What is BS EN 12516-2 about?
BS EN 12516-2 is the second part of the industrial valve strength series. BS EN 12516-2 specifies the method for the strength calculation of the shell with respect to the internal pressure of the valve.
Together with the other documents in the series, BS EN 12516-2 specifies methods for determining the thickness of steel valve shells by calculation methods. BS EN 12516-2 also specifies methods for calculating the thickness of valve shells in metallic materials other than steel.
BS EN 12516-2 gives information about calculating formulae, calculation methods for wall thickness of valve bodies, glands, flange, pressure sealed bonnets, and covers.
Tabulated pressure-temperature ratings apply to a group of materials and are calculated using selected stress, which is determined from the material properties representative of the group, using safety factors defined in BS EN 12516-2.
Who is BS EN 12516-2 for?
BS EN 12516-2 on industrial valve strength is useful for organizations that design, build and maintain industrial valves:
- Oil and natural gas
- Chemical plants
- Residential uses
- Manufacturing sectors
- Petrochemicals
- Marine industries
Users:
- Manufacturers and suppliers of industrial valves
- Industries with gas storage tanks
- Inspection bodies
- Mechanical engineers
Why should you use BS EN 12516-2?
The function of the valve is to control the flow, pressure, velocity and direction of liquids. Fitting a valve correctly increases systems life expectancy and lowers the effects of cavitation. BS EN 12516-2 provides you with design and safety guidelines that must be adhered to by manufacturers to design effective valves.
BS EN 12516-2 covers all the requirements relating to strength and thickness calculation for steel. BS EN 12516-2 also gives specifications of valve shells in other metallic materials. The benefit of the calculation method is that it allows the most efficient design, using the allowable stresses for the actual material selected for the application.
The calculated pressure using BS EN 12516-2 is limited by the ceiling pressure which sets up an upper boundary for high-strength materials and limits the deflection.
What’s changed since the last update?
BS EN 12516-2:2014+A1:2021 supersedes BS EN 125162:2014. BS EN 12516-2:2014+A1:2021 includes some technical changes with respect to BS EN 125162:2014. These include:
- The normative references were updated
- All formulae and figures have been renumbered; 10.6 “Design temperature” became 10.5 “Calculation of the bolt diameter”
- Some formulae were changed
- The figures were changed and/or updated
- Tables, clauses, subclauses and some annexes were updated
