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Question Related to Post Weld Heat Treatment

post weld heat treatment

1.What is mean by  ‘PWHT’ why is required ? “POST WELD HEAT TREATMENT” this is done to remove residual stress left in the joint which may cause brittle fracture 2.Why pre-heating is done on some pipe before starting welding? To slow down the cooling rate 3.Why post –heating is done on some pipe after the welding is over ? To ... Read More »

Questions for RTR Piping

Stress questions

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 »

Questions Related to Structural Steel

oilandgasclub.com coating insulation cathodic protection

1. Describe the steps used for erection of structural steel? Material received at site Concrete bases and anchor bolts Shims Pre assembly at ground level Main construction steel erection (dimension bolt) Tightening for anchor bolt Alignment for structural steel Tightening for steel Tightening for anchor bolts. Grouting Complete structural steel erection (secondary beams, bracing) Calibration of whrench and device Modification ... Read More »

Questions Related to Plumbing

oilandgasclub.com plumbing

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 »

Isometric for Pump Discharge Line & Suction Line

isometrtic

Isometric for Pump discharge Line Isometric view for the below Pump suction line 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 ... Read More »

How the Centrifugal Force Generated in the Centrifugal Pump?

centrifugal pump

Answer: – The process liquid enters the suction nozzle and then into the eye (center) of the revolving device known as an Impeller. When the impeller rotates, it spines the liquid sittings in the cavities between the vanes outward and provides centrifugal acceleration. As the liquid leaves the eye of the impeller alow – pressure area is created causing more liquid ... Read More »

Questions Related to Pump / Alignment / Pump Piping

oilandgasclub.com pump

1. What are different types of pumps? Basically there are two types of pumps. A. Centrifugal pump. B. Positive displacement pump. 2. What are the different types of centrifugal pump? Different types of centrifugal pump are: – A. Single stage or B. Multi-stage 3. What is the basic difference between single stage and multi-stage centrifugal pump? The Single stage pump ... Read More »

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