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  • Users: racp12
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  1. racp12

    Hydrostatic testing for aboveground piping-NFPA 13

    I am reviewing a document on testing a wet pipe sprinkler system . Piping is aerial, with hanger supports. On NFPA 13, I found information for hydrostatic testing under Chapter 10-Underground Requirements, but I cannot find requirements for aerial piping. I suppose that due to my lack of...
  2. racp12

    Biphasic flow pipeline û B3!.4 or B31.8?

    For designing a 16”, carbon steel pipeline, for diluted crude oil transportation, we have found that flow is approximately 50% liquid and 50% gas. We have read both the scopes for ASME B31.4 and B31.8, but we are doubtful about the applicable standard for this case. We would appreciate very much...
  3. racp12

    IFR atmospheric storage tanks - double deck vs single deck

    For an atmospheric storage tank, capacity 170 Mbls, internal diameter 44 m, fluid methanol, it is required internal floating roof, full contact with the fluid. Code is API 650 11th ed. My concern is regarding the type of IFR. Single or double deck?
  4. racp12

    API 650 App. K - shell thickness

    Regarding API 650, 11th ed. with Addendum 1, I am doubtful about some statements regarding wall thickness. According to para. 5.6.4.2,"required shell thickness for each course shall be the greater of the design shell thickness plus corrosion allowance (t1d) or the hydrostatic test shell...
  5. racp12

    NFPA 30:Minimum Tank Spacing

    I have no available at this time the 2008 edition of NFPA 30, and I need to know if there is any change for Table 2.3.2.2.1 Minimum Tank Spacing (Shell to Shell), as it is shown in the 2000 edition.
  6. racp12

    API 5L SR4 - NDT for seamless pipe

    I am preparing a Purchase specification for API 5l X-52 26" OD seamless pipe. Regarding NDT, API Specification 5L, Forty-Third Edition, March 2004 (which is still in force), makes reference to Supplementary requirement SR4, Appendix F, but... There is no SR4 paragraph under App F. My question...
  7. racp12

    API 10000

    In thread thread 809-60021, and in some high pressure fitting and valve catalogs, I have read the term "API 10000". I had thought that it was a reference to an API standard, but, I could not find that term in the API website (www.api.org). My question is: What is API 10000?
  8. racp12

    monolithic insulating joints or insulating kits?

    I am involved in a natural gas 36”OD, API 5L (grade not yet defined) pipeline project in Venezuela. Regarding Cathodic protection for valve stations, a colleague told me that use of monolithic insulating joints is obsolete; therefore insulating kits (gasket, sleeves and washers) must be used. My...
  9. racp12

    NACE withdrawn publication 6G-164

    Which publication or standard supersedes or replaces NACE withdrawn publication 6G-164 "Surface Preparation Abrasives for Industrial Maintenance Painting"?
  10. racp12

    Buried Pipeline - Acceptable out of roundness

    I have to calculate the effects of live loads on a buried pipeline, 26". Among those effects, some ovalisation may occur. My question is: What is the acceptable maximum out of roundness, which will not obstruct cleaning and inspection tool passage?
  11. racp12

    NDE for pipeline welded branch

    For the construction of a 26" OD, wall thickness .375" NGL pipeline, API 5L Gr.X52, DP=900 psig, I have specified 100% radiographic inspection for butt welds in accordance with owner's practices. My concern is regarding branch welds. For this case, is ultrasonic examination more adequate than RT?
  12. racp12

    API 1102: Doubt on Longitudinal stress calculation

    I make reference to API 1102 "Steel Pipelines Crossing Railroads and Highways" 6th Edition, April 1993, Appendix B, Uncased design examples, B.1 Highway crossing design. Under Design information, data for Installation Temperature, T1, Maximum or minimum operating temperature, T2, and the...
  13. racp12

    Location class for B31.4

    Why ASME B31.4 has no mentions to location class as in B31.8? This question arose during the conceptualization of a 65 mile length, 26” OD, NGL pipeline project

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