Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: svi
  • Content: Threads
  • Order by date
  1. svi

    double walled tank API 650 qualification

    thread809-204059 Why is it that there is no reference of a double-wall arrangement in the API STD, even as a reference, committee interpretations so far? Will it not need a qualification for a double-walled arrangement wherein say an 80 m steel tank is enclosed by another steel tank offset...
  2. svi

    SOUR Service chemical composition restriction and NACE ISO 15156-2 Option 1 selection

    Many Company Spec includes a restriction on the chemical composition of the steel. A typical one is like this C 0.2 wt %, Mn 1.3, P 0.01, S 0.002, Si 0.4, Cu 0.4, Ni 0.4, Cr 0.3, Mo 0.12, V 0.015, Ni 0.015, Ti 0.02, B 0.0005 A Carbon equivalence CE = C + Mn/6 + (Ni+Cu)/15 + (Cr+Mo+V)/5, limited...
  3. svi

    Triple off-set butterfly valve sealing in reverse direction

    Manufactures claim on literature that the triple off-set butterfly valves are sealing in both directions. But from experience it is known that the valve does not hold effectively against the normal flow direction. The valve standard API 609 does not address whether there is an inherent design...
  4. svi

    ASME B16.48 Spectacle blind - Thickness for RF vs RTJ

    This post was earlier made under ANSI (standards) code issues. I have flagged the entry for removal from there. I am looking at a 4" class 1500 ASME B16.48 thickness dimensions for a RF and RTJ. RF : 22 mm, is the thickness excluding the facing Female RTJ : 48 mm RTJ groove depth : 8 mm...
  5. svi

    API 6A RTJ 6B Groove with CRA overlay - Spectacle blind

    thread794-422928 API 6A gives in Table 52 the rough machining detail. The depth to which material may be removed is 8 mm for a R39 4 1/16" class 5000 groove. This is the same as the raised face available on the flange. I have a CS spectacle blind that needs to be overlayed with Inconel 625...
  6. svi

    ASTM A519 Gr 4130 mill test

    thread177-351078 The ASTM spec for low alloy tubing does not specify a mill hydro test. It is neither there in the recommended supplementary tests. A106 and A213 specs do call for mill hydro tests. What is the reasoning why the A519 excludes the mill test.
  7. svi

    Fiber Ring Joint Gasket - ASME Design

    The Klingersil C4430, a synthetic fiber gasket reports the following m and Y values for various thickness values vs the corresponding in ASME Sec VIII Div 1 Mandatory Appendix 2 for Bolted Flange design Table 2-5.1. Klingersil C4430, Thickness mm, m, Y psi 1, 4.5, 3625 2, 5, 3625 3, 5.5, 3625...
  8. svi

    weldability of A234 pipe fittings

    ASTM A234 WPB pipe fitting have a Cmax content of 0.3 and a Ceq of 0.66 corresponding to the max range of the constituents. There are specs requiring the C content limited to 0.23 and Ceq to 0.42 so as to provide weldability. Will the weldability become a problem if the C content comes close to...
  9. svi

    ASME standard for Stud bolts intended for use with Flanges

    thread292-164732 http://www.eng-tips.com/viewthread.cfm?qid=426101 I never realized this until I start to read the description of the B18.2.1 I wonder if someone can clarify what is the intent of B18.31.2 and why ASME B31.3 and B16.5 does not make reference to it?
  10. svi

    ASME Standard for Full threaded stud bolt used with Flange Joints

    The thread292-404005 says that depending on whether some free threads are to be left, either of B18.2.1 or B18.31.2 may be used. The listed standards in ASME B31.3 and B16.5 for stud bolts and nuts are B18.2.1 and B18.2.2. The descriptions of the B18.2.1 is, Square, Hex, Heavy Hex, and Askew...
  11. svi

    Pipe Fittings - Carbon content restriction in the steel used

    A typical client spec for CS Pipe fittings used in the Upstream Oil and Gas industry reads as, "All carbon steels, including normalised steels, used for the fabrication of fittings shall have a maximum carbon content of 0.23 %." ASTM A234 Gr B or C, generally used, has a C content of 0.3 to...
  12. svi

    Malleable Iron Fittings for Instrument air service

    This subject had a reference under thread404-7823, Why is that Instrument air service of 7 bar (g) pressure cannot use MI fittings. Why is it required to use class 3000 threaded forged fittings. In some cases it is required to go for class 6000. I do not see it used although allowed by B31.3...
  13. svi

    B31.3 Fillet Weld Examination

    Why does ASME B31.3 Table 341.3.2 call for RT examination of fillet welds. How should I read this. I understand that RT on fillet is difficult and others methods are to be used. I found the following reference in here, http://www.eng-tips.com/viewthread.cfm?qid=225832 but not what I am looking for.
  14. svi

    Orifice flange taps drilled at more than 1" distance from the flange face

    A pair of 4" class 1500 RTJ WN ASME B16.36 Orifice flanges, the tap location was drilled in error at 34 mm vs the 24 mm required from the flange face. The orifice plate is held in a RTJ carrier. The machinist tried to center the tap over the flange thickness. The Orifice meter is to be used to...
  15. svi

    RTJ Joint flange sealing surface hardness

    ASME B16.5 RTJ Joint detail does not specify any hardness value for the material. whereas the gasket standard specifies the hardness range that can be there for a material of the ring. Is it implicit that the hardness that is there for a CS material is a certain figure. How does one ensure that...
  16. svi

    ISO 15156-2 Vs API 5L PSL2 Pipes (ISO 3183) Sulphur content limit

    API PSL1 and PSL2 pipes have Sulphur content limited to 0.03 and 0.015%. Further it says in Annex H that PSL 1 pipes are not suitable for SOUR service. In ISO 15156-2 section A2, it says most grades of API 5L pipes are acceptable and does not make any distinction between the PSL s nor does not...
  17. svi

    Expansion joint tie rod material

    ASME B31.3 Appendix X for Expansion joints makes reference for the use of listed materials for pressure containing parts. ASTM A36 / A307 CS rods are listed material in Appendix A. Is there any code limitation other than that rods have to have the area required to hold the design pressure...
  18. svi

    ISO 7778 Z30 plates not requiring HIC testing

    Why is that HIC testing not a requirement for ISO 7778 Z30 plates.
  19. svi

    Mill hydro test pressure per ASTM A530 for A106 pipes

    What seems to be the intend of the hydro test specified through the below, Is it not a strength test. At 2500 psi, it does not seem to be. "22. Hydrostatic Test Requirements 22.1 Except as provided in 22.2 and 22.3, each length of pipe shall be tested by the manufacturer to a hydrostatic...
  20. svi

    API 521 - Trapped Liquid expansion

    Can anyone please explain from first principals the API 521 equation used for the thermal expansion and the consequent confined volume pressure increase. I want to know whether the same equation may used for a ball valve cavity pressure estimation.

Part and Inventory Search

Back
Top