Dee Piping System Interview Questions, Process, and Tips

Q1. Difference b/w power piping and process piping
Ans. 
Power piping is used in power plants to transport steam, water, and other fluids at high temperatures and pressures, while process piping is used in industrial processes to transport chemicals, gases, and liquids.
• Power piping is typically found in power plants, including nuclear, coal, and gas-fired plants.

• Process piping is used in various industries such as oil and gas, chemical, pharmaceutical, and food processing.

• Po...read more
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Q2. Latest addition of ASME B16.9
Ans. 
The latest addition of ASME B16.9 includes updates to dimensions, tolerances, materials, and testing requirements for factory-made wrought buttwelding fittings.
• The latest edition of ASME B16.9 includes revisions to dimensions and tolerances for buttwelding fittings.

• Updates may also cover materials specifications and testing requirements for these fittings.

• It is important for quality engineers to stay updated with the l...read more
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Q3. Thickness tolerance of b16.9
Ans. 
The thickness tolerance of b16.9 refers to the acceptable range of deviation in thickness for fittings manufactured according to this standard.
• The thickness tolerance for b16.9 fittings is typically specified by the manufacturer or in the relevant industry standards.

• It is important to adhere to the specified thickness tolerance to ensure proper fit and functionality of the fittings.

• For example, a b16.9 elbow may have a...read more
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Q4. Types of welding defects
Ans. 
Types of welding defects include porosity, undercutting, incomplete fusion, and cracks.
• Porosity: caused by gas entrapment during welding process

• Undercutting: excessive melting of base metal along the edges of the weld

• Incomplete fusion: lack of fusion between the weld metal and base metal

• Cracks: can be caused by rapid cooling or stress during welding
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Q5. Material grades
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Q1. Last company related questions
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Q2. Discuss salary package
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Working experience related questions.

Q1. Costing related questions.
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Q2. Technical question related to welding process.
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Q3. Knowledge of Advance Excel, process knowledge, Tooling knowledge and commerical documents knowledge must.
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Q1. What is essential variables
Ans. 
Essential variables are key parameters in welding procedures that must be strictly controlled to ensure the quality and integrity of the weld.
• Essential variables are critical parameters that directly affect the quality of the weld.

• They must be strictly controlled and monitored during the welding process.

• Examples of essential variables include welding current, voltage, travel speed, preheat temperature, and interpass te
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Q2. How will explain defferece between pqr and wpq
Ans. 
PQR is a Procedure Qualification Record which documents the welding parameters used to qualify a welding procedure. WPQ is a Welder Performance Qualification which certifies a welder's ability to produce sound welds.
• PQR is a document that specifies the welding parameters used during the qualification of a welding procedure

• WPQ is a certification that confirms a welder's ability to produce sound welds according to a qual...read more
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Q1. Wps, pqr, essential variable, material specification,ndt
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Q1. Self description, background, ctc
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