Upendra Tiwari

Duties after welding- 1.Weld identification-    Each weld is marked with the welder's identification and is identified in accordance with    drawing/weld map. 2.Weld appearance-    Ensure welds are suitable for all NDT (profile, cleanness,etc).    Visually inspect welds and sentence in accordance with Code. 3.Dimensional survey-    Check dimensions are in accordance with drawing/Code. 4.Drawings-    Ensure any modifications are included on as-built drawings. 5.NDT-    Ensure all NDT is complete and reports are available for records. 6.Repairs-    Monitor in accordance with the procedure. 7.PWHT (if required)-   Monitor for compliance with procedure (check chart record). 8.Pressure/load test (if required)-   Ensure test equipment is calibrated. Monitor test to ensure compliance with procedure/Code.   Ensure reports/records are available. 9.Documentation records- ...

Duties during welding- 1.Site/field welding-    Ensure weather conditions are suitable/comply with Code (conditions will not affect welding). 2.Welding process-     In accordance with WPS. 3.Preheat (if required)- Minimum temperature is being maintained in accordance with WPS. 4.Interpass temperature-    Maximum temperature is in accordance with WPS. 5.Welding consumables-    In accordance with WPS and being controlled as procedure. 6.Welding parameters-    Current, volts, travel speed are in accordance with WPS. 7.Root run-    Visually acceptable to Code before filling the joint (for single sided welds). 8.Gouging/grinding-    By an approved method and to good workmanship standard. 9.Inter-run- cleaning To good workmanship standard. 10.Welder-      On the approval register/qualified for the WPS being used. Important point for Welding Inspector-(SE-1) https://upen...

ASME Code Key Words  shall -      mandatory rules may not- prohibition may can -recommendations or exemptions from prohibitions  should-    recommendations  Pressure Vessel Inspection as per ASME SEC VIII DIV.1 Subsection A:  UG – General Requirements Subsection B: Methods of Fabrication  UW – welded pressure vessels  UF – forged pressure vessels  UB – brazed pressure vessels  Subsection C: Classes of Material - Special Constructions  UCS - Carbon and Low Alloy Steel  UNF - Non ferrous Materials  UHA - High Alloy Steel  UCI - Cast Iron  UCL - Cladding and Lining  UCD - Cast Ductile Iron  UHT - Ferritic Steels with Heat Treatment  ULW - Layered Constructions  ULT - Low Temperature Service  UHX - Shell and Tube Heat Exchanger Mandatory and Nonmandatory Appendices Index Important clauses/points/paragraphes/tables are ...

Section I - Steam Boilers S steam boilers (master) A assembly only E electric boilers M miniature boilers PP power piping (B31.1) V * safety valves Section IV - Heating Boilers  H * cast iron heating boilers H wrought steel heatig boilers HLW potable water heaters HV * safety valves National Board Inspection Code  R repair and alteration VR* repair of safety valves Section VIII Div. 1 - Pressure Vessels U pressure vessels UM * miniature vessels UV * safety valves UD * rupture disk devices Section VIII Div. 2 - Alternative Rules U2 pressure vessels Section VIII Div. 3 U3 High Pressure Vessels UV3* safety valves Third Party Inspection for Pressure Vessel – https://upendratiwari786.blogspot.com/2019/12/third-party-inspection-for-pressure.html

Duties before welding- 1.Material      In accordance with drawing/WPS.Identified and can be traced to a test certificate.    In suitable condition (free from damage and contamination). 2.WPSs     Approved and available to welders (and inspectors). 3.Welding equipment -    In suitable condition and calibrated as appropriate. 4.Weld preparations-     In accordance with WPS (and/or drawings). 5.Welder qualifications-    Identification of welders qualified for each WPS to be used.    All welder qualification certificates are valid (in date). 6.Welding consumables    Those to be used are as specified by the WPSs, are stored/controlled as specified by the QC     procedure. 7.Joint fit-ups-    In accordance with WPS/drawings tack welds are to good workmanship standard and to code/WPS. 8.Weld faces-     Free from defects, contamination ...

Typical documents that may need to be referred to are: The Application Standard (or Code) Quality plans or inspection check lists Drawing QC procedures Guidance and basic requirements for visual inspection are given by: ISO 17637 (Non-destructive examination of fusion welds - visual Examination) Conditions for Visual Inspection (to BS EN ISO 17637)-     Illumination-               350 lux minimum required. (recommends 500 lux - normal shop or office lighting).    Vision access-               Eye should be within 600mm of the surface.              Viewing angle (line from eye to surface) to be not less than 30°.                                                       Weld Terminology...

1.Thickness Range for WPS-as per  ASME Sec-IX 2.For Welder Qualification Performance Test as per  ASME Sec-IX (Thickness Range)- 3.For Welder Qualification Performance Test as per  ASME Sec IX  (OD Range)- 4.Heat Input as per  ASME Sec IX QW-409.1(a) 5.For Base Metal as per  ASME Sec-IX P Number Check by Table QW-422 G Number Check by Table QW-422 6.For Filler Metal or Electrode as per  ASME Sec-IX F Number Check by Table QW-432 A Number Check by Table QW-442 Previous Topics- https://upendratiwari786.blogspot.com/2019/12/forging-definition.html https://upendratiwari786.blogspot.com/2019/12/casting-definition-and-defects.html https://upendratiwari786.blogspot.com/2019/12/common-defects-of-steel-forgings.html https://upendratiwari786.blogspot.com/2019/12/difference-between-codestandard-and.html https://upendratiwari786.blogspot.com/2019/12/raw-material-identification-rmi-mtc.html https://upendratiw...

Definition- A flange  is a method of connecting pipes,valves, pumps and other equipment to form a piping system.   Flanged  joints are made by bolting together two  flanges  with a gasket between them to provide a seal. There are three combination are used together (flange,gasket and bolting) . Important  Pipe Flanges used in Oil and Gas Field- Weld Neck Flange Blind Flange Socked-Welded Flange Lap Joint Flange Slip-on  Flange Threaded Flange 1.Weld Neck Flange- 2.Blind Flange- 3.Socked-Welded Flange- 4.Lap Joint Flange- 5.Slip-on  Flange- 6.Threaded Flange- On face type there are flange faces are given below- Flat face Raised face Ring joint Tongue and groove Male and female Previous Topics- https://upendratiwari786.blogspot.com/2019/12/forging-definition.html https://upendratiwari786.blogspot.com/2019/12/casting-definition-and-defects.html https://upendr...