Piping 
Isolation Philosophy describes methods for isolating sections of plant to permit safe operation, and provide access for maintenance or inspection. The methods described here are applicable for all hazardous and non-hazardous process and utility systems. Provision shall be made to isolate all equipment, either separately or commonly, within a process or non-hydrocarbon system. Maintenance isolation … Read more
Emergency shut down valve (ESD) valves are required to contain and protect sections of a plant in the event of an emergency such as a fire. Standard types of valve intended for ESD service must achieve the highest degree of functional reliability and pressure boundary integrity and may be affected by legislation in some countries. … Read more
A scrapper tee, also known as a flow tee or barred tee, is a type of pipe fitting that is used to ensure the safe passage of pipeline pigs across branch connections. A pig is a tool that is inserted into a pipeline to clean, inspect, or modify the pipeline. The scrapper tee has a … Read more
Duplex Stainless Steel Type Duplex stainless steel DSS is divided into two sub-families, DSS (22%Cr) and SDSS (25%Cr). SDSS has better corrosion resistance and may also be used for seawater service. SDSS may be preferred to DSS also for its higher strength, resulting in reduced wall thickness, which may be of interest and even necessary for … Read more
Piping engineer interview questions For piping engineer interview questions (material Engg) Below are the basic questions asked in piping engineer interview questions 1.Can you explain in detail three or more major differences between code ANSI B31.1 and code ANSIB31.3? Answer: There is only one major difference between the two, B31.1 is for Power Piping, and … Read more
Copper-Nickel Material All copper-nickel piping as a minimum shall be supplied in 16-bar system. Velocity in Cu-Ni piping shall not exceed 1.6 m/sec for 2″ NB and below and 3.3 m/sec. for 3″ NB and above. Fluid velocities in copper piping shall not exceed 1.5 m/sec. Design of Cu-Ni piping system shall be such as … Read more
Chlorinated Poly Vinyl Chloride CPVC has become an important engineering thermoplastic due to its relatively low cost, high heat deflection temperature, chemical inertness and outstanding mechanical, dielectric, and flame and smoke properties. At basic level, CPVC is a PVC homopolymer that has been subjected to a chlorination reaction. One of the most attractive features of … Read more
Scale Coupons: corrosion coupons are small pieces of metal that are exposed to a corrosive environment in order to measure the rate of corrosion. They are typically made of the same material as the equipment that is being monitored, and they are placed in the same environment. The coupons are weighed before and after exposure, … Read more
Calculating the corrosion allowance involves considering factors that can affect the rate of corrosion and adding a margin of safety to the original thickness of the piping. The corrosion allowance is typically specified during the design phase of a piping system to ensure its longevity and safety. How you can calculate the corrosion allowance Understand … Read more
Erosion corrosion also known as flow-enhanced corrosion or impingement attack takes place in flowing systems where turbulence occurs and solid particles i.e. sand is associated, typically in pipe bends (elbows), flow constrictions, and other internals, pipe fittings that alter flow direction or velocity. The mechanism for this type of corrosion is the continual flow of … Read more