# Category - Solved Sample Problems

## Tutorial: air density calculation

Theory behind air density calculation
Physical properties of air can be represented by the real gas equation, which is the modified version of ideal gas...

## NPSH Calculations

NPSH Definition

Net Positive Suction Head or NPSH for pumps can be defined as the difference between liquid pressure at pump suction and liquid vapor...

## Relief valve sizing for different cases

Pressure Safety Valves (PSV) or Pressure Relief Valves are important instruments in the process / manufacturing industry to protect enclosed equipment or...

## MMSCFD conversion calculation

Million Standard Cubic Feet per Day (MMSCFD)
MMSCFD is a unit for gas flow rates expressed at standard temperature and pressure conditions. Volumetric flow of...

## Calculation of NM3/hr and SM3/hr gas flow

Sample Problem Statement
What is the NM3/hr (normal cubic meter per hour) and SM3/hr (standard cubic meter per hour) flowrate corresponding to 100m3/hr of...

## Venting Calculation – Outbreathing

Venting Calculation for Outbreathing
Process tanks and vessels operating at low or atmospheric pressures are designed to handle low pressures and large...

## Venting Calculations – Inbreathing

Venting Calculation for Inbreathing
Process tanks and vessels operating at low or atmospheric pressures are designed to handle low pressures and large...

## Pressure Relief Valve Sizing Calculations – Steam Service

Sample Problem Statement
Design a pressure relief valve for the following service.
Protected equipment : Reboiler
Relief service : Steam
Reason for relief :...

## Pressure Relief Valve Sizing Calculations – Subcritical Gas Flow Service

Sample Problem Statement
Design a pressure relief valve for the following service.
Protected equipment : Separator vessel
Relief service : Fuel Gas
Reason for...

## Pressure Relief Valve Sizing Calculations – Critical Gas Flow Service

Sample Problem Statement
Design a pressure relief valve for the following service.
Protected equipment : Separator vessel
Relief service : Fuel Gas
Reason for...

## Pressure Relief Valve Sizing Calculations – Blocked Liquid Discharge

Sample Problem Statement
Design a  pressure relief valve for the following service.
Protected equipment : Separator vessel
Relief service : Water
Reason for...

## Use of heat exchanger bypass for design for different operating cases

The following example demonstrates how heat exchanger bypass can be effectively used for temperature control for a heat exchanger.
Question
Design a heat...