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  • Users: siamak60
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  1. siamak60

    necessity of painting tank bottom plates

    Hi everyone As you know corrosion protection of storage tank bottom plates are prohibited by two way:1)applying coal tar epoxy or bitumen on external surfaces of bottom plates and 2)cathodic Protection by impressed current method and in Design Criteria it is assumed that half surface of Bottom...
  2. siamak60

    bonding procedure specification(BPS)

    Hi every one I want to get a sample for our PQR in GRP piping which can support appropriately our Bonding Procedure Specification based on Asme B31.3 (non-metallic Part). but despite an obvious state like WPS which is referred to Asme sec IX, there is no obvious list of essential variable(except...
  3. siamak60

    essential variable of DNV OS f-101

    Hi I'm new to DNV standards, wps preparation of mentioned standard is based on appendix c. One of the essential variable in base material is manufacturing Process(rolled,forged, cast,...). I wanted to know if we get one of our PQR on a pipe(made by rolling and welding) to flange(forged) then...
  4. siamak60

    essential Variable of DNV os f-101 marine pipeline

    Hi I'm new to DNV standards, wps preparation of mentioned standard is based on appendix c. One of the essential variable in base material is manufacturing Process(rolled,forged, cast,...). I wanted to know if we get one of our PQR on a pipe(made by rolling and welding) to flange(forged) then...
  5. siamak60

    etching austenitic stainless steel after PWHT

    Dear Friends Thanks for your Consideration Nozzle Material is 316L and it's carbon content is about 0.03% and the equipment is solvent absorber Column Designed Based on PD 5500 with Design Temperature of -46/+85 degrees of celsius and design pressure is about 82 bar and operating temperature...
  6. siamak60

    etching austenitic stainless steel after PWHT

    Hi One of our subcontractor send us a deviation which describes that a carbon steel Pressure vessel which some of it's nozzles are made from stainless steel shall be PWHT at temperature about 620 degrees of centigrade, and as it is forbidden in our specification to do PWHT on s.s materials; he...
  7. siamak60

    EFRT-Emergency drains

    AS you know emergency drains are intended to save external floating roof from being immersed. I believe that you can redirect water from some adjacent deck support by drill a hole in their body and then place a short hose in each one, in this way your hose will not interfere with flexible...
  8. siamak60

    Clarification on IMPACT Test Requirements of asme B31.3

    Hi everyone Reading ASME B31.3 and it's relevant paragraph was somehow clear to me about Impact testing Requirements but reading CASTI confused me. so: 1) If a Thickness specified for a PQR place above the relevant Curve in Fig 323.2.2A, but the upper qualified thickness of WPS;which due to asme...

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