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  • Users: jonjose123
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  1. jonjose123

    Settlement of Oil Pipeline due to Leakage of Water Pipeline.

    Here we have an issue with recently oil pipeline. pipeline 20" oil pipeline crosses water pipeline (1000mmx3 nos) corridor Oil pipeline encounter settlement caused by leakage of water pipeline passing under 20" oil pipeline. Water pipeline is 4 m below crude oil pipeline. The ground...
  2. jonjose123

    Pipeline Pig Tracking

    Hello Members, Currently, there was a observation/clarification from operations stating that 20" buried Gas pipeline crosses many other pipelines and hence it will be difficult for pig tracking. Project is under finalisation stage in terms of routing and operations and stating this comment. We...
  3. jonjose123

    Pipeline road crossing culvert replacement

    Hi All, We have an existing culvert which carries 3 pipelines of 6" crossing an Asphalt road. These culverts are to be replaced . What precautions should we take to protect the pipes under road while replacing the culvert. The pipes are kept at a separation of 1 m from each other.
  4. jonjose123

    Design of large Diameter flanges (64") not covered by ASME B16.47

    Hi Dear Members, We have a Pipeline system which is 64” which is designed as per ASME B 31.4 design code. Would like to know if the flanges for this pipeline system can be designed as per ASME Sec VIII Div I by providing design parameters to vendor. Or is there any other design code to be...
  5. jonjose123

    Mobile Pig Traps & Key Interlock

    Hi All, Do we need to provide key interlock for Mobile Pig Traps... Pig trap Size is 10" x 6".. As per Company only the main line valve and kicker line valve to key interlocked. This mobile pig trap will be used for 10 flow lines...and there are existing flow lines in the field another 15 not...
  6. jonjose123

    Anchor Block Mitigation in Pipeline

    Hello All, Currently we are designing a pipeline 12" CS (API 5l X 52) with a design pressure of 140 barg and design temperature of 93 deg c. The length of the pipeline is 1.6 km. We wanted t o remove the requirement of Anchor block. currently we are trying to change the routing to station...
  7. jonjose123

    Measures to Allow Pipeline Expansion

    Hi All, Good Day! We have an aboveground pipeline 6" with design pressure of 140 barg and design temperature of 93 deg c. In order to make allowance for thermal expansion, expansion loops are proposed. However, in the handbook of Pipeline Engineering by Henry, there mentions about certain...
  8. jonjose123

    Size Limitation to use Seamless Pipe

    Hi All, Is there any size limitation to use seamless pipe in oil and gas application. In the tender client has mentioned to use seamless pipe for less than 16" size. Regards, B
  9. jonjose123

    D/t ratio of 107

    Hi All, We have a pipeline of 42" with wall thickness of 9.5 mm which accounts for D/t ratio of 107. Stress Point of view this satisfies. However, code (DEP) specifies the D/t ratio to be less than 96. Is there any particular reason other than handling problems. The pipe is buried and is of...
  10. jonjose123

    Stress Analysis Design temperature for Multiphase fluid

    Hi All, We have a 8" pipeline material API 5L X65 and 5 km buried line. Design temperature is 105 deg c where as operating temperature is 75 deg c. We have question on what shall be the temperature to be used in analysis. We have used 105 deg c and the system shows over stressed on bends. Is...
  11. jonjose123

    Elastic Bending Radius

    Hi All, Our Pipeline Details are 219.1 mm OD, WT 7.04 mm CA=3mm, DP 70 barg Tdesign = 83 deg and T min = -5 deg c. Pipe material API 5L X60 Based on the above The minimum elastic bending radius calculated is 250 m. However, if I use the WT as 6.35 mm the minimum elastic bending radius required...
  12. jonjose123

    Pipeline Hydrotest Pressure Calculation

    We have a 52" Gas Pipeline API 5L X65 With wall thickness of 20.5 mm. Our question is how do we calculate the Hydrotest pressure at the highest point and at the lowest point along the route. The length of pipeline is 8 km. We have calculated teh max Hydrotest pressure as P = 2*WT*SMYS/OD. Need...
  13. jonjose123

    End Seals/ Centralizers and Spacers for casing Pipe

    Hi All, We have a 28" GRE Pipeline which crosses highways and other major roads. These crossings are to be cased crossings as per Client. I would like to get your all expertise on selection of numbers of end seals and spacers. Is there any calculation for the same. Cheers
  14. jonjose123

    Quick Opening Closure For Pig Trap

    Hi All, We have a situation during detailed engineering, that the Quick opening closure as per FEED is to be designed as per ASME sec VIII Div 1 and "U" stamped. However, we found that the ASME Sec VIII Div 1 is applicable only till pressure limiting to 20 MPa. Our design pressure is 21.5MPa...
  15. jonjose123

    Pigging of GRE pipeline

    Hi All, Currently our project involves a 28" GRE pipeline. We would like to know if GRE pipeline can be used for intelligent pigging and also what shall be the minimum bend radius for GRE bends to allow passage of pig.
  16. jonjose123

    Hydrotest

    Hi All, I have a question regarding the hydrotest. We have a pipeline of size 8 inch. The design pressure is 215 bar, installation temp is 13 deg c an dwall thickness is 7.3 mm with 0 mm corossion allowance. While doing the calculation for equivalent stress during hydrotesting the system...
  17. jonjose123

    PE Liner Collapse Pressure

    What should be collapse pressure to be considered for design of HDPE liner pipe used for lining purspose inside CS pipeline or flowline. We believe it should be maximum of 1 bar (atm.p) but some specifications shown collapse pressure shall consider as 3.0 bar while design of liner. Is there any...
  18. jonjose123

    Pig Trap Nozzle

    Hi All We have Pig trap 24 x 18” and the balancing line nozzle is 4”. Client asking for extruded branch for this nozzle, where as we have provided Pipe in pipe branch. My question is if Reinforcement is required for this.
  19. jonjose123

    PWHT Requirement

    We are currently doin a project in which 24" x 18 " pig traps are used. the thickness of major barrel is 12.7 mm and of that of the minor barrrel is 10.9 mm. and it is designed as per ASME B31.4. DOes the requirement of PWHT applicable. AS per ASME B31.4, PWHT is applicable only when the wall...
  20. jonjose123

    Pig Trap Nozzle reinforcement

    Hi All, we have a Pig trap to be designed and procured, size is 24" x 18", wall thickness of 11.31 mm. Clinet asks for reinforcement of nozzles. Can you guys help me with , which codes to be followed.. The pig trap to be designed as per ASME B31.4..

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