i need help in selecting and specifying valve for application
the application
waste water
the pipe material is concrete
i am not sure what valve to use
butter fly , gate or ball valve
i want to ask what is the chemical cleaning used in cleaning fuel oil tank and is it better that sand plasting
as iam used to do sand plasting
and is it better to caot tank inside as my tank is without coating
in API 650 indesign section of bottom and shell plate
CA = corrosion allowance the Purchaser must define it
i don't know how to define it i know storage liquid , steel plate material
so please i want to know how to calculate corrosion allowance
thanks