Welding Inspector -Int
Welding Inspector -Int...
WELDING INSPECTOR INTERVIEW REVIEW 1. What is the standard for process (or) plant piping systems? ASME B 31.3 2. What is the standard for power piping systems? ASME B 31.1 3. What is the standard for liquid petroleum transportation and distribution piping systems? ASME B 31.4 4. What is the standard for gas transmission and distribution piping systems? ASME B 31.8 5. What is the code for welding of pipelines and related facilities? API 1104 6. What is the standard for welding rods Electrodes and filler metals? ASME SEC-IIC 7. What is the standard for Non-destructive examination? ASME Sec-V 8. What is the standard for welding and brazing qualifications? ASME Sec-IX 9. Which type of process we are using in field/shop fabrication shop? Fusion welding 10. What is the specification/classification for carbon steel filler wire? AWS 5.18/ER70-Sx 11. What is the specification/Classification for carbon steel Electrode? AWS 5.1/E-XXXX 12. Where we can use E-6010 type electrode? We can use at root pass for deep penetration 13. What is the meaning for ASME? American society for Mechanical Engineering 14. Which type of electrode we are using in GTAW process? Non-consumable Tungsten Electrode 15. How do handle the electrode? Different grades of electrodes shall be stored separately. It shall be kept clean, dry and properly stored according to manufacturer’s recommendations. Before use all low hydrogen electrodes shall be baked and stored in heated containers Electrodes used shall be free from rust, oil, grease, earth and other foreign matter
15. How many times we can dry the electrodes? Only one time 16. Why we are baking the electrodes? To remove the moisture content from the Electrodes 17. What is the standard for structural steel fabrication? AWS D1.1 18. What is the standard for welding symbols? AWS A2.4 19. What is the hydro test pressure? 1.5 times of design pressure 20. What is the drying temperature for stainless steel electrodes? 120 to 250 degree temperature 21. What is the drying procedure for low hydrogen electrodes? 260 to 430 degree temperature baking for two hours 22. What are the defects we can find visual inspection? Porosity, Undercut, Surface crack (HIC), Side wall fusion on fusion boundary 23. What is the procedure for Fit-up inspection? Base metal classification, cleaning, alignment, root gap, root face, bevel angle & mismatch or overlap 24. What is the internal overlap or mismatch for piping? 1.5mm 25. How much root face is allowed? As per WPS or 0.8mm to 1.6mm 26. What is the meaning for F-number? F-is filler metal grouping number 27. What is the meaning for P-number? P-is base metal grouping number 28. What is the meaning for A-number? A-is electrode chemical analysis number 29. How much bead width we can allow? Max 3 times of electrode diameter 30. How much area is required for preheat? 75mm minimum from both end of the joint.
31. Which section we are using for NDT? ASME Sec-V 32. What are the essential variables for SMAW process? In base metal thickness, P-number, die of pipe, preheat, post weld heat treatment In Filler metals F, A- numbers, dia of filler metal 33. What are the essential variables for GTAW process? In base metal thickness, P-number, die of pipe, preheat, post weld heat treatment In Filler metals F, A-numbers and dia of filler metal 34. If welder made test by 2” die, what is his range qualified? He has qualified 1”-dia and above 35. If welder test by 14mm thickness, what is the thickness range qualified? He has qualified unlimited thickness 36. What is carbon % in low carbon steel? Max 0.30 % 37. What is the interpass temperature for carbon steel materials? Max 315 degree C 38. What is the meaning for SAES, SAEP and SAMSS? Saudi Aramco Engineering Standards 39. How much undercut depth allowed in piping? 0.8mm 40. How much percentage is allowed more than test pressure in pressure relief device? Test pressure plus 10% (10% should be lesser than 50Psi) 41. How much gap is allowed in socket weld? 1.5mm minimum before welding 42. What is the minimum fillet weld in socket weld? Minimum 3mm fillet size. 43. What is the purpose of High frequency unit in GTAW process? To avoid Tungsten inclusion and arc strike 44. What is mean by suffix letter ‘G’ in electrode AWS specification? Such type of electrode is using in LTS materials. In that chemical content is less than 1% any one follows Mn, V & Mo. 45. What is the means for WPS? Collection of data which produce sound weld. (Essential, Non-Essential & Sublimentry variables) 46. What is the P-number for Cr, Mo materials? It comes under P4 & P5
47. Explain essential variables? If we adjust or change any variable in weld process, it affects mechanical properties those are called Essential variables. 48. What are the types of supports? Anchor supports, T-supports, Shoe supports, Guide supports, Pedestal supports, candy lever supports, Hanging supports, Dummy supports, Trunion supports, Wear pad supports. 49. Tell some types of flanges? Weld neck flange, Slip on flange, Blind flange, Threaded flange, Socket flange, lap joint flange 50. Tell some types of classes & purpose? 150, 300, 400, 600, 900, 1500 & 2500 Based on the class only we have to identify suitable gasket OD & ID, bolt length, nut, and torque 51. What are the types of pipes and schedules? Welded type, Seamless pipe and tubes SCH-10,20,30,40 ,60,80,XS,100,120,140,160 & XXS Based on the schedule we have to identify the suitable pipe thickness 52. Tell some gaskets? Spiral wound gasket, Composite gasket, corrugated gasket, Die cut gasket, solid metal gasket 53. Material familiar with? LTS, CS, SS, Duplex, cupper Nickel, Low alloy steel 54. Fluid service familiar with? Normal fluid, D, M-fluid services. 55. What is the string bead? Straight motion of welding, No side to side motion example-SAW weld 56. What is weave bead? Side to side motion while welding 57. How we approve the WPS? The weld should be sound weld: it has to fulfil the minimum requirement of mechanical, chemical and physical properties 58. What are the parameters required to prepare a WPS? Pipe diameter, thickness, welding position, current, voltage, electrode and base metal 59. Which is the standard using using in ARAMCO for welding requirements of pressure vessels? SAES-W-010 60. Which is the standard using in Aramco for on-plot piping?
SAES-W-011 61. Which is the standard using in Aramco for welding requirements of pipelines? SAES-W-012 62. Which is on-plot piping? Inside plant piping are called on-plot piping 63. Which is off-plot piping? Outside plant piping are called off-plot piping 64. What are the specifications used for pipe manufacturer? API 5L and ASTM 65. Why we are doing PWHT? To release the stresses 66. What is the hardness Method acceptable in procedure qualification? Vickers, Brunel’s, Rockwell hardness method