Welding inspector interview question answer
| Q:- What is the standard for Process (or) Plant piping systems? |
| Answer: ASME B 31.3 |
| Q:- What is the standard for Power Piping systems? |
| Answer: ASME B 31.1 |
| Q:- What is the standard for liquid Petroleum Transportation piping systems? |
| Answer: ASME B31.4 |
| Q:- What is the standard for Gas Transmission and Distribution piping systems? |
| Answer: ASME B31.8 |
| Q:- What is the Code for Welding of Pipelines and Related facilities? |
| Answer: API 1104 |
| Q:- What is the standard for welding rods Electrodes and filler metals? |
| Answer: ASME Sec-IIC |
| Q:- What is the standard for Non-destructive Examination? |
| Answer: ASME Sec-V |
| Q:- What is the standard for welding and Brazing Qualifications? |
| Answer: ASME Sec-IX |
| Q:- Which type of process we are using in field/fabrication shop? |
| Answer: Fusion welding |
| Q:- What is the specification/classification for carbon steel filler wire? |
| Answer: AWS 5.18/ER70-Sx |
| Q:- What is the specification/classification for carbon steel Electrode? |
| Answer: AWS 5.1/E-XXXX |
| Q:- Where we can use E-6010 type electrode? |
| Answer: we can use at root pass for deep penetration |
| Q:- What is the meaning for ASME? |
| Answer: American Society for Mechanical Engineering |
| Q:- Which type of electrode we are using in GTAW process? |
| Answer: Non-Consumable Tungston Electrode |
| Q:- How Many times we can dry the electrodes? |
| Answer: Only one time |
| Q:- Why we are baking the electrodes? |
| Answer: To remove the moisture content from the Electrodes. |
| Q:- What is the standard for Structural steel fabrication? |
| Answer: AWS D1.1 |
| Q:- What is the standard for Welding symbols? |
| Answer: AWS A2.4. |
| Q:- What is the hydrotest pressure? |
| Answer: 1.5 Times of design pressure. |
| Q:- What is the drying temperature for Stainless Steel electrodes? |
| Answer: 120 to 250 degree temperature. |
| Q:- What is the drying procedure procedure for Low hydrogen electrodes? |
| Answer: 260 to 430 degree temperature, baking for two hours |
| Q:- What are the defects we can find in visual Inspection? |
| Answer: Porosity, Undercut, Surface crack (HIC), Side wall fusion on fusion boundary. |
| Q:- What is the Procedure for Fit-Up inspection? |
| Answer: Base metal classification, cleaning, Alignment, root gap, root face, bevel angle & mismatch (or) overlap. |
| Q:- What is the internal overlap (or) mismatch for piping? |
| Answer: 1.5 mm. |
| Q:- How much root face are allowed? |
| Answer: As per WPS (or) 0.8 to 1.6 mm |
| Q:- What is meaning for F – Number? |
| Answer: F- is filler metal grouping Number. |
| Q:- What is meaning for P – Number? |
| Answer: P – is base metal grouping Number. |
| Q:- What is meaning for A – Number? |
| Answer: A – is electrode chemical analysis number. |
| Q:- How much bead width we can allow? |
| Answer: Max 3 times of electrode diameter. |
| Q:- How much area is required for Pre-heat? |
| Answer: 75 mm minimum from both end of the Joint. |
| Q:- Which section we are using for NDT? |
| Answer: ASME Sec-V |
| Q:- What are the essential variables for SMAW process? |
| Answer: In base metal thickness, P-number, dia of pipe, pre, post weld heat treatment |
| In filler metals F, A-numbers, dia |
| Q:- What are the essential variables for GTAW process? |
| Answer: In Base Metal thickness, P-number, diameter of pipe, pre, post weld heat treatment… In Filler Metals F, A-numbers, diameter of filler metal |
| Q:- If welder made test by 2’’ dia, what is his range qualified? |
| Answer: He has qualified 1’’-dia and above. |
| Q:- If welder made test by 14 mm thickness, what is his thickness range qualified? |
| Answer: He has qualified unlimited thickness. |
| Q:- What is carbon % in low carbon steel? |
| Answer: Max 0.30 % |
| Q:- What is the inter-pass temperature for carbon steel materials? |
| Answer: Max 315’C |
| Q:- What is meaning for SAES,SAEP and SAMSS? |
| Answer: Saudi Aramco Engineering Standards |
| Saudi Aramco Engineering Procedures |
| Saudi Aramco Materials System Specification. |
| Q:- How much under cut depth allowed in piping? |
| Answer: 0.8 mm |
| Q:- How much area is required for Pre-heat? |
| Answer: 75 mm minimum from both end of the Joint. |
| Q:- How much percentage is allowed more than test pressure in Pressure relief device? |
| Answer: Test pressure plus10% (10% should be lesser than 50Psi). |
| Q:- How much gap is allowed in socket weld? |
| Answer: 1.5 mm minimum before welding. |
| Q:- What is the minimum fillet size in socket weld? |
| Answer: Minimum 3 mm fillet size. |
| Q:- What are the Hydro test Procedure and requirement? |
| 1. Piping Internal Cleaning |
| a. Air compressor |
| b. Air blower |
| c. Electrical cable |
| d. Generator |
| c. Wire brush |
| d. cotton waste cloth |
| e. water tanker water with pump |
| 2. Testing |
| a. Pressure gauge-(30days calibration valid, range 1.5 to 2 times test pressure) |
| b. Test manifold (calibration validity) |
| c. Pressure relief valve( Set to 5% above test pressure) |
| d. Test pump |
| e. Water tank |
| f. Hoses |
| g. Test blind |
| h. Test water (refer as per project specification) |
| II. What are the documents required for Test package ? |
| 1. Calibration Certificates of Gauges ,relief valves |
| 2. P&ID and ISO Drawing |
| 3. Test Package Control sheet |
| 4. Marked up P&ID |
| 5. As built Drawing |
| 6. Welding log |
| 7. NDE report |
| 8 .Punch list –all punch list cleared (category one) |
| 9. Pressure test Check sheet |
| 10. Safety check lists |
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Lots wonderful. Sir .very easy your guidance. Lots proud of you sir