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  • Users: curtis2004
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  1. curtis2004

    1/2" Relief Valve Crane 2604

    Hello Everyone, I am writing this post to find out product data sheet for 1/2" Crane 2604 relief valve. I came across this valve installed in low pressure lube oil system and would like to know its relieving capacity. Based on drawing, it was installed in 1953. Couldn't find anything on the...
  2. curtis2004

    ASME B31.1 102.2.4 Ratings: Allowance for Variation From Normal Operation.

    Hello Everyone, I am trying to determine design pressure of penstock in hydro power plant. Currently there are mix of Class 300, 400, and 600 valves are used as drain valve for different equipment close to the bottom of the penstock. The elevation change from maximum elevation of reservoir...
  3. curtis2004

    Hydrotesting Proceedure: tapping pipe welds with a hammer

    Hi Everyone, We are working in a project for mining facility located in Russia. I was reviewing local contractor's hydrotest procedure and come a cross to sequence what shall be done tin order to comply with local GOST regulation: "- reducing the pressure to the operating pressure and final...
  4. curtis2004

    ASME Section VIII Div 1

    Hi Everyone, As I know current Section VIII-1 code allows pressure vessels be both fired vessels and unfired vessels. Is this was the case from the beginning or previously Section VIII-1 was only for unfired vessels? I think, letter "U" in nameplate come from first letter of word "Unfired". I...
  5. curtis2004

    Pump Flange - What Pipe flange should I install?

    Hi Everyone, I'm designing piping system for thermal fluid with design pressure 150 psi @ 550 F. I have a pump in this Hot Oil system ordered from Germany and I've got the following flange specification: Pump Standard: EN733 Suction nominal dia.: NPS 6 Suction nominal pressure: CL 125 Suction...
  6. curtis2004

    What is the pipe material?

    Hi Everyone, I am working in a Thermal Oil system piping retrofit project in a Sawmill. The original system was installed in 1987. There is no documentation whatsoever available at this point. None! I'm collecting some data from equipment nameplates and come across this pipe with original...
  7. curtis2004

    3-way Valve in AutoPIPE

    Hi Everyone, I need your help in modeling of 3-way valve in AutoPIPE. I found out that it should be modeled as rigid element, which include 3 different valves with dummy legs converted into rigid tee. To be honest with you I have done this about seven years ago, but now I forgot. :-) I...
  8. curtis2004

    Cost of ASME pipe vs ASTM pipe material

    Hi Everyone, I'd like to ask question about cost difference between ASME spec pipe vs. ASTM spec pipe. Particularly, I am insterested about SA106B vs A106B, SA53B vs A53B, or sizes 2"xSch40, 3"xSch40, 4"xSch40, 8"xSch40, 12"xSch40. Cost per pound or per length. Do you have any idea? If actual...
  9. curtis2004

    ASME SA material in B31.3 piping

    Hi Everyone, I couldn't any previous discussions on this issue. The question is: Can we use ASME SA material (for instance, SA-106B instead of A-106B) in B31.3 piping? Is this can be done? If so, what changes shall be followed during design process? What allowable stress values (from Section II...
  10. curtis2004

    Underground and submerged lines insulation and heat tracing.

    Hi everyone, 1. I have water and condensate drain CS lines going U/G which shall be insulated and heat traced to the portion above frost line. Is there any guidelines what materials to use for insulation cladding and heat tracing? 2. I have a concrete storm water basin with submerged water...
  11. curtis2004

    Maximum flow through 100% open valve

    Hi Everyone, I'm having a brain fart and can't remember how to calculate max. flow through a valve for PSV sizing purposes. I have a superheated steam line with pressure reducing valve: Inlet and Outlet Line size: 3" Valve size: 3" Pinlet = 190 psig Poutlet= 73 psig Tinlet = 275C Flow = 700...
  12. curtis2004

    Spools Painted with studs and nuts

    Hi Everyone, Piping sub-contractor bolted together carbon steel piping spools and painted as it was bolted all piping spools including studs and nuts too. This is small bore piping (=<2") for Auxiliary Nitrogen System of power plant. 1. Is there any issue with painting all studs and nuts? 2...
  13. curtis2004

    API Trim 10 instead of Trim 12

    Hello all, I am working on a small 2" drain line replacement project in NGL facility. I am using company spec to specify valves and come across with a problem. The 2" line material is 304 SST with design temperature of -100C/50C. The main reason for -100C temperature - during draining ethane...
  14. curtis2004

    Modelling of line which changes from B31.1 to B31.3 in Caesar II

    Hi Everyone, I have to analyze a steam line which starts inside a power plant and goes to an upgrader. The power plant is designed to B31.1, but the upgrader design code is B31.3 At some point close to border I have to make code change. I'm planning to install 6 DOF anchor point at location and...
  15. curtis2004

    Unloading tanker truck hose and pipe when loading point is lower then A/G tank nozzle

    Hello colleagues, I am reviewing a design of Light Oil system with a Light Oil storage tank. The system is used to store and distribute diesel fuel to emergency generators and auxiliary heating boilers. My storage tank is about 80,000 liters with horizontal construction and have 6" loading...
  16. curtis2004

    Nozzle loads for vertical pressure vessel

    Hi everyone, I have calculated nozzle loads (Fx, Fy, Fz, Mx, My, Mz) for a vertical vessel with nozzle in a top of the vessel. I have obtained calculations from a vessel manufacturer with "Loads to be carried by welds, per UG-41 (b)(1) and Figure UG-41.1sketch (a)". I understand these are shear...
  17. curtis2004

    Using existing building steel for piping supports

    Hi everyone, During maintenance projects which involve replacement or a new piping projects very often existing building steel is used to support a new or replacement system. Usually big building steel beams and columns are used to support pipe, if pipe loads are small. However, is there any...
  18. curtis2004

    Design pressure and pressure thrust

    Hi Everyone, I have question regarding pressure thrust calculations of an expansion joint. I have design pressure of my piping system stipulated 150 psig @ 86 F. It's steel piping installed in intake and discharge of a centrifugal pump. Intake pressure is 10' of water head max, and discharge...
  19. curtis2004

    Pressure stiffening rings for Internal pressure design.

    Hi everyone, I have a cylindrical pressure vessel with conical bottom in process plant. Top of the vessel is open to atm. Pressure is exerted only by liquid's column height. The vessel also has stiffening rings welded outside of it. 1. I have looked ASME Section VIII, Div.1 and it describes...
  20. curtis2004

    SA-516 Gr70 material stress values from ASME 1995 code edition

    Hi All, If somebody have stress values for SA-516 Gr.70 from ASME 1995 edition, I really appreciate it. I believe it was safety factor 4.0 at a time. Thank you, Curtis

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