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Tag Archives: PDMS Course in Hyderabad

ASTM / American Society for Testing and Materials


There are numerous American Society for Testing and Materials designations cover the specification of wrought materials, forgings and castings used for plate, fittings, pipe and valves.The ASTM standards are directed to dimensional standards, materials and strength considerations. Some of the more material standards referenced are: A 36 Specification for Structural Steel A 53 Specification for Pipe, Steel, Black and Hot ... Read More »

EFW Pipe vs ERW Pipe


EFW Pipe vs ERW Pipe:- EFW Pipe Manufacturing Processing of Electric Fusion Welding, also called Continuous Welding begins as coiled steel with appropriate thickness, width and weight is made. To form a continuous ribbon of steel several coils are welded together. Then the steel ribbon is heated to the necessary temperature and formed into an oval. In the next step ... Read More »

ASME B16 Piping Component Standards


Piping component standard developed by the American Society of Mechanical Engineers or the American National Standards Institute (ANSI) B16.1 Cast Iron Pipe Flanges and Flanged Fittings B16.3 Malleable Iron Threaded Fittings, Class 150 and 300 B16.4 Cast Iron Threaded Fittings, Classes 125 and 250 B16.5 Pipe Flanges and Flanged Fittings B16.9 Factory Made Wrought Steel Buttwelding Fittings B16.10 Face to ... Read More »

Conversion of Units


Conversion Factor: 1 Meter = 3.28 Feet 1 Meter = 39.37 Inches 1 Meter = 100 Centimeters 1 Meter = 1000 Millimeters 1 Foot = 12 Inches 1 Inch = 2.54 Centimeters 1 Centimeter = 10 Millimeters S.no English – Fraction (Inch) English Decimal (Inch) English (Millimeter) 1. 1/16 0.0625 1.6 2. 1/8 0.125 3.2 3. 1/4 0.25 6.4 4. ... Read More »

Test Pressure Detail from Codes


Code Test type Test pressure minimum Test pressure maximum Test pressure holding time Examination ASME B31.1 Hydrostatic(1) 1.5 time design Max allowable test pressure any component or 90 percent of yield 10 minutes Design pressure ASME B31.1 Pneumatic 1.2 times design 1.5 times design or max allowable test pressure any component 10 minutes Lower of 100 psig or design pressure ... Read More »

What is Oil Refinery ?


When talking about refinery, we need to be able to differentiate and identify an oil refinery from the edible oil refinery. Basically, the oil refinery (or petroleum refinery) is an industrial process plant where crude oil (from crude petroleum) is processed and refined into more useful petroleum products, such as Gasoline Diesel fuel Asphalt base Heating oil Kerosene Liquefied petroleum ... Read More »

Most Important Documents Produced by Piping Engineer

Most Important Documents Produced by Piping Engineer

1) Plot plan:Arranging all plant units in a logical manner to take care of Material flow, statutory requirements, & good engineering Practices. 2) Equipment layouts: Document showing layout of all equipment’s satisfying the Process requirements, safety & statutory Regulations, operability ease of maintenance & economy. 3) Piping layouts: Document showing layouts of piping network to carry fluids From one equipment ... Read More »

Control Valve (Handled by Instrumentation Department)

oilandgasclub.com-piping -design-course-in-chennai

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 »

Process Flow Diagram Symbols – Valves

Piping codes and standards

Gate valve is a device used to control the flow of liquids and gases. Check valve also known as one-way valve, is to prevent the line of medium back. Globe valve is a mechanism used to control or stop the flow of liquid or gas through a pipe. Ball valve is a valve with a spherical disc, the part of ... Read More »

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 »

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