Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
q use of stainless steels in weldingconsiderable care must be exercised to obtain sound crack-free welds these difficulties are pronounced when
q carbon and low alloy steels for weldingall welding of pressure retaining equipment must be completed as per the respective code typically ansiasme
cobalt-base super alloys eg uns r30155 grade 661 and r30816 grade 671 have superior strength to the nickel base alloys above 1800degf 980degcthe
q show general properties of castings1 fe-cr 10-30cr alloys offer good resistance to oxidation low strength at elevated temps restricted to use in
q material selection by temperature range 750deg to 1100degf 400deg to 600degc plain carbon steels are usually limited to a maximum operating
q describe polythionic acid corrosionalthough it is not typically thought of as high temperature corrosion polythionic acid stress corrosion cracking
q explain about napthenic acid corrosionsome crude oils contain napthenic acids which at elevated temperatures may contribute to more active
q what do you understand by carburizationcarburization is initiated by the adsorption of carbon in contact with the surface of the metal and may
q explain sulphidation processthe presence of sulphur converts the surface of the metal to a sulphide scale which is generally more destructive than
q define oxidation processoxidation is defined as a loss of electrons as when a metal goes from the metallic state to the corroded state when a
q environmental factors for high temperature service materialsmany environmental factors must also be considered when choosing a material for high
q overall deformation of a componentthe overall deformation of a component is a function of the applied load the materials creep rate the maximum
q expected service life of a component in high temperature environmentthe expected service life of a component in a high temperature environment is
q what is system prompton loading or switching to dos the screen displays c gt cgt a gt or a similar message the message displayed by dos is called
q mechanical properties of high temperature strength of metalsthe high temperature strength of metals is related to their melting points but many
q factors in the design of high temperature materialsthere is typically little correlation between room temperature strength and high temperature
q selection of metallic materialsthis engineering practice has been written to assist those involved in the construction of new equipment and for the
q shipping of steel pipespipe will be transported from the coating yard to the job site as specified in the purchaser order the applicator will
q stacking in the applicators storagestacking in the applicators storage yard shall be in accordance with good safety practices andor owner
q patching touch up stickpipe requiring limited coating repair resulting from scars slivers holidays etc shall be repaired by an owner approved
q explain coating repairsany coatings found to be damaged or that do not pass the inspection stage shall be recoated or repaired at the expense of
q production test ringsthe frequency for the tests shall be as followsbullone sample at the 10th jointbullone sample at the 75th jointbullone sample
q identification of defects of coatingall holidays and other coating defects including without limitation primer blister excess powder mounds crazed
q what is holiday detectioneach length of coated pipe shall be checked for holidays with a high quality heavy duty full wave rectified non pulsating
q what is coating thicknessthe dry thickness of the coating shall be checked by using a micro test magnetic gauge or approved equal which has been