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Recent content by sayee1

  1. sayee1

    Transfering of PQR weldpass average or single values to WPS

    Note that ISO definition of heat input is different from ASME, with ASME HI defined as arc energy by ISO. I am going by the ADME definition here same as everyone else, assuming that is the language you use. Irrespective of this I am amazed that this question gets asked so many times. A WPS is a...
  2. sayee1

    Clad pipe to Clad pipe Welding.

    Kardo-Lincoln and Esab-I vaguely remember it as Ok53.xx In any case these free iron buffers have been used in the past only for ss and experience on inconel is limited. The welding of three different layers needs a lot of skill especially to minimise dilution when depositing the buffer layer...
  3. sayee1

    Welding of duplex steel

    In addition to Metengr's recommendations 1. HI should have both min and max restrictions as these influence the % ferrite/austenite 2. Most single sided butt/groove welding procedures for DSS for corrosion resistance will need high purity Ar backing with oxygen level monitoring using purge...
  4. sayee1

    Welding of duplex steel

    E/ER 2209 Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  5. sayee1

    Welding electrode storage

    See link below for free download on storage and handling http://www.esab.com/ESABHtml/pdf/Handling%20&Storage%20of%20Consumables(1).pdf Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  6. sayee1

    Amperage check on a welding machine.

    The best is to use a tong tester and use it close to the point of welding on the return cable (Earthing) Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  7. sayee1

    PWHT of Inconel 625 cladding

    Only thing to remember and ensure that the PWHTtemperature is lower than the tempering temperature of the Q&T for F65 Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  8. sayee1

    PWHT of Inconel 625 cladding

    See NACE MR 0175, page 14, clause 5.2.1 states "Overlays applied to carbon and low alloy steel or to martensitic stainless by thermal processes such as welding, silver brazing, or spray metallizing systems are acceptable for use in sour environments, provided the substrate does not exceed the...
  9. sayee1

    Titanium Welding

    Huntingdon fusion techniques limited www.huntingdonfusion.com Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  10. sayee1

    qualifying tube to tube sheet welds

    MJC ypically a T to T/sht weld can be a seal weld if the expansion of tubes into grooves in t/sht is giving the strength. However it is possible to use welding for strength and expansion of tubes for strength as well and in rare cases both expansion and welding contributing to strength. Refer...
  11. sayee1

    What is the best engineering advice you ever received?

    NiM: Do it right the first time, everytime, and ON TIME!!! Keano: "If its not written down it never happened." Which I read somewhere else as "If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!" "Imagination is more important than knowledge...
  12. sayee1

    Tig Pulse Welding

    Send me your email address by text message on my cell phone (00971507682668)number. I'll send some good writeups on Pulsed GTAW welding. Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  13. sayee1

    Heat treatment of AISI 321 stainless steel

    Bagnamento's question was probably misunderstood. ASM clearly defines stabilized annealing for 321 tyope materials as folliows "It is carried out where maximum corrosion resistance of stabilized stainless steels of type 321 is required. The heat treatment involves heating to the range 1550-1650...
  14. sayee1

    AC vs DC for demagnetising

    Thanks guys for reconfirming my understanding on the usage of DC. A star for each of you. Thanks and regards Sayee Prasad R CEng MWeldI MIOMMM If it moves, train it...if it doesn't move, calibrate it...if it isn't written down, it never happened!
  15. sayee1

    AC vs DC for demagnetising

    During welding of cs pipelines (API 5L X 52-65 grades) especially the residual magnetism is the pipes (due to say induction heating during the coating) could cause problems during welding. Now traditionally, the equipment for demagnetising are AC equipment. I was told however that the welding...
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