Category: Design and Engineering

Why not bury flare pipe header?

Why not bury flare pipe header? Flare and venting facilities is commonly provided in oil and gas plant for proper disposal of hydrocarbon gas during plant black start-up, normal start up, operation, emergency relief and plant depressurization. A proper design would have elevated flare pipe header sitting on pipe support and slopping down to flare / vent knock out drum (KOD). No loRead More…

Dual Plate Check Valve

Dual Plate Check Valve ▪ An all-purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing or lift check valve ▪ Employs two-spring-loaded plates hinged on a central hinge pin. ▪ When the flow decreases, the plates close by the action of torsion spring before flow reversal takes place. ▪ Offers the twin advantages of Read More…

Duckbill Check Valve

Duckbill Check Valve Description ▪ Duckbill valve is manufactured from rubber or synthetic elastomer, and shaped like the beak of a duck.  ▪ Commonly used in medical applications to prevent contamination due to backflow. ▪ One end of the valve is stretched over the outlet of a supply line, conforming itself to the shape of the line, usually round. The other end, the duckbill, rRead More…

Reinforcement Calculation for Welded Branch Connections

Reinforcement Calculation for Welded
Branch Connections: Any pipe having an opening, for branch connection will be weaken, if pipe wall thickness will not sustain the pressure.  In this case, pipe reinforcement is necessary to provide. The amount of reinforcement required to sustain the pressure, shall be determined in accordance with below reinforcement calculation. Added
reinforcemenRead More…

Tanks Bund Wall or Dyke Wall Calculation

Tanks Bund Wall or Dyke Wall Calculation: What
is bund wall? Bund wall is a Bunding constructed
alongside of storage tanks, where possibly polluting substances are stored and handled.
Bund wall also referred as dike wall, but dyke is normally used to describe
liquid containing tank facilities which prevent leaks and spillage from tanks
and pipes. Often, the liquids or substances stored inRead More…

Pipe Wall Thickness Calculation as per Code ASME B31.3

Pipe
Wall Thickness Calculation as per Code ASME B31.3: Pipe wall thickness calculation will be done per ASME B31.3 Clause 304.1.2 (3a), on account of internal pressure of pipe with below method. Basic Equations used for thickness
calculation are, t m =
t + c   and further t is calculated as
per below,      PD t  = —————-  &nbRead More…

Surge Relief Valves

What is Surge Relief Valves? In the event of the surge, the majority of the pressure is absorbed in the liquid and pipe, and just that quantity of liquid which is necessary to relieve pressures of unsafe proportions is discharged to the surge relief tank, by the way using this pressure is discharged is called surge relief valves. Surge Relief Valve Skids Typical
Surge Relief System
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Specifying Torque Values for Fasteners

Specifying Torque Values for Fasteners Specifying Torque Values for Fasteners is required for….. Reliability of the joint is dependent upon the bolt’s ability to clamp the parts together Preload generated by a bolt can be indirectly controlled by regulating the applied torque Typically, only 10% to 15% of the torque is used to stretch the bolt. Of the remaining torque, typicRead More…

Double Block and Bleed Valves

Double Block and Bleed Valves: Double Block-and-Bleed Valve – API
Definition According
to API 6D “Specification for Pipeline Valves” Double block and bleed valves is a “single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces. Read More…