Aarvi Encon Interview Questions, Process, and Tips

The complete process of a cross country pipeline project involves planning, design, construction, testing, and commissioning.

• Planning phase: Identify project objectives, route selection, environmental impact assessment.

• Design phase: Engineering design, material selection, pipeline alignment.

• Construction phase: Clearing and grading, trenching, welding and joining, coating and insulation.

• Testing phase: Hydrostatic testin...read more

Various codes and standards are followed for laying pipelines to ensure safety and quality.

• API 1104 - Welding of Pipelines and Related Facilities

• ASME B31.4 - Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids

• ASME B31.8 - Gas Transmission and Distribution Piping Systems

• ISO 13623 - Petroleum and Natural Gas Industries - Pipeline Transportation Systems

• DOT Pipeline Safety Regulations - Title 49 CFR P

Hydrotest is a pressure test conducted on pipelines to check for leaks and structural integrity.

• Hydrotest involves filling the pipeline with water and pressurizing it to a specified level.

• The pressure is maintained for a specified duration to check for leaks or any other defects.

• The test also checks the structural integrity of the pipeline by measuring the amount of deformation under pressure.

• The test is usually conduc...read more

Hydrotest is a process of testing the strength and integrity of pressure vessels and pipelines using water pressure.

• The equipment used for hydrotest includes pumps, hoses, valves, and pressure gauges.

• The first step is to fill the vessel or pipeline with water and remove any air pockets.

• The second step is to gradually increase the water pressure to the desired level and hold it for a specified duration.

• During the test, ...read more

The instrument used in joint coating process is a profile gauge. Acceptance criteria for surface roughness is specified in the project specifications.

• Profile gauge is used to measure the surface roughness of the joint coating.

• Acceptance criteria for surface roughness is specified in the project specifications.

• Surface roughness is measured in microns or mils.

• The surface roughness should be within the specified range for

Vent pipe is used to equalize pressure and prevent damage to the casing during drilling and installation of pipelines.

• Vent pipe is installed in the annular space between the carrier pipe and the casing.

• It allows air to escape during installation and equalizes pressure during operation.

• It prevents damage to the casing due to pressure buildup.

• It also allows for monitoring of the annular space for leaks or corrosion.

• Prope...read more

Major defects in welding include porosity, cracks, incomplete fusion, and distortion.

• Porosity: caused by gas entrapment in the weld pool. Can be prevented by proper shielding gas and electrode selection.

• Cracks: caused by high stress or improper cooling. Can be prevented by controlling heat input and using preheat/ post-weld heat treatment.

• Incomplete fusion: caused by insufficient heat or improper technique. Can be prev...read more

WPS, WQT, PQR, and PQT are all related to welding processes and qualifications.

• WPS stands for Welding Procedure Specification and outlines the welding process to be used.

• WQT stands for Welder Qualification Test and is used to qualify a welder's skills.

• PQR stands for Procedure Qualification Record and documents the results of a welding procedure qualification test.

• PQT stands for Performance Qualification Test and is use...read more

Disbondment in cold bend pipe can be checked using visual inspection, ultrasonic testing, and radiography.

• Visual inspection can detect disbondment on the surface of the pipe.

• Ultrasonic testing can detect disbondment in the pipe wall by sending high-frequency sound waves through the pipe and analyzing the reflected waves.

• Radiography can detect disbondment by using X-rays or gamma rays to create an image of the pipe and ...read more