit of knowledge aspect. What is happening there? Why is it...
  7. StoneCold

    Stainless steel in cooling water and sodium hypochlorite

    Hello all I have been reading around here for a couple of hours and can not get my head around this issue. I have reactor jackets made of 304L stainless. They are used for steam and for cooling water. My cooling water treatment guy, would like to switch my biocide to sodium hypochlorite, to a...
  8. StoneCold

    Restriction Orifice in Liquid Service Making Noise

    Greetings all I have a restriction orifice in the spill back of an ether transfer line. The orifice makes a horrible howling noise when it is running, and I want to fix the problem. I don't think it is hurting the pipe but the noise is iritating. The details of the orifice are as follows...
  9. StoneCold

    Butt welded or Socket welded

    Greetings all I have kind of a delema that I am wondering what other users do. I am installing a solvent transfer line in a chemical plant. The line is small, 1" sch 40 A106 pipe. Welding is GTAW. I originally spec'd the line out as butt welded. I did not want any solvent hold up in the...
  10. StoneCold

    Painted Fittings

    I have problem with typical carbon steel fittins (A105). These fitting come from the supply house dipped in primer to prevent rusting. I want to weld the fittings into a solvent line but I am concerned that the paint will flake off the fittings and travel down stream. Does anyone have a slick...
  11. StoneCold

    C-276 Shaft Straightening

    Greetings all I have a 2.375" diameter x 120" solid C276 shaft. The shaft is for an agitator that spins 155 RPM. The shaft has a coupling at one end, goes through a double mechanical seal and then extends down into the vessel about 9ft. The shaft was bent in process, almost an inch, overall...
  12. StoneCold

    API 650 Tank with a Rolled Bottom Ring

    I have a 304 Stainless API650 Tank, Tank is designed for 2.5 psig. Capacity is about 10,000 gallons. Diameter is about 12 ft. The tank sits on a sloped concrete pad. (The bottom of the tank is sloped to drain out. the Hold down ring has began to curl up, in some places it is 1" off the...
  13. StoneCold

    Rupture Disk ASME certified

    My current employer would like to discontinue the practice of having rupture disks ASME certified for pressure vessels. He would rather just use the graphite ones "off the shelf". I am against the change but can not find in the code where it is specifically stipulated. I see in ASME VIII...
  14. StoneCold

    Hazardous area electrical

    I am interested in peoples opinion about buying equipment rated by agencies out side of there own country. For instance I am looking for a camera for use in the USA. Area classification is Class 1 Div1 Group C+D. Most of the cameras out there are ATEX rated. The chemical company I work for...
  15. StoneCold

    Maintenance Welding for Chemical Plant

    I work in a small chemical plant in the US. Our piping falls under B31.3 for almost everything. Our larger recent projects are handled by contractors who do the welding and we have 5% x-rayed and if there is no problems then hydro and put into service. My question has to do with welding by...
  16. StoneCold

    NFPA 497 Classsification for Labratory Operation?

    Hi guys.I have a project in a labratory and I need to make an electrical area classification drawing. The project is a 10 gallon chemical reactor inside a walk in labratory hood. The hood has forced ventilation and I am getting reading on the face velocity today. The real issue is by NFPA...
  17. StoneCold

    What type of pipe to use?

    I have an old gravity sewer line that runs 215ft to a sewer manhole. The existing line is a 4" clay tile and the city engineer would like me to replace it/ upgrade the line. The line currently services an industrial facility with about 100 people. The pump that empties the lift station...
  18. StoneCold

    Alloy for hot chlorine service

    I need an alloy option for a 400C dry chlorine service. Pressure is low <50 psig. Application is as a melting tank and reactor for a molten metal reaction. Reactor design temperature is probably 450C or better. Any ideas. The reactor is small maybe 10 gallons so exotic alloys are...
  19. StoneCold

    Shaft Joining Method Tapered pins and Brass Sleeve

    I have an odd shaft joint that I need to get apart.The joint is used to join two 1.5" diameter drive shafts. The shafts go between a gearbox and a vessel seal.The joint is more like a joint used for wood than a joint used for metal. The ends of the two shafts are covered by a brass sleeve...
  20. StoneCold

    Sewege Meter Pit Details

    Hi I am looking for some details for a sewege meter pit additon, directly down stream of a lift station for an industrial facility. I know that the line exiting the lift station and coming into my new meter pit would be 2" sch 80 pvc. The pit is going to be a 4ft x 4ft concrete box with a 30"...

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