Valves are used for main three purposes listed below. For Isolation of flow. For Regulation of flow. For avoiding the reversal of the flow. The valves used for isolation cannot be used for regulation but other way round is possible. Various types of valves. 1) Gate valve 2) Ball valve 3) Plug valve 4) Butterfly valve 5) Globe valve 6) ... Read More »
This figure depict a very small and simplified P&ID: P&ID shows all of piping including the physical sequence of branches, reducers, valves, equipment, instrumentation and control interlocks. The P&ID are used to operate the process system. A P&ID should include: Instrumentation and designations Mechanical equipment with names and numbers All valves and their identifications Process piping, sizes and identification Miscellaneous ... Read More »
These valves are self operated type. They have actuators. Actuators operate on the signal received from an instrument. They are used for very fine throttling and to have desired process parameters (pressure, temperature, flow) of fluid. Control valves can be of the following types based on parameters to be controlled: 1) Pressure control valve – Receives signal from pressure indicator ... Read More »
1.What is the maximum time limit to test backfilled portion? 24 Hr 2.For the line whose joints have not been backfilled what is the maximum time limit for testing ? 04 Hrs 3.a)What is the minimum number of gauge to be used in pressure testing ? Two b) What should be its ranger as per ASME .sec VIII As per ... Read More »
1.What is the discharge pipe that is flow condition and that extends from the lift station carrying sewage under pressure ? Force main 2 .Where will the drain from battery rooms battery rooms before discharge to the sanitary sewer line ? Neutralization Tan 3.What is the minimum size of sewer lines that are allowed to be embedded unde slab? 64mm ... Read More »
1. What is the procedure for application of wrapping and coating? Procedure for application of coating and wrapping: – A. Prior to application of wrapping & coating, the surface of pipe should be made free from all loose mill scale, dirt, rust, grease, moisture and other foreign material. This is achieved by blast cleaning to grade Sa 2 ½ . B. ... Read More »
Top Courses in Engineering Design PDMS Training 3+ Live Projects 700+ Interview Questions 24/7 E-learning Access SP3D Training Certified Trainer 700+ Interview Questions Job Assistance PDS Training 40+ Mock test 20+ Sub Topic Job Assistance Intools Training 3+ Live Project 20+ Sub Topic Expert Mentors Tekla Training 70 Hours Instructor Led Training Mentoring Support 24/7 E-learning Access Microstation Training Certified ... Read More »
18. Why do we provide drip leg in steam line? To remove condensate when there is a rise of same in the pipe along the flow direction. If drip leg is not provided in steam line, the condensate which forms inside the pipe will result in water hammer effect causing damage to piping system. 19. What is the design standard followed for ... Read More »
7. What are the other stresses against which the design of piping is safe guarded? A. Principal stress. B. Shear stress. Apart from the stress which is normal to the surface of the crystal as mentioned in question No. 4, the grains would have been oriented in the pipe wall in all possible orientations. The above stresses (axial, circumferential and radial stress) ... Read More »
1. What are primary loads? Mention some of primary loads? These are typically steady or sustained types of loads. These loads have their origin in some force acting on the pipe causing tension, compression, torsion etc leading to normal and shear stress. Primary loads are not self limiting. Some of the primary loads are as:- A. Internal fluid pressure B. External ... Read More »
Oil And Gas Club