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q explain about ducts and flues in steam generatorsall air ducts and gas flues connecting the forced draft fan fan intake silencer preheater and
q working of burner assembly in steam generatorsthe steam generators shall be equipped with a packaged burner assembly consisting of a burner
q combustion chamber and radiant sectionthe combustion chamber and the radiant heat transfer section of the steam generators shall be a horizontal
q general design requirements for steam generatorsthe steam generators shall be once-through type with a parallel-pass arrangement direct fired and
q external coatings on vesselsall pressure vessels that will be installed underground shall have an external coating applied according to the
q requirements for vessels with thicknessthe following additional requirements are applicable as specified to carbon steel and low alloy steel
q inspection and testing of vesselsthe vendor shall be responsible for all inspection and testing worleyparsons reserves the right to inspect vessels
q show the procedure of welding of vesselswelding of vessels including pressure retaining parts and attachments thereto shall be performed utilizing
q design the nozzle connections nozzle design shall be such that if the actual combined thickness of the shell or head and reinforcing pad exceeds 50
q nozzle design loadsminimum nozzle design loads shall be in accordancef axial force on centre line of nozzle lbs maximum transverse force 15ffr
q explain about vessel design loadsvessels and their supports shall be designed for all of the following conditionsbullerection dead weight of fully
q design pressure of vesselsthe design pressure shall be as specified on the vessel data sheetthe design pressure for a vessel in vacuum service
pressure vessel materials shall be as specified on the vessel data sheetall attachments to vessels shall be of the same lsquop number material as
construction activities for plantconstruction activities such as shoring and bracing of excavations lifting and rigging activities and scaffolding
q design stairways - ladders and platformsstairways rather than ladders should be provided for main access to elevated structures ladders should be
q design lay-down areas for plantdesignated lay-down areas are areas specifically positioned to enable equipment maintenance to be carried out these
q what is the basic working of cooling towercooling towers are generally located downwind from process units to adequately disperse vapors from
q explain about fired heaters and combustion enginesfired heaters and combustion engines shall normally be located at a safe distance from hazardous
q what is mock-up testingtube to all tubesheet weld tests shall be provided as described belowmock-up of 10 tubes about 305 mm 12 long are welded to
q what is pressure testingpressure test shall be performed after completion of all welds and the pwht of the boilerprior to final inspection and
q ultrasonic examinationultrasonic examination ut and the acceptance criteria shall be in accordance with the code and performed in accordance with
after final pwht the hardness of the deposited weld metal and heat affected zone haz shall be examined hardness values shall not exceed 200 bhn
q radiographic examination of welded jointsradiographic examination rt of welded joints shall be performed as required by the code acceptance
q explain about post-weld heat treatmentpost-weld heat treatment pwht shall be in accordance with the code pwht procedures including properly
q identification of pressure weldspressure welds shall be identified as followsagenerally each weld shall be stamped adjacent to the weld with the